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What is the Cluster API Provider CloudStack

The Cluster API brings declarative, Kubernetes-style APIs to cluster creation, configuration and management.

The API itself is shared across multiple cloud providers allowing for true Apache CloudStack hybrid deployments of Kubernetes. It is built atop the lessons learned from previous cluster managers such as kops and kubicorn.

Launching a Kubernetes cluster on Apache CloudStack

Check out the Getting Started Guide to create your first Kubernetes cluster on Apache CloudStack using Cluster API.

Features

  • Native Kubernetes manifests and API
  • Choice of Linux distribution (as long as a current cloud-init is available). Tested on Ubuntu, Centos, Rocky and RHEL
  • Support for single and multi-node control plane clusters
  • Deploy clusters on Isolated and Shared Networks
  • cloud-init based nodes bootstrapping

Compatibility with Cluster API and Kubernetes Versions

This provider’s versions are able to install and manage the following versions of Kubernetes:

Kubernetes Versionv1.22v1.23v1.24
CloudStack Provider (v0.4)✓✓✓

Compatibility with Apache CloudStack Versions

This provider’s versions are able to work on the following versions of Apache CloudStack:

CloudStack Version4.144.154.164.17
CloudStack Provider (v0.4)✓✓✓✓

Operating system images

Note: Cluster API Provider CloudStack relies on a few prerequisites which have to be already installed in the used operating system images, e.g. a container runtime, kubelet, kubeadm, etc. Reference images can be found in kubernetes-sigs/image-builder.

Prebuilt images can be found below :

HypervisorKubernetes VersionRocky Linux 8Ubuntu 20.04
KVMv1.22qcow2, md5qcow2, md5
v1.23qcow2, md5qcow2, md5
v1.24qcow2, md5qcow2, md5
VMwarev1.22ova, md5ova, md5
v1.23ova, md5ova, md5
v1.24ova, md5ova, md5
XenServerv1.22vhd, md5vhd, md5
v1.23vhd, md5vhd, md5
v1.24vhd, md5vhd, md5

Getting involved and contributing

Are you interested in contributing to cluster-api-provider-cloudstack? We, the maintainers and community, would love your suggestions, contributions, and help! Also, the maintainers can be contacted at any time to learn more about how to get involved:

Code of conduct

Participation in the Kubernetes community is governed by the Kubernetes Code of Conduct.

Github issues

Bugs

If you think you have found a bug please follow the instructions below.

  • Please spend a small amount of time giving due diligence to the issue tracker. Your issue might be a duplicate.
  • Get the logs from the cluster controllers. Please paste this into your issue.
  • Open a new issue.
  • Remember that users might be searching for your issue in the future, so please give it a meaningful title to help others.
  • Feel free to reach out to the Cluster API community on the Kubernetes Slack.

Tracking new features

We also use the issue tracker to track features. If you have an idea for a feature, or think you can help Cluster API Provider CloudStack become even more awesome follow the steps below.

  • Open a new issue.
  • Remember that users might be searching for your issue in the future, so please give it a meaningful title to help others.
  • Clearly define the use case, using concrete examples.
  • Some of our larger features will require some design. If you would like to include a technical design for your feature, please include it in the issue.
  • After the new feature is well understood, and the design agreed upon, we can start coding the feature. We would love for you to code it. So please open up a WIP (work in progress) pull request, and happy coding.

Our Contributors

Thank you to all contributors and a special thanks to our current maintainers & reviewers:

MaintainersReviewers
@rohityadavcloud@rohityadavcloud
@davidjumani@davidjumani
@jweite-amazon@jweite-amazon

All the CAPC contributors:

Getting Started

Prerequisites

  1. Follow the instructions here to install the following tools:

    Optional if you do not have an existing Kubernetes cluster

  2. Register the capi-compatible templates in your Apache CloudStack installation.

  3. Create a management cluster. This can either be :

    • An existing Kubernetes cluster: For production use-cases a “real” Kubernetes cluster should be used with appropriate backup and DR policies and procedures in place. The Kubernetes cluster must be at least v1.19.1.

    • A local cluster created with kind, for non production use

      kind create cluster

  4. Set up Apache CloudStack credentials as a secret in the management cluster

    • Create a file named cloud-config.yaml in the repo’s root directory, substituting in your own environment’s values 
      apiVersion: v1
kind: Secret
metadata:
  name: cloudstack-credentials
  namespace: default
type: Opaque
stringData:
  api-key: <cloudstackApiKey>
  secret-key: <cloudstackSecretKey>
  api-url: <cloudstackApiUrl>
  verify-ssl: "false"
    • Apply this secret to the management cluster:
      • With the management cluster’s KUBECONFIG in effect: 
        kubectl apply -f cloud-config.yaml
    • Delete cloud-config.yaml when done, for security

Initialize the management cluster

Run the following command to turn your cluster into a management cluster and load the Apache CloudStack components into it.

clusterctl init --infrastructure cloudstack

Creating a CAPC Cluster:

  1. Set up the environment variables. It will be populated by the values set here. See the example values below (and replace with your own!)

    The entire list of configuration variables as well as how to fetch them can be found here

    # The Apache CloudStack zone in which the cluster is to be deployed
export CLOUDSTACK_ZONE_NAME=zone1

# If the referenced network doesn't exist, a new isolated network
# will be created.
export CLOUDSTACK_NETWORK_NAME=GuestNet1

# The IP you put here must be available as an unused public IP on the network
# referenced above. If it's not available, the control plane will fail to create.
# You can see the list of available IP's when you try allocating a public
# IP in the network at
# Network -> Guest Networks -> <Network Name> -> IP Addresses
export CLUSTER_ENDPOINT_IP=192.168.1.161

# This is the standard port that the Control Plane process runs on
export CLUSTER_ENDPOINT_PORT=6443

# Machine offerings must be pre-created. Control plane offering
# must have have >2GB RAM available
export CLOUDSTACK_CONTROL_PLANE_MACHINE_OFFERING="Large Instance"
export CLOUDSTACK_WORKER_MACHINE_OFFERING="Small Instance"

# Referring to a prerequisite capi-compatible image you've loaded into Apache CloudStack
export CLOUDSTACK_TEMPLATE_NAME=kube-v1.23.3/ubuntu-2004

# The SSH KeyPair to log into the VM (Optional: you must use clusterctl --flavor *managed-ssh*)
export CLOUDSTACK_SSH_KEY_NAME=CAPCKeyPair6

  2. Generate the CAPC cluster spec yaml file

    clusterctl generate cluster capc-cluster \
    --kubernetes-version v1.23.3 \
    --control-plane-machine-count=1 \
    --worker-machine-count=1 \
    > capc-cluster-spec.yaml

  3. Apply the CAPC cluster spec to your kind management cluster

    kubectl apply -f capc-cluster-spec.yaml

  4. Check the progress of capc-cluster, and wait for all the components (with the exception of MachineDeployment/capc-cluster-md-0) to be ready. (MachineDeployment/capc-cluster-md-0 will not show ready until the CNI is installed.)

    clusterctl describe cluster capc-cluster

  5. Get the generated kubeconfig for your newly created Apache CloudStack cluster capc-cluster

    clusterctl get kubeconfig capc-cluster > capc-cluster.kubeconfig

  6. Install calico on the workload cluster so that pods can see each other

    KUBECONFIG=capc-cluster.kubeconfig kubectl apply -f https://projectcalico.docs.tigera.io/manifests/calico.yaml

  7. Verify the K8s cluster is fully up. (It may take a minute for the nodes status to all reach ready state.)

    1. Run KUBECONFIG=capc-cluster.kubeconfig kubectl get nodes, and observe the following output
    NAME                               STATUS   ROLES                  AGE     VERSION
capc-cluster-control-plane-xsnxt   Ready    control-plane,master   2m56s   v1.20.10
capc-cluster-md-0-9fr9d            Ready    <none>                 112s    v1.20.10

Validating the CAPC Cluster:

Run a simple kubernetes app called ‘test-thing’

  1. Create the container
KUBECONFIG=capc-cluster.kubeconfig kubectl run test-thing --image=rockylinux/rockylinux:8 --restart=Never -- /bin/bash -c 'echo Hello, World!'
KUBECONFIG=capc-cluster.kubeconfig kubectl get pods
  1. Wait for the container to complete, and check the logs for ‘Hello, World!’
KUBECONFIG=capc-cluster.kubeconfig kubectl logs test-thing

kubectl/clusterctl Reference:

  • Pods in capc-cluster -- cluster running in Apache CloudStack
% KUBECONFIG=capc-cluster.kubeconfig kubectl get pods -A
NAMESPACE     NAME                                                       READY   STATUS      RESTARTS   AGE
default       test-thing                                                 0/1     Completed   0          2m43s
kube-system   calico-kube-controllers-784dcb7597-dw42t                   1/1     Running     0          4m31s
kube-system   calico-node-mmp2x                                          1/1     Running     0          4m31s
kube-system   calico-node-vz99f                                          1/1     Running     0          4m31s
kube-system   coredns-74ff55c5b-n6zp7                                    1/1     Running     0          9m18s
kube-system   coredns-74ff55c5b-r8gvj                                    1/1     Running     0          9m18s
kube-system   etcd-capc-cluster-control-plane-tknwx                      1/1     Running     0          9m21s
kube-system   kube-apiserver-capc-cluster-control-plane-tknwx            1/1     Running     0          9m21s
kube-system   kube-controller-manager-capc-cluster-control-plane-tknwx   1/1     Running     0          9m21s
kube-system   kube-proxy-6g9zb                                           1/1     Running     0          9m3s
kube-system   kube-proxy-7gjbv                                           1/1     Running     0          9m18s
kube-system   kube-scheduler-capc-cluster-control-plane-tknwx            1/1     Running     0          9m21s
  • Pods in original kind cluster (also called bootstrap cluster, management cluster)
% kubectl  get pods -A
NAMESPACE                           NAME                                                             READY   STATUS    RESTARTS   AGE
capc-system                         capc-controller-manager-55798f8594-lp2xs                         1/1     Running   0          30m
capi-kubeadm-bootstrap-system       capi-kubeadm-bootstrap-controller-manager-7857cd7bb8-rldnw       1/1     Running   0          30m
capi-kubeadm-control-plane-system   capi-kubeadm-control-plane-controller-manager-6cc4b4d964-tz5zq   1/1     Running   0          30m
capi-system                         capi-controller-manager-7cfcfdf99b-79lr9                         1/1     Running   0          30m
cert-manager                        cert-manager-848f547974-dl7hc                                    1/1     Running   0          31m
cert-manager                        cert-manager-cainjector-54f4cc6b5-gfgsw                          1/1     Running   0          31m
cert-manager                        cert-manager-webhook-7c9588c76-5m2b2                             1/1     Running   0          31m
kube-system                         coredns-558bd4d5db-22zql                                         1/1     Running   0          48m
kube-system                         coredns-558bd4d5db-7g7kh                                         1/1     Running   0          48m
kube-system                         etcd-capi-test-control-plane                                     1/1     Running   0          48m
kube-system                         kindnet-7p2dq                                                    1/1     Running   0          48m
kube-system                         kube-apiserver-capi-test-control-plane                           1/1     Running   0          48m
kube-system                         kube-controller-manager-capi-test-control-plane                  1/1     Running   0          48m
kube-system                         kube-proxy-cwrhv                                                 1/1     Running   0          48m
kube-system                         kube-scheduler-capi-test-control-plane                           1/1     Running   0          48m
local-path-storage                  local-path-provisioner-547f784dff-f2g7r                          1/1     Running   0          48m

Topics

TODO :

  • Registering External Clusters in CloudStack
  • Data Disks
  • Diff between CKS and CAPC
  • E2E Tests

Move From Bootstrap

This documentation describes how to move Cluster API related objects from bootstrap cluster to target cluster. Check clusterctl move for further information.

Pre-condition

Bootstrap cluster

# kubectl get pods --all-namespaces
NAMESPACE                           NAME                                                             READY   STATUS    RESTARTS   AGE
capc-system                         capc-controller-manager-5d8b989c5c-zqvcn                         1/1     Running   0          23m
capi-kubeadm-bootstrap-system       capi-kubeadm-bootstrap-controller-manager-58db4b5555-crcc8       1/1     Running   0          23m
capi-kubeadm-control-plane-system   capi-kubeadm-control-plane-controller-manager-86c4dcbc4c-8xvql   1/1     Running   0          23m
capi-system                         capi-controller-manager-56f77c8f7b-s5q8f                         1/1     Running   0          23m
cert-manager                        cert-manager-848f547974-tzqtg                                    1/1     Running   0          23m
cert-manager                        cert-manager-cainjector-54f4cc6b5-hslzq                          1/1     Running   0          23m
cert-manager                        cert-manager-webhook-7c9588c76-pz42g                             1/1     Running   0          23m
kube-system                         coredns-558bd4d5db-2xxlz                                         1/1     Running   0          34m
kube-system                         coredns-558bd4d5db-wjdbw                                         1/1     Running   0          34m
kube-system                         etcd-kind-control-plane                                          1/1     Running   0          34m
kube-system                         kindnet-lkgjb                                                    1/1     Running   0          34m
kube-system                         kube-apiserver-kind-control-plane                                1/1     Running   0          34m
kube-system                         kube-controller-manager-kind-control-plane                       1/1     Running   0          34m
kube-system                         kube-proxy-gv7pv                                                 1/1     Running   0          34m
kube-system                         kube-scheduler-kind-control-plane                                1/1     Running   0          34m
local-path-storage                  local-path-provisioner-547f784dff-79kq4                          1/1     Running   0          34m

Target cluster

# kubectl get pods --kubeconfig target.kubeconfig --all-namespaces
NAMESPACE            NAME                                           READY   STATUS    RESTARTS   AGE
kube-system          calico-kube-controllers-784dcb7597-dw42t       1/1     Running   0          41m
kube-system          calico-node-mmp2x                              1/1     Running   0          41m
kube-system          calico-node-vz99f                              1/1     Running   0          41m
kube-system          coredns-558bd4d5db-5pvfm                       1/1     Running   0          43m
kube-system          coredns-558bd4d5db-gcv5j                       1/1     Running   0          43m
kube-system          etcd-target-control-plane                      1/1     Running   0          43m
kube-system          kindnet-4w84z                                  1/1     Running   0          43m
kube-system          kube-apiserver-target-control-plane            1/1     Running   0          43m
kube-system          kube-controller-manager-target-control-plane   1/1     Running   0          43m
kube-system          kube-proxy-zstvt                               1/1     Running   0          43m
kube-system          kube-scheduler-target-control-plane            1/1     Running   0          43m

The bootstrap cluster is currently managing an existing workload cluster

# clusterctl describe cluster cloudstack-capi
NAME                                                                                 READY  SEVERITY  REASON  SINCE  MESSAGE
Cluster/cloudstack-capi                                                              True                     9m31s
├─ClusterInfrastructure - CloudStackCluster/cloudstack-capi
├─ControlPlane - KubeadmControlPlane/cloudstack-capi-control-plane                   True                     9m31s
│ └─Machine/cloudstack-capi-control-plane-xhgb9                                      True                     9m51s
│   └─MachineInfrastructure - CloudStackMachine/cloudstack-capi-control-plane-59qrb
└─Workers
  └─MachineDeployment/cloudstack-capi-md-0                                           True                     7m20s
    └─Machine/cloudstack-capi-md-0-75499bbf6-zqktd                                   True                     8m56s
      └─MachineInfrastructure - CloudStackMachine/cloudstack-capi-md-0-cl5ht

Install Cloudstack Cluster API provider into target cluster

You need install Apache CloudStack Cluster API providers into target cluster first.

# clusterctl --kubeconfig target.kubeconfig init --infrastructure cloudstack
Fetching providers
Installing cert-manager Version="v1.5.3"
Waiting for cert-manager to be available...
Installing Provider="cluster-api" Version="v1.1.3" TargetNamespace="capi-system"
Installing Provider="bootstrap-kubeadm" Version="v1.1.3" TargetNamespace="capi-kubeadm-bootstrap-system"
Installing Provider="control-plane-kubeadm" Version="v1.1.3" TargetNamespace="capi-kubeadm-control-plane-system"
Installing Provider="infrastructure-cloudstack" Version="v1.0.0" TargetNamespace="capc-system"

Your management cluster has been initialized successfully!

You can now create your first workload cluster by running the following:

  clusterctl generate cluster [name] --kubernetes-version [version] | kubectl apply -f -

Move objects from bootstrap cluster into target cluster.

CRD, objects such as CloudstackCluster, CloudstackMachine etc need to be moved.

# clusterctl move --to-kubeconfig target.kubeconfig -v 10

Using configuration File="/home/djumani/.cluster-api/clusterctl.yaml"
Performing move...
Discovering Cluster API objects
Cluster Count=1
KubeadmConfigTemplate Count=1
KubeadmControlPlane Count=1
MachineDeployment Count=1
MachineSet Count=1
CloudStackCluster Count=1
CloudStackMachine Count=2
CloudStackMachineTemplate Count=2
Machine Count=2
KubeadmConfig Count=2
ConfigMap Count=1
Secret Count=8
Total objects Count=23
Excluding secret from move (not linked with any Cluster) name="default-token-nd9nb"
Moving Cluster API objects Clusters=1
Moving Cluster API objects ClusterClasses=0
Pausing the source cluster
Set Cluster.Spec.Paused Paused=true Cluster="cloudstack-capi" Namespace="default"
Pausing the source cluster classes
Creating target namespaces, if missing
Creating objects in the target cluster
Creating Cluster="cloudstack-capi" Namespace="default"
Creating CloudStackMachineTemplate="cloudstack-capi-md-0" Namespace="default"
Creating KubeadmControlPlane="cloudstack-capi-control-plane" Namespace="default"
Creating CloudStackCluster="cloudstack-capi" Namespace="default"
Creating KubeadmConfigTemplate="cloudstack-capi-md-0" Namespace="default"
Creating MachineDeployment="cloudstack-capi-md-0" Namespace="default"
Creating CloudStackMachineTemplate="cloudstack-capi-control-plane" Namespace="default"
Creating Secret="cloudstack-capi-proxy" Namespace="default"
Creating Machine="cloudstack-capi-control-plane-xhgb9" Namespace="default"
Creating Secret="cloudstack-capi-ca" Namespace="default"
Creating Secret="cloudstack-capi-etcd" Namespace="default"
Creating MachineSet="cloudstack-capi-md-0-75499bbf6" Namespace="default"
Creating Secret="cloudstack-capi-kubeconfig" Namespace="default"
Creating Secret="cloudstack-capi-sa" Namespace="default"
Creating Machine="cloudstack-capi-md-0-75499bbf6-zqktd" Namespace="default"
Creating CloudStackMachine="cloudstack-capi-control-plane-59qrb" Namespace="default"
Creating KubeadmConfig="cloudstack-capi-control-plane-r6ns8" Namespace="default"
Creating KubeadmConfig="cloudstack-capi-md-0-z9ndx" Namespace="default"
Creating Secret="cloudstack-capi-control-plane-r6ns8" Namespace="default"
Creating CloudStackMachine="cloudstack-capi-md-0-cl5ht" Namespace="default"
Creating Secret="cloudstack-capi-md-0-z9ndx" Namespace="default"
Deleting objects from the source cluster
Deleting Secret="cloudstack-capi-md-0-z9ndx" Namespace="default"
Deleting KubeadmConfig="cloudstack-capi-md-0-z9ndx" Namespace="default"
Deleting Secret="cloudstack-capi-control-plane-r6ns8" Namespace="default"
Deleting CloudStackMachine="cloudstack-capi-md-0-cl5ht" Namespace="default"
Deleting Machine="cloudstack-capi-md-0-75499bbf6-zqktd" Namespace="default"
Deleting CloudStackMachine="cloudstack-capi-control-plane-59qrb" Namespace="default"
Deleting KubeadmConfig="cloudstack-capi-control-plane-r6ns8" Namespace="default"
Deleting Secret="cloudstack-capi-proxy" Namespace="default"
Deleting Machine="cloudstack-capi-control-plane-xhgb9" Namespace="default"
Deleting Secret="cloudstack-capi-ca" Namespace="default"
Deleting Secret="cloudstack-capi-etcd" Namespace="default"
Deleting MachineSet="cloudstack-capi-md-0-75499bbf6" Namespace="default"
Deleting Secret="cloudstack-capi-kubeconfig" Namespace="default"
Deleting Secret="cloudstack-capi-sa" Namespace="default"
Deleting CloudStackMachineTemplate="cloudstack-capi-md-0" Namespace="default"
Deleting KubeadmControlPlane="cloudstack-capi-control-plane" Namespace="default"
Deleting CloudStackCluster="cloudstack-capi" Namespace="default"
Deleting KubeadmConfigTemplate="cloudstack-capi-md-0" Namespace="default"
Deleting MachineDeployment="cloudstack-capi-md-0" Namespace="default"
Deleting CloudStackMachineTemplate="cloudstack-capi-control-plane" Namespace="default"
Deleting Cluster="cloudstack-capi" Namespace="default"
Resuming the target cluter classes
Resuming the target cluster
Set Cluster.Spec.Paused Paused=false Cluster="cloudstack-capi" Namespace="default"

Check cluster status

# clusterctl --kubeconfig target.kubeconfig describe cluster cloudstack-capi
NAME                                                                                 READY  SEVERITY  REASON  SINCE  MESSAGE
Cluster/cloudstack-capi                                                              True                     107s
├─ClusterInfrastructure - CloudStackCluster/cloudstack-capi
├─ControlPlane - KubeadmControlPlane/cloudstack-capi-control-plane                   True                     107s
│ └─Machine/cloudstack-capi-control-plane-xhgb9                                      True                     115s
│   └─MachineInfrastructure - CloudStackMachine/cloudstack-capi-control-plane-59qrb
└─Workers
  └─MachineDeployment/cloudstack-capi-md-0                                           True                     115s
    └─Machine/cloudstack-capi-md-0-75499bbf6-zqktd                                   True                     115s
      └─MachineInfrastructure - CloudStackMachine/cloudstack-capi-md-0-cl5ht

# kubectl get cloudstackcluster --kubeconfig target.kubeconfig --all-namespaces
NAMESPACE   NAME              CLUSTER           READY   NETWORK
default     cloudstack-capi   cloudstack-capi   true

# kubectl get cloudstackmachines --kubeconfig target.kubeconfig --all-namespaces
NAMESPACE   NAME                                  CLUSTER           INSTANCESTATE   READY   PROVIDERID                                           MACHINE
default     cloudstack-capi-control-plane-59qrb   cloudstack-capi                   true    cloudstack:///81b9d65e-b365-4535-956f-9f845b730c54   cloudstack-capi-control-plane-xhgb9
default     cloudstack-capi-md-0-cl5ht            cloudstack-capi                   true    cloudstack:///a05408b1-47fe-46b5-b128-a9d5492eaabf   cloudstack-capi-md-0-75499bbf6-zqktd

Troubleshooting

This guide (based on kind but others should be similar) explains general info on how to debug issues if a cluster creation fails.

Get logs of Cluster API controller containers

kubectl -n capc-system logs -l control-plane=capc-controller-manager -c manager

Similarly, the logs of the other controllers in the namespaces capi-system and cabpk-system can be retrieved.

Authenticaton Error

This is caused when the API Key and / or the Signature is invalid. Please check them in the Accounts > User > API Key section of the UI or via the getUserKeys API

E0325 04:30:51.030540       1 controller.go:317] controller/cloudstackcluster "msg"="Reconciler error" "error"="CloudStack API error 401 (CSExceptionErrorCode: 0): unable to verify user credentials and/or request signature" "name"="kvm-capi" "namespace"="default" "reconciler group"="infrastructure.cluster.x-k8s.io" "reconciler kind"="CloudStackCluster"

Cluster reconciliation failed with error: No match found for xxxx: {Count:0 yyyy:[]}

This is caused when resource ‘yyyy’ with the name ‘xxxx’ does not exist on the CloudStack instance

E0325 04:12:44.047381       1 controller.go:317] controller/cloudstackcluster "msg"="Reconciler error" "error"="No match found for zone-1: \u0026{Count:0 Zones:[]}" "name"="kvm-capi" "namespace"="default" "reconciler group"="infrastructure.cluster.x-k8s.io" "reconciler kind"="CloudStackCluster"

In such a case, check the spelling of the resource name or create it in CloudStack. Following which, update it in the workload cluster yaml (in cases where the resource name is not immutable) or delete the capi resource and re-create it with the updated name

Custom Images

This document will help you get a CAPC Kubernetes cluster up and running with your custom image.

Prebuilt Images

An image defines the operating system and Kubernetes components that will populate the disk of each node in your cluster.

As of now, prebuilt images for KVM, VMware and XenServer are available here

Building a custom image

Cluster API uses the Kubernetes Image Builder tools. You should use the QEMU images from that project as a starting point for your custom image.

The Image Builder Book explains how to build the images defined in that repository, with instructions for CloudStack CAPI Images in particular.

The image is built using KVM hypervisor as a qcow2 image. Depending on they hypervisor requirements, it can then converted into ova for VMware and vhd for XenServer via the convert-cloudstack-image.sh script.

Operating system requirements

For your custom image to work with Cluster API, it must meet the operating system requirements of the bootstrap provider. For example, the default kubeadm bootstrap provider has a set of preflight checks that a VM is expected to pass before it can join the cluster.

Kubernetes version requirements

The reference images are each built to support a specific version of Kubernetes. When using your custom images based on them, take care to match the image to the version: field of the KubeadmControlPlane and MachineDeployment in the YAML template for your workload cluster.

Creating a cluster from a custom image

To use a custom image, it needs to be referenced in an image: section of your CloudStackMachineTemplate. Be sure to also update the version in the KubeadmControlPlane and MachineDeployment cluster spec.

apiVersion: infrastructure.cluster.x-k8s.io/v1beta1
kind: CloudStackMachineTemplate
metadata:
  name: capi-quickstart-control-plane
spec:
  template:
    spec:
      offering: ControlPlaneOffering
      template: custom-image-name

Upgrading Kubernetes Versions

To upgrade to a new Kubernetes release with custom images requires this preparation:

  • Create a new custom image which supports the Kubernetes release version
  • Register the custom image as a template in Apache CloudStack
  • Copy the existing CloudStackMachineTemplate and change its image: section to reference the new custom image
  • Create the new CloudStackMachineTemplate on the management cluster
  • Modify the existing KubeadmControlPlane and MachineDeployment to reference the new CloudStackMachineTemplate and update the version: field to match

See Upgrading workload clusters for more details.

SSH Access To Nodes

This guide will detail the steps to access the CAPC nodes.

Please note that this will only work on Isolated Networks. To access Nodes on shared networks, please configure the routes on the external network’s management plane

Prerequisites

The user must either know the password of the node or have the respective SSH private key matching the public key in the authorized_keys file in the node

To see how to pass a key pair to the node, checkout the keypair configuration

Configure Network Access

In order to access the nodes, the following changes need to be made in Apache CloudStack

  1. Select the Public IP belonging to the network via which users can access the VM. Either use the exiting IP or acquire a new IP.

    Alt text

  2. Add a firewall rule to allow access on the desired port

    Alt text Alt text

  3. Add a port forwarding rule with the corresponding port to the firewall rule that was just created

    Alt text

    Select the VM to which you would like SSH Access

    Alt text Alt text

SSH Into The Node

Now access the node via the Public IP using the corresponding SSH Keypair

$ ssh ubuntu@10.0.53.123 -i path/to/key

Welcome to Ubuntu 20.04.3 LTS (GNU/Linux 5.4.0-97-generic x86_64)

 * Documentation:  https://help.ubuntu.com
 * Management:     https://landscape.canonical.com
 * Support:        https://ubuntu.com/advantage

The programs included with the Ubuntu system are free software;
the exact distribution terms for each program are described in the
individual files in /usr/share/doc/*/copyright.

Ubuntu comes with ABSOLUTELY NO WARRANTY, to the extent permitted by
applicable law.

To run a command as administrator (user "root"), use "sudo <command>".
See "man sudo_root" for details.

ubuntu@capc-cluster-control-plane-2cq49:~$

Unstacked etcd

There are two types of etcd topologies for configuring a Kubernetes cluster:

  • Stacked: The etcd members and control plane components are co-located (run on the same node/machines)
  • Unstacked/External: With the unstacked or external etcd topology, etcd members have dedicated machines and are not co-located with control plane components

The unstacked etcd topology is recommended for a HA cluster for the following reasons:

  • External etcd topology decouples the control plane components and etcd member. So if a control plane-only node fails, or if there is a memory leak in a component like kube-apiserver, it won’t directly impact an etcd member.
  • Etcd is resource intensive, so it is safer to have dedicated nodes for etcd, since it could use more disk space or higher bandwidth. Having a separate etcd cluster for these reasons could ensure a more resilient HA setup.

More details can be found here

Local storage

In this configuration, the storage used by etcd is a local directory on the node, rather than within the container itself. This provides resilience in case the etcd pod is terminated as no data is lost, and can be read from the local directory once the new etcd pod comes up

Local storage for etcd can be configured by adding the etcd field to the KubeadmControlPlane.spec.kubeadmConfigSpec.clusterConfiguration spec. The value should point to an empty directory on the node

  kubeadmConfigSpec:
    clusterConfiguration:
      imageRepository: registry.k8s.io
      etcd:
        local:
          dataDir: /var/lib/etcddisk/etcd

If the user wishes to use a separate data disk as local storage, the can be formatted and mounted as shown :

  kubeadmConfigSpec:
    diskSetup:
      filesystems:
      - device: /dev/vdb
        filesystem: ext4
        label: etcd_disk
    mounts:
    - - LABEL=etcd_disk
      - /var/lib/etcddisk

External etcd

In this configuration, etcd does not run on the Kubernetes Cluster. Instead, the Kubernetes Cluster uses an externally managed etcd cluster. This provides additional availability if the entire control plane node goes down, the caveat being that the externally managed etcd cluster must be always available.

External etcd can be configured by adding the etcd field to the KubeadmControlPlane.spec.kubeadmConfigSpec.clusterConfiguration spec. The value should point to an empty directory on the node

  kubeadmConfigSpec:
    clusterConfiguration:
      imageRepository: registry.k8s.io
      etcd:
        external:
          endpoints:
            - ${ETCD_ENDPOINT}
          caFile: /etc/kubernetes/pki/etcd/ca.crt
          certFile: /etc/kubernetes/pki/apiserver-etcd-client.crt
          keyFile: /etc/kubernetes/pki/apiserver-etcd-client.key

Additionally, the certificates have to be passed as Secrets as shown below :

# Ref: https://github.com/kubernetes-retired/cluster-api-bootstrap-provider-kubeadm/blob/master/docs/external-etcd.md
kind: Secret
apiVersion: v1
metadata:
  name: ${CLUSTER_NAME}-apiserver-etcd-client
data:
  # base64 encoded /etc/etcd/pki/apiserver-etcd-client.crt
  tls.crt: |
    ${BASE64_ENCODED__APISERVER_ETCD_CLIENT_CRT}
  # base64 encoded /etc/etcd/pki/apiserver-etcd-client.key
  tls.key: |
    ${BASE64_ENCODED__APISERVER_ETCD_CLIENT_KEY}

CloudStack Permissions for CAPC

The account that CAPC runs under must minimally be a Domain Admin type account with a role offering the following permissions

  • assignToLoadBalancerRule
  • associateIpAddress
  • createAffinityGroup
  • createEgressFirewallRule
  • createLoadBalancerRule
  • createNetwork
  • createTags
  • deleteAffinityGroup
  • deleteNetwork
  • deleteTags
  • deployVirtualMachine
  • destroyVirtualMachine
  • disassociateIpAddress
  • getUserKeys
  • listAccounts
  • listAffinityGroups
  • listDiskOfferings
  • listDomains
  • listLoadBalancerRuleInstances
  • listLoadBalancerRules
  • listNetworkOfferings
  • listNetworks
  • listPublicIpAddresses
  • listServiceOfferings
  • listSSHKeyPairs
  • listTags
  • listTemplates
  • listUsers
  • listVirtualMachines
  • listVirtualMachinesMetrics
  • listVolumes
  • listZones
  • queryAsyncJobResult
  • startVirtualMachine
  • stopVirtualMachine
  • updateVMAffinityGroup

This permission set has been verified to successfully run the CAPC E2E test suite (Oct 11, 2022).

Developer Guide

Initial setup for development environment

Prerequisites

Please install the following tools :

  1. go
    • Get the latest patch version for go v1.17.
  2. kind
    • GO111MODULE="on" go get sigs.k8s.io/kind@v0.12.0.
  3. kustomize
  4. envsubst
  5. make

Get the source

Fork the cluster-api-provider-cloudstack repo:

cd "$(go env GOPATH)"/src
mkdir sigs.k8s.io
cd sigs.k8s.io/
git clone git@github.com:<GITHUB USERNAME>/cluster-api-provider-cloudstack.git
cd cluster-api-provider-cloudstack
git remote add upstream git@github.com:kubernetes-sigs/cluster-api-provider-cloudstack.git
git fetch upstream

Setup the CloudStack Environment

  1. Set up Apache CloudStack credentials

    • Create a file named cloud-config in the repo’s root directory, substituting in your own environment’s values

      [Global]
api-url = <cloudstackApiUrl>
api-key = <cloudstackApiKey>
secret-key = <cloudstackSecretKey>

    • Run the following command to save the above Apache CloudStack connection info into an environment variable, to be used by clusterctl, where it gets passed to CAPC:

      export CLOUDSTACK_B64ENCODED_SECRET=$(base64 -w0 -i cloud-config)

  2. Register the capi-compatible templates in your Apache CloudStack installation.

Running local management cluster for development

Before the next steps, make sure initial setup for development environment steps are complete.

There are two ways to build Apache CloudStack manager from local cluster-api-provider-cloudstack source and run it in local kind cluster:

Option 1: Setting up Development Environment with Tilt

Tilt is a tool for quickly building, pushing, and reloading Docker containers as part of a Kubernetes deployment. Many of the Cluster API engineers use it for quick iteration. Please see our Tilt instructions to get started.

Option 2: The Old-fashioned way

Running cluster-api and cluster-api-provider-cloudstack controllers in a kind cluster:

  1. Create a local kind cluster
    • kind create cluster
  2. Install core cluster-api controllers (the version must match the cluster-api version in go.mod)
    • clusterctl init
  3. Release manifests under ./out directory
    • RELEASE_TAG="e2e" make release-manifests
  4. Apply the manifests
    • kubectl apply -f ./out/infrastructure.yaml

Developing Cluster API Provider CloudStack with Tilt

This document describes how to use kind and Tilt for a simplified workflow that offers easy deployments and rapid iterative builds.

Before the next steps, make sure initial setup for development environment steps are complete.

Also, visit the Cluster API documentation on Tilt for more information on how to set up your development environment.

Create a kind cluster

First, make sure you have a kind cluster and that your KUBECONFIG is set up correctly:

kind create cluster

This local cluster will be running all the cluster api controllers and become the management cluster which then can be used to spin up workload clusters on Apache CloudStack.

Get the source

Get the source for core cluster-api for development with Tilt along with cluster-api-provider-cloudstack.

cd "$(go env GOPATH)"
mkdir sigs.k8s.io
cd sigs.k8s.io/
git clone git@github.com:kubernetes-sigs/cluster-api.git
cd cluster-api
git fetch upstream

Create a tilt-settings.json file

Next, create a tilt-settings.json file and place it in your local copy of cluster-api. Here is an example:

Example tilt-settings.json for CAPC clusters:

{
    "default_registry": "gcr.io/your-project-name-here",
    "provider_repos": ["../cluster-api-provider-cloudstack"],
    "enable_providers": ["kubeadm-bootstrap", "kubeadm-control-plane", "cloudstack"],
    "kustomize_substitutions": {
        "CLOUDSTACK_B64ENCODED_CREDENTIALS": "RANDOM_STRING==",
    }
}

Debugging

If you would like to debug CAPC (or core CAPI / another provider) you can run the provider with delve. This will then allow you to attach to delve and debug.

To do this you need to use the debug configuration in tilt-settings.json. Full details of the options can be seen here.

An example tilt-settings.json:

{
    "default_registry": "gcr.io/your-project-name-here",
    "provider_repos": ["../cluster-api-provider-cloudstack"],
    "enable_providers": ["kubeadm-bootstrap", "kubeadm-control-plane", "cloudstack"],
    "kustomize_substitutions": {
        "CLOUDSTACK_B64ENCODED_CREDENTIALS": "RANDOM_STRING==",
    },
    "debug": {
    "cloudstack": {
        "continue": true,
        "port": 30000
    }
  }
}

Once you have run tilt (see section below) you will be able to connect to the running instance of delve.

For vscode, you can use the a launch configuration like this:

    {
        "name": "Connect to CAPC",
        "type": "go",
        "request": "attach",
        "mode": "remote",
        "remotePath": "",
        "port": 30000,
        "host": "127.0.0.1",
        "showLog": true,
        "trace": "log",
        "logOutput": "rpc"
    }

For GoLand/IntelliJ add a new run configuration following these instructions.

Or you could use delve directly from the CLI using a command similar to this:

dlv-dap connect 127.0.0.1:3000

Run Tilt!

To launch your development environment, run:

tilt up

kind cluster becomes a management cluster after this point, check the pods running on the kind cluster kubectl get pods -A.

Create Workload Cluster

Creating a CAPC Cluster:

  1. Set up the environment variables. It will be populated by the values set here. See the example values below (and replace with your own!)

    The entire list of configuration variables as well as how to fetch them can be found here

    # The Apache CloudStack zone in which the cluster is to be deployed
export CLOUDSTACK_ZONE_NAME=zone1

# If the referenced network doesn't exist, a new isolated network
# will be created.
export CLOUDSTACK_NETWORK_NAME=GuestNet1

# The IP you put here must be available as an unused public IP on the network
# referenced above. If it's not available, the control plane will fail to create.
# You can see the list of available IP's when you try allocating a public
# IP in the network at
# Network -> Guest Networks -> <Network Name> -> IP Addresses
export CLUSTER_ENDPOINT_IP=192.168.1.161

# This is the standard port that the Control Plane process runs on
export CLUSTER_ENDPOINT_PORT=6443

# Machine offerings must be pre-created. Control plane offering
# must have have >2GB RAM available
export CLOUDSTACK_CONTROL_PLANE_MACHINE_OFFERING="Large Instance"
export CLOUDSTACK_WORKER_MACHINE_OFFERING="Small Instance"

# Referring to a prerequisite capi-compatible image you've loaded into Apache CloudStack
export CLOUDSTACK_TEMPLATE_NAME=kube-v1.23.3/ubuntu-2004

# The SSH KeyPair to log into the VM (Optional: you must use clusterctl --flavor *managed-ssh*)
export CLOUDSTACK_SSH_KEY_NAME=CAPCKeyPair6

  2. Generate the CAPC cluster spec yaml file

    clusterctl generate cluster capc-cluster \
    --kubernetes-version v1.23.3 \
    --control-plane-machine-count=1 \
    --worker-machine-count=1 \
    > capc-cluster-spec.yaml

  3. Apply the CAPC cluster spec to your kind management cluster

    kubectl apply -f capc-cluster-spec.yaml

  4. Check the progress of capc-cluster, and wait for all the components (with the exception of MachineDeployment/capc-cluster-md-0) to be ready. (MachineDeployment/capc-cluster-md-0 will not show ready until the CNI is installed.)

    clusterctl describe cluster capc-cluster

  5. Get the generated kubeconfig for your newly created Apache CloudStack cluster capc-cluster

    clusterctl get kubeconfig capc-cluster > capc-cluster.kubeconfig

  6. Install calico on the workload cluster so that pods can see each other

    KUBECONFIG=capc-cluster.kubeconfig kubectl apply -f https://projectcalico.docs.tigera.io/manifests/calico.yaml

  7. Verify the K8s cluster is fully up. (It may take a minute for the nodes status to all reach ready state.)

    1. Run KUBECONFIG=capc-cluster.kubeconfig kubectl get nodes, and observe the following output
    NAME                               STATUS   ROLES                  AGE     VERSION
capc-cluster-control-plane-xsnxt   Ready    control-plane,master   2m56s   v1.20.10
capc-cluster-md-0-9fr9d            Ready    <none>                 112s    v1.20.10

Validating the CAPC Cluster:

Run a simple kubernetes app called ‘test-thing’

  1. Create the container
KUBECONFIG=capc-cluster.kubeconfig kubectl run test-thing --image=rockylinux/rockylinux:8 --restart=Never -- /bin/bash -c 'echo Hello, World!'
KUBECONFIG=capc-cluster.kubeconfig kubectl get pods
  1. Wait for the container to complete, and check the logs for ‘Hello, World!’
KUBECONFIG=capc-cluster.kubeconfig kubectl logs test-thing

kubectl/clusterctl Reference:

  • Pods in capc-cluster -- cluster running in Apache CloudStack
% KUBECONFIG=capc-cluster.kubeconfig kubectl get pods -A
NAMESPACE     NAME                                                       READY   STATUS      RESTARTS   AGE
default       test-thing                                                 0/1     Completed   0          2m43s
kube-system   calico-kube-controllers-784dcb7597-dw42t                   1/1     Running     0          4m31s
kube-system   calico-node-mmp2x                                          1/1     Running     0          4m31s
kube-system   calico-node-vz99f                                          1/1     Running     0          4m31s
kube-system   coredns-74ff55c5b-n6zp7                                    1/1     Running     0          9m18s
kube-system   coredns-74ff55c5b-r8gvj                                    1/1     Running     0          9m18s
kube-system   etcd-capc-cluster-control-plane-tknwx                      1/1     Running     0          9m21s
kube-system   kube-apiserver-capc-cluster-control-plane-tknwx            1/1     Running     0          9m21s
kube-system   kube-controller-manager-capc-cluster-control-plane-tknwx   1/1     Running     0          9m21s
kube-system   kube-proxy-6g9zb                                           1/1     Running     0          9m3s
kube-system   kube-proxy-7gjbv                                           1/1     Running     0          9m18s
kube-system   kube-scheduler-capc-cluster-control-plane-tknwx            1/1     Running     0          9m21s
  • Pods in original kind cluster (also called bootstrap cluster, management cluster)
% kubectl  get pods -A
NAMESPACE                           NAME                                                             READY   STATUS    RESTARTS   AGE
capc-system                         capc-controller-manager-55798f8594-lp2xs                         1/1     Running   0          30m
capi-kubeadm-bootstrap-system       capi-kubeadm-bootstrap-controller-manager-7857cd7bb8-rldnw       1/1     Running   0          30m
capi-kubeadm-control-plane-system   capi-kubeadm-control-plane-controller-manager-6cc4b4d964-tz5zq   1/1     Running   0          30m
capi-system                         capi-controller-manager-7cfcfdf99b-79lr9                         1/1     Running   0          30m
cert-manager                        cert-manager-848f547974-dl7hc                                    1/1     Running   0          31m
cert-manager                        cert-manager-cainjector-54f4cc6b5-gfgsw                          1/1     Running   0          31m
cert-manager                        cert-manager-webhook-7c9588c76-5m2b2                             1/1     Running   0          31m
kube-system                         coredns-558bd4d5db-22zql                                         1/1     Running   0          48m
kube-system                         coredns-558bd4d5db-7g7kh                                         1/1     Running   0          48m
kube-system                         etcd-capi-test-control-plane                                     1/1     Running   0          48m
kube-system                         kindnet-7p2dq                                                    1/1     Running   0          48m
kube-system                         kube-apiserver-capi-test-control-plane                           1/1     Running   0          48m
kube-system                         kube-controller-manager-capi-test-control-plane                  1/1     Running   0          48m
kube-system                         kube-proxy-cwrhv                                                 1/1     Running   0          48m
kube-system                         kube-scheduler-capi-test-control-plane                           1/1     Running   0          48m
local-path-storage                  local-path-provisioner-547f784dff-f2g7r                          1/1     Running   0          48m

Building Cluster API Provider for CloudStack

Prerequisites:

  1. Follow the instructions here to install the following tools:

    1. docker
    2. kind
    3. kubectl
    4. clusterctl (Requires v1.1.5 +)

  2. Create a local docker registry to save your docker image - otherwise, you need an image registry to push it somewhere else.

  3. Download this script into your local and run it. This script will create a kind cluster and configure it to use local docker registry:

    wget https://raw.githubusercontent.com/kubernetes-sigs/cluster-api/main/hack/kind-install-for-capd.sh
chmod +x ./kind-install-for-capd.sh
./kind-install-for-capd.sh

  4. Set up Apache CloudStack credentials

    1. Create a file named cloud-config in the repo’s root directory, substituting in your own environment’s values

      [Global]
api-url = <cloudstackApiUrl>
api-key = <cloudstackApiKey>
secret-key = <cloudstackSecretKey>

    2. Run the following command to save the above Apache CloudStack connection info into an environment variable, to be used by ./config/default/credentials.yaml and ultimately the generated infrastructure-components.yaml, where it gets passed to CAPC:

      export CLOUDSTACK_B64ENCODED_SECRET=$(base64 -w0 -i cloud-config)

  5. Set the IMG environment variable so that the Makefile knows where to push docker image (if building your own)

    1. export IMG=localhost:5000/cluster-api-provider-capc
    2. make docker-build
    3. make docker-push

  6. Set the source image location so that the CAPC deployment manifest files have the right image path in them in config/default/manager_image_patch.yaml

  7. Generate the CAPC manifests (if building your own) into $RELEASE_DIR

    make build will generate and copy infrastructure-components.yaml and metadata.yaml files to $RELEASE_DIR, which is ./out by default. You may want to override the default value with export RELEASE_DIR=${HOME}/.cluster-api/overrides/infrastructure-cloudstack/<VERSION>/ to deploy the generated manifests for use by clusterctl before running make build.

  8. Generate clusterctl config file so that clusterctl knows how to provision the Apache CloudStack cluster, referencing whatever you set for $RELEASE_DIR from above for the url:

    cat << EOF > ~/.cluster-api/cloudstack.yaml
providers:
- name: "cloudstack"
  type: "InfrastructureProvider"
  url: ${HOME}/.cluster-api/overrides/infrastructure-cloudstack/<VERSION>/infrastructure-components.yaml
EOF

  9. Assure that the required Apache CloudStack resources have been created: zone, pod cluster, and k8s-compatible template, compute offerings defined (2GB+ of RAM for control plane offering with 2vCPU).

Deploying Custom Builds

Initialize the management cluster

Run the following command to turn your cluster into a management cluster and load the Apache CloudStack components into it.

clusterctl init --infrastructure cloudstack --config ~/.cluster-api/cloudstack.yaml

Creating a CAPC Cluster:

  1. Set up the environment variables. It will be populated by the values set here. See the example values below (and replace with your own!)

    The entire list of configuration variables as well as how to fetch them can be found here

    # The Apache CloudStack zone in which the cluster is to be deployed
export CLOUDSTACK_ZONE_NAME=zone1

# If the referenced network doesn't exist, a new isolated network
# will be created.
export CLOUDSTACK_NETWORK_NAME=GuestNet1

# The IP you put here must be available as an unused public IP on the network
# referenced above. If it's not available, the control plane will fail to create.
# You can see the list of available IP's when you try allocating a public
# IP in the network at
# Network -> Guest Networks -> <Network Name> -> IP Addresses
export CLUSTER_ENDPOINT_IP=192.168.1.161

# This is the standard port that the Control Plane process runs on
export CLUSTER_ENDPOINT_PORT=6443

# Machine offerings must be pre-created. Control plane offering
# must have have >2GB RAM available
export CLOUDSTACK_CONTROL_PLANE_MACHINE_OFFERING="Large Instance"
export CLOUDSTACK_WORKER_MACHINE_OFFERING="Small Instance"

# Referring to a prerequisite capi-compatible image you've loaded into Apache CloudStack
export CLOUDSTACK_TEMPLATE_NAME=kube-v1.23.3/ubuntu-2004

# The SSH KeyPair to log into the VM (Optional: you must use clusterctl --flavor *managed-ssh*)
export CLOUDSTACK_SSH_KEY_NAME=CAPCKeyPair6

  2. Generate the CAPC cluster spec yaml file

    clusterctl generate cluster capc-cluster \
    --kubernetes-version v1.23.3 \
    --control-plane-machine-count=1 \
    --worker-machine-count=1 \
    > capc-cluster-spec.yaml

  3. Apply the CAPC cluster spec to your kind management cluster

    kubectl apply -f capc-cluster-spec.yaml

  4. Check the progress of capc-cluster, and wait for all the components (with the exception of MachineDeployment/capc-cluster-md-0) to be ready. (MachineDeployment/capc-cluster-md-0 will not show ready until the CNI is installed.)

    clusterctl describe cluster capc-cluster

  5. Get the generated kubeconfig for your newly created Apache CloudStack cluster capc-cluster

    clusterctl get kubeconfig capc-cluster > capc-cluster.kubeconfig

  6. Install calico on the workload cluster so that pods can see each other

    KUBECONFIG=capc-cluster.kubeconfig kubectl apply -f https://projectcalico.docs.tigera.io/manifests/calico.yaml

  7. Verify the K8s cluster is fully up. (It may take a minute for the nodes status to all reach ready state.)

    1. Run KUBECONFIG=capc-cluster.kubeconfig kubectl get nodes, and observe the following output
    NAME                               STATUS   ROLES                  AGE     VERSION
capc-cluster-control-plane-xsnxt   Ready    control-plane,master   2m56s   v1.20.10
capc-cluster-md-0-9fr9d            Ready    <none>                 112s    v1.20.10

Validating the CAPC Cluster:

Run a simple kubernetes app called ‘test-thing’

  1. Create the container
KUBECONFIG=capc-cluster.kubeconfig kubectl run test-thing --image=rockylinux/rockylinux:8 --restart=Never -- /bin/bash -c 'echo Hello, World!'
KUBECONFIG=capc-cluster.kubeconfig kubectl get pods
  1. Wait for the container to complete, and check the logs for ‘Hello, World!’
KUBECONFIG=capc-cluster.kubeconfig kubectl logs test-thing

kubectl/clusterctl Reference:

  • Pods in capc-cluster -- cluster running in Apache CloudStack
% KUBECONFIG=capc-cluster.kubeconfig kubectl get pods -A
NAMESPACE     NAME                                                       READY   STATUS      RESTARTS   AGE
default       test-thing                                                 0/1     Completed   0          2m43s
kube-system   calico-kube-controllers-784dcb7597-dw42t                   1/1     Running     0          4m31s
kube-system   calico-node-mmp2x                                          1/1     Running     0          4m31s
kube-system   calico-node-vz99f                                          1/1     Running     0          4m31s
kube-system   coredns-74ff55c5b-n6zp7                                    1/1     Running     0          9m18s
kube-system   coredns-74ff55c5b-r8gvj                                    1/1     Running     0          9m18s
kube-system   etcd-capc-cluster-control-plane-tknwx                      1/1     Running     0          9m21s
kube-system   kube-apiserver-capc-cluster-control-plane-tknwx            1/1     Running     0          9m21s
kube-system   kube-controller-manager-capc-cluster-control-plane-tknwx   1/1     Running     0          9m21s
kube-system   kube-proxy-6g9zb                                           1/1     Running     0          9m3s
kube-system   kube-proxy-7gjbv                                           1/1     Running     0          9m18s
kube-system   kube-scheduler-capc-cluster-control-plane-tknwx            1/1     Running     0          9m21s
  • Pods in original kind cluster (also called bootstrap cluster, management cluster)
% kubectl  get pods -A
NAMESPACE                           NAME                                                             READY   STATUS    RESTARTS   AGE
capc-system                         capc-controller-manager-55798f8594-lp2xs                         1/1     Running   0          30m
capi-kubeadm-bootstrap-system       capi-kubeadm-bootstrap-controller-manager-7857cd7bb8-rldnw       1/1     Running   0          30m
capi-kubeadm-control-plane-system   capi-kubeadm-control-plane-controller-manager-6cc4b4d964-tz5zq   1/1     Running   0          30m
capi-system                         capi-controller-manager-7cfcfdf99b-79lr9                         1/1     Running   0          30m
cert-manager                        cert-manager-848f547974-dl7hc                                    1/1     Running   0          31m
cert-manager                        cert-manager-cainjector-54f4cc6b5-gfgsw                          1/1     Running   0          31m
cert-manager                        cert-manager-webhook-7c9588c76-5m2b2                             1/1     Running   0          31m
kube-system                         coredns-558bd4d5db-22zql                                         1/1     Running   0          48m
kube-system                         coredns-558bd4d5db-7g7kh                                         1/1     Running   0          48m
kube-system                         etcd-capi-test-control-plane                                     1/1     Running   0          48m
kube-system                         kindnet-7p2dq                                                    1/1     Running   0          48m
kube-system                         kube-apiserver-capi-test-control-plane                           1/1     Running   0          48m
kube-system                         kube-controller-manager-capi-test-control-plane                  1/1     Running   0          48m
kube-system                         kube-proxy-cwrhv                                                 1/1     Running   0          48m
kube-system                         kube-scheduler-capi-test-control-plane                           1/1     Running   0          48m
local-path-storage                  local-path-provisioner-547f784dff-f2g7r                          1/1     Running   0          48m

This document is to help developers understand how to test CAPC.

Code Origin

The most of the code under test/e2e is from CAPD (Cluster API for Docker) e2e testing (https://github.com/kubernetes-sigs/cluster-api/tree/main/test/e2e) The ACS specific things are under test/e2e/config and test/e2e/data/infrastructure-cloudstack.

e2e

This section describes how to run end-to-end (e2e) testing with CAPC.

Requirements

  • Admin access to a Apache CloudStack (ACS) server
  • The testing must occur on a host that can access the ACS server
  • Docker (download)
  • Kind (download)

Environment variables

The first step to running the e2e tests is setting up the required environment variables:

Environment variableDescriptionDefault Value
CLOUDSTACK_ZONE_NAMEThe zone namezone1
CLOUDSTACK_NETWORK_NAMEThe network name. If not exisiting an isolated network with the name is created.Shared1
CLUSTER_ENDPOINT_IPThe cluster endpoint IP172.16.2.199
CLUSTER_ENDPOINT_IP_2The cluster endpoint IP for a second cluster172.16.2.199
CLOUDSTACK_CONTROL_PLANE_MACHINE_OFFERINGThe machine offering for the control plane VM instancesLarge Instance
CLOUDSTACK_WORKER_MACHINE_OFFERINGThe machine offering for the worker node VM instancesMedium Instance
CLOUDSTACK_TEMPLATE_NAMEThe machine template for both control plane and worke node VM instanceskube-v1.20.10/ubuntu-2004
CLOUDSTACK_SSH_KEY_NAMEThe name of SSH key added to the VM instancesCAPCKeyPair6

Default values for these variables are defined in config/cloudstack.yaml. This cloudstack.yaml can be completely overridden by providing make with the fully qualified path of another cloudstack.yaml via environment variable E2E_CONFIG

You will also have to define a k8s secret in a cloud-config.yaml file in the project root, containing a pointer to and credentials for the CloudStack backend that will be used for the test:

apiVersion: v1
kind: Secret
metadata:
  name: secret1
  namespace: default
type: Opaque
stringData:
  api-key: XXXX
  secret-key: XXXX
  api-url: http://1.2.3.4:8080/client/api
  verify-ssl: "false"

This will be applied to the kind cluster that hosts CAPI/CAPC for the test, allowing CAPC to access the cluster. The api-key and secret-key can be found or generated at Home > Accounts > admin > Users > admin of the ACS management UI. verify-ssl is an optional flag and its default value is true. CAPC skips verifying the host SSL certificates when the flag is set to false.

Running the e2e tests

Run the following command to execute the CAPC e2e tests:

make run-e2e

This command runs all e2e test cases.

You can specify JOB environment variable which value is a regular expression to select test cases to execute. For example, 

JOB=PR-Blocking make run-e2e

This command runs the e2e tests that contains PR-Blocking in their spec names.

Debugging the e2e tests

The E2E tests can be debugged by attaching a debugger to the e2e process after it is launched (i.e., make run-e2e). To facilitate this, the E2E tests can be run with environment variable PAUSE_FOR_DEBUGGER_ATTACH=true. (This is only strictly needed when you want the debugger to break early in the test process, i.e., in SynchronizedBeforeSuite. There’s usually quite enough time to attach if you’re not breaking until your actual test code runs.)

When this environment variable is set to true a 15s pause is inserted at the beginning of the test process (i.e., in the SynchronizedBeforeSuite). The workflow is:

  • Launch the e2e test: PAUSE_FOR_DEBUGGER_ATTACH=true JOB=MyTest make run-e2e
  • Wait for console message: Pausing 15s so you have a chance to attach a debugger to this process...
  • Quickly attach your debugger to the e2e process (i.e., e2e.test)

Releasing Cluster API Provider for CloudStack

Prerequisites:

  1. Please install the following tools :

  2. Set up and log in to gcloud by running gcloud init

    In order to publish any artifact, you need to be a member of the k8s-infra-staging-capi-cloudstack group

Creating only the docker container

If you would just like to build only the docker container and upload it rather than creating a release, you can run the following command :

REGISTRY=<your custom registry> IMAGE_NAME=<your custom image name> TAG=<your custom tag> make docker-build

It defaults to gcr.io/k8s-staging-capi-cloudstack/capi-cloudstack-controller:dev

Creating a new release

Run the following command to create the new release artifacts as well as publish them to the upstream gcr.io repository :

RELEASE_TAG=<your custom tag> make release-staging

Create the necessary release in GitHub along with the following artifacts ( found in the out directory after running the previous command )

  • metadata.yaml
  • infrastructure-components.yaml
  • cluster-template*.yaml