First Cluster - Devops-Notes

Create your first Cluster CAPI

Manual step: ClusterIP

For the moment we don't have LBAAS on Openstack for Api-Servers Workaround: Create a port manualy on prod network on openstack console it will be your CLUSTER_API_IP

Prepare env vars for your cluster.

Manual step: secret cloud.yaml

Based on the file cloud.yaml , create your encoded secret cloud.yaml in base64.

export OPENSTACK_CLOUD_YAML_B64=$(cat cloud.yaml | base64)

# apply the secret in your kind (run once )
envsubst < secret.yaml | kubectl apply -f -

based on env_cos_mutu file create vars file for your cluster and source it:

source env_mutu_svc

Create Calico CRS deployment for your futur clusters:

# create crs
envsubst <  crs/crs-calico.yaml | kubectl apply -f -

Now create your first cluster:

Create cluster command:

# create env_mutu cluster
envsubst <  cluster-template-without-lb.yaml | kubectl apply -f -

When master are available, connect on SSH on one and go on /var/log/cloud-init-output.log. Copy/Past the configuration to configure the kubeconfig file and be able to use kubectl on this master.

mkdir -p $HOME/.kube
sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
sudo chown $(id -u):$(id -g) $HOME/.kube/config

export KUBECONFIG=/etc/kubernetes/admin.conf

** Check your cluster status using clusterctl **:

clusterctl describe cluster dev

NAME                                                    READY  SEVERITY  REASON  SINCE  MESSAGE
Cluster/dev                                             True                     18h
├─ClusterInfrastructure - OpenStackCluster/dev
├─ControlPlane - KubeadmControlPlane/dev-control-plane  True                     18h
│ └─3 Machines...                                       True                     18h    See dev-control-plane-5djm7, dev-control-plane-tgs4l, ...
└─Workers
  └─MachineDeployment/dev-md-0                          True                     18h
    └─6 Machines...                                     True                     18h    See dev-md-0-9bh9b-89mq9, dev-md-0-9bh9b-95k5n, ...

Delete cluster command:

# create env_mutu cluster
envsubst <  cluster-template-kubevip.yaml | kubectl delete -f -

Clean Capi in your Kind:

kubectl delete cluster mycluster -n namespace

clusterctl delete  --core cluster-api -b kubeadm -c kubeadm -i openstack

Upgrade Components:**

clusterctl upgrade plan

clusterctl upgrade apply --contract v1beta1

Notes :

creation d'un autre cluster dans kind

clusterctl generate cluster capi-quickstart --flavor development
--kubernetes-version v1.32.0
--control-plane-machine-count=1
--worker-machine-count=1
--infrastructure docker \

capi-quickstart.yaml