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Custom Configuration Installation

  1. Run sealos gen to generate a Clusterfile, for example:
$ sealos gen labring/kubernetes:v1.25.0 labring/helm:v3.8.2 labring/calico:v3.24.1 \
   --masters 192.168.0.2,192.168.0.3,192.168.0.4 \
   --nodes 192.168.0.5,192.168.0.6,192.168.0.7 --passwd 'xxx' > Clusterfile

Notice: labring/helm should be set before labring/calico.

The generated Clusterfile is as follows:

Clusterfile
apiVersion: apps.sealos.io/v1beta1
kind: Cluster
metadata:
  creationTimestamp: null
  name: default
spec:
  hosts:
  - ips:
    - 192.168.0.2:22
    - 192.168.0.3:22
    - 192.168.0.4:22
    roles:
    - master
    - amd64
  - ips:
    - 192.168.0.5:22
    - 192.168.0.6:22
    - 192.168.0.7:22
    roles:
    - node
    - amd64
  image:
  - labring/kubernetes:v1.24.0
  - labring/helm:v3.8.2
  - labring/calico:v3.24.1
  ssh:
    passwd: xxx
    pk: /root/.ssh/id_rsa
    port: 22
    user: root
status: {}
  1. After generating the Clusterfile, update the cluster configuration. For example, to modify the CIDR range of pods, you can modify the networking.podSubnet and spec.data.spec.calicoNetwork.ipPools.cidr fields. The final Clusterfile would look like this:
Clusterfile
apiVersion: apps.sealos.io/v1beta1
kind: Cluster
metadata:
  creationTimestamp: null
  name: default
spec:
  hosts:
    - ips:
        - 192.168.0.2:22
        - 192.168.0.3:22
        - 192.168.0.4:22
      roles:
        - master
        - amd64
    - ips:
        - 192.168.0.5:22
        - 192.168.0.6:22
        - 192.168.0.7:22
      roles:
        - node
        - amd64
  image:
    - labring/kubernetes:v1.25.0
    - labring/helm:v3.8.2
    - labring/calico:v3.24.1
  ssh:
    passwd: xxx
    pk: /root/.ssh/id_rsa
    port: 22
    user: root
status: {}
---
apiVersion: kubeadm.k8s.io/v1beta2
kind: ClusterConfiguration
networking:
  podSubnet: 10.160.0.0/12
---
apiVersion: apps.sealos.io/v1beta1
kind: Config
metadata:
  name: calico
spec:
  path: charts/calico/values.yaml
  strategy: merge
  data: |
    installation:
      enabled: true
      kubernetesProvider: ""
      calicoNetwork:
        ipPools:
        - blockSize: 26
          cidr: 10.160.0.0/12
          encapsulation: IPIP
          natOutgoing: Enabled
          nodeSelector: all()
        nodeAddressAutodetectionV4:
          interface: "eth.*|en.*"
  1. Run sealos apply -f Clusterfile to start the cluster. After the cluster is successfully running, the Clusterfile will be saved in the .sealos/default/Clusterfile file. You can modify the fields in it to reapply changes to the cluster.

Note:

  • You can refer to the official documentation or run the kubeadm config print init-defaults command to print the kubeadm configuration.