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Starting a Cluster with sealos apply

sealos apply is an important command in the Sealos command-line tool used to run cluster images in a Kubernetes cluster. This guide provides detailed instructions on how to use the command and its options.

Basic Usage​

The basic usage of the sealos apply command is as follows:

$ sealos apply -f Clusterfile

Clusterfile content:

apiVersion: apps.sealos.io/v1beta1
kind: Cluster
metadata:
  name: default
spec:
  # Server IP addresses and roles
  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

This command will run cluster images in the Kubernetes cluster based on the specified Clusterfile.

Options​

The sealos apply command provides several options to customize its behavior:

  • -f, --Clusterfile='Clusterfile': Specifies the Clusterfile to apply. Defaults to Clusterfile.
  • --config-file=[]: Specifies the path to a custom config file to replace or modify resources.
  • --env=[]: Sets environment variables to be used during command execution.
  • --set=[]: Sets values on the command line, usually for replacing template values.
  • --values=[]: Specifies values files to be applied to the Clusterfile, usually used for templating.

Each option can be followed by one or more parameters. Multiple parameters are separated by commas.

For example, you can use the --set option to set values on the command line:

sealos apply -f Clusterfile --set key1=value1,key2=value2

This command will set the values of key1 and key2 to value1 and value2, and then apply the Clusterfile.

Similarly, you can use the --values option to specify a values file:

sealos apply -f Clusterfile --values values.yaml

This command will apply the Clusterfile based on the values in the values.yaml file.

For more examples, please refer to the Run Cluster section.

That's it for the usage guide of the sealos apply command. We hope this helps you. If you have any questions or encounter any issues during the process, feel free to ask us.