Advanced Installations

Advanced Installation Examples¶

When creating the agent.iso using the agent-based installer, you can furthur customize your clusters deployment by editing/adding additional manifests.

GitOps ZTP Manifests¶

Docs

Note

GitOps ZTP manifests can be generated with or without configuring the install-config.yaml and agent-config.yaml files beforehand. If you chose to configure the install-config.yaml and agent-config.yaml files, the configurations will be imported to the ZTP cluster manifests when they are generated.

Before building the ISO, create the cluster manifests by running:

openshift-install agent create cluster-manifests --dir <installation_directory>

Now, if you navigate to the installation directory, you can edit the cluster-manifests directly
```
cd <installation_directory>/cluster-manifests
```

GitOps ZTP: Set masters/control-plane to be schedulable¶

Edit the <installation_directory>/cluster-manifests/agent-cluster-install.yaml and set:
```
mastersSchedulable: true
```

Now you can create the agent.iso

openshift-install agent create image --dir <installation_directory>

If this needs to be reverted, you can patch the master nodes after the cluster is built and running:

oc patch schedulers.config.openshift.io cluster --type merge --patch '{"spec": {"mastersSchedulable": false}}'