Chapter 1. Using Kustomize manifests to deploy applications

Procedure

1. Override the list of default paths by inserting your own values and running one of the following commands:

   1. Set manifests.kustomizePaths to <"/opt/alternate/path"> in the configuration file for a single path.

   2. Set kustomizePaths to ,"/opt/alternative/path.d/*". in the configuration file for a glob pattern.

      manifests:
          kustomizePaths:
              - <location>

      Replace <location> with the path to the manifest directory. Set each location entry to an exact path by using "/opt/alternate/path" or a glob pattern by using "/opt/alternative/path.d/*".

2. To disable loading manifests, set the configuration option to an empty list.

   manifests:
       kustomizePaths: []

   Note

   The configuration file overrides the defaults entirely. If the kustomizePaths value is set, only the values in the configuration file are used. Setting the value to an empty list disables manifest loading.

Procedure

1. Create the BusyBox manifest files by running the following commands:

   1. Define the directory location:

      $ MANIFEST_DIR=/etc/microshift/manifests

   2. Make the directory:

      $ sudo mkdir -p ${MANIFEST_DIR}

   3. Place the YAML file in the directory:

      sudo tee ${MANIFEST_DIR}/busybox.yaml &>/dev/null <<EOF
      apiVersion: v1
      kind: Namespace
      metadata:
        name: busybox
      ---
      apiVersion: apps/v1
      kind: Deployment
      metadata:
        name: busybox
        namespace: busybox-deployment
      spec:
        selector:
          matchLabels:
            app: busybox
        template:
          metadata:
            labels:
              app: busybox
          spec:
            containers:
            - name: busybox
              image: BUSYBOX_IMAGE
              command: [ "/bin/sh", "-c", "while true ; do date; sleep 3600; done;" ]
      EOF

2. Next, create the kustomize manifest files by running the following commands:

   1. Place the YAML file in the directory:

      sudo tee ${MANIFEST_DIR}/kustomization.yaml &>/dev/null <<EOF
      apiVersion: kustomize.config.k8s.io/v1beta1
      kind: Kustomization
      namespace: busybox
      resources:
        - busybox.yaml
      images:
        - name: BUSYBOX_IMAGE
          newName: busybox:1.35
      EOF

3. Restart MicroShift to apply the manifests by running the following command:

   $ sudo systemctl restart microshift

4. Apply the manifests and start the busybox pod by running the following command:

   $ oc get pods -n busybox