Build an os image on k8s.

tasks/j7s-git-clone.yaml

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+apiVersion: tekton.dev/v1beta1
+kind: Task
+metadata:
+  name: j7s-git-clone
+spec:
+  workspaces:
+  - name: output
+  - name: ssh-directory
+  params:
+  - name: url
+  - name: branch
+  steps:
+  - image: 192.168.1.128:8443/gitssh:latest
+    script: |
+      set -x
+      cp -r $(workspaces.ssh-directory.path) ~/.ssh
+      chmod 700 ~/.ssh
+      chmod -R 400 ~/.ssh/*
+
+      git clone --single-branch --branch $(params.branch) $(params.url) $(workspaces.output.path)

tasks/j7s-os-image-build.yaml

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+apiVersion: tekton.dev/v1beta1
+kind: Task
+metadata:
+  name: j7s-os-image-build
+spec:
+  workspaces:
+  - name: source
+  params:
+  - name: image-name
+  steps:
+  - image: 192.168.1.128:8443/j7s-image-build:latest
+    securityContext:
+      privileged: true
+    script: |
+      set -x
+      sudo chown -R j7s:j7s $(workspaces.source.path)
+      cd $(workspaces.source.path)
+      make $(params.image-name)