ArgoCD Kustomize Plugin Docker KRM

argocd-repo-server-patch.yaml

apiVersion: apps/v1
kind: Deployment
metadata:
  name: argocd-repo-server
spec:
  template:
    spec:
      containers:
        - name: kustomize-docker
          command: [/var/run/argocd/argocd-cmp-server]
          image: your-registry/argocd-podman-plugin
          securityContext:
            privileged: true
            runAsNonRoot: true
            runAsUser: 999
          volumeMounts:
            - mountPath: /var/run/argocd
              name: var-files
            - mountPath: /home/argocd/cmp-server/plugins
              name: plugins
            - mountPath: /tmp
              name: tmp
          env:
            - name: KUSTOMIZE_PLUGIN_HOME
              value: /tmp/docker
            - name: XDG_RUNTIME_DIR
              value: /tmp/docker
            - name: XDG_DATA_HOME
              value: /tmp/docker
            - name: XDG_CONFIG_HOME
              value: /tmp/docker
            - name: TMPDIR
              value: /tmp/docker
      volumes:
        - emptyDir: {}
          name: tmp

Dockerfile

# plugin-image/Dockerfile
FROM alpine:3.19

RUN apk update && apk add --no-cache \
    --repository=http://dl-cdn.alpinelinux.org/alpine/edge/testing \
    kustomize podman

RUN ln -s /usr/bin/podman /usr/bin/docker \
      && adduser -h /home/argocd -s /bin/sh -G ping -u 999 -D argocd \
      && echo 'argocd:165536:65536' >> /etc/subuid \
      && echo 'argocd:165536:65536' >> /etc/subgid

COPY storage.conf /home/argocd/.config/containers/storage.conf
COPY plugin.yaml /home/argocd/cmp-server/config/plugin.yaml

gistfile1.txt

# Example app using plugin
apiVersion: argoproj.io/v1alpha1
kind: Application
metadata:
  name: root-app
  namespace: argocd
spec:
  source:
    repoURL: Your Repo
    targetRevision: main
    path: 'applications'
    plugin:
      name: kustomize-docker-plugin

    # You can't use this while using plugin
    # kustomize:
    # components:
    # - ../../environments/azure-dev/hub/_config
    # - ../../environments/azure-shared-infrastructure/_components-base
  destination:
    server: https://kubernetes.default.svc
    namespace: your-ns

plugin.yaml

# plugin-image/plugin.yaml
apiVersion: argoproj.io/v1alpha1
kind: ConfigManagementPlugin
metadata:
  name: kustomize-docker-plugin
spec:
  discover:
    find:
      command: [sh, -c, find . -name *.yaml]
  generate:
    command: [sh]
    args: [-c, 'kustomize build --enable-alpha-plugins --enable-helm']
  init:
    command: [sh]
    args: [-c, 'echo "Initializing..."']

storage.conf

# plugin-image/storage.conf
[storage]
driver = "overlay"
runroot = "/tmp/docker/run/containers/storage"
graphroot = "/tmp/docker/var/lib/containers/storage"