odo like component on Kubernetes (nodejs)

component.yaml

# Bootstrap odo like component on Kubernetes

---

# PVC where source code is persistented
# This is required to make sure that source is not lost form to container,
# because it is not part of the container image.

apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  labels:
    app.kubernetes.io/name: myapp
  name: nodejs-myapp-s2idata
spec:
  accessModes:
  - ReadWriteOnce
  resources:
    requests:
      storage: 1Gi

---

apiVersion: apps/v1
kind: Deployment
metadata:
  name: nodejs
  labels:
    app.kubernetes.io/name: myapp
spec:
  replicas: 1
  selector:
    matchLabels:
      app.kubernetes.io/name: myapp
  strategy:
    type: Recreate
  template:
    metadata:
      labels:
        app.kubernetes.io/name: myapp
    spec:
      containers:
      - image: centos/nodejs-8-centos7:latest
        name: myapp
        args:
        - /var/lib/supervisord/bin/supervisord
        - -c
        - /var/lib/supervisord/conf/supervisor.conf
        command:
        - /var/lib/supervisord/bin/dumb-init
        - --
        env:
        - name: ODO_S2I_SRC_BIN_PATH
          value: /tmp
        - name: ODO_S2I_DEPLOYMENT_DIR
          value: /opt/app-root/src
        - name: ODO_S2I_WORKING_DIR
          value: /opt/app-root/src
        - name: ODO_S2I_BUILDER_IMG
          value: rhoar-nodejs/nodejs-10
        - name: ODO_DEPLOYMENT_BACKUP_DIR
          value: /opt/app-root/deployment-backup
        - name: ODO_SRC_BACKUP_DIR
          value: /opt/app-root/src-backup
        - name: ODO_S2I_SCRIPTS_URL
          value: /usr/libexec/s2i
        - name: ODO_S2I_SCRIPTS_PROTOCOL
          value: image://
        ports:
        - containerPort: 8080
          name: 8080-tcp
          protocol: TCP
        volumeMounts:
        - mountPath: /var/lib/supervisord
          name: odo-supervisord-shared-data
        - mountPath: /opt/app-root
          name: nodejs-myapp-s2idata
          subPath: app-root
        resources: {}
      initContainers:
      - image: centos/nodejs-8-centos7:latest
        name: copy-files-to-volume
        args:
        - "\nSRC=/opt/app-root\nDEST=/mnt/app-root\n\nif [ -f $DEST/.delete-volume
          ]; then\n    rm -rf $DEST\nfi\n if [ -d $DEST ]; then\n    if [ -f $DEST/.sync-volume
          ]; then\n        if ! [[ \"$JUPYTER_SYNC_VOLUME\" =~ ^(false|no|n|0)$ ]];
          then\n            JUPYTER_SYNC_VOLUME=yes\n        fi\n    fi\n     if [[
          \"$JUPYTER_SYNC_VOLUME\" =~ ^(true|yes|y|1)$ ]]; then\n        rsync -ar
          --ignore-existing $SRC/. $DEST\n    fi\n     exit\nfi\n if [ -d $DEST.setup-volume
          ]; then\n    rm -rf $DEST.setup-volume\nfi\n\nmkdir -p $DEST.setup-volume\ntar
          -C $SRC -cf - . | tar -C $DEST.setup-volume -xvf -\nmv $DEST.setup-volume
          $DEST\n\t\t\t"
        command:
        - sh
        - -c
        volumeMounts:
        - mountPath: /mnt
          name: nodejs-myapp-s2idata
      - image: quay.io/openshiftdo/supervisord:0.6.0
        name: copy-supervisord
        args:
        - -r
        - /opt/supervisord
        - /var/lib/
        command:
        - /usr/bin/cp
        resources: {}
        terminationMessagePath: /dev/termination-log
        terminationMessagePolicy: File
        volumeMounts:
        - mountPath: /var/lib/supervisord
          name: odo-supervisord-shared-data
      volumes:
      - emptyDir: {}
        name: odo-supervisord-shared-data
      - name: nodejs-myapp-s2idata
        persistentVolumeClaim:
          claimName: nodejs-myapp-s2idata

---

apiVersion: v1
kind: Service
metadata:
  name: myapp
  labels:
    app.kubernetes.io/name: myapp
spec:
  ports:
  - name: "8080-tcp"
    port: 8080
    targetPort: "8080-tcp"
    protocol: TCP
  selector:
    app.kubernetes.io/name: myapp
  type: LoadBalancer

create.sh

# initialize component (create PersistentVolumeClaim, Service and Deployment)
kubectl create -f component.yaml

push.sh

# push source code from the current directory the runnig container

# get pod name
export POD=`kubectl get pods -l "app.kubernetes.io/name=myapp" -o jsonpath="{.items[0].metadata.name}"`

# copy source files to pod
# because of https://github.com/kubernetes/kubernetes/issues/66170
for f in `ls -1A`; do kubectl cp $f $POD:/tmp/src/ ; done

# execute assemble-and-restart injected into the volume from initContainer
# This script includes some odo magic to make s2i builder images work with supervisor aproach.
# Than it just executes s2i 'assemble' script and start/restart s2i 'run' script
kubectl exec -it $POD /var/lib/supervisord/bin/assemble-and-restart


# access Service created in component.yaml
# for minikube:
minikube service myapp