From: Author Name <kuralamudhan.ramakrishnan@intel.com>
Date: Mon, 2 Mar 2020 04:34:42 +0000 (+0000)
Subject: Adding the ovn containerization
X-Git-Url: https://gerrit.opnfv.org/gerrit/gitweb?a=commitdiff_plain;ds=sidebyside;h=7f01772cdf3916026a93e9e9ac5ce54d57401476;p=ovn4nfv-k8s-plugin.git

Adding the ovn containerization

Referred multiple works on ovs and ovn
ovs: https://github.com/openvswitch/ovs/tree/master/utilities/docker
ovn: https://github.com/ovn-org/ovn/tree/master/utilities/docker
ovn-kubernetes: https://github.com/ovn-org/ovn-kubernetes/tree/master/dist/images
kube-ovn:https://github.com/alauda/kube-ovn/tree/master/dist/images

Co-authored-by: Aliasgar Ginwala <aginwala@ebay.com>
Signed-off-by: Kuralamudhan Ramakrishnan <kuralamudhan.ramakrishnan@intel.com>
Change-Id: I3aee1a9f4ebce702ca22ec2ecba35463523af892
---

diff --git a/build/bin/entrypoint b/build/bin/entrypoint
index 77084a3..c9646a0 100755
--- a/build/bin/entrypoint
+++ b/build/bin/entrypoint
@@ -1,32 +1,101 @@
-#!/bin/sh -e
+#!/bin/bash
+set -e
+CNI_VERSION=${CNI_VERSION:-"v0.8.5"}
+IMAGE_ARC=${IMAGE_ARC:-"amd64"}
+
+create_kubeconfig() {
+    # Make a ovn4nfv.d directory (for our kubeconfig)
+    # Inspired from t.ly/Xgbbe
+    mkdir -p $CNI_CONF_DIR/ovn4nfv-k8s.d
+    OVN4NFV_KUBECONFIG=$CNI_CONF_DIR/ovn4nfv-k8s.d/ovn4nfv-k8s.kubeconfig
+    SERVICE_ACCOUNT_PATH=/var/run/secrets/kubernetes.io/serviceaccount
+    KUBE_CA_FILE=${KUBE_CA_FILE:-$SERVICE_ACCOUNT_PATH/ca.crt}
+    SERVICEACCOUNT_TOKEN=$(cat $SERVICE_ACCOUNT_PATH/token)
+    SKIP_TLS_VERIFY=${SKIP_TLS_VERIFY:-false}
+
+    # Check if we're running as a k8s pod.
+    if [ -f "$SERVICE_ACCOUNT_PATH/token" ]; then
+        # We're running as a k8d pod - expect some variables.
+        if [ -z ${KUBERNETES_SERVICE_HOST} ]; then
+            error "KUBERNETES_SERVICE_HOST not set"; exit 1;
+        fi
+        if [ -z ${KUBERNETES_SERVICE_PORT} ]; then
+            error "KUBERNETES_SERVICE_PORT not set"; exit 1;
+        fi
+
+        if [ "$SKIP_TLS_VERIFY" == "true" ]; then
+            TLS_CFG="insecure-skip-tls-verify: true"
+        elif [ -f "$KUBE_CA_FILE" ]; then
+            TLS_CFG="certificate-authority-data: $(cat $KUBE_CA_FILE | base64 | tr -d '\n')"
+        fi
+
+        # Write a kubeconfig file for the CNI plugin.  Do this
+        # to skip TLS verification for now.  We should eventually support
+        # writing more complete kubeconfig files. This is only used
+        # if the provided CNI network config references it.
+        touch $OVN4NFV_KUBECONFIG
+        chmod ${KUBECONFIG_MODE:-600} $OVN4NFV_KUBECONFIG
+        cat > $OVN4NFV_KUBECONFIG <<EOF
+# Kubeconfig file for OVN4NFV-K8S CNI plugin.
+apiVersion: v1
+kind: Config
+clusters:
+- name: local
+  cluster:
+    server: ${KUBERNETES_SERVICE_PROTOCOL:-https}://[${KUBERNETES_SERVICE_HOST}]:${KUBERNETES_SERVICE_PORT}
+    $TLS_CFG
+users:
+- name: ovn4nfv
+  user:
+    token: "${SERVICEACCOUNT_TOKEN}"
+contexts:
+- name: ovn4nfv-context
+  context:
+    cluster: local
+    user: ovn4nfv
+current-context: ovn4nfv-context
+EOF
+    else
+        warn "Doesn't look like we're running in a kubernetes environment (no serviceaccount token)"
+    fi
+}
+
+install_cni_plugins() {
+    curl --insecure --compressed -O -L https://github.com/containernetworking/plugins/releases/download/$CNI_VERSION/cni-plugins-linux-$IMAGE_ARC-$CNI_VERSION.tgz
+    tar -zxvf cni-plugins-linux-$IMAGE_ARC-$CNI_VERSION.tgz -C $CNI_BIN_DIR
+    rm -rf cni-plugins-linux-$IMAGE_ARC-$CNI_VERSION.tgz
+}
 
 cmd=${1:-""}
 
 case ${cmd} in
-   "cni")
-      CNI_BIN_DIR="/host/opt/cni/bin"
-      OVN4NFV_CONF_DIR="/host/etc/openvswitch"
-      OVN4NFV_BIN_FILE="/usr/local/bin/ovn4nfvk8s-cni"
-      OVN4NFV_CONF_FILE="/tmp/ovn4nfv-conf/ovn4nfv_k8s.conf"
-      cp -f $OVN4NFV_BIN_FILE $CNI_BIN_DIR
-      cp -f $OVN4NFV_CONF_FILE $OVN4NFV_CONF_DIR
-      # Sleep forever.
-      sleep infinity
-      ;;
+    "cni")
+        CNI_BIN_DIR="/host/opt/cni/bin"
+        OVN4NFV_CONF_DIR="/host/etc/openvswitch"
+        OVN4NFV_BIN_FILE="/usr/local/bin/ovn4nfvk8s-cni"
+        OVN4NFV_CONF_FILE="/tmp/ovn4nfv-conf/ovn4nfv_k8s.conf"
+        OVN4NFV_NET_CONF_FILE="/tmp/ovn4nfv-cni/00-network.conf"
+        CNI_CONF_DIR="/host/etc/cni/net.d"
+
+        cp -f $OVN4NFV_BIN_FILE $CNI_BIN_DIR
+        cp -f $OVN4NFV_CONF_FILE $OVN4NFV_CONF_DIR
+        cp -f $OVN4NFV_NET_CONF_FILE $CNI_CONF_DIR
+        create_kubeconfig
+        install_cni_plugins
+        # Sleep forever.
+        sleep infinity
+    ;;
 
     "operator")
-      shift
-      exec ${OPERATOR} $@
-      ;;
+        shift
+        exec ${OPERATOR} $@
+    ;;
 
     "agent")
-      shift
-      exec ${AGENT} $@
-      ;;
-
-
+        shift
+        exec ${AGENT} $@
+    ;;
     *)
-      echo "invalid command ${cmd}"
-
+        echo "invalid command ${cmd}"
 esac
 
diff --git a/deploy/ovn-daemonset.yaml b/deploy/ovn-daemonset.yaml
new file mode 100644
index 0000000..bb64d84
--- /dev/null
+++ b/deploy/ovn-daemonset.yaml
@@ -0,0 +1,239 @@
+---
+kind: Service
+apiVersion: v1
+metadata:
+  name: ovn-nb-tcp
+  namespace: kube-system
+spec:
+  ports:
+    - name: ovn-nb-tcp
+      protocol: TCP
+      port: 6641
+      targetPort: 6641
+  type: ClusterIP
+  selector:
+    app: ovn-control-plane
+  sessionAffinity: None
+
+---
+kind: Service
+apiVersion: v1
+metadata:
+  name: ovn-sb-tcp
+  namespace: kube-system
+spec:
+  ports:
+    - name: ovn-sb-tcp
+      protocol: TCP
+      port: 6642
+      targetPort: 6642
+  type: ClusterIP
+  selector:
+    app: ovn-control-plane
+  sessionAffinity: None
+
+---
+kind: Deployment
+apiVersion: apps/v1
+metadata:
+  name: ovn-control-plane
+  namespace: kube-system
+  annotations:
+    kubernetes.io/description: |
+      OVN control plane deployment using tcp: ovn-northd-tcp, ovn-nb-tcp and ovn-sb-tcp.
+spec:
+  replicas: 1
+  strategy:
+    rollingUpdate:
+      maxSurge: 0%
+      maxUnavailable: 100%
+    type: RollingUpdate
+  selector:
+    matchLabels:
+      app: ovn-control-plane
+  template:
+    metadata:
+      labels:
+        app: ovn-control-plane
+    spec:
+      tolerations:
+      - operator: Exists
+        effect: NoSchedule
+      affinity:
+        podAntiAffinity:
+          requiredDuringSchedulingIgnoredDuringExecution:
+            - labelSelector:
+                matchLabels:
+                  app: ovn-control-plane
+              topologyKey: kubernetes.io/hostname
+      priorityClassName: system-cluster-critical
+      hostNetwork: true
+      containers:
+        - name: ovn-control-plane
+          image: integratedcloudnative/ovn-images:master
+          imagePullPolicy: "IfNotPresent"
+          command: ["ovn4nfv-k8s", "start_ovn_control_plane"]
+          securityContext:
+            capabilities:
+              add: ["SYS_NICE"]
+          env:
+            - name: POD_IP
+              valueFrom:
+                fieldRef:
+                  fieldPath: status.podIP
+            - name: POD_NAME
+              valueFrom:
+                fieldRef:
+                  fieldPath: metadata.name
+            - name: POD_NAMESPACE
+              valueFrom:
+                fieldRef:
+                  fieldPath: metadata.namespace
+          resources:
+            requests:
+              cpu: 500m
+              memory: 300Mi
+          volumeMounts:
+            - mountPath: /var/run/openvswitch
+              name: host-run-ovs
+            - mountPath: /var/run/ovn
+              name: host-run-ovn
+            - mountPath: /sys
+              name: host-sys
+              readOnly: true
+            - mountPath: /etc/openvswitch
+              name: host-config-openvswitch
+            - mountPath: /var/log/openvswitch
+              name: host-log-ovs
+            - mountPath: /var/log/ovn
+              name: host-log-ovn
+          readinessProbe:
+            exec:
+              command: ["ovn4nfv-k8s", "check_ovn_control_plane"]
+            periodSeconds: 3
+          livenessProbe:
+            exec: 
+              command: ["ovn4nfv-k8s", "check_ovn_control_plane"]
+            initialDelaySeconds: 30
+            periodSeconds: 7
+            failureThreshold: 5
+      nodeSelector:
+        beta.kubernetes.io/os: "linux"
+        ovn4nfv-k8s-plugin: ovn-control-plane
+      volumes:
+        - name: host-run-ovs
+          hostPath:
+            path: /run/openvswitch
+        - name: host-run-ovn
+          hostPath:
+            path: /run/ovn
+        - name: host-sys
+          hostPath:
+            path: /sys
+        - name: host-config-openvswitch
+          hostPath:
+            path: /etc/origin/openvswitch
+        - name: host-log-ovs
+          hostPath:
+            path: /var/log/openvswitch
+        - name: host-log-ovn
+          hostPath:
+            path: /var/log/ovn
+
+---
+kind: DaemonSet
+apiVersion: apps/v1
+metadata:
+  name: ovn-controller
+  namespace: kube-system
+  annotations:
+    kubernetes.io/description: |
+      OVN controller: Start ovsdb-server & ovs-vswitchd components, and ovn controller
+spec:
+  selector:
+    matchLabels:
+      app: ovn-controller
+  updateStrategy:
+    type: OnDelete
+  template:
+    metadata:
+      labels:
+        app: ovn-controller 
+    spec:
+      tolerations:
+      - operator: Exists
+        effect: NoSchedule
+      priorityClassName: system-cluster-critical
+      hostNetwork: true
+      hostPID: true
+      containers:
+        - name: ovn-controller
+          image: integratedcloudnative/ovn-images:master
+          imagePullPolicy: IfNotPresent
+          command: ["ovn4nfv-k8s", "start_ovn_controller"]
+          securityContext:
+            runAsUser: 0
+            privileged: true
+          env:
+            - name: POD_IP
+              valueFrom:
+                fieldRef:
+                  fieldPath: status.podIP
+          volumeMounts:
+            - mountPath: /lib/modules
+              name: host-modules
+              readOnly: true
+            - mountPath: /var/run/openvswitch
+              name: host-run-ovs
+            - mountPath: /var/run/ovn
+              name: host-run-ovn
+            - mountPath: /sys
+              name: host-sys
+              readOnly: true
+            - mountPath: /etc/openvswitch
+              name: host-config-openvswitch
+            - mountPath: /var/log/openvswitch
+              name: host-log-ovs
+            - mountPath: /var/log/ovn
+              name: host-log-ovn
+          readinessProbe:
+            exec:
+              command: ["ovn4nfv-k8s", "check_ovn_controller"]
+            periodSeconds: 5
+          livenessProbe:
+            exec:
+              command: ["ovn4nfv-k8s", "check_ovn_controller"]
+            initialDelaySeconds: 10
+            periodSeconds: 5
+            failureThreshold: 5
+          resources:
+            requests:
+              cpu: 200m
+              memory: 300Mi
+            limits:
+              cpu: 1000m
+              memory: 800Mi
+      nodeSelector:
+        beta.kubernetes.io/os: "linux"
+      volumes:
+        - name: host-modules
+          hostPath:
+            path: /lib/modules
+        - name: host-run-ovs
+          hostPath:
+            path: /run/openvswitch
+        - name: host-run-ovn
+          hostPath:
+            path: /run/ovn
+        - name: host-sys
+          hostPath:
+            path: /sys
+        - name: host-config-openvswitch
+          hostPath:
+            path: /etc/origin/openvswitch
+        - name: host-log-ovs
+          hostPath:
+            path: /var/log/openvswitch
+        - name: host-log-ovn
+          hostPath:
+            path: /var/log/ovn
diff --git a/utilities/docker/debian/Dockerfile b/utilities/docker/debian/Dockerfile
new file mode 100644
index 0000000..674ee7e
--- /dev/null
+++ b/utilities/docker/debian/Dockerfile
@@ -0,0 +1,40 @@
+FROM ubuntu:18.04 as base
+
+USER root
+
+RUN apt-get update && apt-get install -y iproute2 curl software-properties-common setpriv dpkg-dev netcat
+
+RUN mkdir -p /opt/ovn4nfv-k8s-plugin/dist/ubuntu/deb
+RUN bash -xc "\
+pushd /opt/ovn4nfv-k8s-plugin/dist/ubuntu/deb; \
+curl --insecure --compressed -O -L https://github.com/akraino-icn/ovs/releases/download/v2.12.0/libopenvswitch-dev_2.12.0-1_amd64.deb; \
+curl --insecure --compressed -O -L https://github.com/akraino-icn/ovs/releases/download/v2.12.0/libopenvswitch_2.12.0-1_amd64.deb; \
+curl --insecure --compressed -O -L https://github.com/akraino-icn/ovs/releases/download/v2.12.0/openvswitch-common_2.12.0-1_amd64.deb; \
+curl --insecure --compressed -O -L https://github.com/akraino-icn/ovs/releases/download/v2.12.0/openvswitch-datapath-dkms_2.12.0-1_all.deb; \
+curl --insecure --compressed -O -L https://github.com/akraino-icn/ovs/releases/download/v2.12.0/openvswitch-datapath-source_2.12.0-1_all.deb; \
+curl --insecure --compressed -O -L https://github.com/akraino-icn/ovs/releases/download/v2.12.0/openvswitch-dbg_2.12.0-1_amd64.deb; \
+curl --insecure --compressed -O -L https://github.com/akraino-icn/ovs/releases/download/v2.12.0/openvswitch-ipsec_2.12.0-1_amd64.deb; \
+curl --insecure --compressed -O -L https://github.com/akraino-icn/ovs/releases/download/v2.12.0/openvswitch-pki_2.12.0-1_all.deb; \
+curl --insecure --compressed -O -L https://github.com/akraino-icn/ovs/releases/download/v2.12.0/openvswitch-switch_2.12.0-1_amd64.deb; \
+curl --insecure --compressed -O -L https://github.com/akraino-icn/ovs/releases/download/v2.12.0/openvswitch-testcontroller_2.12.0-1_amd64.deb; \
+curl --insecure --compressed -O -L https://github.com/akraino-icn/ovs/releases/download/v2.12.0/openvswitch-test_2.12.0-1_all.deb; \
+curl --insecure --compressed -O -L https://github.com/akraino-icn/ovs/releases/download/v2.12.0/openvswitch-vtep_2.12.0-1_amd64.deb; \
+curl --insecure --compressed -O -L https://github.com/akraino-icn/ovs/releases/download/v2.12.0/ovn-central_2.12.0-1_amd64.deb; \
+curl --insecure --compressed -O -L https://github.com/akraino-icn/ovs/releases/download/v2.12.0/ovn-common_2.12.0-1_amd64.deb; \
+curl --insecure --compressed -O -L https://github.com/akraino-icn/ovs/releases/download/v2.12.0/ovn-controller-vtep_2.12.0-1_amd64.deb; \
+curl --insecure --compressed -O -L https://github.com/akraino-icn/ovs/releases/download/v2.12.0/ovn-docker_2.12.0-1_amd64.deb; \
+curl --insecure --compressed -O -L https://github.com/akraino-icn/ovs/releases/download/v2.12.0/ovn-host_2.12.0-1_amd64.deb; \
+curl --insecure --compressed -O -L https://github.com/akraino-icn/ovs/releases/download/v2.12.0/python-openvswitch_2.12.0-1_all.deb; \
+dpkg-scanpackages . | gzip -c9  > Packages.gz; \
+popd; \
+"
+RUN ls -lt /opt/ovn4nfv-k8s-plugin/dist/ubuntu/deb
+RUN echo "deb [trusted=yes] file:///opt/ovn4nfv-k8s-plugin/dist/ubuntu/deb ./" | tee -a /etc/apt/sources.list > /dev/null
+RUN apt-get update
+RUN apt-get install -y openvswitch-switch=2.12.0-1 openvswitch-common=2.12.0-1 ovn-central=2.12.0-1 ovn-common=2.12.0-1 ovn-host=2.12.0-1
+RUN mkdir -p /var/run/openvswitch && \
+    mkdir -p /var/run/ovn
+
+COPY ovn4nfv-k8s.sh /usr/local/bin/ovn4nfv-k8s
+
+ENTRYPOINT ["ovn4nfv-k8s"]
diff --git a/utilities/docker/debian/ovn4nfv-k8s.sh b/utilities/docker/debian/ovn4nfv-k8s.sh
new file mode 100755
index 0000000..ee60e2b
--- /dev/null
+++ b/utilities/docker/debian/ovn4nfv-k8s.sh
@@ -0,0 +1,158 @@
+#!/usr/bin/env bash
+OVS_RUNDIR=/var/run/openvswitch
+OVS_LOGDIR=/var/log/openvswitch
+
+DB_NB_ADDR=${DB_NB_ADDR:-::}
+DB_NB_PORT=${DB_NB_PORT:-6641}
+DB_SB_ADDR=${DB_SB_ADDR:-::}
+DB_SB_PORT=${DB_SB_PORT:-6642}
+cmd=${1:-""}
+
+if [[ -f /usr/bin/ovn-appctl ]] ; then
+    # ovn-appctl is present. Use new ovn run dir path.
+    OVN_RUNDIR=/var/run/ovn
+    OVNCTL_PATH=/usr/share/ovn/scripts/ovn-ctl
+    OVN_LOGDIR=/var/log/ovn
+    OVN_ETCDIR=/etc/ovn
+else
+    # ovn-appctl is not present. Use openvswitch run dir path.
+    OVN_RUNDIR=/var/run/openvswitch
+    OVNCTL_PATH=/usr/share/openvswitch/scripts/ovn-ctl
+    OVN_LOGDIR=/var/log/openvswitch
+    OVN_ETCDIR=/etc/openvswitch
+fi
+
+check_ovn_control_plane() {
+    /usr/share/ovn/scripts/ovn-ctl status_northd
+    /usr/share/ovn/scripts/ovn-ctl status_ovnnb
+    /usr/share/ovn/scripts/ovn-ctl status_ovnsb
+}
+
+check_ovn_controller() {
+    /usr/share/ovn/scripts/ovn-ctl status_controller
+}
+
+# wait for ovn-sb ready
+wait_ovn_sb() {
+    if [[ -z "${OVN_SB_TCP_SERVICE_HOST}" ]]; then
+        echo "env OVN_SB_SERVICE_HOST not exists"
+        exit 1
+    fi
+    if [[ -z "${OVN_SB_TCP_SERVICE_PORT}" ]]; then
+        echo "env OVN_SB_SERVICE_PORT not exists"
+        exit 1
+    fi
+    while ! nc -z "${OVN_SB_TCP_SERVICE_HOST}" "${OVN_SB_TCP_SERVICE_PORT}" </dev/null;
+    do
+        echo "sleep 10 seconds, waiting for ovn-sb ${OVN_SB_TCP_SERVICE_HOST}:${OVN_SB_TCP_SERVICE_PORT} ready "
+        sleep 10;
+    done
+}
+
+start_ovs_vswitch() {
+    wait_ovn_sb
+    function quit {
+	/usr/share/openvswitch/scripts/ovs-ctl stop
+	/usr/share/openvswitch/scripts/ovn-ctl stop_controller
+	exit 0
+    }
+    trap quit EXIT
+    /usr/share/openvswitch/scripts/ovs-ctl restart --no-ovs-vswitchd --system-id=random
+    # Restrict the number of pthreads ovs-vswitchd creates to reduce the
+    # amount of RSS it uses on hosts with many cores
+    # https://bugzilla.redhat.com/show_bug.cgi?id=1571379
+    # https://bugzilla.redhat.com/show_bug.cgi?id=1572797
+    if [[ `nproc` -gt 12 ]]; then
+        ovs-vsctl --no-wait set Open_vSwitch . other_config:n-revalidator-threads=4
+        ovs-vsctl --no-wait set Open_vSwitch . other_config:n-handler-threads=10
+    fi
+
+    # Start ovsdb
+    /usr/share/openvswitch/scripts/ovs-ctl restart --no-ovsdb-server  --system-id=random
+    /usr/share/openvswitch/scripts/ovs-ctl --protocol=udp --dport=6081 enable-protocol
+    
+}
+
+#cleanup_ovs_server() {
+#}
+
+#cleanup_ovs_controller() {
+#}
+
+function get_default_inteface_ipaddress {
+    local _ip=$1
+    local _default_interface=$(awk '$2 == 00000000 { print $1 }' /proc/net/route)
+    local _ipv4address=$(ip addr show dev $_default_interface | awk '$1 == "inet" { sub("/.*", "", $2); print $2 }')
+    eval $_ip="'$_ipv4address'"
+}
+
+start_ovn_control_plane() {
+    function quit {
+        /usr/share/openvswitch/scripts/ovn-ctl stop_northd
+         exit 0
+    }
+    trap quit EXIT
+    /usr/share/openvswitch/scripts/ovn-ctl restart_northd
+    ovn-nbctl set-connection ptcp:"${DB_NB_PORT}":["${DB_NB_ADDR}"]
+    ovn-nbctl set Connection . inactivity_probe=0
+    ovn-sbctl set-connection ptcp:"${DB_SB_PORT}":["${DB_SB_ADDR}"]
+    ovn-sbctl set Connection . inactivity_probe=0
+    tail -f /var/log/openvswitch/ovn-northd.log
+}
+
+start_ovn_controller() {
+    function quit {
+	/usr/share/openvswitch/scripts/ovn-ctl stop_controller
+	exit 0
+    }
+    trap quit EXIT
+    wait_ovn_sb
+    get_default_inteface_ipaddress node_ipv4_address
+    /usr/share/openvswitch/scripts/ovn-ctl restart_controller
+    # Set remote ovn-sb for ovn-controller to connect to
+    ovs-vsctl set open . external-ids:ovn-remote=tcp:"${OVN_SB_TCP_SERVICE_HOST}":"${OVN_SB_TCP_SERVICE_PORT}"
+    ovs-vsctl set open . external-ids:ovn-remote-probe-interval=10000
+    ovs-vsctl set open . external-ids:ovn-openflow-probe-interval=180
+    ovs-vsctl set open . external-ids:ovn-encap-type=geneve
+    ovs-vsctl set open . external-ids:ovn-encap-ip=$node_ipv4_address
+    tail -f /var/log/openvswitch/ovn-controller.log
+}
+
+set_nbclt() {
+    wait_ovn_sb
+    ovn-nbctl --db=tcp:["${OVN_NB_TCP_SERVICE_HOST}"]:"${OVN_NB_TCP_SERVICE_PORT}" --pidfile --detach --overwrite-pidfile
+}
+
+check_ovs_vswitch() {
+    /usr/share/openvswitch/scripts/ovs-ctl status
+}
+
+case ${cmd} in
+  "start_ovn_control_plane")
+        start_ovn_control_plane
+    ;;
+  "check_ovn_control_plane")
+        check_ovn_control_plane
+    ;;
+  "start_ovn_controller")
+        start_ovs_vswitch
+        set_nbclt
+        start_ovn_controller 
+    ;;
+  "check_ovs_vswitch")
+        check_ovs_vswitch
+    ;;
+  "check_ovn_controller")
+        check_ovs_vswitch
+        check_ovn_controller
+    ;;
+  "cleanup_ovs_controller")
+        cleanup_ovs_controller
+    ;;
+  *)
+    echo "invalid command ${cmd}"
+    echo "valid commands: start-ovn-control-plane check_ovn_control_plane start-ovs-vswitch"
+    exit 0
+esac
+
+exit 0