ovsdb-mon-ds.yaml

apiVersion: apps/v1
kind: DaemonSet
metadata:
  name: ovsdb-mon-ovs
spec:
  selector:
    matchLabels:
      name: ovsdb-mon-ovs
  template:
    metadata:
      labels:
        name: ovsdb-mon-ovs
    spec:
      tolerations:
        - key: node-role.kubernetes.io/master
          operator: Exists
          effect: NoSchedule
      containers:
        - name: ovsdb-mon
          image: quay.io/pdiak/fedora-ovn:latest
          resources:
            requests:
              memory: "64Mi"
            limits:
              memory: "256Mi"
          imagePullPolicy: IfNotPresent
          env:
            - name: OVS_RUNDIR
              value: "/run/ovn"
          command:
            - /bin/bash
            - -c
            - "set -xe\n
              \ git clone https://github.com/amorenoz/ovsdb-mon\n
              \ pushd ovsdb-mon\n
              \ declare -A ALL_db_schemas=( [\"OVN_Northbound\"]=\"ovnnb_db.sock\" [\"OVN_Southbound\"]=\"ovnsb_db.sock\" [\"Open_vSwitch\"]=\"db.sock\") \n
              \ declare -A db_schemas=( [\"Open_vSwitch\"]=\"db.sock\" ) \n
              \ for k in \"${!db_schemas[@]}\"; do\n
              \   #The following trick makes it work on upstream ovn-kubernetes as it uses different paths, it does nothing on openshift\n
              \   ln -s /run/openvswitch/${db_schemas[${k}]} ${OVS_RUNDIR}/${db_schemas[${k}]} 2> /dev/null || true\n
              \   if [ -e \"${OVS_RUNDIR}/${db_schemas[${k}]}\" ]; then\n
              \     ovsdb-client get-schema \"unix:${OVS_RUNDIR}/${db_schemas[${k}]}\" ${k} > ${k}.schema\n
              \     SCHEMA=${k}.schema make build \n
              \     mv ./bin/ovsdb-mon /usr/local/bin/ovsdb-mon.${k}\n
              \   fi\n
              \ done \n
              \ touch /tmp/build_finished
              \ popd\n
              \ trap : TERM INT; sleep infinity & wait"
          volumeMounts:
            - mountPath: /run/ovn/
              name: run-ovn
            - mountPath: /run/openvswitch/
              name: run-ovs
          readinessProbe:
            exec:
              command:
              - ls
              - /tmp/build_finished
            initialDelaySeconds: 5
      volumes:
        - hostPath:
            path: /run/ovn
            type: ""
          name: run-ovn
        - hostPath:
            path: /run/openvswitch
            type: ""
          name: run-ovs
      hostNetwork: true

Making it use openvswitch schema only, to make it clear that this is a deamonset to be on all nodes (including ones where ovn db is not present)

I love this! Why not add it to the ovsdb-mon repo?

I love this! Why not add it to the ovsdb-mon repo?

Thanks @amorenoz . We totally could, along with some doc on using it. I will take a stab at that.