Add Support for OVN octavia provider

* Add OVN support
* Add Octavia Driver Agent service

With this, we're allow to using OVN with Octavia just by adding OVN to
following configs:
* [api_settings]/enabled_provider_drivers
* [driver_agent]/enabled_provider_agents

Change-Id: I735c572fff80793806a9232c86e69059d0eda838

octavia/templates/bin/_octavia-driver-agent.sh.tpl

@@ -0,0 +1,31 @@
+#!/bin/bash
+
+{{/*
+Copyright 2024 Vexxhost Co., Ltd.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+   http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/}}
+
+set -ex
+COMMAND="${@:-start}"
+
+function start () {
+  exec octavia-driver-agent \
+        --config-file /etc/octavia/octavia.conf
+}
+
+function stop () {
+  kill -TERM 1
+}
+
+$COMMAND

octavia/templates/configmap-bin.yaml

@@ -47,6 +47,8 @@ data:
 {{- include "helm-toolkit.scripts.keystone_user" . | indent 4 }}
   octavia-api.sh: |
 {{ tuple "bin/_octavia-api.sh.tpl" . | include "helm-toolkit.utils.template" | indent 4 }}
+  octavia-driver-agent.sh: |
+{{ tuple "bin/_octavia-driver-agent.sh.tpl" . | include "helm-toolkit.utils.template" | indent 4 }}
   octavia-health-manager.sh: |
 {{ tuple "bin/_octavia-health-manager.sh.tpl" . | include "helm-toolkit.utils.template" | indent 4 }}
   octavia-health-manager-nic-init.sh: |

octavia/templates/deployment-api.yaml

@@ -18,6 +18,7 @@ limitations under the License.
 {{- $envAll := . }}
 
 {{- $mounts_octavia_api := .Values.pod.mounts.octavia_api.octavia_api }}
+{{- $mounts_octavia_driver_agent := .Values.pod.mounts.octavia_api.octavia_driver_agent }}
 {{- $mounts_octavia_api_init := .Values.pod.mounts.octavia_api.init_container }}
 
 {{- $serviceAccountName := "octavia-api" }}
@@ -58,8 +59,7 @@ spec:
         - name: octavia-api
 {{ tuple $envAll "octavia_api" | include "helm-toolkit.snippets.image" | indent 10 }}
 {{ tuple $envAll $envAll.Values.pod.resources.api | include "helm-toolkit.snippets.kubernetes_resources" | indent 10 }}
-          securityContext:
-            runAsUser: {{ .Values.pod.user.octavia.uid }}
+{{ dict "envAll" $envAll "application" "octavia_api" "container" "octavia_api" | include "helm-toolkit.snippets.kubernetes_container_security_context" | indent 10 }}
           command:
             - /tmp/octavia-api.sh
             - start
@@ -78,6 +78,8 @@ spec:
               path: /
               port: {{ tuple "load_balancer" "internal" "api" . | include "helm-toolkit.endpoints.endpoint_port_lookup" }}
           volumeMounts:
+            - name: run-openvswitch
+              mountPath: /var/run/ovn
             - name: pod-etc-octavia
               mountPath: /etc/octavia
             - name: octavia-bin
@@ -98,10 +100,54 @@ spec:
               subPath: {{ base .Values.conf.octavia.DEFAULT.log_config_append }}
               readOnly: true
             {{- end }}
+            - name: octavia-driver-agents
+              mountPath: /var/run/octavia
 {{ if $mounts_octavia_api.volumeMounts }}{{ toYaml $mounts_octavia_api.volumeMounts | indent 12 }}{{ end }}
+        - name: octavia-driver-agent
+{{ tuple $envAll "octavia_driver_agent" | include "helm-toolkit.snippets.image" | indent 10 }}
+{{ tuple $envAll $envAll.Values.pod.resources.driver_agent | include "helm-toolkit.snippets.kubernetes_resources" | indent 10 }}
+{{ dict "envAll" $envAll "application" "octavia_api" "container" "octavia_driver_agent" | include "helm-toolkit.snippets.kubernetes_container_security_context" | indent 10 }}
+          command:
+            - /tmp/octavia-driver-agent.sh
+            - start
+          lifecycle:
+            preStop:
+              exec:
+                command:
+                  - /tmp/octavia-driver-agent.sh
+                  - stop
+          volumeMounts:
+            - name: pod-etc-octavia
+              mountPath: /etc/octavia
+              readOnly: true
+            - name: octavia-bin
+              mountPath: /tmp/octavia-driver-agent.sh
+              subPath: octavia-driver-agent.sh
+              readOnly: true
+            - name: octavia-etc
+              mountPath: /etc/octavia/octavia.conf
+              subPath: octavia.conf
+              readOnly: true
+            {{- if .Values.conf.octavia.DEFAULT.log_config_append }}
+            - name: octavia-etc
+              mountPath: {{ .Values.conf.octavia.DEFAULT.log_config_append }}
+              subPath: {{ base .Values.conf.octavia.DEFAULT.log_config_append }}
+              readOnly: true
+            {{- end }}
+            - name: octavia-driver-agents
+              mountPath: /var/run/octavia
+            - name: run-openvswitch
+              mountPath: /var/run/ovn
+{{ if $mounts_octavia_driver_agent.volumeMounts }}{{ toYaml $mounts_octavia_driver_agent.volumeMounts | indent 12 }}{{ end }}
       volumes:
         - name: pod-etc-octavia
           emptyDir: {}
+        - name: run-openvswitch
+          hostPath:
+            path: /run/openvswitch
+            type: DirectoryOrCreate
+        - name: octavia-driver-agents
+          emptyDir: {}
         - name: octavia-bin
           configMap:
             name: octavia-bin

octavia/templates/deployment-housekeeping.yaml

@@ -59,8 +59,7 @@ spec:
         - name: octavia-housekeeping
 {{ tuple $envAll "octavia_housekeeping" | include "helm-toolkit.snippets.image" | indent 10 }}
 {{ tuple $envAll $envAll.Values.pod.resources.housekeeping | include "helm-toolkit.snippets.kubernetes_resources" | indent 10 }}
-          securityContext:
-            runAsUser: {{ .Values.pod.user.octavia.uid }}
+{{ dict "envAll" $envAll "application" "octavia_housekeeping" "container" "octavia_housekeeping" | include "helm-toolkit.snippets.kubernetes_container_security_context" | indent 10 }}
           command:
             - /tmp/octavia-housekeeping.sh
             - start

octavia/templates/deployment-worker.yaml

@@ -59,8 +59,7 @@ spec:
         - name: octavia-worker
 {{ tuple $envAll "octavia_worker" | include "helm-toolkit.snippets.image" | indent 10 }}
 {{ tuple $envAll $envAll.Values.pod.resources.worker | include "helm-toolkit.snippets.kubernetes_resources" | indent 10 }}
-          securityContext:
-            runAsUser: {{ .Values.pod.user.octavia.uid }}
+{{ dict "envAll" $envAll "application" "octavia_worker" "container" "octavia_worker" | include "helm-toolkit.snippets.kubernetes_container_security_context" | indent 10 }}
           command:
             - /tmp/octavia-worker.sh
             - start
@@ -100,4 +99,4 @@ spec:
             secretName: octavia-etc
             defaultMode: 0444
 {{ if $mounts_octavia_worker.volumes }}{{ toYaml $mounts_octavia_worker.volumes | indent 8 }}{{ end }}
-{{- end }}
+{{- end }}

octavia/values.yaml

@@ -51,6 +51,7 @@ images:
     dep_check: quay.io/airshipit/kubernetes-entrypoint:latest-ubuntu_focal
     image_repo_sync: docker.io/docker:17.07.0
     octavia_api: docker.io/loci/octavia:master-ubuntu
+    octavia_driver_agent: docker.io/loci/octavia:master-ubuntu
     octavia_worker: docker.io/loci/octavia:master-ubuntu
     octavia_housekeeping: docker.io/loci/octavia:master-ubuntu
     octavia_health_manager: docker.io/loci/octavia:master-ubuntu
@@ -208,6 +209,9 @@ conf:
   octavia:
     DEFAULT:
       log_config_append: /etc/octavia/logging.conf
+    ovn:
+      ovn_nb_connection: unix:/run/ovn/ovnnb_db.sock
+      ovn_sb_connection: unix:/run/ovn/ovnsb_db.sock
     api_settings:
       api_handler: queue_producer
       bind_host: 0.0.0.0
@@ -521,9 +525,25 @@ endpoints:
         public: 80
 
 pod:
-  user:
-    octavia:
-      uid: 42424
+  security_context:
+    octavia_api:
+      container:
+        octavia_api:
+          capabilities:
+            add:
+              - SYS_NICE
+        octavia_driver_agent:
+          capabilities:
+            add:
+              - SYS_NICE
+    octavia_worker:
+      container:
+        octavia_worker:
+          runAsUser: 42424
+    octavia_housekeeping:
+      container:
+        octavia_housekeeping:
+          runAsUser: 42424
   affinity:
     anti:
       type:
@@ -536,6 +556,9 @@ pod:
       octavia_api:
         volumeMounts:
         volumes:
+      octavia_driver_agent:
+        volumeMounts:
+        volumes:
     octavia_worker:
       init_container: null
       octavia_worker:
@@ -589,6 +612,13 @@ pod:
       limits:
         memory: "1024Mi"
         cpu: "2000m"
+    driver_agent:
+      requests:
+        memory: "128Mi"
+        cpu: "100m"
+      limits:
+        memory: "1024Mi"
+        cpu: "2000m"
     worker:
       requests:
         memory: "128Mi"