Use my.cnf from config-data instead of subpath mount

Fixed a potential race condition in the octavia amphora controllers,
config-data is only mounted in the init container and my.cnf is mounted
as a subpath of the config-data mount in the "main" container. It may
trigger some errors because the config-data is unmounted when kubernetes
tries to mount the subpath.
Copy my.cnf from the config-data-merged mount, using the json config
file.

JIRA: OSPRH-9128

pkg/octavia/volumes.go

@@ -92,11 +92,5 @@ func GetVolumeMounts(serviceName string) []corev1.VolumeMount {
 			SubPath:   serviceName + "-config.json",
 			ReadOnly:  true,
 		},
-		{
-			Name:      "config-data",
-			MountPath: "/etc/my.cnf",
-			SubPath:   "my.cnf",
-			ReadOnly:  true,
-		},
 	}
 }

templates/octavia/config/db-sync-config.json

@@ -6,6 +6,12 @@
             "dest": "/etc/octavia/octavia.conf",
             "owner": "octavia",
             "perm": "0600"
+        },
+        {
+            "source": "/var/lib/config-data/merged/my.cnf",
+            "dest": "/etc/my.cnf",
+            "owner": "octavia",
+            "perm": "0644"
         }
     ],
     "permissions": [

templates/octaviaamphoracontroller/config/octavia-healthmanager-config.json

@@ -12,6 +12,12 @@
             "dest": "/etc/octavia/octavia.conf.d/custom.conf",
             "owner": "octavia",
             "perm": "0600"
+        },
+        {
+            "source": "/var/lib/config-data/merged/my.cnf",
+            "dest": "/etc/my.cnf",
+            "owner": "octavia",
+            "perm": "0644"
         }
     ]
 }

templates/octaviaamphoracontroller/config/octavia-housekeeping-config.json

@@ -12,6 +12,12 @@
             "dest": "/etc/octavia/octavia.conf.d/custom.conf",
             "owner": "octavia",
             "perm": "0600"
+        },
+        {
+            "source": "/var/lib/config-data/merged/my.cnf",
+            "dest": "/etc/my.cnf",
+            "owner": "octavia",
+            "perm": "0644"
         }
     ]
 }

templates/octaviaamphoracontroller/config/octavia-worker-config.json

@@ -12,6 +12,12 @@
             "dest": "/etc/octavia/octavia.conf.d/custom.conf",
             "owner": "octavia",
             "perm": "0600"
+        },
+        {
+            "source": "/var/lib/config-data/merged/my.cnf",
+            "dest": "/etc/my.cnf",
+            "owner": "octavia",
+            "perm": "0644"
         }
     ]
 }

templates/octaviaapi/config/octavia-api-config.json

@@ -47,6 +47,12 @@
             "owner": "octavia",
             "perm": "0600",
             "optional": true
+          },
+          {
+            "source": "/var/lib/config-data/merged/my.cnf",
+            "dest": "/etc/my.cnf",
+            "owner": "octavia",
+            "perm": "0644"
           }
     ],
     "permissions": [

templates/octaviaapi/config/octavia-driver-agent-config.json

@@ -28,6 +28,12 @@
             "perm": "0400",
             "optional": true,
             "merge": true
+        },
+        {
+            "source": "/var/lib/config-data/merged/my.cnf",
+            "dest": "/etc/my.cnf",
+            "owner": "octavia",
+            "perm": "0644"
         }
     ],
     "permissions": [

tests/kuttl/tests/octavia_tls/02-assert.yaml

@@ -135,8 +135,6 @@ spec:
           name: config-data-merged
           readOnly: true
           subPath: octavia-api-config.json
-        - mountPath: /etc/my.cnf
-          name: config-data
         - mountPath: /run/octavia
           name: octavia-run
         - mountPath: /etc/pki/ca-trust/extracted/pem/tls-ca-bundle.pem
@@ -194,8 +192,6 @@ spec:
           name: config-data-merged
           readOnly: true
           subPath: octavia-driver-agent-config.json
-        - mountPath: /etc/my.cnf
-          name: config-data
         - mountPath: /run/octavia
           name: octavia-run
         - mountPath: /etc/pki/ca-trust/extracted/pem/tls-ca-bundle.pem