Merge pull request #7 from radondb/develop-pod-PriorityClass

[add]add pod PriorityClass, set default is system-cluster-critical

Author: zlianzhuang

platforms/kubernetes/postgres-operator/deploy/postgresql.yaml

@@ -47,6 +47,7 @@ spec:
       - enable_seqscan=on
     podspec:
       terminationGracePeriodSeconds: 60
+#      priorityClassName: high-priority
       containers:
         - image: radondb-postgresql:12.12-v1.0.0
           imagePullPolicy: IfNotPresent

platforms/kubernetes/postgres-operator/postgres/constants.py

@@ -121,6 +121,11 @@
 SPEC_ANTIAFFINITY_PODANTIAFFINITYTERM = "podAntiAffinityTerm"
 SPEC_ANTIAFFINITY_TOPOLOGYKEY = "topologyKey"
 
+# pod PriorityClass
+SPEC_POD_PRIORITY_CLASS = "priorityClassName"
+SPEC_POD_PRIORITY_CLASS_SCOPE_NODE = "system-node-critical"
+SPEC_POD_PRIORITY_CLASS_SCOPE_CLUSTER = "system-cluster-critical"
+
 # time
 SECONDS = 1
 MINUTES = SECONDS * 60

platforms/kubernetes/postgres-operator/postgres/handle.py

@@ -137,6 +137,9 @@
     MINUTES,
     HOURS,
     DAYS,
+    SPEC_POD_PRIORITY_CLASS,
+    SPEC_POD_PRIORITY_CLASS_SCOPE_NODE,
+    SPEC_POD_PRIORITY_CLASS_SCOPE_CLUSTER,
 )
 
 PRIMARY_FORMATION = " --formation primary "
@@ -619,6 +622,8 @@ def create_statefulset(
         "serviceName"] = statefulset_name_get_service_name(name)
     podspec = podspec_need_copy.copy()
     podspec["restartPolicy"] = "Always"
+    podspec.setdefault(SPEC_POD_PRIORITY_CLASS,
+                       SPEC_POD_PRIORITY_CLASS_SCOPE_CLUSTER)
     antiaffinity = antiaffinity_need_copy.copy()
     is_required = antiaffinity[
         SPEC_ANTIAFFINITY_POLICY] == SPEC_ANTIAFFINITY_REQUIRED