Add scheduler name support - [Update zalando#990] (zalando#1226)

* Add ability to specify alternative schedulers via schedulerName.

Co-authored-by: [email protected] <[email protected]>

Author: bbsbb

Diff for: charts/postgres-operator/crds/postgresqls.yaml

@@ -354,6 +354,8 @@ spec:
                       memory:
                         type: string
                         pattern: '^(\d+(e\d+)?|\d+(\.\d+)?(e\d+)?[EPTGMK]i?)$'
+              schedulerName:
+                type: string
               serviceAnnotations:
                 type: object
                 additionalProperties:

Diff for: docs/reference/cluster_manifest.md

@@ -65,6 +65,10 @@ These parameters are grouped directly under  the `spec` key in the manifest.
   custom Docker image that overrides the **docker_image** operator parameter.
   It should be a [Spilo](https://github.com/zalando/spilo) image. Optional.
 
+* **schedulerName**
+  specifies the scheduling profile for database pods. If no value is provided
+  K8s' `default-scheduler` will be used. Optional.
+
 * **spiloRunAsUser**
   sets the user ID which should be used in the container to run the process.
   This must be set to run the container without root. By default the container

Diff for: manifests/postgresql.crd.yaml

@@ -350,6 +350,8 @@ spec:
                       memory:
                         type: string
                         pattern: '^(\d+(e\d+)?|\d+(\.\d+)?(e\d+)?[EPTGMK]i?)$'
+              schedulerName:
+                type: string
               serviceAnnotations:
                 type: object
                 additionalProperties:

Diff for: pkg/apis/acid.zalan.do/v1/crds.go

@@ -535,6 +535,9 @@ var PostgresCRDResourceValidation = apiextv1.CustomResourceValidation{
 							},
 						},
 					},
+					"schedulerName": {
+						Type: "string",
+					},
 					"serviceAnnotations": {
 						Type: "object",
 						AdditionalProperties: &apiextv1.JSONSchemaPropsOrBool{

Diff for: pkg/apis/acid.zalan.do/v1/postgresql_type.go

@@ -60,6 +60,7 @@ type PostgresSpec struct {
 	ClusterName           string                      `json:"-"`
 	Databases             map[string]string           `json:"databases,omitempty"`
 	PreparedDatabases     map[string]PreparedDatabase `json:"preparedDatabases,omitempty"`
+	SchedulerName         *string                     `json:"schedulerName,omitempty"`
 	Tolerations           []v1.Toleration             `json:"tolerations,omitempty"`
 	Sidecars              []Sidecar                   `json:"sidecars,omitempty"`
 	InitContainers        []v1.Container              `json:"initContainers,omitempty"`

Diff for: pkg/apis/acid.zalan.do/v1/zz_generated.deepcopy.go

@@ -537,6 +537,7 @@ func (c *Cluster) generatePodTemplate(
 	spiloRunAsGroup *int64,
 	spiloFSGroup *int64,
 	nodeAffinity *v1.Affinity,
+	schedulerName *string,
 	terminateGracePeriod int64,
 	podServiceAccountName string,
 	kubeIAMRole string,
@@ -575,6 +576,10 @@ func (c *Cluster) generatePodTemplate(
 		SecurityContext:               &securityContext,
 	}
 
+	if schedulerName != nil {
+		podSpec.SchedulerName = *schedulerName
+	}
+
 	if shmVolume != nil && *shmVolume {
 		addShmVolume(&podSpec)
 	}
@@ -1184,6 +1189,7 @@ func (c *Cluster) generateStatefulSet(spec *acidv1.PostgresSpec) (*appsv1.Statef
 		effectiveRunAsGroup,
 		effectiveFSGroup,
 		nodeAffinity(c.OpConfig.NodeReadinessLabel),
+		spec.SchedulerName,
 		int64(c.OpConfig.PodTerminateGracePeriod.Seconds()),
 		c.OpConfig.PodServiceAccountName,
 		c.OpConfig.KubeIAMRole,
@@ -1885,6 +1891,7 @@ func (c *Cluster) generateLogicalBackupJob() (*batchv1beta1.CronJob, error) {
 		nil,
 		nil,
 		nodeAffinity(c.OpConfig.NodeReadinessLabel),
+		nil,
 		int64(c.OpConfig.PodTerminateGracePeriod.Seconds()),
 		c.OpConfig.PodServiceAccountName,
 		c.OpConfig.KubeIAMRole,