adds auto-prune per namespace

This adds auto-pruning of taskrun and pipeline run per namespace
configured specifically.
adding unique schedule create a new cronjob in the annotated
namespace.
The default behaviour will persist, on top of it now user can
annotate a namespace with unique pruning configuration.
If user configures a unique schedule value by annotating a ns
a new cron job in that namespace will be created.

Auto puring is now enabled by default for default configurations
from tektonconfig.

Annotations introduced with this pr
 - "operator.tekton.dev/prune.skip"
 - "operator.tekton.dev/prune.resources"
 - "operator.tekton.dev/prune.resources.pipelineNames"
 - "operator.tekton.dev/prune.resources.taskNames"
 - "operator.tekton.dev/prune.keep"
 - "operator.tekton.dev/prune.keepsince"
 - "operator.tekton.dev/prune.schedule"

Signed-off-by: Pradeep Kumar <[email protected]>

config/crs/kubernetes/config/all/operator_v1alpha1_config_cr.yaml

@@ -19,3 +19,9 @@ metadata:
 spec:
   profile: all
   targetNamespace: tekton-pipelines
+  pruner:
+    resources:
+      - pipelinerun
+      - taskrun
+    keep: 2
+    schedule: "0 8 * * *"

config/crs/kubernetes/config/basic/operator_v1alpha1_config_cr.yaml

@@ -19,3 +19,9 @@ metadata:
 spec:
   profile: basic
   targetNamespace: tekton-pipelines
+  pruner:
+    resources:
+      - pipelinerun
+      - taskrun
+    keep: 2
+    schedule: "0 8 * * *"

config/crs/kubernetes/config/lite/operator_v1alpha1_config_cr.yaml

@@ -19,3 +19,9 @@ metadata:
 spec:
   profile: lite
   targetNamespace: tekton-pipelines
+  pruner:
+    resources:
+      - pipelinerun
+      - taskrun
+    keep: 2
+    schedule: "0 8 * * *"

config/crs/openshift/config/all/operator_v1alpha1_config_cr.yaml

@@ -25,3 +25,9 @@ spec:
       value: "true"
     - name: pipelineTemplates
       value: "true"
+  pruner:
+    resources:
+    - pipelinerun
+    - taskrun
+    keep: 2
+    schedule: "0 8 * * *"

config/crs/openshift/config/basic/operator_v1alpha1_config_cr.yaml

@@ -19,3 +19,9 @@ metadata:
 spec:
   profile: basic
   targetNamespace: openshift-pipelines
+  pruner:
+    resources:
+      - pipelinerun
+      - taskrun
+    keep: 2
+    schedule: "0 8 * * *"

config/crs/openshift/config/lite/operator_v1alpha1_config_cr.yaml

@@ -19,3 +19,9 @@ metadata:
 spec:
   profile: lite
   targetNamespace: openshift-pipelines
+  pruner:
+    resources:
+      - pipelinerun
+      - taskrun
+    keep: 2
+    schedule: "0 8 * * *"

pkg/apis/operator/v1alpha1/tektonconfig_types.go

@@ -58,7 +58,12 @@ type Prune struct {
 	Resources []string `json:"resources,omitempty"`
 	// The number of resource to keep
 	// You dont want to delete all the pipelinerun/taskrun's by a cron
+	// +optional
 	Keep *uint `json:"keep,omitempty"`
+	// KeepSince keeps the resources younger than the specified value
+	// Its value is taken in minutes
+	// +optional
+	KeepSince *uint `json:"keep-since,omitempty"`
 	// How frequent pruning should happen
 	Schedule string `json:"schedule,omitempty"`
 }

pkg/apis/operator/v1alpha1/tektonconfig_validation.go

@@ -62,10 +62,12 @@ func (p Prune) validate() *apis.FieldError {
 		errs = errs.Also(apis.ErrMissingField("spec.pruner.resources"))
 	}
 
-	if p.Keep == nil {
-		errs = errs.Also(apis.ErrMissingField("spec.pruner.keep"))
-	} else if *p.Keep == 0 {
+	if p.Keep == nil && p.KeepSince == nil {
+		errs = errs.Also(apis.ErrMissingOneOf("spec.pruner.keep", "spec.pruner.keep-since"))
+	} else if p.Keep != nil && *p.Keep == 0 {
 		errs = errs.Also(apis.ErrInvalidValue(*p.Keep, "spec.pruner.keep"))
+	} else if p.KeepSince != nil && *p.KeepSince == 0 {
+		errs = errs.Also(apis.ErrInvalidValue(*p.Keep, "spec.pruner.keep-since"))
 	}
 
 	if p.Schedule == "" {