Lazy upgrade of the Spilo image (#859)

* initial implementation

* describe forcing the rolling upgrade

* make parameter name more descriptive

* add missing pieces

* address review

* address review

* fix bug in e2e tests

* fix cluster name label in e2e test

* raise test timeout

* load spilo test image

* use available spilo image

* delete replica pod for lazy update test

* fix e2e

* fix e2e with a vengeance

* lets wait for another 30m

* print pod name in error msg

* print pod name in error msg 2

* raise timeout, comment other tests

* subsequent updates of config

* add comma

* fix e2e test

* run unit tests before e2e

* remove conflicting dependency

* Revert "remove conflicting dependency"

This reverts commit 65fc09054b.

* improve cdp build

* dont run unit before e2e tests

* Revert "improve cdp build"

This reverts commit e2a8fa12aa.

Co-authored-by: Sergey Dudoladov <sergey.dudoladov@zalando.de>
Co-authored-by: Felix Kunde <felix-kunde@gmx.de>

manifests/configmap.yaml

@@ -34,6 +34,7 @@ data:
   # enable_crd_validation: "true"
   # enable_database_access: "true"
   # enable_init_containers: "true"
+  # enable_lazy_spilo_upgrade: "false"
   enable_master_load_balancer: "false"
   # enable_pod_antiaffinity: "false"
   # enable_pod_disruption_budget: "true"

manifests/operatorconfiguration.crd.yaml

@@ -38,6 +38,8 @@ spec:
               type: string
             enable_crd_validation:
               type: boolean
+            enable_lazy_spilo_upgrade:
+              type: boolean
             enable_shm_volume:
               type: boolean
             etcd_host:

manifests/postgresql-operator-default-configuration.yaml

@@ -3,11 +3,12 @@ kind: OperatorConfiguration
 metadata:
   name: postgresql-operator-default-configuration
 configuration:
+  docker_image: registry.opensource.zalan.do/acid/spilo-cdp-12:1.6-p115
   # enable_crd_validation: true
+  # enable_lazy_spilo_upgrade: false
+  # enable_shm_volume: true
   etcd_host: ""
   # kubernetes_use_configmaps: false
-  docker_image: registry.opensource.zalan.do/acid/spilo-cdp-12:1.6-p115
-  # enable_shm_volume: true
   max_instances: -1
   min_instances: -1
   resync_period: 30m