Add default maintenance window (#67)

* Adding default maintenance_window.

* Adding workaround in case of Terraform apply failure.

* Updating default kube version.

* Returning exit code 1 for failure.

* Adding Terraform fail scenario.

* Updating command.

.circleci/config.yml

@@ -69,6 +69,9 @@ jobs:
     steps:
       - checkout
       - run: EXAMPLE=from_scratch pipeline/run_terraform.sh
+      - run:
+          command: DESTROY=1 EXAMPLE=from_scratch pipeline/run_terraform.sh
+          when: on_fail
       - slack/notify:
           event: fail
           template: basic_fail_1

pipeline/run_terraform.sh

@@ -4,18 +4,16 @@ TERRAFORM="${TERRAFORM:-terraform}"
 
 "${TERRAFORM}" -v
 
-echo "$GCP_TOKEN" > /tmp/account.json
+echo "$GCP_TOKEN" >/tmp/account.json
 
 set -xe
 
 if [ ! -f /tmp/account.json ]; then
   echo "google credential json does not exists"
 fi
 
-
 export GOOGLE_APPLICATION_CREDENTIALS='/tmp/account.json'
 
-
 # unique deployment ID to avoid collisions in CI
 # needs to be 32 characters or less and start with letter
 DEPLOYMENT_ID=ci$(echo "${CIRCLE_PROJECT_REPONAME}${CIRCLE_SHA1}" | md5sum | awk '{print substr($1,0,5)}')
@@ -37,7 +35,7 @@ sed -i "s/REPLACE/$DEPLOYMENT_ID/g" backend.tf
 "${TERRAFORM}" init
 
 if [[ "$DESTROY" -eq 1 ]]; then
-    "${TERRAFORM}" destroy --auto-approve -var "deployment_id=$DEPLOYMENT_ID" -var "zonal=$ZONAL" -lock=false -refresh=false
+  "${TERRAFORM}" destroy --auto-approve -var "deployment_id=$DEPLOYMENT_ID" -var "zonal=$ZONAL" -lock=false -refresh=false
 else
     # this helps to fail fast in the pipeline, but it's not necessary
     "${TERRAFORM}" apply --auto-approve -var "deployment_id=$DEPLOYMENT_ID" -var "zonal=$ZONAL" -lock=false --target=module.astronomer_gcp.google_service_networking_connection.private_vpc_connection

variables.tf

@@ -9,12 +9,12 @@ variable "dns_managed_zone" {
 }
 
 variable "kube_version_gke" {
-  default     = "1.21.12-gke.2200"
+  default     = "1.21.14-gke.3000"
   description = "The kubernetes version to use in GKE"
 }
 
 variable "gke_release_channel" {
-  default     = "STABLE"
+  default     = "UNSPECIFIED"
   type        = string
   description = "The GKE Release channel to use. Blank for none"
 }
@@ -484,7 +484,11 @@ variable "daily_maintenance_window" {
   type = list(object({
     start_time = string
   }))
-  default = []
+  default = [
+    {
+      start_time = "13:00"
+    }
+  ]
 }
 
 variable "maintenance_exclusion" {