Get random region for Gardener cluster in backend switching job and c…

…heck for is-PR-approved (#420)

* get random region for Gardener cluster in backend switching job

* added check for is PR approved for backend switching job

.github/workflows/e2e-backend-switching-reuseable.yml

@@ -43,8 +43,6 @@ jobs:
         env:
           GARDENER_CLUSTER_VERSION: ${{ inputs.kube-version }}
           CLUSTER_PREFIX: ${{ inputs.cluster-name-prefix }}
-          GARDENER_REGION: "eu-west-1"
-          GARDENER_ZONES: "eu-west-1a"
           GARDENER_PROJECT_NAME: ${{ vars.GARDENER_PROJECT_NAME }}
           GARDENER_PROVIDER_SECRET_NAME: ${{ vars.GARDENER_PROVIDER_SECRET_NAME_AWS }}
           MACHINE_TYPE: "c4.xlarge"
@@ -60,6 +58,9 @@ jobs:
           # generate cluster name and export it to Github env for cleanup step to access it.
           export CLUSTER_NAME="${CLUSTER_PREFIX}$(openssl rand -hex 2)"
           echo "CLUSTER_NAME=${CLUSTER_NAME}" >> $GITHUB_ENV
+          # set random region for AWS.
+          export GARDENER_REGION=$(./scripts/gardener/aws/get_random_region.sh)
+          export GARDENER_ZONES="${GARDENER_REGION}a"
           # provision gardener cluster.
           make -C hack/ci/ provision-gardener-cluster
           kubectl version

.github/workflows/pull-target-e2e.yml

@@ -17,8 +17,19 @@ on:
       - "sec-scanners-config.yaml"
 
 jobs:
+  is-pr-approved:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Check if PR approved
+        env:
+          GH_TOKEN: ${{ github.token }}
+          PR_URL: https://github.com/kyma-project/eventing-manager/pull/${{ github.event.number }}
+        run: |
+          ./scripts/is_pr_approved.sh
+
   wait-until-build-succeeds:
     runs-on: ubuntu-latest
+    needs: is-pr-approved
     steps:
       - name: Wait for the 'pull-eventing-manager-build' job to succeed
         id: pull-wait-build

scripts/gardener/aws/get_random_region.sh

@@ -0,0 +1,28 @@
+#!/usr/bin/env bash
+
+# This script returns a random AWS region name for Gardener cluster.
+# Usage: No parameters are required to run this script. Simply call this script to get the region name.
+
+source "$(pwd)/scripts/utils/utils.sh"
+
+# standard bash error handling
+set -o nounset  # treat unset variables as an error and exit immediately.
+set -E          # needs to be set if we want the ERR trap.
+set -o pipefail # prevents errors in a pipeline from being masked.
+set -o errexit  # exit immediately when a command fails.
+
+# only lists the regions where machine type: `c1.xlarge` is available.
+AWS_REGIONS=(
+  "eu-west-1"
+  "us-east-1"
+  "us-west-1"
+  "us-west-2"
+  "sa-east-1"
+  "ap-northeast-1"
+)
+
+## MAIN Logic
+# NOTE: This script should only echo the result.
+RAND_INDEX=$(utils::generate_random_number 0 $(( ${#AWS_REGIONS[@]} - 1 )))
+# print the random region name
+echo ${AWS_REGIONS[$RAND_INDEX]}

scripts/gardener/aws/provision.sh

@@ -60,12 +60,22 @@ gardener::validate_and_default() {
     if [ -z "$GARDENER_CLUSTER_VERSION" ]; then
         # grep the default kube-version defined in kyma CLI.
         export GARDENER_CLUSTER_VERSION="$(${KYMA_CLI} provision gardener aws --help | grep "kube-version string" | awk -F "\"" '{print $2}')"
-        log::info "Using GARDENER_CLUSTER_VERSION=${GARDENER_CLUSTER_VERSION}"
     fi
+
+    # print configurations for debugging purposes:
+    log::banner "Configurations:"
+    echo "CLUSTER_NAME: ${CLUSTER_NAME}"
+    echo "GARDENER_REGION: ${GARDENER_REGION}"
+    echo "GARDENER_ZONES: ${GARDENER_ZONES}"
+    echo "MACHINE_TYPE: ${MACHINE_TYPE}"
+    echo "SCALER_MIN: ${SCALER_MIN}"
+    echo "SCALER_MAX: ${SCALER_MAX}"
+    echo "GARDENER_CLUSTER_VERSION: ${GARDENER_CLUSTER_VERSION}"
+    echo "RETRY_ATTEMPTS ${RETRY_ATTEMPTS}"
 }
 
 gardener::provision_cluster() {
-    log::info "Provision cluster: \"${CLUSTER_NAME}\""
+    log::banner "Provision cluster: \"${CLUSTER_NAME}\""
 
     # decreasing attempts to 2 because we will try to create new cluster from scratch on exit code other than 0
     ${KYMA_CLI} provision gardener aws \

scripts/is_pr_approved.sh

@@ -0,0 +1,24 @@
+#!/usr/bin/env bash
+
+# This script will check if a PR is approved or not.
+# Usage: To run this script, provide the following environment variable(s) and run this script.
+# - PR_URL - (example: https://github.com/kyma-project/eventing-manager/pull/123)
+
+# standard bash error handling
+set -o nounset  # treat unset variables as an error and exit immediately.
+set -E          # needs to be set if we want the ERR trap.
+set -o pipefail # prevents errors in a pipeline from being masked.
+set -o errexit  # exit immediately when a command fails.
+
+## MAIN Logic
+echo "Checking approval status of : ${PR_URL}"
+REVIEW_DECISION=$(gh pr view ${PR_URL} --json=reviewDecision | jq -r '.reviewDecision')
+
+echo "REVIEW_DECISION: ${REVIEW_DECISION}"
+if [[ ${REVIEW_DECISION} == "APPROVED"  ]]; then
+  echo "Pull request is approved!"
+  exit 0
+fi
+
+echo "Error: Pull request is not approved!"
+exit 1

scripts/utils/utils.sh

@@ -1,6 +1,6 @@
 #!/usr/bin/env bash
 
-source "${PROJECT_ROOT}/scripts/utils/log.sh"
+source "$(pwd)/scripts/utils/log.sh"
 
 # utils::check_required_vars checks if all provided variables are initialized
 # Arguments
@@ -18,3 +18,21 @@ function utils::check_required_vars() {
     exit 1
   fi
 }
+
+# utils::generate_random_number generates a random number between provided range.
+# Arguments
+# $1 - minimum
+# $2 - maximum
+# Example: utils::generate_random_number <minimum> <maximum>
+function utils::generate_random_number() {
+  # NOTE: This method should only echo the result.
+  if [ "$#" -ne 2 ]
+  then
+    log::error "Invalid arguments. Usage: utils::generate_random_number <minimum> <maximum>"
+    exit 1
+  fi
+
+  local min=$1
+  local max=$2
+  echo $(awk -v seed=$RANDOM "BEGIN{srand(seed); print int(rand()*($max-$min+1))+$min}")
+}