Create main.sh

Author: lboix

main.sh

@@ -0,0 +1,63 @@
+#!/bin/bash
+set -e
+
+if [ -z $CLUSTER_GIT_CLONE_URL ]; then
+    echo "Missing CLUSTER_GIT_CLONE_URL environment var"
+    exit 1
+fi
+
+if [ -z $YAML_FILE_PATH ]; then
+    echo "Missing YAML_FILE_PATH environment var"
+    exit 1
+fi
+
+if [ -z $NAMESPACE ]; then
+    echo "Missing NAMESPACE environment var"
+    exit 1
+fi
+
+if [ -z $DOCKER_REPO ]; then
+    echo "Missing DOCKER_REPO environment var"
+    exit 1
+fi
+
+if [ -z $DOCKER_IMAGE ]; then
+    echo "Missing DOCKER_IMAGE environment var"
+    exit 1
+fi
+
+if [ -z $DOCKER_TAG ]; then
+    echo "Missing DOCKER_TAG environment var"
+    exit 1
+fi
+
+# add extra validations here if you need, regarding the value of those variables for example (you may want to check that only expected directories are modified)
+# if [ ... ]; then
+#     echo "Given value [...] is not authorised for deployment. Perhaps this is a typo?"
+#     exit 1
+# fi
+
+git clone --depth=1 $CLUSTER_GIT_CLONE_URL
+# if needed :
+# cd some-folder/some-subfolder/
+
+IMAGE_NAME=$DOCKER_REPO/$DOCKER_IMAGE:$DOCKER_TAG
+
+yq eval -i "select(.kind == \"Deployment\").spec.template.spec.containers[0].image = \"$IMAGE_NAME\"" $YAML_FILE_PATH
+
+# bonus : if your cluster Git repo does follow a clean nomenclature, then the path of the right .yaml file to update can be guessed with extra environment variables, like this for example :
+# yq eval -i "select(.kind == \"Deployment\").spec.template.spec.containers[0].image = \"$IMAGE_NAME\"" "$CLUSTER_FOLDER_NAME"/"$NAMESPACE"/"$PROJECT_TYPE"s/"$DEPLOYMENT_NAME".yaml
+
+# bonus : modify at the same time a container environment variable that tracks the current version deployed, for Datadog Agent for example :
+# yq eval -i "(select(.kind == \"Deployment\").spec.template.spec.containers[0].env[] | select(.name == \"DD_VERSION\")).value = \"$DOCKER_TAG\"" "$CLUSTER_FOLDER_NAME"/"$NAMESPACE"/"$PROJECT_TYPE"s/"$DEPLOYMENT_NAME".yaml
+
+git add -A
+if [ -n "$(git status --porcelain)" ]; then
+    echo "File "$YAML_FILE_PATH" has been modified"
+else
+    echo "The image $IMAGE_NAME is already used by Deployment $NAMESPACE:deployment/$DOCKER_IMAGE"
+    exit 1
+fi
+
+git commit -m "Rolling image $IMAGE_NAME to Deployment $NAMESPACE:deployment/$DOCKER_IMAGE"
+git push