repo: refactor ci/repo to create a release on harbor on new repo tags

.gitlab-ci.yml

 image: gitlab-registry.cern.ch/linuxsupport/alma9-base
 
+include:
+  - project : 'ci-tools/container-image-ci-templates'
+    file : 'helm.gitlab-ci.yml'
+    ref: master
+
 stages:
   - lint
   - test
   - build
-  - tag
-  - release
+  - deploy
 
 docs_lint:
   stage: lint
+  rules:
+    - if: '$CI_COMMIT_TAG'
+      when: never
   script:
     - dnf install -y python-pip
     - python3 -m pip install linkcheckmd
@@ -17,6 +24,9 @@ docs_lint:
 
 yaml_lint:
   stage: lint
+  rules:
+    - if: '$CI_COMMIT_TAG'
+      when: never
   script:
     - dnf install -y epel-release
     - dnf install -y yamllint
@@ -24,6 +34,9 @@ yaml_lint:
 
 helm_lint:
   stage: lint
+  rules:
+    - if: '$CI_COMMIT_TAG'
+      when: never
   image: alpine/helm
   script:
     - helm dep update .
@@ -32,112 +45,41 @@ helm_lint:
 version_test:
   stage: test
   rules:
-    - if: '$CI_MERGE_REQUEST_TARGET_BRANCH_NAME == "master" || $CI_MERGE_REQUEST_TARGET_BRANCH_NAME == "qa"'
-      changes:
-        paths:
-          - Chart.yaml
-          - values.yaml
-          - templates/*
+    - if: '$CI_COMMIT_TAG'
   script: |
-    dnf install -y python3-pip
-    pip install yq
-    MASTER_VERSION=$(curl https://gitlab.cern.ch/monitoring/helm-charts/kubernetes-monitoring/-/raw/$CI_MERGE_REQUEST_TARGET_BRANCH_NAME/Chart.yaml?ref_type=heads | yq .version)
-    LOCAL_VERSION=$(cat Chart.yaml | yq .version)
-    if [ $MASTER_VERSION == $LOCAL_VERSION ]; then
-      echo "Please, update Chart.yaml version before merge."
-      exit -1
+    # Installing helm...
+    dnf install -y diffutils wget tar
+    wget https://get.helm.sh/helm-v3.15.3-linux-386.tar.gz
+    tar -zxvf helm-v3.15.3-linux-386.tar.gz
+    mv linux-386/helm /usr/local/bin/helm
+    rm helm-v3.15.3-linux-386.tar.gz
+    rm -rf linux-386
+
+    # Check if the tag already exists in harbor to avoid overrides.
+    if helm pull oci://registry.cern.ch/monit/cern-it-monitoring-kubernetes --version $CI_COMMIT_TAG; then
+      # Command was successful (exit code 0), so the tag exists
+      echo "The tag $TAG already exists in harbor. Please update it."
+      exit 1  # Exit with non-zero status to indicate tag exists
     else
-      echo "Chart version changed from $MASTER_VERSION to $LOCAL_VERSION."
+      # Command failed (non-zero exit code), so the tag does not exist
+      echo "The tag $TAG does not exist in harbor. All ok..."
+      exit 0  # Exit with 0 status
     fi
 
-helm_test:
-  stage: test
+helm_deploy:
+  stage: deploy
+  needs:
+    - version_test
   rules:
-    - if: '$CI_MERGE_REQUEST_TARGET_BRANCH_NAME == "master"'
-      changes:
-        paths:
-          - Chart.yaml
-          - values.yaml
-          - templates/*
+    - if: '$CI_COMMIT_TAG'
   script: |
-    dnf install -y python3-pip
-    pip install yq
-    dnf install -y python3-setuptools
-    dnf install -y gcc
-    dnf install -y python3-devel
-    dnf install -y epel-release
     dnf install -y diffutils wget tar
     wget https://get.helm.sh/helm-v3.15.3-linux-386.tar.gz
     tar -zxvf helm-v3.15.3-linux-386.tar.gz
     mv linux-386/helm /usr/local/bin/helm
     rm helm-v3.15.3-linux-386.tar.gz
     rm -rf linux-386
-
-    curl -LO "https://dl.k8s.io/release/$(curl -L -s https://dl.k8s.io/release/stable.txt)/bin/linux/amd64/kubectl"
-    install -o root -g root -m 0755 kubectl /usr/local/bin/kubectl
-    rm kubectl
-
-    pip install python-openstackclient
-    pip install python-magnumclient
-    dnf install openssl
-    
-    export OS_AUTH_URL=$CI_OS_AUTH_URL
-    export OS_PROJECT_ID=$CI_OS_PROJECT_ID
-    export OS_PROJECT_NAME=$CI_OS_PROJECT_NAME
-    export OS_USER_DOMAIN_NAME=$CI_OS_USER_DOMAIN_NAME
-    export OS_USERNAME=$CI_OS_USERNAME
-    export OS_PASSWORD=$CI_OS_PASSWORD
-    export OS_REGION_NAME=$CI_OS_REGION_NAME
-    export OS_INTERFACE=$CI_OS_INTERFACE
-    export OS_IDENTITY_API_VERSION=$CI_OS_IDENTITY_API_VERSION
-
-    echo "OpenStack configured as:"
-    echo "OS_AUTH_URL $OS_AUTH_URL"
-    echo "OS_PROJECT_ID $OS_PROJECT_ID"
-    echo "OS_PROJECT_NAME $OS_PROJECT_NAME"
-    echo "OS_USER_DOMAIN_NAME $OS_USER_DOMAIN_NAME"
-    echo "OS_USERNAME $OS_USERNAME"
-    echo "OS_PASSWORD $OS_PASSWORD"
-    echo "OS_REGION_NAME $OS_REGION_NAME"
-    echo "OS_INTERFACE $OS_INTERFACE"
-    echo "OS_IDENTITY_API_VERSION $OS_IDENTITY_API_VERSION"
-
-    CLUSTER_NAME=test-cluster-$(openssl rand -hex 2)
-    echo "Creating cluster $CLUSTER_NAME..."
-
-    openstack coe cluster create \
-      --cluster-template kubernetes-1.30.2-1 \
-      --node-count 1 \
-      --flavor m2.medium \
-      --merge-labels \
-      --labels eos_enabled=false \
-      --labels cern_enabled=false \
-      $CLUSTER_NAME
-    sleep 10
-
-
-    STATUS=$(openstack coe cluster show $CLUSTER_NAME -c status -f value)
-    while [ "${STATUS}" != "CREATE_COMPLETE" ] && [ "${STATUS}" != "CREATE_FAILED" ]
-    do
-      STATUS=$(openstack coe cluster show $CLUSTER_NAME -c status -f value)
-      echo "Current cluster status ... $STATUS $(date)"
-      sleep 10
-    done
-
-    echo "Cluster $CLUSTER_NAME CREATED. Configuring credentials."
-    openstack coe cluster config --force $CLUSTER_NAME 2> /dev/null || true
-    echo "Exporting Kubeconfig..."
-    export KUBECONFIG=$(pwd)/config
-
-    echo "Installing and testing helm chart"
-    LOCAL_VERSION=$(cat Chart.yaml | yq -r .version)
-    kubectl delete -f https://raw.githubusercontent.com/prometheus-operator/prometheus-operator/main/bundle.yaml || true
-    helm dependency update
+    sed -i "s/^version:.*/version: ${CI_COMMIT_TAG}/" Chart.yaml
     helm package .
-    ls -all
-    helm install cern-it-kubernetes-monitoring-crds https://gitlab.cern.ch/monitoring/helm-charts/kubernetes-monitoring-crds/-/archive/v0.1.0/kubernetes-monitoring-crds-v0.1.0.tar.gz -n monitoring --create-namespace
-    helm install cern-it-kubernetes-monitoring ./cern-it-kubernetes-monitoring-$LOCAL_VERSION.tgz -f values.yaml -n monitoring --create-namespace
-    helm test --logs cern-it-kubernetes-monitoring -n monitoring
-
-    echo "Deleting temporal cluster."
-    openstack coe cluster delete $CLUSTER_NAME
+    echo $REGISTRY_PASSWORD | helm registry login https://registry.cern.ch/v2/ -u $REGISTRY_USER --password-stdin
+    helm push cern-it-monitoring-kubernetes-$CI_COMMIT_TAG.tgz oci://registry.cern.ch/monit

Chart.yaml

 apiVersion: v2
-name: cern-it-kubernetes-monitoring
+name: cern-it-monitoring-kubernetes
+version: 0.0.0 # DO NOT UPDATE MANUALLY!
 type: application
-version: 0.2.0
 kubeVersion: ">=1.27.0-0"
 description: Helm Chart provided by IT Monitoring Service to install and configure required components to gather and send monitoring data from kubernetes clusters to central service.
 home: https://cern.ch/monitoring