feat: add mutex action

.github/actions/mutex/action.yml

@@ -0,0 +1,56 @@
+name: "Slo mutex action"
+description: "Obtain or release mutex"
+author: "Ilya Shevchenko <id.shev@yandex.ru>"
+
+inputs:
+  KUBE_CONFIG:
+    description: "base64 kube config"
+    required: true
+  language:
+    description: "Language variant to obtain mutex by"
+    required: true
+  command:
+    description: "`obtain` or `release` command"
+    required: true
+
+runs:
+  using: "composite"
+  steps:
+    - run: mkdir $HOME/.kube; echo "${{ inputs.KUBE_CONFIG }}" | base64 -d > $HOME/.kube/config
+      shell: bash
+
+    - name: Get existing mutex configmap
+      run: kubectl get configmaps slo-mutex -o=yaml
+      shell: bash
+
+    - name: Check if locked
+      if: inputs.command == 'obtain'
+      run: |
+        if test -n "`kubectl get configmaps slo-mutex -o=jsonpath={.data.busy}`"; then
+          echo "Locked by `kubectl get configmaps slo-mutex -o=jsonpath={.data.lockedBy}`, wait";
+        fi
+      shell: bash
+
+    - name: Wait until unlocked (maximum 30 minutes waiting)
+      if: inputs.command == 'obtain'
+      # check every 30s for 60 times = 30 minutes
+      run: |
+        for run in {1..60}; do
+          if test -z "`kubectl get configmaps slo-mutex -o=jsonpath={.data.busy}`"; then
+            echo "Mutex unlocked!"; break;
+          fi;
+          sleep 30;
+        done
+
+        kubectl create configmap slo-mutex --from-literal=busy=true --from-literal=lockedBy=${{ inputs.language }} -o=yaml --dry-run=client | kubectl apply -f -
+      shell: bash
+
+    - name: Unlock mutex
+      if: inputs.command == 'release'
+      run: >
+        kubectl create configmap slo-mutex -o=yaml --dry-run=client | kubectl apply -f -
+      shell: bash
+
+    - name: Get mutex configmap
+      run: kubectl get configmaps slo-mutex -o=yaml
+      shell: bash

.github/workflows/slo.yml

@@ -32,7 +32,18 @@ on:
 concurrency: slo
 
 jobs:
+  obtain-mutex:
+    runs-on: ubuntu-latest
+    steps:
+      - name: obtain-mutex
+        uses: ydb-platform/slo-tests/.github/actions/mutex@main
+        with:
+          KUBE_CONFIG: ${{ secrets.SLO_KUBE_CONFIG }}
+          command: obtain
+          language: "${{ inputs.language }}"
+
   create-cluster:
+    needs: [obtain-mutex]
     runs-on: ubuntu-latest
     steps:
       - name: create-cluster
@@ -43,6 +54,7 @@ jobs:
           command: apply
 
   build-workload:
+    needs: [obtain-mutex]
     uses: ./.github/workflows/build-workload.yml
     secrets:
       DOCKER_REPO: ${{ secrets.SLO_DOCKER_REPO }}
@@ -149,3 +161,14 @@ jobs:
           subfolder: cluster_delete_action
           KUBE_CONFIG: ${{ secrets.SLO_KUBE_CONFIG }}
           command: delete
+
+  release-mutex:
+    runs-on: ubuntu-latest
+    needs: [delete-cluster]
+    steps:
+      - name: release-mutex
+        uses: ydb-platform/slo-tests/.github/actions/mutex@main
+        with:
+          KUBE_CONFIG: ${{ secrets.SLO_KUBE_CONFIG }}
+          command: release
+          language: "${{ inputs.language }}"