staging.kernelci.org: only restart API if there were changes

Create a temporary local integration branch to look for a diff with the current staging branch, then only restart the API if there are changes. That way, the API services don't need to be restarted at every staging job and client scripts running elsewhere can remain connected. They will need to reopen their connections if the API is restarted, but that's typically because of API changes so client-side changes are most likely required too anyway. Signed-off-by: Guillaume Tucker <[email protected]>
kernelci · Aug 19, 2022 · a1b346a · a1b346a
1 parent a6caad8
commit a1b346a
Showing 1 changed file with 26 additions and 14 deletions.
diff --git a/staging.kernelci.org b/staging.kernelci.org
@@ -244,29 +244,41 @@ cmd_rotate_tree() {
 }
 
 cmd_api_pipeline() {
-    echo "Stopping containers"
+    echo "Stopping pipeline containers"
     cd checkout/kernelci-pipeline
     docker-compose down
     cd -
-    cd checkout/kernelci-api
-    docker-compose down
-    cd -
 
-    echo "Updating API branch"
-    ./pending.py kernelci-api --push
+    echo "Creating local staging branch in tmp directory while API is running"
+    mkdir -p tmp
+    pending_api="../pending.py --settings=../data/staging.ini kernelci-api"
+    (cd tmp; $pending_api)
+
+    echo "Looking for diff with current staging branch"
+    if (cd tmp; $pending_api --diff-only); then
+        echo "Stopping API containers"
+        cd checkout/kernelci-api
+        docker-compose down
+        cd -
+
+        echo "Updating API branch"
+        ./pending.py kernelci-api --push
+
+        echo "Starting API containers"
+        cd checkout/kernelci-api
+        REQUIREMENTS=requirements-dev.txt docker-compose build
+        docker-compose up -d
+        cd -
+    else
+        echo "No API changes, leaving it running"
+    fi
 
     echo "Updating pipeline branch"
     ./pending.py kernelci-pipeline --push
 
-    echo "Restarting containers"
-    cd checkout/kernelci-api
-    REQUIREMENTS=requirements-dev.txt \
-        docker-compose build
-    docker-compose up -d
-    cd -
+    echo "Starting pipeline containers"
     cd checkout/kernelci-pipeline
-    REQUIREMENTS=requirements-dev.txt \
-        docker-compose build
+    REQUIREMENTS=requirements-dev.txt docker-compose build
     SETTINGS=/home/kernelci/config/staging.kernelci.org.conf \
         docker-compose up -d
     cd -