deploy: wait until pods are up

This is useful because the caller then can be sure that the driver
installation has succeeded, without having to know details about
the pods that belong to the driver.

Author: pohly

deploy/deploy-hostpath.sh

@@ -114,3 +114,20 @@ for i in ${BASE_DIR}/hostpath/*.yaml; do
     done | kubectl apply -f -
 done
 
+# Wait until all pods are running. We have to make some assumptions
+# about the deployment here, otherwise we wouldn't know what to wait
+# for: the expectation is that we run attacher, provisioner,
+# snapshotter and hostpath plugin in the default namespace.
+cnt=0
+while [ $(kubectl get pods 2>/dev/null | grep '^csi-hostpath.* Running ' | wc -l) -lt 4 ]; do
+    if [ $cnt -gt 30 ]; then
+        echo "Running pods:"
+        kubectl describe pods
+
+        echo >&2 "ERROR: hostpath deployment not ready after over 5min"
+        exit 1
+    fi
+    echo $(date +%H:%M:%S) "waiting for hostpath deployment to complete, attempt #$cnt"
+    cnt=$(($cnt + 1))
+    sleep 10
+done