Docker-in-docker: Add retries to the docker-init script until docker daemon starts (#637)feature_docker-in-docker_2.3.0

* Docker-in-docker: Add retries until docker daemon starts

* address comments

1 files changed, 26 insertions, 0 deletions

diff --git a/test/docker-in-docker/test-scripts/docker-test-init.sh b/test/docker-in-docker/test-scripts/docker-test-init.sh
new file mode 100644
index 0000000..b213fb4
--- /dev/null
+++ b/test/docker-in-docker/test-scripts/docker-test-init.sh
@@ -0,0 +1,26 @@
+#!/bin/sh
+#-------------------------------------------------------------------------------------------------------------
+# Copyright (c) Microsoft Corporation. All rights reserved.
+# Licensed under the MIT License. See https://go.microsoft.com/fwlink/?linkid=2090316 for license information.
+#-------------------------------------------------------------------------------------------------------------
+
+retry_count=0
+docker_ok="false"
+
+until [ "${docker_ok}" = "true"  ] || [ "${retry_count}" -eq "5" ];
+do
+    if [ "${retry_count}" -eq "3" ]; then
+        echo "Starting docker after 3 retries..."
+        /usr/local/share/docker-init.sh
+    fi
+
+    set +e
+        docker info > /dev/null 2>&1 && docker_ok="true"
+
+        if [ "${docker_ok}" != "true" ]; then
+            echo "(*) Failed to start docker, retrying in 5s... Retry count: ${retry_count}"
+            retry_count=`expr $retry_count + 1`
+            sleep 1s
+        fi
+    set -e
+done
\ No newline at end of file