From a5e5a6e9f301ee2463ab76e99778128ec7ae74f6 Mon Sep 17 00:00:00 2001
From: Tianon Gravi <admwiggin@gmail.com>
Date: Mon, 13 Jun 2016 14:15:10 -0700
Subject: [PATCH] Add "mongo"

---
 mongo/Dockerfile         |  5 +++++
 mongo/docker-healthcheck | 10 ++++++++++
 2 files changed, 15 insertions(+)
 create mode 100644 mongo/Dockerfile
 create mode 100755 mongo/docker-healthcheck

diff --git a/mongo/Dockerfile b/mongo/Dockerfile
new file mode 100644
index 0000000..8fc6779
--- /dev/null
+++ b/mongo/Dockerfile
@@ -0,0 +1,5 @@
+FROM mongo
+
+COPY docker-healthcheck /usr/local/bin/
+
+HEALTHCHECK CMD ["docker-healthcheck"]
diff --git a/mongo/docker-healthcheck b/mongo/docker-healthcheck
new file mode 100755
index 0000000..6361587
--- /dev/null
+++ b/mongo/docker-healthcheck
@@ -0,0 +1,10 @@
+#!/bin/bash
+set -eo pipefail
+
+if mongo --quiet localhost --eval 'quit(db.runCommand({ ping: 1 }).ok ? 0 : 2)'; then
+	exit 0
+fi
+
+# If the probe returns 2 ("starting") when the container has already moved out of the "starting" state then it is treated as "unhealthy" instead.
+# https://github.com/docker/docker/blob/dcc65376bac8e73bb5930fce4cddc2350bb7baa2/docs/reference/builder.md#healthcheck
+exit 2