From 5d2839a43b66bd1c326e0e85fc9e5ee1cb2d7afa Mon Sep 17 00:00:00 2001
From: Hasnat Ullah <hasnat.ullah@gmail.com>
Date: Mon, 3 Jun 2019 20:14:28 +0100
Subject: [PATCH] More appropriate self healthcheck

---
 Dockerfile        | 2 +-
 docker-entrypoint | 8 +++++++-
 2 files changed, 8 insertions(+), 2 deletions(-)

diff --git a/Dockerfile b/Dockerfile
index ae825de..1ab87d4 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -6,6 +6,6 @@ RUN apk add --no-cache curl jq
 COPY docker-entrypoint /
 ENTRYPOINT ["/docker-entrypoint"]
 
-HEALTHCHECK --interval=5s CMD exit 0
+HEALTHCHECK --interval=5s CMD /docker-entrypoint healthcheck
 
 CMD ["autoheal"]
diff --git a/docker-entrypoint b/docker-entrypoint
index a1bf8ab..67f092d 100755
--- a/docker-entrypoint
+++ b/docker-entrypoint
@@ -12,11 +12,17 @@ term_handler() {
 }
 
 docker_curl() {
-  curl --max-time "${CURL_TIMEOUT}" --no-buffer -s --unix-socket "${DOCKER_SOCK}" "$@"
+  curl --max-time "${CURL_TIMEOUT}" --no-buffer -s --unix-socket "${DOCKER_SOCK}" "$@" || return 1
+  return 0
 }
 
 trap 'kill ${!}; term_handler' SIGTERM
 
+if [ "$1" = 'healthcheck' ]; then
+  docker_curl --fail http://localhost/_ping
+  exit $?
+fi
+
 if [ "$1" = 'autoheal' ] && [ -e ${DOCKER_SOCK} ]; then
   
   # https://docs.docker.com/engine/api/v1.25/