From 6d04eaf0b0a7d03ed9fc3ad369831703e2bc7a73 Mon Sep 17 00:00:00 2001
From: will Farrell <will.farrell@gmail.com>
Date: Sun, 22 Jan 2017 12:32:01 -0700
Subject: [PATCH] add default & remove bash

---
 Dockerfile | 3 +--
 README.md  | 9 +++------
 ping       | 6 +++---
 3 files changed, 7 insertions(+), 11 deletions(-)

diff --git a/Dockerfile b/Dockerfile
index 65562ca..1adbc4f 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,3 @@
 FROM alpine:3.5
-RUN apk add --no-cache bash
 COPY ping /
-CMD ["/ping"]
\ No newline at end of file
+CMD ["sh", "ping"]
\ No newline at end of file
diff --git a/README.md b/README.md
index e87343a..690c6b3 100644
--- a/README.md
+++ b/README.md
@@ -1,18 +1,15 @@
 # docker-ping
 
 ## ENV
-- `HOSTNAME` Server you would like to continuously ping
-- `TIMEOUT` Number of seconds between timeouts
+- `HOSTNAME` Server you would like to continuously ping [ default=localhost ]
+- `TIMEOUT` Number of seconds between timeouts [ default=300 ]
 
 ## docker-compose.yml
 ```yml
-version: "2"
-
+...
 services:
-
   ping:
     image: willfarrell/ping
-    restart: always
     environment:
       HOSTNAME: "10.0.0.61"
       TIMEOUT: 300
diff --git a/ping b/ping
index 73fe54a..6c640ea 100755
--- a/ping
+++ b/ping
@@ -1,4 +1,4 @@
-#!/bin/bash
-echo ping $HOSTNAME every $TIMEOUT sec
+#!/bin/sh
+echo ping ${HOSTNAME:=localhost} every ${TIMEOUT:=300} sec
 
-while true; do ping -c 1 $HOSTNAME; sleep $TIMEOUT; done;
\ No newline at end of file
+while true; do ping -c 1 ${HOSTNAME}; sleep ${TIMEOUT}; done;
\ No newline at end of file