add docker healthcheck for Micorsoft SQL Server on Linux

sqlserver/Dockerfile

@@ -0,0 +1,32 @@
+FROM microsoft/mssql-server-linux
+
+LABEL maintainer "the@grillazz.com"
+
+RUN apt-get update && apt-get install -y  \
+	curl \
+	apt-transport-https
+
+#
+# https://docs.microsoft.com/en-us/sql/connect/odbc/linux/installing-the-microsoft-odbc-driver-for-sql-server-on-linux
+# in article above you can find proper url to install packages appropirate to your linux version
+#
+RUN curl https://packages.microsoft.com/keys/microsoft.asc | apt-key add -
+RUN curl https://packages.microsoft.com/config/ubuntu/16.04/prod.list > /etc/apt/sources.list.d/mssql-release.list
+RUN apt-get update
+RUN ACCEPT_EULA=Y apt-get install -y \
+    mssql-tools
+
+RUN apt-get install -y locales \
+    && echo "en_US.UTF-8 UTF-8" > /etc/locale.gen \
+    && locale-gen
+
+ENV PATH="/opt/mssql-tools/bin:${PATH}"
+ENV SA_PASSWORD=Alaska2017
+ENV ACCEPT_EULA=Y
+
+COPY docker-healthcheck /usr/local/bin/
+RUN chmod +x /usr/local/bin/db-healthcheck
+HEALTHCHECK CMD ["docker-healthcheck"]
+
+
+

sqlserver/docker-healthcheck

@@ -0,0 +1,24 @@
+#!/bin/bash
+set -eo pipefail
+
+host="$(hostname --ip-address || echo '127.0.0.1')"
+user=SA
+password=$SA_PASSWORD
+
+
+args=(
+        # force sqlserver to not use the local unix socket (test "external" connectivity)
+        -S $host
+        -U $user
+        -P $password
+        -d master
+        -Q "set nocount on; select count(*) from sys.objects"
+        -h -1
+
+)
+
+if select="$(sqlcmd "${args[@]}")" && [ $select > 1 ]; then
+	exit 0
+fi
+exit 1
+