Merge pull request #18 from mrname/user_auth

User auth

README.md

@@ -64,3 +64,15 @@ such as Kubernetes don't support dots and other special characters in
 environment variables. If you are on such a platform you could substitute the
 dots with two underscores `__`. The example above would look like `-e
 "DOCKER_VERNEMQ_LOG__CONSOLE__LEVEL=debug"`.
+
+#### File Based Authentication
+
+You can set up [File Based Authentication](https://vernemq.com/docs/configuration/authentication.html)
+by adding users and passwords as environment variables as follows:
+
+`DOCKER_VERNEMQ_USER_<USERNAME>='password'`
+
+where `<USERNAME>` is the username you want to use. This can be done as many times as necessary
+to create the users you want. The usernames will always be created in lowercase
+
+*CAVEAT* - You cannot have a `=` character in your password.

bin/vernemq.sh

@@ -17,7 +17,23 @@ sed -i '/########## Start ##########/,/########## End ##########/d' /etc/vernemq
 
 echo "########## Start ##########" >> /etc/vernemq/vernemq.conf
 
-env | grep DOCKER_VERNEMQ | grep -v DISCOVERY_NODE | cut -c 16- | tr '[:upper:]' '[:lower:]' | sed 's/__/./g' >> /etc/vernemq/vernemq.conf
+env | grep DOCKER_VERNEMQ | grep -v 'DISCOVERY_NODE\|DOCKER_VERNEMQ_USER' | cut -c 16- | tr '[:upper:]' '[:lower:]' | sed 's/__/./g' >> /etc/vernemq/vernemq.conf
+
+users_are_set=$(env | grep DOCKER_VERNEMQ_USER)
+if [ ! -z $users_are_set ]
+    then
+        echo "vmq_passwd.password_file = /etc/vernemq/vmq.passwd" >> /etc/vernemq/vernemq.conf
+fi
+
+for vernemq_user in $(env | grep DOCKER_VERNEMQ_USER);
+    do
+        username=$(echo $vernemq_user | awk -F '=' '{ print $1 }' | sed 's/DOCKER_VERNEMQ_USER_//g' | tr '[:upper:]' '[:lower:]')
+        password=$(echo $vernemq_user | awk -F '=' '{ print $2 }')
+        vmq-passwd -c /etc/vernemq/vmq.passwd $username <<EOF
+$password
+$password
+EOF
+    done
 
 echo "erlang.distribution.port_range.minimum = 9100" >> /etc/vernemq/vernemq.conf
 echo "erlang.distribution.port_range.maximum = 9109" >> /etc/vernemq/vernemq.conf