correct entry script bug and allow config from env file

- A bug in `entry` caused the script to not change into the directory correctly.
This was corrected by marking the script as bash rather than sh.
- `install.sh` now stops a running service before updating
- `docker-compose.yml` now assigns a consistent container name for the app
- `docker-compose.yml` now uses environment variables or a `.env` file to
  assign container name and port mappings if available
- updated readme file with better instructions

README.md

@@ -2,13 +2,39 @@
 
 Packaging and installation tools for Streamline's "Streamline EMR" application.
 
-## Usage
+## Building
 1. ensure you have docker access to this project's container registry on GitLab
 2. run `package.sh` to generate a new application package
 3. package will be stored to `build-packages/`
 
-## Notes
-- Example of running the app directly
-```bash
-docker run --rm -d --name streamline -p 3000:80 -p 6607:3306 -v ./data:/var/lib/mysql registry.gitlab.com/signalytic/client-external/streamline/streamline-emr:2.0
-```
+## Installing
+1. extract the generated archive file in a temporary folder on the target system
+2. run `install.sh`
+
+## Running
+### Production (systemd)
+On a production system, `systemd` will manage the lifecycle of the application, e.g.
+```
+# enable and start the the application service
+systemctl daemon-reload
+systemctl enable streamline-emr
+systemctl start streamline-emr
+
+# stop the application service
+systemctl stop streamline-emr
+
+# restart the application service
+systemctl restart streamline-emr
+```
+
+### Docker
+In a docker environment, the application must be started manually. This is done by running the `entry` script, for example:
+```
+/var/signalytic/clientapps/streamline/streamline-emr/entry
+```
+
+## Configuration
+Certain configuration options can be adjusted by setting environment variables or by defining these variables in a `.env` file stored in the same directory as the `docker-compose.yml` file. These variables are:
+`APP_PORTS`: port mapping for the web app server (default: `3000:80`)
+`DB_PORTS`: port mapping for the database server (default: `6607:3306`)
+`CONTAINER_NAME`: name of the application container (default: `streamline-emr`)

install.sh

@@ -21,6 +21,15 @@ if [ "$EUID" -ne 0 ]
   exit 1
 fi
 
+
+# stop any running systemd service if not running in a docker environment
+if [ -f /.dockerenv ]; then
+  echo "Docker environment detected - skipping systemd installation"
+else
+  echo "stopping system service"
+  systemctl stop streamline-emr
+fi
+
 set -e
 
 # copy root files
@@ -33,9 +42,8 @@ for f in $(find $LOCATION/images -name "*.img");do
   docker load -i $f
 done
 
-if [ -f /.dockerenv ]; then
-  echo "Docker environment detected - skipping systemd installation"
-else
+# install systemd service unless running in a docker environment
+if [ ! -f /.dockerenv ]; then
   echo "installing system service"
   systemctl daemon-reload
   systemctl enable streamline-emr

root/var/signalytic/clientapps/streamline/streamline-emr/docker-compose.yml

@@ -2,8 +2,9 @@ version: '3.9'
 services:
   streamline-emr:
     image: registry.gitlab.com/signalytic/client-external/streamline/streamline-emr:2.0
+    container_name: ${CONTAINER_NAME:-streamline-emr}
     volumes:
         - '/var/signalytic/clientapps/streamline/streamline-emr/data:/var/lib/mysql'
     ports:
-      - '3000:80'
-      - '6607:3306'
+      - ${APP_PORTS:-3000:80}
+      - ${DB_PORTS:-6607:3306}

root/var/signalytic/clientapps/streamline/streamline-emr/entry

@@ -1,5 +1,17 @@
-#!/bin/sh
-cd "$(dirname "${BASH_SOURCE[0]}")"
+#!/bin/bash
+
+APPROOT="$(dirname "${BASH_SOURCE[0]}")"
+
+echo "entering app root: $APPROOT"
+cd $APPROOT
+
+echo "creating data folder (if necessary)"
 mkdir -p data
-docker compose up --force-recreate
+
+echo "starting app"
+docker compose up
+
+echo "cleaning up"
 docker compose down
+
+echo "done."

template.env

@@ -0,0 +1,2 @@
+APP_PORTS="3001:80"
+DB_PORTS="6607:3306"