Add init to all docker examples

README.md

@@ -135,13 +135,14 @@ For some more details of what this command does, see [README-CERTS.md](README-CE
 
 We start the image in a docker container by issuing the following command.
 
-    $ docker run -d -p 8443:8443 --volume="$PWD/ssl:/etc/ssl/certs" --log-driver=syslog erlang-dockerwatch
+    $ docker run -d -p 8443:8443 --init --volume="$PWD/ssl:/etc/ssl/certs" --log-driver=syslog erlang-dockerwatch
     870f979c5b4cdb7a1ba930b020043f50fa7457bf787237706fb27eefaf5fe61d
 
 Let's parse some of the input.
 
  * `-d`, starts the container in the background and prints the container ID.
  * `-p 8443:8443`, exposes port `8443` from the container to our localhost.
+ * `--init`, use the tini initialization as PID 1 in order to prevent zombie processes.
  * `--volume="$PWD/ssl:/etc/ssl/certs"`, mounts our local directory
    (`$PWD/ssl`) with certificates to `/etc/ssl/certs` the container.
  * `--log-driver=syslog`, will log all data from stdout in the container to our local syslog.

advanced_examples/elk/README.md

@@ -84,6 +84,7 @@ services:
   dockerwatch:
     build: .
     image: dockerwatch
+    init: true
     ports:
       - "8443:8443"
     logging:
@@ -181,4 +182,4 @@ Start Kibana (configuration found in kibana/config/kibana.yml, $ELASTICSEACH_URL
 
 Start dockerwatch application
 
-	docker run -p 8443:8443 --volume="$PWD/ssl:/etc/ssl/certs" --log-driver=gelf --log-opt gelf-address=udp://0.0.0.0:44622 dockerwatch
+	docker run -p 8443:8443 --init --volume="$PWD/ssl:/etc/ssl/certs" --log-driver=gelf --log-opt gelf-address=udp://0.0.0.0:44622 dockerwatch

advanced_examples/elk/docker-compose.yml

@@ -1,8 +1,9 @@
-version: "2"
+version: "3.7"
 services:
   dockerwatch:
     build: .
     image: dockerwatch
+    init: true
     ports:
       - "8443:8443"
     logging:

advanced_examples/logstash/.travis.sh

@@ -6,7 +6,7 @@ set -x
 docker build -t logstash logstash/
 docker run --name logstash -d -p 9600:9600 -p 44622:44622/udp logstash
 docker build -t dockerwatch .
-docker run --name dockerwatch -d -p 8443:8443 --volume="$PWD/ssl:/etc/ssl/certs" --log-driver=gelf --log-opt gelf-address=udp://0.0.0.0:44622 dockerwatch
+docker run --name dockerwatch -d -p 8443:8443 --init --volume="$PWD/ssl:/etc/ssl/certs" --log-driver=gelf --log-opt gelf-address=udp://0.0.0.0:44622 dockerwatch
 IP=$(docker inspect --format='{{range .NetworkSettings.Networks}}{{.IPAddress}}{{end}}' dockerwatch)
 # Wait for logstash to finis startup
 until curl -s 'localhost:9600/_node'; do sleep 5; echo "waiting for logstash to finish startup"; done

advanced_examples/logstash/README.md

@@ -57,7 +57,7 @@ To forward log events (single line printouts to STDOUT) from the
 docker-erlang-example image into the Logstash container, use the
 `gelf` log driver and specify the UDP port number, for example:
 
-	docker run -p 8443:8443 --volume="$PWD/ssl:/etc/ssl/certs" --log-driver=gelf --log-opt gelf-address=udp://0.0.0.0:44622 dockerwatch
+	docker run -p 8443:8443 --init --volume="$PWD/ssl:/etc/ssl/certs" --log-driver=gelf --log-opt gelf-address=udp://0.0.0.0:44622 dockerwatch
 
 In general, a single line printout from Erlang's Logger can for
 instance be: