Update systemd template

org/alt/systemd/Dockerfile.template

@@ -2,7 +2,9 @@ FROM {{ registry }}{{ organization }}/base:{{ branch }}
 
 MAINTAINER alt-cloud
 
-{{ install_pakages("systemd") }}
+ENV container docker
+
+{{ install_pakages("systemd-sysvinit") }}
 
 RUN ( \
         cd /lib/systemd/system/sysinit.target.wants/; \
@@ -17,4 +19,6 @@ RUN ( \
     rm -f /lib/systemd/system/sockets.target.wants/*initctl*; \
     rm -f /lib/systemd/system/basic.target.wants/*;
 
+VOLUME ["/sys/fs/cgroup"]
+
 CMD ["/sbin/init"]

org/alt/systemd/README.md

@@ -7,4 +7,5 @@ Copy Dockerfile somewhere and build the image:
 `$ docker build --rm -t <username>/systemd .`
 
 And launch the systemd container:
-`docker run -it  <username>/systemd`
+`docker run -d --name systemd --tmpfs /tmp --tmpfs /run --tmpfs /run/lock -v /sys/fs/cgroup:/sys/fs/cgroup:ro <username>/systemd`
+`docker exec -it systemd bash`