erlang cookie about docker-ejabberd HOT 10 CLOSED

docker run -d \
        --name "ejabberd" \
        --cidfile="ejabberdCID" \
        -p 5222:5222 \
        --link freeipa:freeipa \
        -p 5269:5269 \
        --restart=always \
        -p 5280:5280 \
        -p 5443:5443 \
        -p 4369:4369 \
        -h ds01.example.com \
        -e "XMPP_DOMAIN=example.com" \
        -e "ERLANG_NODE=ejabberd" \
        -e "TZ=America/Chicago" \
        -e "[email protected]" \
        -e "EJABBERD_AUTH_METHOD=ldap" \
        -e "EJABBERD_WEB_ADMIN_SSL=true" \
        -e "EJABBERD_STARTTLS=true" \
        -e "EJABBERD_S2S_SSL=true" \
        -e "EJABBERD_LDAP_SERVERS=freeipa" \
        -e "EJABBERD_LDAP_ROOTDN=uid=ejabberd,cn=sysaccounts,cn=etc,dc=example,dc=com" \
        -e "EJABBERD_LDAP_PASSWORD=RANDOMPASS" \
        -e "EJABBERD_LDAP_DEREF_ALIASES=always" \
        -e "EJABBERD_LDAP_BASE=ou=jabber_users,dc=example,dc=com" \
        -e "EJABBERD_LDAP_FILTER=" \
        -e "EJABBERD_LDAP_UIDS=uid" \
        -e "ERLANG_COOKIE=T5TggmN5VPlReSqtl9x0" \
        rroemhild/ejabberd

$ mkdir /tmp/lower /tmp/upper /tmp/work /tmp/merged
$ sudo mount -t overlay overlay -olowerdir=/tmp/lower,upperdir=/tmp/upper,workdir=/tmp/work /tmp/merged
$ sudo touch /tmp/merged/testfile
$ sudo chown $USER:$USER /tmp/merged/testfile
$ $ chmod +x /tmp/merged/testfile

uname -a
Linux ds01.example.com 3.10.0-327.18.2.el7.x86_64 #1 SMP Thu May 12 11:03:55 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux

Containers: 2
 Running: 1
 Paused: 0
 Stopped: 1
Images: 3
Server Version: 1.11.1
Storage Driver: devicemapper
 Pool Name: docker-253:1-302025371-pool
 Pool Blocksize: 65.54 kB
 Base Device Size: 10.74 GB
 Backing Filesystem: xfs
 Data file: /dev/loop0
 Metadata file: /dev/loop1
 Data Space Used: 1.597 GB
 Data Space Total: 107.4 GB
 Data Space Available: 57.78 GB
 Metadata Space Used: 2.847 MB
 Metadata Space Total: 2.147 GB
 Metadata Space Available: 2.145 GB
 Udev Sync Supported: true
 Deferred Removal Enabled: false
 Deferred Deletion Enabled: false
 Deferred Deleted Device Count: 0
 Data loop file: /var/lib/docker/devicemapper/devicemapper/data
 Metadata loop file: /var/lib/docker/devicemapper/devicemapper/metadata
 Library Version: 1.02.107-RHEL7 (2015-12-01)
Logging Driver: json-file
Cgroup Driver: cgroupfs
Plugins: 
 Volume: local
 Network: host bridge null
Kernel Version: 3.10.0-327.18.2.el7.x86_64
Operating System: CentOS Linux 7 (Core)
OSType: linux
Architecture: x86_64
CPUs: 8
Total Memory: 1.796 GiB
Name: ds01.example.com
Docker Root Dir: /var/lib/docker
Debug mode (client): false
Debug mode (server): false
Registry: https://index.docker.io/v1/