ambari in container cannot use DNS server

[qinzhaokun]

I am working with ambari 1.7.0 and using ambari functions to start containers.

root@zqin:/home/zqin/Desktop/ambari-1.7.0# source ambari-functions
root@zqin:/home/zqin/Desktop/ambari-1.7.0# amb-deploy-cluster 3
starting an ambari cluster with: 3 nodes
[DEBUG] docker run -d --dns 127.0.0.1 --entrypoint /usr/local/serf/bin/start-serf-agent.sh -e KEYCHAIN= --name amb0 -h amb0.mycorp.kom sequenceiq/ambari:1.7.0 --tag ambari-server=true
WARNING: Localhost DNS setting (--dns=127.0.0.1) may fail in containers.
4c549361f6a69f1330efcd8c924fa553a22c9fea7dbc78f81f6ac8fd8a71f14b
[DEBUG] docker run -d -e SERF_JOIN_IP=172.17.0.1 --dns 127.0.0.1 --entrypoint /usr/local/serf/bin/start-serf-agent.sh -e KEYCHAIN= --name amb1 -h amb1.mycorp.kom sequenceiq/ambari:1.7.0 --log-level debug

and I find a warning like:WARNING: Localhost DNS setting (--dns=127.0.0.1) may fail in containers.

I use ubuntu in VM virtual box. When the installation completes, I can visit 172.17.0.1:8080 and ambari web UI can be shown.

However, I go into container amb0 and find ambari-server is not running. And the container cannot resolve any host like below:
bash-4.1# ping google.com
ping: unknown host google.com

Any when I check ambari server , it tells me it is not running like this:
bash-4.1# ambari-server status
Using python /usr/bin/python2.6
Ambari-server status
Ambari Server not running. Stale PID File at: /var/run/ambari-server/ambari-server.pid

Is the dns problem or other issues?

[lalyos]

Could you please elaborate on which branch, or tag are you using? As master is already amber 2.1.0

[qinzhaokun]

Hi @lalyos
the latest version also have the same problem. Checking ambari-server status, it shows not running.
And since the container cannot resolve any host name, the any url in the container fail :
ambari-shell>blueprint add --url https://raw.githubusercontent.com/sequenceiq/ambari-rest-client/2.1.11/src/main/resources/blueprints/multi-node-hdfs-yarn
No blueprint specified
ambari-shell>blueprint add --url https://raw.githubusercontent.com/sequenceiq/ambari-rest-client/2.1.11/src/main/resources/blueprints/single-node-hdfs-yarn
No blueprint specified
ambari-shell>cluster build --blueprint multi-node-hdfs-yarn
Command 'cluster build --blueprint multi-node-hdfs-yarn' was found but is not currently available (type 'help' then ENTER to learn about this command)
ambari-shell>cluster autoAssign
Command 'cluster autoAssign' was found but is not currently available (type 'help' then ENTER to learn about this command)
ambari-shell>cluster create --exitOnFinish true
Command 'cluster create --exitOnFinish true' was found but is not currently available (type 'help' then ENTER to learn about this command)

it cannot create any cluster in container and the ambari-server is not running at all.

it is the dns problem or other issues?