title: How to persist data using postgres docker image?
body: <p>I'm trying to get my data to persist in /home/me/redmine so that when my container stops, no data loss. I'm using the official postgres docker hub image.</p>
  
  <p>Problem is, every time I start the postgres container, it immediately exits. This problem started when I appended 'data' to /var/lib/postgresql, otherwise, without adding 'data', it starts, but my data isn't being saved. Also, the path I have on my host machine is /var/lib/postgresql/9.4/data, but the image page says to use /var/lib/postgresql/data.</p>
  
  <p>Here's how I'm trying to start/mount a volume from the host:</p>
  
  <pre><code>docker run --name postgres -d   \
      --env='DB_NAME=redmine_production' \
      --env='DB_USER=redmine' \
      --env='DB_PASS=secret' \
      --volume=/home/me/redmine/postgresql:/var/lib/postgresql/data \
      postgres
  </code></pre>
  
  <p>... and then after I would link redmine as follows ...</p>
  
  <pre><code>docker run -d -p 3000:3000 --name redmine \
      -v /home/me/redmine/files:/usr/src/redmine/files \
      --link postgres:postgres redmine
  </code></pre>
  
  <p>In the redmine container, the /home/me/redmine/files volume is a seperate directory where I'm trying to persist files aside from the ones in the Postgres database.</p>
  
  <p>Edit:</p>
  
  <p>When I cd into my host machines /var/lib/postgresql directory, I find within it 9.4/data and then see that the owner and group are not listed in my /etc/passwd or /etc/groups and wonder if this doesn't have something to do with the problem.</p>
  
  <pre><code>/var/lib/postgresql/9.4/data # ls -la
  total 88
  drwx------ 18   70   70 4096 Aug 13  2015 .
  drwxr-xr-x  3 root root 4096 Mar 28  2015 ..
  drwx------  8   70   70 4096 Jul  2  2015 base
  drwx------  2   70   70 4096 Jul  2  2015 global
  drwx------  2   70   70 4096 Mar 28  2015 pg_clog
  drwx------  2   70   70 4096 Mar 28  2015 pg_dynshmem
  lrwxrwxrwx  1 root root   31 Mar 28  2015 pg_hba.conf -&gt; /etc/postgresql-    9.4/pg_hba.conf
  lrwxrwxrwx  1 root root   33 Mar 28  2015 pg_ident.conf -&gt; /etc/postgresql-9.4/pg_ident.conf
  drwx------  4   70   70 4096 Mar 28  2015 pg_logical
  drwx------  4   70   70 4096 Mar 28  2015 pg_multixact
  drwx------  2   70   70 4096 Jul  2  2015 pg_notify
  drwx------  2   70   70 4096 Mar 28  2015 pg_replslot
  drwx------  2   70   70 4096 Mar 28  2015 pg_serial
  drwx------  2   70   70 4096 Mar 28  2015 pg_snapshots
  drwx------  2   70   70 4096 Aug 13  2015 pg_stat
  drwx------  2   70   70 4096 Aug 13  2015 pg_stat_tmp
  drwx------  2   70   70 4096 Mar 28  2015 pg_subtrans
  drwx------  2   70   70 4096 Mar 28  2015 pg_tblspc
  drwx------  2   70   70 4096 Mar 28  2015 pg_twophase
  -rw-------  1   70   70    4 Mar 28  2015 PG_VERSION
  drwx------  3   70   70 4096 Mar 28  2015 pg_xlog
  -rw-------  1   70   70   88 Mar 28  2015 postgresql.auto.conf
  lrwxrwxrwx  1 root root   35 Mar 28  2015 postgresql.conf -&gt; /etc/postgresql-9.4/postgresql.conf
  -rw-------  1   70   70 1626 Aug 13  2015 postmaster.log
  -rw-------  1   70   70  114 Jul  2  2015 postmaster.opts
  </code></pre>
  
  <p>Thoughts?</p>