postgresql doesn't start - Mailing list pgsql-general

I've a big problem with my postgresql installation

I've postgresql 9.3 installed on docker; I start it via supervisord

I've never had issues with postgresql and I don't touched nothing (no update, no changes)

[program:postgres]

command=/opt/postgresql.sh

autostart=true

autorestart=true

stopsignal=QUIT

#!/bin/sh

# This script is run by Supervisor to start PostgreSQL 9.3 in foreground mode

if [ -d /var/run/postgresql ]; then

    chmod 2775 /var/run/postgresql

else

    install -d -m 2775 -o postgres -g postgres /var/run/postgresql

fi

exec su postgres -c "/usr/lib/postgresql/9.3/bin/postgres -D /var/lib/postgresql/9.3/main -c config_file=/etc/postgresql/9.3/main/postgresql.conf"

until yesterday there were no problem

right now I see this in the /var/log/supervisor's directory:

2015-10-01 21:40:18 UTC HINT:  The file seems accidentally left over, but it could not be removed. Please remove the file by hand and try again.

2015-10-01 21:40:20 UTC FATAL:  could not remove old lock file "postmaster.pid": Permission denied

if I remove this file with sudo permissions when I re-run the process I've the same error and I don't understand why. I tried the same configuration (postgresql installation and configuration) in another new docker installation and works fine.

what's the problem?

someone help me?

I've very important databases and I dont' know how to recover it

please let me know, thanks in advance