PostgreSQL won't start: “server.key” has group or world access

Question

Whenerver I start PostgreSQL using command:

$ sudo /etc/init.d/postgresql start

Pg doesn't start up. The error reported is:

 * Starting PostgreSQL 8.4 database server
 * The PostgreSQL server failed to start. Please check the log output:
2010-01-21 22:10:00 PST FATAL: private key file "server.key" has group or world access
2010-01-21 22:10:00 PST DETAIL: File must be owned by the database user or root, must have no write permission for "group", and must have no permissions for "other".

... and when I try to access psql as the postgres user with:

$ sudo su postgres
$ psql

it gives me an error:

 could not connect to server: No such file or directory
    Is the server running locally and accepting
    connections on Unix domain socket "/var/run/postgresql/.s.PGSQL.5432"?

Answer 1

I had solved it using ..

1) Enter the relevant directory (use> locate server.key)

2) Back up old server.key link.

3) Copy ssl-cert-snakeoil.key to server.key

4-5) Change its owner & group to postgres

6) Ensure the permissions are 700 or 740 (as requested by error message)

Recipe for my Ubuntu 12.04 & postgresql-8.3:

sudo cd /var/lib/postgresql/8.3/main/
sudo mv server.key server.key-0
sudo cp /etc/ssl/private/ssl-cert-snakeoil.key server.key
sudo chown postgres server.key
sudo chgrp postgres server.key
sudo chmod 740 server.key
sudo /etc/init.d/postgres-8.3 start

And now its working ! Thanks for support.

Answer 2

How about not to hard copying the Server Key and leaving it where and like it is.

Instead it is simplier to:

Change the "server.key" link Permissions in PostgreSQL Data Directory (its the Location where the Link to the private certificate.key File resides)

# cd /var/lib/postgresql/9.1/main/

to

# chown -R postgres:postgres server.key`

And make sure that the original Certificate in

# /etc/ssl/private/ssl-cert-snakeoil.key

has those Properties, by Setting them

# chmod 640 ssl-cert-snakeoil.key
# chown root:ssl-cert ssl-cert-snakeoil.key

This Solution has been tested on Debian. Please remember that CentOS can use the SELinux with extended User Rights Management, which can be viewed by

# ls -laZ *

Answer 3

As the error message says, fix the permissions for the key file server.key. The server runs as user "postgres" which should own the file. Try

#cd <path/to/pgsql/data> 
#chown postgres server.key
#chmod 0640 server.key

Answer 4

It happened to me and it turned out that I removed erroneously the postgres user from "ssl-cert" group, set it back with

gpasswd -a postgres ssl-cert

Answer 5

Setthe permissions of /etc/ssl/private to root:ssl-cert. Comments on this issue made me try this solution.

NOTE: even tough the answer is accepted, it didn't solve my issue. To help someone else i wanted to answer here.

Answer 6

sudo chown postgres /var/lib/postgresql/8.4/main/server.key

sudo chmod 0640 /var/lib/postgresql/8.4/main/server.key

Hit tab after postgresql to confirm your version.

Answer 7

Follow this https://www.postgresql.org/docs/9.6/ssl-tcp.html

use "chmod og-rwx server.key" and change user to postgres user using chown command.