[Spacewalk-list] postgres DB backup question

Thu Mar 1 07:49:25 UTC 2018

Am 28. Februar 2018 19:15:20 MEZ schrieb Nicole Beck <nskyrca at syr.edu>:
>Thanks everyone. There are a lot of different ways to do it!
>
>The man page for pg_dumpall says "pg_dumpall also dumps global objects
>that are common to all databases. (pg_dump does not save these
>objects.) This currently includes information about database users and
>groups, tablespaces, and properties such as access permissions that
>apply to databases as a whole."  Is that something we have to worry
>about if we just use the "pg_dump rhnschema" method to backup?
>Spacewalk is the only database I have.
>
>
>Nicole
>
>________________________________
>From: spacewalk-list-bounces at redhat.com
><spacewalk-list-bounces at redhat.com> on behalf of Brian Long
><briandlong at gmail.com>
>Sent: Tuesday, February 27, 2018 10:49 AM
>To: spacewalk-list at redhat.com
>Subject: Re: [Spacewalk-list] postgres DB backup question
>
>I use the "db-control" program to handle an online (DB running) backup.
>db-control online-backup /local/backups/satellite-pgsql.$DATE
>1>/dev/null
>
>/Brian/
>
>On Mon, Feb 26, 2018 at 1:23 PM, Nicole Beck
><nskyrca at syr.edu<mailto:nskyrca at syr.edu>> wrote:
>Hello!
>I’m trying to backup my postgress DB using the Spacewalk install
>documentation at
>https://github.com/spacewalkproject/spacewalk/wiki/SpacewalkBackup, and
>it fails with the errors below. If I try it without spacewalk running, 
>it gives an error and creates an empty backup file. If I try it with
>spacewalk running, it creates a 3.9 GB backup file, but I can’t restore
>it. Spacewalk is the only thing using this database. How do you all do
>your database backups?
>
>Errors when spacewalk not running(creates empty backup file):
>
>[root at spacewalk ~]# spacewalk-service stop
>Shutting down spacewalk services...
>Redirecting to /bin/systemctl stop taskomatic.service
>Stopping cobblerd (via systemctl):                         [  OK  ]
>Redirecting to /bin/systemctl stop rhn-search.service
>Redirecting to /bin/systemctl stop osa-dispatcher.service
>Redirecting to /bin/systemctl stop httpd.service
>Redirecting to /bin/systemctl stop tomcat.service
>Redirecting to /bin/systemctl stop jabberd.service
>Redirecting to /bin/systemctl stop postgresql.service
>Done.
>[root at spacewalk ~]# su - postgres -c  'pg_dumpall >
>/var/lib/pgsql/backups/full_postgres_backup-`date +%Y%m%d`.sql'
>pg_dumpall: could not connect to database "template1": 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"?
>[root at spacewalk ~]# ls -al /var/lib/pgsql/backups
>total 0
>drwx------ 2 postgres postgres  47 Feb 26 12:32 .
>drwx------ 6 postgres postgres 122 Nov  1 14:55 ..
>-rw-r--r-- 1 postgres postgres   0 Feb 26 12:32
>full_postgres_backup-20180226.sql
>
>
>Errors when spacewalk running
>
>[root at spacewalk ~]# spacewalk-service start
>Starting spacewalk services...
>Redirecting to /bin/systemctl start
>Redirecting to /bin/systemctl start postgresql.service
>Redirecting to /bin/systemctl start jabberd.service
>Redirecting to /bin/systemctl start tomcat.service
>Waiting for tomcat to be ready ...
>Redirecting to /bin/systemctl start httpd.service
>Redirecting to /bin/systemctl start osa-dispatcher.service
>Redirecting to /bin/systemctl start rhn-search.service
>Starting cobblerd (via systemctl):                         [  OK  ]
>Redirecting to /bin/systemctl start taskomatic.service
>Done.
>[root at spacewalk ~]# su - postgres -c  'pg_dumpall >
>/var/lib/pgsql/backups/full_postgres_backup-`date +%Y%m%d`.sql'
>pg_dump: [archiver (db)] connection to database "template1" failed:
>FATAL:  no pg_hba.conf entry for host "[local]", user "postgres",
>database "template1", SSL off
>pg_dumpall: pg_dump failed on database "template1", exiting
>[root at spacewalk backups]# ls -al
>total 3910032
>drwx------ 2 postgres postgres         47 Feb 26 12:32 .
>drwx------ 6 postgres postgres        122 Nov  1 14:55 ..
>-rw-r--r-- 1 postgres postgres 4003869597 Feb 26 12:40
>full_postgres_backup-20180226.sql
>
>But you can’t restore per the github.com<http://github.com> directions:
>
>[root at spacewalk backups]# su - postgres
>Last login: Mon Feb 26 12:38:18 EST 2018 on pts/0
>-bash-4.2$ SPACEWALK_DB_NAME=spacewalkdb
>-bash-4.2$ ls /var/lib/pgsql/backups
>full_postgres_backup-20180226.sql
>-bash-4.2$
>SPACEWALK_DB_BACKUPFILE=/var/lib/pgsql/backups/full_postgres_backup-20180226.sql
>-bash-4.2$ full_postgres_backup-20180226.sql^C
>-bash-4.2$ id
>uid=26(postgres) gid=26(postgres) groups=26(postgres)
>-bash-4.2$ dropdb $SPACEWALK_DB_NAME
>dropdb: could not connect to database template1: 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"?
>
>Thanks!
>Nicole
>
>
>Nicole Beck
>Information Technology Analyst
>Information Technolgy Services – Core Infrustructure Services - Unix
>315.506.9744<tel:(315)%20506-9744>
>nskyrca at syr.edu<mailto:nskyrca at syr.edu>
>215 Machinery Hall, Syracuse, NY 13244
>syracuse.edu<http://syracuse.edu>
>Syracuse University
>
>
>
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I once had to restore the database. I just run the normal spacewalk-db-setup to get a clean DB and then restored my backup onto.

So if there is nothing else running on that postgres server (your spacewalk) , that should be it.

Robert
-- 
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