[Spacewalk-list] postgres DB backup question

[Nicole Beck]

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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