Обсуждение: 5 Instances in one box -- Postgresql.conf Archive Log command

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5 Instances in one box -- Postgresql.conf Archive Log command

От
"Subramanian,Ramachandran"
Дата:

Hello,

 

We have 5 instances running under  different ports and we have multiple servers with the same structure. i.e. I have multiple servers with the same five instances per server configuration.

 

/var/lib/pgsql/INST1/data – Port number 1234

/var/lib/pgsql/INST2/data – Port number 1235

/var/lib/pgsql/INST3/data – Port number 1236

/var/lib/pgsql/INST4/data – Port number 1237

/var/lib/pgsql/INST5/data – Port number 1238

 

I try to make changes to postgresql.conf  in our sandbox/testing server for just one instance and I simply copy over the changes to all the instances and then to all the servers.

 

I want to place the archived WALs in separate directories for each instance.  How can I introduce the INST1 INST2 INST3 INST4 names in the archive command  variable /mnt/server/archivedir , without explicitly editing changing each postgresql.conf file? It is not absolutely important for me that the archive log directories bear the exact names INST1 2 3 ..5. however, I want the archive log directories to be resolved to unique names based on which instance the archive is done.

 

Thank you in advance for your time.

 

LG


Ram

 

archive_command = 'test ! -f /mnt/server/archivedir/%f && cp %p /mnt/server/archivedir/%f'  # Unix

 


Freundliche Grüße

i. A. Ramachandran Subramanian

Zentralbereich Informationstechnologie

Alte Leipziger Lebensversicherung a. G.

Hallesche Krankenversicherung a. G.

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Re: 5 Instances in one box -- Postgresql.conf Archive Log command

От
Greg Sabino Mullane
Дата:
You cannot do that natively with Postgres. However, one solution would be to make the archive_command into a separate file, that the main postgresql.conf includes. Then you can keep copying the postgresql.conf but keep the archive_command separate and unique. The syntax is

include = 'myserver.conf'

And then the myserver.conf would contain things specific to each server, e.g.

archive_command = 'test ! -f /archives/INST3/%f && cp %p /archives/INST3/%f'
cluster_name = 'inst3'


Cheers,
Greg