On 04/17/2016 12:13 PM, Andrej Vanek wrote:
Hello Adrian, I tried to use -U without "su"- launched directly by root: same behaviour. Finally I reverted my script to use standard backup (pg_start_backup; rsync; pg_stop_backup)- this works- the only downside is possible collisions with on-line backup/synchronizaiton of other two nodes on master node... Back to the pg_basebackup issue: it is clear to me that this is an issue of environment which launched pg_basebackup. Possibly either some privileges or some kernel parameters/limits. Who knows? Summary: clusterlab's crm_mon launched a shell script starting pg_basebackup which fails to do some its work (pg_basebackup: could not wait for child process: No child processes)- probably due to some failing system call. How can I report to clusterlabs: What system call fails in pg_basebackup?
All I can to do is point you at: https://wiki.postgresql.org/wiki/Getting_a_stack_trace_of_a_running_PostgreSQL_backend_on_Linux/BSD
Best Regards, Andrej 2016-04-17 1:09 GMT+02:00 Adrian Klaver <adrian.klaver@xxxxxxxxxxx <mailto:adrian.klaver@xxxxxxxxxxx>>: Is the su - even necessary? pg_basebackup is a Postgres client program you can specify the user you want it to connect to using -U. Or do you need the script to run as postgres in order to get permissions on wherever you are creating the backup directory? have to find out why pg_basebackup cannot fork when launched from crm_mon. I assume crm_mon is this: http://linux.die.net/man/8/crm_mon from Pacemaker. I do not use Pacemaker, but I am pretty sure that running what is a monitoring program in daemon mode and then shelling out to another program is not workable. The docs seem to bear this out: http://clusterlabs.org/wiki/PgSQL_Replicated_Cluster#Installation https://github.com/smbambling/pgsql_ha_cluster/wiki/Building-A-Highly-Available-Multi-Node-PostgreSQL-Cluster
-- Adrian Klaver adrian.klaver@xxxxxxxxxxx -- Sent via pgsql-general mailing list (pgsql-general@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general
