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I am trying to setup HA solution for PostgreSQL. For that, I am running pgpool service. In that service, it calls a script whenever my primary node fails by calling it like this:
/etc/pgpool-II-94/failover.sh %d %H' where %d is my node id and %H is the hostname for the new server. Think of them simply as two parameters. My Failover script is below: #!/bin/sh failed_node=$1 new_master=$2 ( date echo "Failed node: $failed_node" set -x /usr/bin/ssh -T -l postgres $new_master "/usr/pgsql-9.4/bin/repmgr -f /var/lib/pgsql/repmgr/repmgr.conf standby promote 2>/dev/null 1>/dev/null <&-" exit 0; ) 2>&1 | tee -a /tmp/pgpool_failover.log The problem I am facing here is that when this script gets executed, it gets executed as root and hence I cannot authenticate it for postgres user for other server. How to run my pgpool service as postgres user itself so that my authentication get passed? Right now I am using: systemctl start pgpool-II-94 from postgres to postgres in all the servers I have setup passwordless ssh so that would not be an issue.
For example: when I run through postgres user -bash-4.2$ /usr/bin/ssh -T -l postgres lbdevsecondary 'echo $HOSTNAME' lbdevsecondary But when I run through root user, it asks for password /usr/bin/ssh -T -l postgres lbdevsecondary 'echo $HOSTNAME' postgres@lbdevsecondary's password: lbdevsecondary Or please tell me a way to rewrite the above statement in the way that I first logged in as postgres user and then run the commands from my scripts. I am using CentOS 7 and fairly new to Linux. Thanks, Vivek |
