#!/bin/bash
# Copyright (C) 2017 AT&T Intellectual Property. All rights reserved. 
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this code except in compliance
# with the License. You may obtain a copy of the License
# at http://www.apache.org/licenses/LICENSE-2.0
# 
# Unless required by applicable law or agreed to in writing, software  
# distributed under the License is distributed on an "AS IS" BASIS,  
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or  
# implied. See the License for the specific language governing  
# permissions and limitations under the License. 


# update a secondary database
set -x

die()
{
    echo $0: "$@" 1>&2
    echo $0: "$@"
    umask 022
    echo $0: "$@" >> /tmp/pgaas-failures
    exit 1
}

[ -n "$MASTER" ] || die "MASTER is not set"
[ -n "$PGDIR" ] || die "PGDIR is not set"
[ -n "$DBROOT" ] || die "DBROOT is not set"
[ -n "$CFGDIR" ] || die "CFGDIR is not set"

cd $CFGDIR/main || die "Cannot cd $CFGDIR/main"

PATH=${INSTALL_ROOT}/opt/app/pgaas/bin:$CFGDIR/etc:$PGDIR/bin:$PATH

umask 077
TMP=$(mktemp /tmp/tmp.uds1.XXXXXXXXXX)
trap 'rm -f $TMP' 0 1 2 3 15

# update postgresql.conf - got new ones
# update pg_hba.conf - got new ones
# set up repmgr.conf - in common

# replace/update recovery.conf
if [ -f $DBROOT/recovery.conf ];then mv $DBROOT/recovery.conf $DBROOT/recovery.conf.upgraded;fi
$CFGDIR/etc/gen-recovery.conf

# wait until master DB is active and has repmgr available
max=40
for s in `seq $max`
do
    echo "$s of $max: Asking master $MASTER if repmgr is ready"
    pgwget --progress=dot:giga -O$TMP http://$MASTER:8000/hasrepmgr
    if [ -s $TMP ]
    then
	msg=$(cat $TMP)
        case $msg in
	    OK* )
	        echo "Master has repmgr ready"
		done=yes
	        break
	        ;;
	    * )
	        echo "Master does not have repmgr ready, msg=$msg"
		;;
        esac
    fi
    rm -f $TMP
    sleep 15
done
[ "$done" = "yes" ] || die "Master never had repmgr available"


$CFGDIR/etc/start-db

sleep 10

# make sure the postgres password is right
$CFGDIR/etc/update-postgres-user

# register as standby
repmgr -f $CFGDIR/main/repmgr.conf standby register
echo repmgr ret=$?
sleep 10

# start repmgrd
# start repmgrd (verbose logging for testing)
umask 07
repmgrd -f $CFGDIR/main/repmgr.conf -d --verbose
echo repmgrd ret=$?
# start repmgrd (normal logging)
# repmgrd -f $CFGDIR/main/repmgr.conf -d

chmod 600 recovery.conf