#!/bin/bash

DATE=$(date +%F)
DIRBACKUP="/data/backups"
DBUSER="postgres"

get_leader() {
    curl -s 127.0.0.1:8008 | jq -j ".role"
}

if [ "$(get_leader)" != "master" ]; then
    echo "I'm not leader. Exit"
    exit 0
fi

getDbName() {
    psql -lA -x -U ${DBUSER} -p 15432 -d postgres | grep Name | grep -v -P "template0|template1" | cut -d "|" -f 2
}

DBLIST=$(getDbName)

createBackup() {
    for db in $DBLIST; do
        echo "===================================="
        echo "START create backup database: ${db}"

        pg_dump -Fc -U ${DBUSER} -p 15432 -d "${db}" >"${DIRBACKUP}/${db}-${DATE}".sql
        
        bzip2 -9 "${DIRBACKUP}/${db}-${DATE}".sql
        
        echo "END database bzip2: ${db}"
    done

    pg_dumpall -p 15432 -U postgres --roles-only > "${DIRBACKUP}/roles-${DATE}".sql
}


[[ $(ls -A ${DIRBACKUP}) ]] 2>/dev/null && echo "dir ${DIRBACKUP} not empty" && exit 123

createBackup