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83 lines
2.8 KiB
YAML
83 lines
2.8 KiB
YAML
apiVersion: v1
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data:
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postgres_backup.sh: |
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#!/bin/bash
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DEBUG_LOG="/tmp/pg_backup_`date +%F`.log"
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echo "Plz check $DEBUG_LOG for debugging purpose. EVERY output will be redirected!"
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# fgoerz DEV-1029
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# pipe all output to file for debugging purpose
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exec 2>&1 1>$DEBUG_LOG
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function log
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{
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echo "$(date "+%Y-%m-%d %H:%M:%S.%3N") - $0 - $*"
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}
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[[ -z $1 ]] && echo "Usage: $0 PGDATA" && exit 1
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log "I was called as: $0 $*"
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readonly PGDATA=$1
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DAYS_TO_RETAIN=$BACKUP_NUM_TO_RETAIN
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readonly IN_RECOVERY=$(psql -tXqAc "select pg_is_in_recovery()")
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if [[ $IN_RECOVERY == "f" ]]; then
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[[ "$WALG_BACKUP_FROM_REPLICA" == "true" ]] && log "Cluster is not in recovery, not running backup" && exit 0
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elif [[ $IN_RECOVERY == "t" ]]; then
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[[ "$WALG_BACKUP_FROM_REPLICA" != "true" ]] && log "Cluster is in recovery, not running backup" && exit 0
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else
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log "ERROR: Recovery state unknown: $IN_RECOVERY" && exit 1
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fi
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# leave at least 2 days base backups before creating a new one
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[[ "$DAYS_TO_RETAIN" -lt 2 ]] && DAYS_TO_RETAIN=2
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if [[ "$USE_WALG_BACKUP" == "true" ]]; then
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readonly WAL_E="wal-g"
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[[ -z $WALG_BACKUP_COMPRESSION_METHOD ]] || export WALG_COMPRESSION_METHOD=$WALG_BACKUP_COMPRESSION_METHOD
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export PGHOST=/var/run/postgresql
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else
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readonly WAL_E="wal-e"
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# Ensure we don't have more workes than CPU's
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POOL_SIZE=$(grep -c ^processor /proc/cpuinfo 2>/dev/null || 1)
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[ "$POOL_SIZE" -gt 4 ] && POOL_SIZE=4
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POOL_SIZE=(--pool-size "$POOL_SIZE")
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fi
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BEFORE=""
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LEFT=0
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readonly NOW=$(date +%s -u)
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while read -r name last_modified rest; do
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last_modified=$(date +%s -ud "$last_modified")
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if [ $(((NOW-last_modified)/86400)) -ge $DAYS_TO_RETAIN ]; then
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if [ -z "$BEFORE" ] || [ "$last_modified" -gt "$BEFORE_TIME" ]; then
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BEFORE_TIME=$last_modified
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BEFORE=$name
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fi
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else
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# count how many backups will remain after we remove everything up to certain date
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((LEFT=LEFT+1))
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fi
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done < <($WAL_E backup-list 2> /dev/null | sed '0,/^name\s*\(last_\)\?modified\s*/d')
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# we want keep at least N backups even if the number of days exceeded
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if [ ! -z "$BEFORE" ] && [ $LEFT -ge $DAYS_TO_RETAIN ]; then
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if [[ "$USE_WALG_BACKUP" == "true" ]]; then
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$WAL_E delete before FIND_FULL "$BEFORE" --confirm
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else
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$WAL_E delete --confirm before "$BEFORE"
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fi
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fi
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# push a new base backup
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log "producing a new backup"
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# We reduce the priority of the backup for CPU consumption
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exec nice -n 5 $WAL_E backup-push "$PGDATA" "${POOL_SIZE[@]}"
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kind: ConfigMap
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metadata:
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name: pg-backup-script
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