85 lines
2.2 KiB
Bash
Executable File
85 lines
2.2 KiB
Bash
Executable File
#!/bin/bash
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# Exit script if command fails
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set -e
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# Display Help
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Help() {
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echo
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echo "docker-postgres-backup"
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echo "######################"
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echo
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echo "Description: Backup docker postgres database."
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echo "Syntax: docker-postgres-backup [-d|-a|-o|-c|help]"
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echo "Example: docker-postgres-backup -d postgres,odoo -o /tmp -c postgres01"
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echo "options:"
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echo " -d Comma-separated list of database names."
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echo " -a Backup all databases"
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echo " -o Output directory. Defaults to '/var/tmp'."
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echo " -c Docker container. Defaults to 'postgres'."
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echo " help Show docker-postgres-backup manual."
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echo
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}
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# Show help and exit
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if [[ $1 == 'help' ]]; then
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Help
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exit
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fi
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# Process params
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while getopts ":a :c: :d: :o:" opt; do
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case $opt in
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a) ALL='true'
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;;
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c) CONTAINER="$OPTARG"
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;;
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d) DATABASES="$OPTARG"
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;;
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o) DIR="$OPTARG"
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;;
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\?) echo "Invalid option -$OPTARG" >&2
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Help
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exit;;
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esac
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done
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# Fallback to environment vars and default values
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: ${DIR:='/var/tmp'}
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: ${CONTAINER:='postgres'}
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# Verify variables
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[[ -z "$DATABASES" ]] && [[ -z "$ALL" ]] && { echo "Parameter -d or -a|databases or all must be set" ; exit 1; }
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[[ -z "$DIR" ]] && { echo "Parameter -d|dir is empty" ; exit 1; }
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[[ -z "$CONTAINER" ]] && { echo "Parameter -c|container is empty" ; exit 1; }
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if $ALL ; then
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# Get all databases from docker container
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DATABASE_LIST=($(docker exec $CONTAINER bin/bash -c "psql -U \$POSTGRES_USER \
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template1 -q -A -t -c 'SELECT datname FROM pg_database WHERE datistemplate = false;'"))
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# Concate database list
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printf -v DATABASES '%s,' "${DATABASE_LIST[@]}"
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DATABASES="${DATABASES%,}"
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fi
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if [[ ! -z $DATABASES ]] ; then
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# Split database param values
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DATABASE_LIST=($(echo $DATABASES | tr "," "\n"))
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fi
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# Create backup folder
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mkdir -p ${DIR}/${CONTAINER}
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# Cleanup backup folder
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rm -rf ${DIR}/${CONTAINER}/*
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# Create dump with docker for each database
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for DATABASE in "${DATABASE_LIST[@]}"
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do
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echo "Run Docker Postgres backup for $DATABASE"
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docker exec $CONTAINER /bin/bash -c "pg_dump -U \$POSTGRES_USER $DATABASE" > "${DIR}/${CONTAINER}/${DATABASE}.sql"
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done
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# Notify if backup has finished
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echo "The Docker Postgres backup has finished: ${DIR}/${CONTAINER}/{${DATABASES}}.sql"
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