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cloudant-backup

The Python scripts in this repo can backup (export) and restore (import) all DBs from a Cloudant-based database: CouchDB, PouchDB, BigCouch.

Features

  • Based on the official Cloudant Python lib
  • Exports ALL databases, but can filter by name using RegEx
  • Exports everything into a single compressed ZIP file
  • Supports any attachments (export/import) without issues
  • Fast import: multithreaded bulk_docs process
  • Convenient: few dependencies, singles files

Why yet another backup tool?

Tool Limitation
cloudant/couchbackup Single DB, no attachments
docs@maintenance/backups Manual process, requires root acces to filesystem
danielebailo/couchdb-dump Single DB, no attachments
pouchdb-community/pouchdb-dump-cli Single DB, no attachments
raffi-minassian/couchdb-dump Deprecated, Single DB, no attachments

Requirements

This script requires Python >= 3.5, pip3, and the cloudant python lib.

Install pip3: sudo python3 -m ensurepip or check your distro packages.

Install all requirements: sudo pip3 install -r requirements.txt

Important note

This tool does a shallow backup, meaning that it is only backing up the latest revision of the docss in the databases. This is a faster, but a less complete backup.

If you run into issues (error 500) please see the troubleshooting section

Examples:

Remote backup

If:

  • your remote server doesn't meet the requirements for the script to be run
  • or you plan on doing external backup (example: pulling DBs daily from another server)
  • or want a local DB dump for development purposes

You can do that via SSH remote forwarding

Example: DB server is couchdb.myserver.com - couch runs in port 5984 with firewall rules that avoid you to reach the DB directly at http://couchdb.myserver.com:5984

You can access it locally via:

ssh -R 5984:localhost:1337 [email protected] -p22

Where:

  • 5984 is the remote DB port
  • 1337 is the port in your localhost that will tunnel the traffic to the DB
  • 22 is the SSH port of your server

Your new URL to reach the DB will be: http://localhost:1337

Backup examples

couchdb-backup.py is to be used when you need to extract/export/dump all the databases to a dump.zip file

a.1 DB localhost:5984, no credentials, output in dump.zip

./couchdb-backup.py

a.2 DB with custom port, no credentials, output in dump.zip

./couchdb-backup.py --host='http://localhost:1337'

a.3 DB localhost:5984, with credentials, output in dump.zip

./couchdb-backup.py --user='admin' --password='admin'

a.4 DB localhost:5984, with credentials, output in dump.zip, filter by database name using RegEx

./couchdb-backup.py --user='admin' --password='admin' --match='.*-myprogram|users|.*bkp.*'

Restore examples

couchdb-restore.py is to be used when you need to import/recover all the databases from the dump.zip file and write them to a DB server

b.1 DB localhost:5984, with credentials, input from dump.zip

./couchdb-restore.py

b.2 DB localhost:5984, with credentials, input from dump.zip

./couchdb-restore.py --user='admin' --password='admin'

b.3 Clean DBs, DB localhost:5984, with credentials, input from dump.zip

./couchdb-restore.py --user='admin' --password='admin' --clean

This flag will delete all DBs listed in the backup, without further action.

Troubleshooting

Linux

Ubuntu 20.04 + CouchDB installed from Snap

  1. Edit /etc/systemd/system/snap.couchdb.server.service and add LimitNOFILE=64000 under section [Service]
  2. Edit /var/snap/couchdb/5/etc/local.ini and add max_dbs_open = 2500 under section [couchdb]
  3. Reload systemctl and restart couchdb: sudo systemctl daemon-reload && sudo service snap.couchdb.server restart

Windows

  1. Edit CouchDB's local.ini and add max_dbs_open = 2500 under section [couchdb]
  2. Disable Antivirus (even Windows Defender) or exclude CouchDB, temporally during the import operation
  3. Restart the CouchDB service