Keep your CouchDB databases synchronized between two servers

couch_replication.sh

#!/bin/bash

#CouchDB replication sync script.
#Run on target CouchDB server and supply IP or DNS name of source.
#For example running 'bash couch_replicator.sh tcdb01' on tcdb02
#will keep tcdb02 in sync with all databases on tcdb01.


if [ "$#" -ne 1 ]; then
        echo "Wrong number of arguments!"
        echo "USAGE: $0 source_database"
fi

#sourceDB="http://admin:[password]@${1}:5984"
sourceDB="http://${1}:5984"
targetDB="http://admin:[password]@localhost:5984"

#get sources from all replication active tasks
replications=`curl -s ${targetDB}/_active_tasks | jq -r '[select(.[].type == "replication") | .[].source]'`

#go thru each target database and make sure there is a matching active task
for dbname in `curl -s ${sourceDB}/_all_dbs | jq -r '.[] | select(. | startswith("_") | not)'`; do
        found=`echo ${replications} | jq -r "select(.[] | contains(\"${dbname}\"))"`
        if [ -n "$found" ]; then
                echo "Found active replication task for ${dbname}"
                continue
        else
                echo "No active replication task for ${dbname}, starting continuous replication"
                #call replicate API
                curl -vX POST ${targetDB}/_replicate \
             -d "{\"source\":\"${sourceDB}/${dbname}\",\"target\":\"${dbname}\", \"continuous\": true, \"create_target\": true, \"user_ctx\": {\"roles\": [\"_admin\"]}}" \
             -H "Content-Type: application/json"
        fi
done