Hi,
I cobbled together this somewhat shoddy Bash script to migrate email
accounts from our Cyrus server to a new dovecot system. Feel free to
use, or laugh at it as you wish :)
#!/bin/bash
##
# Migrate email accounts via IMAP from one server to another
##
trap "kill 0" SIGINT
workdir=/root/migrate
# Load list of users into array. The file "migration_map" should
contain one [email protected] per line.
mapfile userList < $workdir/migration_map
# Number of symultanious migrations
num=10
index=0
# Loop over the array of user accounts
function process_userlist {
procs=$(ps aux | grep "dsync" | grep -v "grep" | wc -l)
# Perform $num operations at a time for the length of the userList
while [[ $procs -lt $num ]] && [[ ${#userList[@]} -gt $index ]]; do
procs=$(ps aux | grep "dsync" | grep -v "grep" | wc -l)
dsync -o mail_fsync=never mirror -f -R -u ${userList[$index]}
imapc:&
echo "procs: $procs user: ${userList[$index]} index: $index"
let index++
done
}
# Until the userList is empty, keep going
until [ ${#userList[@]} -eq $index ]; do
process_userlist
done
exit 0
