Dashboard of ZFS Sync Status, modified from https://github.com/IronSummitMedia/startbootstrap-sb-admin-2
Dashboard to see if this system's dataset snapshots are in sync with a remote system's snapshots.
This does nothing on its own. But combine with other tools to make a nice dashboard.
I install this in a FreeBSD jail and forward tcp/80 to it.
See https://github.com/johnko/deploy/blob/master/bin/deploy_zfssyncstatus
/usr/local/www/data /iocage/tags/zfssyncstatus/root/usr/local/www/data nullfs ro 0 0
/var/log /iocage/tags/zfssyncstatus/root/var/hostlog nullfs ro 0 0
This goes on the jail host.
Create a file /usr/local/www/data/json-datasets.js with contents like this for each dataset you want to monitor:
[
{"name":"tank/dataset"},
{"name":"tank/mail"},
{"name":"tank/assets"},
{"name":"tank/website"}
]
This goes on the jail host.
Ideally, your zfs send/recv sync script will dump the last local and last remote snapshot names in json to the file /usr/local/www/data/json-snapshots.js
For an example see: https://github.com/johnko/zfs-tools/blob/master/bin/zfs-sync-xz-pull
Set https://github.com/johnko/gtfc-overlay/blob/master/_zfs-offsite-bkp/usr/home/urep/bin/zfs-sync-xz-pull-all to run in a user's crontab to perform the actual sync:
1 * * * * * zfs-sync-xz-pull-all
This goes on the jail host.
Similarly a script will output RAM and zpool usage to files:
/usr/local/www/data/json-ramusage.js/usr/local/www/data/json-poolusage.js/usr/local/www/data/json-tankusage.js
Since zfs-sync-xz-pull actually dumps the snapshots into separate files, this script also combines them to make /usr/local/www/data/json-snapshots.js
Set https://github.com/johnko/freebsd-system-info/blob/master/bin/stat-json-urep to run in a user's crontab:
0,15,30,45 * * * * stat-json-urep