openstack
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freezer
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Add some FAQ items 

Change-Id: I261ee66d00bd0cd90f5473a27945fb0755adabba
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Federico Ceratto 2015-10-27 12:48:58 +00:00 committed by Federico Ceratto
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FAQ.rst
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@ -76,3 +76,34 @@ FAQ
19) **What applications are supported in Windows for consisten backups?**
SQL Server (--mode sqlserver)
20) **Are there examples of OpenStack projects that use Freezer that I can look at?**
Not currently
21) **My service has it's own task scheduler. What is the recommended way to schedule Freezer runs?**
If you want to use the freezer-api and freezer-web-ui in horizon, you need to use the freezer-scheduler.
If you do not need the api and web ui, you can just execute the freezer-agent from crontab or any other scheduler.
22) **What are the benefits of using the API and Web UI?**
- You can start backup and restore jobs on any node from the Web UI
- Backup jobs can be synchronized across multiple nodes
- The UI provides metrics and other info
23) **How can I run user-defined scripts before and after a backup run?**
A simple solution is to implement your own script locally and execute
freezer-agent from it.
We recommend instead creating "exec"-type jobs in the UI and set up job
dependencies.
24) **What are the options for backing up MySQL/Percona?**
a. Make use of filesystem snapshots (LVM) using the "--mode mysql" option. It's supported natively by Freezer and suitable for large databases.
This instructs freezer to execute the following steps:
- flush tables and lock the DB
- take an LVM snapshot
- release the DB (so it's usable again very quiclky)
- backup the consistent DB image from the snapshot
- release the snapshot
b. Manual process - It does not require LVM and provides incremental backup.
- manually flush tables and lock the DB: "flush tables with read lock"
- backup the DB folder, usually /var/lib/mysql (--mode fs --path-to-backup /var/lib/mysql --max-level 14)
- manually unlock the DB
Using mysqldump is not recommended for speed and reliability reasons.