Entries in the ' sysadmin ' category
Written April 20, 2008 in howto, mysql, reading list, sysadmin
- DBA Dojo: Category: MySQL
- xaprb.com: How to sync tables in a master/master MySQL Replication
- Ask Bjoern Hansen: DRBD and MySQL
- MySQL Performance Blog
- MySQL HA Blog
- HowToForge: MySQL 5 Master/Master Replication on Fedora 8
- Mark’s IT Blog: MySQL5 High Availability with DRBD 8
- BobCares: High Availability Hosting with DRBD
- Eric Bergen: DRBD in the Real World
We’ve had problems recently with our Dell 1650s at work. After five or six years of steady service, in the past three weeks we’ve had two bad fans on two separate machines, another machine has a voltage wobbly on it’s drive backplane, and another one failed with a rather dramatic …
JIRA Standalone runs, by default, as the user that starts the process on Linux. Running tomcat as root is generally a Bad Idea. Therefore, if you run JIRA as a service by adding a script under /etc/init.d and calling /etc/init.d/jira start … it’ll be running as root.
I opened a ticket with JIRA support several weeks ago pointing this out, and the only result has been adding one line of documentation that tells you how to add a user. This is not the best solution. Their solution would create a privileged user with a shell — you want to avoid this. Also, they don’t say anything about running JIRA as a service under init.d.
After the fold, there’s my init.d script for OpenSUSE 10.3. Gotta love JIRA, it’s more flexible than any other project management tool out there, but Atlassian apparently is not a company with a great deal of understanding of Linux.
Is your MySQL server running multiple processes with each running a single thread? Read this: Enabling Threading in MySQL. Ran into this on someone else’s legacy server today.
(Since this started out as a log for me to keep track of what my brain actually needs to be doing, and y’all just started reading it by accident, I’m gonna take my blog back for me for a sec.)
Reading I need to do over the weekend:
…
This article got posted on Digg earlier today: When Acts of God Bring Down Web Hosts … and it’s got to be the lamest collection of such stories that I’ve ever seen. Anyone who deals with other people’s servers
Here’s my list of stories from the past year:
- Softlayer Dallas: …
At the new job, we’ve got several ACNC JetStor drive arrays. They’re pretty nice units for the price… we have several 3TB SCSI arrays and several 12TB Fibre Channel arrays.
One of the features that’s always been set up and in place at work has been that the units send email notifications if they have an ‘event’. This is great, but wouldn’t indicate pending problems nor would it indicate the failure of the management card. (Well, ‘cept that all the websites would go down…) Since I’ve been implementing Nagios, I’ve also been implementing monitoring of all of our devices via SNMP. I’m doing performance monitoring on things like fan speeds and (where available) drive spindle speeds/smartd scores, monitoring power supplies, etc.
It’s easy to miss the single line in the auth_nz_ldap documentation that says “When using mod_auth_basic, this module is invoked via the AuthBasicProvider directive with the ldap value.”
It would help, of course, if someone provided a complete example for an auth_nz_ldap configuration, so here you go:
<Directory /path/to/my/web>
…
Ok, so you’ve got this [ hot new APC unit, new RAID array, network switch, router ]. The vendor, in their infinite wisdom, supplied a driver disk. But the device got a web management interface, so you just monitor things through there and watch for any problems to pop up. …
I really, really like the check_yum plugin. Here’s a link: http://www.openfusion.com.au/labs/nagios.
If you’re installing on CentOS, you’re going to want to
yum install elinks
, then run cpan as root and install
install Nagios::Plugin
… after that, you can install and add to your nagios command config. I usually run it in NRPE on …
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