Well, the title is kinda misleading since you need administrator privileges to run msconfig in it’s full scope. But this is just a hint to myself on how to execute msconfig without logging out and then logging in as administrator. 1 runas /user:Administrator C:WINDOWSpchealthhelpctrbinariesmsconfig.exe
Well, recently I stepped up to watch our cluster environments … Michael has a good howto on how to watch Windows Cluster environments in the NSclient++ wiki. Now, this has it’s own perks … Which I stumbled upon when trying to write a Linux-HA OCF resource agent for the Nagios NRPE server. Combining that Linux-HA with SLES10 is a good thing generally, but using startproc in that resource agent is not such a good idea. Apparently Novell (or SuSE GmbH) thought it might be wise to include some additional logic into the wrapper. startproc, checkproc and killproc do check for the name of the executable. So if you try to start an additional process with the same name, you need to dig a bit deeper. For this to work, you need two additional things (quotations directly from man 8 startproc): -p pid_file (Former option -f changed due to the LSB specification.) Use an alternate pid file instead of the default (/var/run/ .pid). The pid read from this file is being matched against the pid of running processes that have an executable with specified path of the program. In order to avoid confusion with stale pid files, a not up-to-date pid will be ignored. Now, then apparently this isn’t enough. startproc is still refusing to start a second process. -i ignore_file The pid found in this file is used as session id of the same binary program which should be ignored by startproc.
I just looked over the slides of a presentation one of my trainees bought back from Chemnitz, and there was this nifty one-line command, with which you can generate a random sha1sum for your authkeys file. Now, since I’m a bit lazy here’s the full command line to fill /etc/ha.d/authkeys for you: 1 2 node2 ~ [0] > echo "auth 1 1 sha1 $( dd if=/dev/urandom count=4 2> /dev/null | openssl dgst -sha1 )"
In the past, I always had problems with SLES and our Tivoli Storage Manager client’s when backing up files with german umlauts. Well, today I looked a bit harder, and quite quickly found a solution. 1 2 sles9 root [0] > env | grep ^LC LC_CTYPE=de_DE.UTF-8 As you can see from the above, SLES9/10 ain’t setting LANG or LC_ALL (which I searched for first), but is setting LC_CTYPE. So, simply changing the LC_CTYPE in the init-script and/or prepending the dsmc command line with a new LC_CTYPE fixes my umlauts problems! ...
Well, today I had to grind my head again, regarding the way check_snmp handles WARNING and CRITICAL events. From my point of view, check_snmp is really just retarded sometimes. As you know, all the other plugins accept WARNING and CRITICAL-thresholds based on the calculation, if the return integer is above this threshold it reached WARNING/CRITICAL state. But check_snmp doesn’t play that way. It expects only ranges, which are NOT gonna result in warning or critical events. Which is kinda stupid, since you gotta rethink twice about the thresholds 😛 ...
Well, most of you already know that I’m a Nagios fanatic. I like to watch as many aspects as I possibly can. So, yesterday I started figuring out ways to watch our different cluster groups (housing a bunch – try above 20.000 – of file shares). Now, my first tries failed horribly. I brought down a complete cluster group, resulting in a major annoyance. Now, today I went at it a bit smarter 😛 I cloned myself two VM’s off my Windows Server 2003 Enterprise R2 template, created a new cluster. ...
Well, I just glazed again over my my.cnf for our web-cluster because I just moved a database from one cluster to another and getting quite different performance from it. So, as I expected, there is a slight difference between both configuration files: 1 2 3 4 5 @@ -55,8 +58,6 @@ innodb_log_group_home_dir = /var/lib/mysql/db innodb_log_file_size = 512M innodb_thread_concurrency = 8 -sync_binlog = 1 And apparently, according to the MySQL Performance Blog that’s really, really bad (as well, we’re currently running without write caching, as the battery module of the storage is dead).
As you might recall from my first article about this topic, I had some troubles with the Microsoft Cluster Services and the registration replication. Now, today as we tried switching the TSM-Server for some resources, we ran into this again. We were using the service install tool (dsmcutil install scheduler) to set the new password as well as the GUI. Now, as we brought the resource online with the local service manager, everything was honky dory. But as soon as we brought it online using the Cluster Manager, it failed horribly. Why ? ...
Yeah, yeah .. I know, it’s weekend. But I usually can think much better when no one is rattling my cage. So I had another look at my replication problems. Don’t you never ever change InnoDB settings when migrating between hardware, because InnoDB is rather sensitive regarding those parameters. When you’re setting up the replication (don’t ask me why) and copying over the database to the second replication partner, be aware if you’re using wild cards you’re gonna get seriously bitten in the back. Now, let’s look at the constellation. ...
You know, I’m not getting any younger. It’s getting harder remembering every damn command … so here is how you get information out of your EXT3 filesystem: 1 2 3 4 5 6 7 8 9 10 sles10sp2 ~ [0] > tune2fs -l /dev/sda2 | grep "^Filesystem" Filesystem volume name: <none> Filesystem UUID: 8eec8235-4d9e-4b58-acf9-3c68c977d5ea Filesystem magic number: 0xEF53 Filesystem revision #: 1 (dynamic) Filesystem features: has_journal resize_inode filetype needs_recovery sparse_super large_file Filesystem state: clean Filesystem OS type: Linux Filesystem created: Tue May 27 10:48:56 2008