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Centos + python + sqlalchemy + mysql
by przemolicc＠poczta.fm 03 Feb '11

03 Feb '11

I am trying to use the following set (all from standard repositories): centos (5.5) + python 2.6 + sqlalchemy + mysql. However while running my script I get: Traceback (most recent call last): File "./oraping2.py", line 43, in <module> main() File "./oraping2.py", line 23, in main db = create_engine('mysql:///u1oraping@localhost:3306/oraping',echo=False,pool_recycle=1800) File "/usr/lib/python2.6/site-packages/sqlalchemy/engine/__init__.py", line 244, in create_engine return strategy.create(*args, **kwargs) File "/usr/lib/python2.6/site-packages/sqlalchemy/engine/strategies.py", line 60, in create dbapi = dialect_cls.dbapi(**dbapi_args) File "/usr/lib/python2.6/site-packages/sqlalchemy/dialects/mysql/mysqldb.py", line 101, in dbapi return __import__('MySQLdb') File "/usr/lib64/python2.4/site-packages/MySQLdb/__init__.py", line 19, in <module> import _mysql ImportError: /usr/lib64/python2.4/site-packages/_mysql.so: undefined symbol: Py_InitModule4 Did anybody faced this error ? Does anybody use the above set of software on Centos ? Regards Przemek ----------------------------------------------------------------- Sprawdz pogode. Kliknij >>> http://linkint.pl/f2903

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~/.forward file?
by Smithies, Russell 03 Feb '11

03 Feb '11

Hi all, I'm just poking thru our previous sysadmin's user adding script and saw reference to a ~/.forward file containing the users email address. Any idea what it might be for? It's a tricky one to Google ;-) Thanx, Russell Smithies ======================================================================= Attention: The information contained in this message and/or attachments from AgResearch Limited is intended only for the persons or entities to which it is addressed and may contain confidential and/or privileged material. Any review, retransmission, dissemination or other use of, or taking of any action in reliance upon, this information by persons or entities other than the intended recipients is prohibited by AgResearch Limited. If you have received this message in error, please notify the sender immediately. =======================================================================

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kernel errors
by Michel Donais 03 Feb '11

03 Feb '11

For monday this week I began to receive these advice by email from the server; Wht's the meaning? Disk read problem or else? --------------------- Kernel Begin ------------------------ WARNING: Kernel Errors Present I/O error: dev 08:02, sect...: 4Time(s) Additional sense indicates Unrecovered read error...: 4Time(s) Info fld=0x4f9c9, Current sd08:02: sense key Medium Error...: 1Time(s) Info fld=0x50e37, Current sd08:02: sense key Medium Error...: 1Time(s) Info fld=0x517a1, Current sd08:02: sense key Medium Error...: 1Time(s) Info fld=0x517e2, Current sd08:02: sense key Medium Error...: 1Time(s) ------------------------------------------------------------------------------------------ --- Michel Donais

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Re: [CentOS] how to move forward/undo/revert/fix re: a failed CentOS 5.5 to SL 5.5 migration ... [SOLVED?]
by Larry Vaden 02 Feb '11

02 Feb '11

On Wed, Jan 26, 2011 at 11:25 AM, Larry Vaden <vaden(a)texoma.net> wrote: > For various reasons which seemingly fail the necessary/sufficient > tests with the benefit of hindsight, I attempted to migrate a shell > machine which is the beach front from which I work (not a production > server) from CentOS 5.5 to Scientific Linux 5.5 yesterday. > > Karanbir is quoted on this list as having said something like: > > "All that you should need to do is install centos-release, remove > redhat-release rpms and just yum update the machine, which should > bring in all packages changed by CentOS ( since they will have a > slightly higher E-V-R )." > > In other words, is there a get out of jail card based on Karanbir's > stanza which will return the machine to a consistent state without a > fresh install? With apologies for replying to my own post, the final solution (possibly regarded as draconian and puerile by others) which seemed to work to return to a consistent state was to download Oracle R5U6 and invoke 'rpm -ivh' following some rpm which must be set aside in order to avoid "can not coexist." (e.g., bind vs. bind97 et al). My thoughts are that it would work as well once CentOS and Scientific Linux R5U6 are released. It was necessary to pay special attention to the output of updatedb; locate .rpm | egrep ".rpmnew$|.rpmorig$|.rpmsave$" No data was lost, but I watch some Dennis Miller, and like him at the end of a rant, "I could be wrong about that" :) kind regards/ldv

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what pkg contains libstdc++-libc6.2-2.so.3
by Fong Vang 02 Feb '11

02 Feb '11

In CentOS 4.1/2, what package contains this library: libstdc++-libc6.2-2.so.3? I installed a couple of the compat- packages, but this library is still missing.

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Squid and SELinux
by Marcos Lois Bermúdez 02 Feb '11

02 Feb '11

Hi. I'm trying to setup squid with SELinux, the problem i encounter is taht i want to add another directory for cache, in this system we have a home partition with huge space, i create a squid dir and add the path with semanage: semanage fcontext -a -t squid_cache_t '/home/squid(/.*)?' i check the files and are in the good context: drwxr-xr-x squid squid user_u:object_r:squid_cache_t . drwxr-xr-x squid squid system_u:object_r:home_root_t .. drwxr-x--- squid squid user_u:object_r:squid_cache_t 00 drwxr-x--- squid squid user_u:object_r:squid_cache_t 01 ... But when i want start it i get this: type=AVC msg=audit(1296442326.932:739661): avc: denied { search } for pid=30924 comm="squid" name="/" dev=sda3 ino=2 scontext=user_u:system_r:squid_t:s0 tcontext=system_u:object_r:home_root_t:s0 tclass=dir I know that the solution is to mount the huge partition on /var/spool/squid, i'm a newbie to SELinux, and want to know if it's posible to archive this. Regards.

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glibc++6.2?
by Hal Davison 02 Feb '11

02 Feb '11

Greetings ALL... V 5.5 Gnome. Desktop Looking for glibc++6.2 and higher. --Hal -- Hal Davison Observe Goal, Set the course, Burn the map Davison Consulting This correspondence was composed using Dragon Speaking Version 10 Peg#: 2007011701

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Re: [CentOS] CentOS 6.0 new virtualization features?
by Matt 02 Feb '11

02 Feb '11

>> I am excited about CentOS 6.x though. Aren't there supposed to be >> some neat new features etc for virtualization and cloud computing? > > this could be the start of a dangerously long thread nonrelated to OP. > Why not start a new thread with 'CentOS-6 interesting upcoming features' :) Your right.

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Re: [CentOS] RHEL-6 vs. CentOS-5.5 (was: Static assignment of, SCSI device names?)
by Chuck Munro 02 Feb '11

02 Feb '11

Les Mikesell wrote: > > On 1/30/11 1:37 PM, Chuck Munro wrote: >> > Hello list members, >> > >> > My adventure into udev rules has taken an interesting turn. I did >> > discover a stupid error in the way I was attempting to assign static >> > disk device names on CentOS-5.5, so that's out of the way. >> > >> > But in the process of exploring, I installed a trial copy of RHEL-6 on >> > the new machine to see if anything had changed (since I intend this box >> > to run CentOS-6 anyway). >> > >> > Lots of differences, and it's obvious that RedHat does things a bit >> > differently here and there. My focus has been on figuring out how best >> > to solve my udev challenge, and I found that tools like 'scsi_id' and >> > udev admin/test commands have changed. The udev rules themselves seem >> > to be the same. > Do any of the names under /dev/disk/* work for your static identifiers? You > should be able to use them directly instead of using udev to map them to > something else, making it more obvious what you are doing. And are these names > the same under RHEL6? > I was happy to see that device names (at least for SCSI disks) have not changed. The more I look into the whole problem the more I realize that I've overstated the difficulty, now that I know how to map out the hardware path for any given /dev/sdX I might need to replace. I've never dug as deeply into this before, mostly because I never could find the spare time. I'm happy with simply writing a little script which accepts a /dev/sdX device name argument and reformats the output of: 'udevadm info --query=path --name=/dev/sdX' to extract the hardware path. It's a bit cleaner than the current RHEL-5/CentOS-5 'udevinfo' command. Using the numeric path assumes knowledge of how the motherboard sockets are laid out and the order in which I/O controller channels are discovered, of course. It's then not difficult to trace a failed drive by attaching little tags to the SATA cables from the controller cards. The real key is to carefully label each SATA cable and its associated drive. Then the little mapping script can be used to identify the faulty drive which mdadm reports by its device name. It just occurred to me that whenever mdadm sends an email report, it can also run a script which groks out the path info and puts it in the email message. Problem solved :-) So even though I figured out how to add 'alias' symlink names to each disk drive, I'm not going to bother with it. It was a very useful learning experience, though. Chuck

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Setting up persistent LUNs
by Dvorkin, Asya 02 Feb '11

02 Feb '11

Hello everyone, I am trying to setup persistent LUNs and having problems. I've been following instructions I found on the web and they refer to editing /etc/scsi_id.config file and adding options=-g line there. After doing so, I should be able to run scsi_id -g -s /dev/sd* and get proper results. I've modified file /etc/scsi_id.config appropriately: [root@psrwjmsafs1 etc]# grep options /etc/scsi_id.config vendor="ATA",options=-p 0x80 options=-g but whenever I run scsi_id -g -s /b/sde1 - i get nothing. [root@psrwjmsafs1 etc]# df -k |grep sde /dev/sde1 1754602560 93383616 1572090328 6% /test How come? Am i missing something? Thank you! Asya

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