Discuss March 2011

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286 participants
250 discussions

Xen stack scheme
by Jussi Hirvi 04 Mar '11

04 Mar '11

I need to restructure my server farm from tower PC:s to a minimal amount of 1U rack servers. I am going to rely on xen virtualization, as KVM seems not to be very mature yet. My current problem is the mail server, which uses a lot of CPU and I/O. A dedicated machine would be the best option. But would there be any sense in this: - run the mail server in xen dom0 (to get full native performance) - append a couple of light-weight servers as domU:s (like name server) - Jussi Hirvi -- Jussi Hirvi * Green Spot Topeliuksenkatu 15 C * 00250 Helsinki * Finland Tel. +358 9 493 981 * Mobile +358 40 771 2098 (only sms) jussi.hirvi(a)greenspot.fi * http://www.greenspot.fi

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CentOS-announce Digest, Vol 73, Issue 2
by centos-announce-request＠centos.org 04 Mar '11

04 Mar '11

Send CentOS-announce mailing list submissions to centos-announce(a)centos.org To subscribe or unsubscribe via the World Wide Web, visit http://lists.centos.org/mailman/listinfo/centos-announce or, via email, send a message with subject or body 'help' to centos-announce-request(a)centos.org You can reach the person managing the list at centos-announce-owner(a)centos.org When replying, please edit your Subject line so it is more specific than "Re: Contents of CentOS-announce digest..." Today's Topics: 1. CESA-2011:0219 Low CentOS 4 i386 and x86_64 EOL Notice (Johnny Hughes) ---------------------------------------------------------------------- Message: 1 Date: Thu, 03 Mar 2011 19:53:46 -0600 From: Johnny Hughes <johnny(a)centos.org> Subject: [CentOS-announce] CESA-2011:0219 Low CentOS 4 i386 and x86_64 EOL Notice To: CentOS-Announce <centos-announce(a)centos.org> Message-ID: <4D70462A.9060308(a)centos.org> Content-Type: text/plain; charset="iso-8859-1" CentOS Errata and Security Advisory CESA-2011:0219 This is the 1 year notification for the End of Life for the CentOS 4 distribution. The upstream provider will discontinue public updates of their EL4 product on February 29th, 2012. The CentOS Project will end support for CentOS 4 on the same date. CentOS 4, as well as all previously released versions of CentOS, will continue to be available in the Centos Vault: http://vault.centos.org/ This CESA includes a new centos-release file that reminds you of the February 29th, 2012 end of life date. Users still running production workloads on CentOS 4 are advised to begin planning the upgrade to CentOS 5 or (when available) CentOS 6 before the EOL date. For users who are unable to migrate off the EL 4 code base before its end-of-life date, the upstream provider intends to offer a limited, optional extension program. The CentOS Project recommends that you contact their sales team for a price quote for their extended service if you can not move to a newer code base before February 29th, 2012. x86_64: centos-release-4-9.1.x86_64.rpm i386: centos-release-4-9.1.i386.rpm src: centos-release-4-9.1.src.rpm

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HOW to REDIRECT to HTTPS?
by erikmccaskey64 04 Mar '11

04 Mar '11

I'm searching for a method [on client side] to redirect to HTTPS in a few given domains. e.g.: http://www.facebook.com/ to https://www.facebook.com/ Ok. I use several webbrowsers, and not all of them has "add-ons" to redirect these pages to https. My purpose is this: when i go to "http://www.facebook.com" i don't want to see any http traffic with wireshark Is this possible?? How can i achieve it? How can i automatically redirect http traffic for given domain names to HTTPS?? is it enough to redirect http? I mean then the webserver [e.g.: www.facebook.com] recognizes that i want to "talk" over HTTPS? I has a caching-nameserver on my pc - BIND I have an "ad blocking" proxy on my pc - PRIVOXY And my pc is a "linux box" - IPTABLES [iptables only knows ip addresses?]

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RFC: video call recommendations
by m.roth＠5-cent.us 04 Mar '11

04 Mar '11

I run CentOS at home, not just at work... Anyway, I've got a friend in Chicago who recently mentioned that they'd like to do videocalling. Now, I've heard of skype, but a quick google says there's some problems on Linux. I also see ekiga, and aMSN. Anyone here run such a beast, and have any recommendations or comments? Obviously, must work on CentOS, not Ubuntu, or Fedora, or TheLatestCoolestDistroThisMonth.... mark

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CentOS and Marvell SAS/SATA drivers
by Chuck Munro 04 Mar '11

04 Mar '11

Hello all, I've been on a real roller coaster ride getting a large virtual host up and running. One troublesome thing I've discovered (the hard way) is that the drivers for Marvell SAS/SATA chips still have a few problems. After Googling around quite a bit, I see a significant number of others have had similar issues, especially evident in the Ubuntu forums but also for a few RHEL/CentOS users. I have found that under heavy load (in my case, simply doing the initial sync of large RAID-6 arrays) the current 0.8 driver can wander off into the weeds after a while, less so for the older 0.5 driver in CentOS-5. It would appear that some sort of bug has been introduced into the newer driver. I've had to replace the Marvell-based controllers with LSI, which seem rock solid. I'm rather disappointed that I've wasted good money on several Marvell-based controller cards (2 SAS/SATA and 2 SATA). My question ... is anyone aware of the *real* status of these drivers? The Internet is full of somewhat conflicting reports. I'm referring to 'mvsas' and 'sata-mv', both of which seem to have issues under heavy load. It sure would be nice to return to using what appear to be well-made controller cards. I understand that even Alan Cox has expressed some frustration with the current driver status. FWIW, I had similar problems under the RHEL-6 evaluation OS too. Chuck

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how to make a safe php hosting
by Yang Yang 04 Mar '11

04 Mar '11

Hi,erverone i want to do a hosting business,and it is contain centos 5.5 ,php , nginx ,mysql ,proftpd erver use contain a document like /home/htdocs/mike ,and he only use ftp and see that document only and php and mysql is shared for all user is it ok to my design,anyone have good advice for me? and import is: how to make a safe php hosting??please give me some advice

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Re: [CentOS] Centos 6
by Anthony K 04 Mar '11

04 Mar '11

On 3/03/2011 7:14 PM, Sorin Srbu wrote: > Now, can we please not say anything about "when..." in a while? It's rather > tiresome seeing adult people trolling and having fights like three-year-olds in > a sandbox... 8-P > I'm just loving this soap opera - I see it as some form of venting since I'm such a coward and don't want to be flamed for asking obvious (in that the answer is always the same - ready when ready), and absolutely worthless questions. My $0.02! ak.

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CentOS 4.6 Samba Mount problem
by sync 04 Mar '11

04 Mar '11

Hi ,all : Today I run the following command to mount the Linux Server Samba share folder on my computer which installed CentOS 5.5 x86_64 . root@test ~: mount.cifs //IP/share /mnt root@test ~: mount -o loop /mnt/xxx.iso /media xxx.iso: Permission denied But I see the permission of that file is 755, that means others can do read and excute. Then I run "tailf /var/log/message" command and find the following error message : kernel :CIFS VFS: server IP of type Samba 3.0.25a-04.E6 returned unexpected error on SMB posix open, disabling posix open support. Check if server update available. By the way, the Linux Server which installed CentOS 4.6 64 bit and the samba version is 3.0.25a-04.E6. So is it the samba version bug? Or Should I update the new samba version ? Thanks in advance ....

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fast processing and buffering
by Michael D. Berger 03 Mar '11

03 Mar '11

I have a C++ program that opens, gets a little data from, and closes about 5000 files. Now if I run the program when I first boot up, the running time is from about 10 seconds to a minute. Subsequently, the program runs in well inter one second. Buffering -- right? So I changed a parameter, so the program gets a different (albeit similar) 5000 files from a different directory. Running time on the first try: well under one second. How about that? [~]$ uname -a Linux xxxxx 2.6.18-194.32.1.el5 #1 SMP Wed Jan 5 17:53:09 EST 2011 i686 i686 i386 GNU/Linux Thanks for your comments. Mike.

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Release 5.5 64-bit hangs on boot
by Kaplan, Andrew H. 03 Mar '11

03 Mar '11

Hi there -- I just completed installing the 64-bit version of Release 5.5, and while the installation and initial configuration completed successfully, a full boot-up is never completed successfully. During the system boot-up sequence the list of services appears to complete, but then a blank blue screen appears, and while the mouse pointer is present, it does not respond to any input. I let the system stand, in the hope it would correct itself, for about half an hour, but the status did not change. I did the installation a second time to see if this was a freak occurrence. Unfortunately, after the second attempt was completed, the same issue occurred on the server. Prior to doing the installation, I confirmed the DVD and CD media were tested and found to be valid. When I did the installation, I went with the base install along with Server, Server GUI, and Virtualization support. The server hardware is a Dell R515 system with two 500 GB SAS drives that are hardware-based RAID1 that was completely optimized prior to the software install. Has anyone experienced this issue before, and has an idea as to what is going on, and how it can be corrected? Thanks. The information in this e-mail is intended only for the person to whom it is addressed. If you believe this e-mail was sent to you in error and the e-mail contains patient information, please contact the Partners Compliance HelpLine at http://www.partners.org/complianceline . If the e-mail was sent to you in error but does not contain patient information, please contact the sender and properly dispose of the e-mail.

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Discuss March 2011