Discuss July 2014

discuss@lists.centos.org

211 participants
225 discussions

installing C7 on an existing software RAID system
by Fred Smith 09 Jul '14

09 Jul '14

I'm running Centos 6.5 on a software RAID-1 pair. I originally installed it following one of the howtos from the Centos WIKI for Centos 5. My first installation was on 5.x, then when I moved to 6.x I found that Anaconda worked enough like the one in 5.x that I could easily adapt the procedure. however, the new Anaconda is nothing like the old one, so I doubt the procedure could be made to work (or rather, that I would understand how to make it work). So, if there is anyone around who understands (1) the underlying procedures, and (2) has an idea how to do it in C7, I'd be forever (more or less) indebted if some form of howto could be created. Or at least a few hints? I'm not in a huge hurry to migrate this machine (my home desktop, box, actually) to C7, but eventually (during the next 3-6 months, likely) will want to either migrate on the same drive pair, or build a new one on a new pair of drives, so I'd really appreciate some docs or general guidance/info on how to proceed when the time strikes. thanks! Fred -- ---- Fred Smith -- fredex(a)fcshome.stoneham.ma.us ----------------------------- "For the word of God is living and active. Sharper than any double-edged sword, it penetrates even to dividing soul and spirit, joints and marrow; it judges the thoughts and attitudes of the heart." ---------------------------- Hebrews 4:12 (niv) ------------------------------

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upgrade from 6.5 to 7
by Wes James 09 Jul '14

09 Jul '14

I installed centos 6.5 from a dvd. Now that 7 is out, I'l like to try it. I tried: sudo yum clean all && sudo yum update but it said there were no updates. Is there a command-line way to upgrade from 6.5 to 7? Thanks, -wes

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Re: [CentOS] Cemtos 7 : Systemd alternatives ?
by Robert Moskowitz 08 Jul '14

08 Jul '14

On 07/08/2014 03:21 PM, Reindl Harald wrote: > > Am 08.07.2014 18:17, schrieb Robert Moskowitz: >> On 07/08/2014 11:05 AM, Russell Miller wrote: >>> Even its sysv compatibility is incomplete. It runs sysv scripts, but in such a >>> way as to break any but the simplest. I've run into situations where I've actually >>> had to make a systemd unit because it broke the script, and I couldn't fix it. The >>> script was fine, ran perfectly if you just ran it, and systemd did... *something*... >>> to it. I still haven't figured out what. And debugging is an absolute pain. >> I am also struggling with this and the HIPL code (on F20). If you just >> start the services, it takes about 5 min to complete. If you just run >> the programs and tell them to drop into the background it is a handful >> of seconds. Strip out comments from the script and it starts right up >> with systemctl. Huh? What is going on? I was told that systemctl does >> seem to try and make 'sense' out of comments... > so why do you not write a simple systemd-unit starting your shellscript? > > > [root@testserver:~]$ cat /usr/lib/systemd/system/zram.service > [Unit] > Description=Enable compressed swap in memory using zram > > [Service] > RemainAfterExit=yes > ExecStart=/usr/sbin/zram.sh start > ExecStop=/usr/sbin/zram.sh stop > Type=oneshot > > [Install] > WantedBy=multi-user.target > partially because I am the tester, not the developer. I found the problem, though. So I will pass this on to the developers.

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Re: [CentOS] Centos 7 : Systemd alternatives ?
by John R. Dennison 08 Jul '14

08 Jul '14

On Tue, Jul 08, 2014 at 10:08:35PM +0200, admin(a)rhsoft.net wrote: > > besides that somebody with "kill yourself" as reject message > has no permission to judge anybody stop that lie, it won't get > true by repeat it i am a subscriber - otherwise your mail won't > reach my inbox If you're going to lie at least put a little effort into it? Not a single one of your replies shows up to the list; the only thing the list gets are the contents of mail that people Cc: you on in their replies. You are not showing in the archives under any known mail address. Hell, even the header paste you just did doesn't back up your claims. Fact: You have been removed from this list and are using nefarious methods to continue to post to it in order to get your vitriol across to the masses. For full disclosure you are indeed 5xx'd here: /.*(a)thelounge\.net/ 555 For the sake of humanity please kill yourself. /reindl\.harald(a)gmail\.com/ 555 No, really. Suicide can be painless if you work at it. Perhaps you should ask yourself why I would take the time and trouble to drop you from my MTAs. John -- "Be always at war with your vices, at peace with your neighbors, and let each new year find you a better man." -- Benjamin Franklin

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Re: [CentOS] Cemtos 7 : Systemd alternatives ?
by Les Mikesell 08 Jul '14

08 Jul '14

On Tue, Jul 8, 2014 at 2:34 PM, Reindl Harald <h.reindl(a)thelounge.net> wrote: > >> Our servers tend to just run till they die. If we didn't need them we >> wouldn't have bought them in the first place. I suppose there are >> businesses with different processes that come and go, but I'm not sure >> that is desirable > > what proves you never done serious IT No, it means our servers run for years, > the goal of standby servers in case of virtualization is that > you know there may be load peaks from time to time but mostly > you don't need up 4 servers We design to handle a whole data center failure in only the time it takes for a new client connection. With/without systemd, nobody is going to wait for a new server to spin up. -- Les Mikesell lesmikesell(a)gmail.com

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Re: [CentOS] OT - Re: Cemtos 7 : Systemd alternatives ?
by m.roth＠5-cent.us 08 Jul '14

08 Jul '14

Steve Clark wrote: > On 07/08/2014 12:55 PM, Robert Moskowitz wrote: >> On 07/08/2014 12:44 PM, Hal Wigoda wrote: >>> You aren't old. >> And I am a young 21. three times over. All that means is I have to >> learn new stuff now 3 times to get it right! As some people on this >> list will attest to :) >> >> Soon I will be 26 (2^6). So that means that I have to then learn >> everything 6 times! > > Hmm... well soon I will be 26 + 4. Hah! Next year, I'll be 42. mark "in hex"

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centos iso to rfs_image
by Dilip Basavaraju 08 Jul '14

08 Jul '14

Dear all, 1. Is it possible to convert centos iso file to vmlinuz, initrd and rfs_raw.img. 2. Can I use only vmlinux, initrd and rfs_raw.img to install via pxeboot. Please share your information regarding this. Thanks and regards Dilip Kumar B L&T Technology Services Ltd www.LntTechservices.com<http://www.lnttechservices.com/> This Email may contain confidential or privileged information for the intended recipient (s). If you are not the intended recipient, please do not use or disseminate the information, notify the sender and delete it from your system.

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The easiest way for Fedora 14 to Centos 6 migration?
by Frantisek Hanzlik 08 Jul '14

08 Jul '14

I manage several Fedora 14 servers. They was not upgraded due to several reasons (systemd unreliability, K12LTSP support absence), some newer packages I was building & updating manually, some other (OpenOffice, Mozilla) was possible update from projects binaries. Now I consider the options to migrate them to Centos 6, possibly the easiest possible way. What I'd like is some as yum configuration files replacement of those from Fedora with files from Centos - and then simply do "yum update". Has anyone tried to do a similar migration? What procedure would you recommend? TIA, Franta Hanzlik

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Re: [CentOS] Cemtos 7 : Systemd alternatives ?
by Adrian Sevcenco 08 Jul '14

08 Jul '14

On 07/08/2014 04:06 PM, Reindl Harald wrote: > > Am 08.07.2014 14:58, schrieb Adrian Sevcenco: >> On 07/08/2014 04:22 AM, Always Learning wrote: >>> >>> On Mon, 2014-07-07 at 20:46 -0400, Robert Moskowitz wrote: >>> >>>> On 07/07/2014 07:47 PM, Always Learning wrote: >>>>> Reading about systemd, it seems it is not well liked and reminiscent of >>>>> Microsoft's "put everything into the Windows Registry" (Win 95 onwards). >>>>> >>>>> Is there a practical alternative to omnipresent, or invasive, systemd ? >>> >>>> So you are following the thread on the Fedora list? I have been >>>> ignoring it. >>> >>> No. I read some of >>> http://www.phoronix.com/scan.php?page=news_topic&q=systemd >>> >>> The systemd proponent, advocate and chief developer? wants to >>> abolish /etc and /var in favour of having the /etc and /var data >>> in /usr. >> err.. what? even on that wild fedora thread this did not come up!!! >> >> i will presume that you understood well your information source and you >> are actually know what you are referring to ... so, could you elaborate >> more about this?(with some references) >> i use systemd for some time (and i keep myslef informed about it) and i >> would need to know in time about this kind of change.. > > if you need to know about changes the read the systemd-devel list and announcements > like http://lists.freedesktop.org/archives/systemd-devel/2014-July/020903.html > > as so often the OP has no clue what he is talking about > because he ignores systemd as many other things completly > while think at the same time he can have a valid opinion > in details > > systemd-upstream discusses how to get /etc and /var in default > installs empty to contain *only user data* and no default > configurations which are placed below /usr and can be overriden > like systemd-units from the user > > the deeper reason is to achieve over long that a system can > boot without any configuration and so provide a clean way > for "vendor reset" in case of mobile devices, aplliances > and where ever you want to ship a defined environment which > can be reset at any point in time Thanks for info ... actually i am (pretty much) up to date with what is happening (i don't follow systemd-devel but i am following Lennart Poettering and Kay Sievers on g+) My remark was kind of tongue-in-chick with regard to "abolish" word.. And of the OP : the move of defaults to /usr is/was expected as from the beginning the usr consolidation was prepared in order to have a common system shared over network And about new mechanics of systemd: i can wait to see how seamless will be the use of chef/puppet tools on systemd systems. (and on any other cloud stacks) Adrian

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Re: [CentOS] [CentOS-announce] Release for CentOS-7 on x86_64
by Robert Moskowitz 08 Jul '14

08 Jul '14

On 07/07/2014 04:53 PM, Reindl Harald wrote: > > Am 07.07.2014 22:48, schrieb Robert Moskowitz: >> On 07/07/2014 04:28 PM, Jeremy Hoel wrote: >>> It's derived from Redhat 7,.. CentOS is always derived from Redhat >>> Enterprise Linux. Fedora is normally a preview of the next upcoming RHEL >>> release. >> Until recently, RHEL really lagged behind Fedora. With RHEL 7, they >> seemed to have taken on walking the talk and being as current as >> possible (F19 was the current release when RHEL7 development seemed to >> have started). It is great that this leap forward was made. Of course >> has the 'service' command been replaced with 'systemd'? That will be a >> big shock to Centos admins > what shock? > > systemd was introduced in Fedora 15 > current is Fedora 20 > most distributions switched to systemd > so there is nothing new And thus it is not in RHEL 6. If an admin has not been working with Fedora, then there is no experience with it. Plus it was easy to ignore systemctl in Fedora for a while, though by F18 it was hard to say the least. > > nobody forces you to upgrade to RHEL7 > RHEL6 is maintained for many years > > any Fedora release contains a wrapper for "service" > as well as RHEL7 does Yes the wrapper is there, but at least on Fedora, I notice that related items like chkconfig no longer worked as well, and I really needed to buckle down and learn systemctl. > > service httpd status > Redirecting to /bin/systemctl status httpd.service > httpd.service - Apache Webserver Which was a great hint to figure out what this systemctl was all about.

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Discuss July 2014