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TLS for all CentOS websites but not for smtp?
by Kai Bojens 20 Aug '15

20 Aug '15

Hello everybody, I just got the email about the enforcing of HTTPS for the CentOS Websites which I really appreciate: „The CentOS Project infra team has decided to implement TLS wherever we can (…)” Does anybody know if and when mail.centos.org will be able to deliver its mails with STARTTLS? There seems to be no support for STARTTLS at all: $: openssl s_client -connect mail.centos.org:25 -starttls smtp (…) didn't found starttls in server response, try anyway...

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CentOS 7 PV kernel
by Venkateswara Rao Dokku 20 Aug '15

20 Aug '15

HI, Is the CentOS 7 PV kernel available? I installed latest CentOS 7 & I found out that it is a HVM guest. So, if we wanted to have CentOS PV guest for CentOS 7, is there any specific steps to follow? or the same kernel will work as both PV & HVM? -- Thanks & Regards, Venkateswara Rao Dokku.

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CentOS-announce Digest, Vol 126, Issue 10
by centos-announce-request＠centos.org 20 Aug '15

20 Aug '15

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. Infra : TLS redirection for centos.org websites. (Fabian Arrotin) ---------------------------------------------------------------------- Message: 1 Date: Wed, 19 Aug 2015 14:25:44 +0200 From: Fabian Arrotin <arrfab(a)centos.org> To: centos-announce(a)centos.org Subject: [CentOS-announce] Infra : TLS redirection for centos.org websites. Message-ID: <55D475C8.6000207(a)centos.org> Content-Type: text/plain; charset=utf-8 -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 The CentOS Project infra team has decided to implement TLS wherever we can, so we decided to force a redirection of plain http traffic to https version for the next websites : - - https://{www}.centos.org (main website) - - https://www.centos.org/forums (main forums) - - https://fr.centos.org (French forums) - - https://bugs.centos.org (CentOS Bugs tracker) - - https://wiki.centos.org Should you encounter an issue, feel free to either report it on https://bugs.centos.org, or in #centos-devel on irc.freenode.net. on behalf of the Infra team, - -- Fabian Arrotin The CentOS Project | http://www.centos.org gpg key: 56BEC54E | twitter: @arrfab -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.22 (GNU/Linux) iEYEARECAAYFAlXUdcgACgkQnVkHo1a+xU6hqgCePuVdwnQPWUz0ppS5rBUQUB8c kNkAoIj2VIojQx1SWEf+bh1wSh69QKLz =3Hof -----END PGP SIGNATURE----- ------------------------------ _______________________________________________ CentOS-announce mailing list CentOS-announce(a)centos.org http://lists.centos.org/mailman/listinfo/centos-announce End of CentOS-announce Digest, Vol 126, Issue 10 ************************************************

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Re: [CentOS] new laptop: DVD or Blu-ray
by ken 20 Aug '15

20 Aug '15

On 08/20/2015 07:35 AM, Nicolas George wrote: >> Second, it [Blu-ray] has dmr crap in it that >> >might require binary only spyware to work. > DVD-Video has them too, the only difference is that the crypto in the DRM > for DVD is terribly broken. "Broken" in the sense that data is corrupted or in the sense that the DMR is crackable?

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Fwd: ABRT Daemon/sosreport disaster
by Robert Inder 20 Aug '15

20 Aug '15

On Sunday, I did a "yum update" which installed kernel 2.6.32-573.3.1.el6.i686 on half a dozen virtual machines running CentOS 6.7. Since then, two of them have gone into "meltdown", and started spewing "ABRT Daemon" emails: one on Tuesday, and one tonight. The machines have a very light workload -- one runs "trac", and a handful of development systems, for a small team of developers. The other is primarily a git repository. So, aside from housekeeping jobs, both machines are more-or-less idle. Both machines generated SEVERAL HUNDRED "ABRT Daemon: a crash has been detected again" email messages in something over an hour. (That said, one of the two machines sent a (single) "crash detected": it had the same "missing module" error message, but only one message was generated) I include a sample message below. When I logged on to the machines when they were in "mailing frenzy", the only processes that "top" showed me using any CPU were "sosreport" and "abrtdaemon". They seemed to be vying for "top spot". In each case, I rebooted the machine, and all is now calm. But I am worried that it will affect other, more "visible" ideas. So, Q1: Is this a known problem? Q2: And how do I stop this happening again? Roll back to a previous version of something? Disable abrt? What? Robert. ---------- abrt_version: 2.0.8 cmdline: /usr/bin/python /usr/libexec/abrt-action-generate-machine-id -o /var/spool/abrt/pyhook-2015-08-18-10:33:29-10484/machineid executable: /usr/libexec/abrt-action-generate-machine-id hostname: XXX.XXXXXXXXXXX.co.uk kernel: 2.6.32-573.3.1.el6.i686 last_occurrence: 1439890409 time: Tue 18 Aug 2015 10:33:44 BST uid: 0 backtrace: :abrt-action-generate-machine-id:24:<module>:ImportError: No module named argparse : :Traceback (most recent call last): : File "/usr/libexec/abrt-action-generate-machine-id", line 24, in <module> : from argparse import ArgumentParser :ImportError: No module named argparse : :Local variables in innermost frame: :__builtins__: <module '__builtin__' (built-in)> :__file__: '/usr/libexec/abrt-action-generate-machine-id' :__package__: None :sys: <module 'sys' (built-in)> :__name__: '__main__' :__doc__: 'This module provides algorithms for generating Machine IDs.\n' -- Robert Inder, 0131 229 1052 / 07808 492 213 Interactive Information Ltd, 3, Lauriston Gardens, Edinburgh EH3 9HH Registered in Scotland, Company no. SC 150689 Interactions speak louder than words

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Centos7 Kernel Panic
by Sachin Gupta 19 Aug '15

19 Aug '15

Hello Everyone, I have prepared following isolinux.cfg. default linux label linux kernel /vmlinuz append initrd=/initrd.gz But kernel panics with the standard message 'Kernel panic - not syncing: No init found'. Linux kernel version is 3.10. I tried to read the init.txt too.But could not figure out the issue. Can you please help me figure out the problem ? Thanks Sachin

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Optimum Block Size to use
by Jatin Davey 19 Aug '15

19 Aug '15

Hi All We use CentOS 6.6 for our application. I have profiled the application and find that we have a heavy requirement in terms of Disk writes. On an average when our application operates at a certain load i can observe that the disk writes / second is around 2 Mbps (Average). The block size set is 4k ******************* [root@localhost ~]# blockdev --getbsz /dev/sda3 4096 ******************* OS , Kernel Version: ***************** [root@localhost ~]# uname -a Linux localhost 2.6.32-504.el6.x86_64 #1 SMP Wed Oct 15 04:27:16 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux [root@localhost ~]# cat /etc/*release CentOS release 6.6 (Final) CentOS release 6.6 (Final) CentOS release 6.6 (Final) ***************** File-System being used: ******************** [root@localhost ~]# df -T Filesystem Type 1K-blocks Used Available Use% Mounted on /dev/sda3 ext3 100934056 20298152 75508688 22% / /dev/sda1 ext3 198337 34459 153638 19% /boot tmpfs tmpfs 16440152 0 16440152 0% /dev/shm ********************* I have a few queries with respect to the block size being set in the system: 1. Is 4k the optimum block size considering the amount of writes / second the application performs ? 2. How do i find out the optimum block size given the application load in terms of reads / writes per second ? 3. If there is a better block size that i can use , Can you suggest one ? 4. What are the pros / Cons of changing the default block size ? 5. We use ext3 as the file system for the partition which has heavy writes per second , Should we migrate it to ext4 ? Any pros / cons for it ? Appreciate any response / pointers in this regard. Thanks Jatin

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Firewalld broken on Centos7?
by Andrew Holway 19 Aug '15

19 Aug '15

Hi, I have a standard Centos7 AMI. Can anyone tell me whats happening here? Thanks, Andrew Aug 19 11:17:23 master dhclient[22897]: bound to 10.141.10.49 -- renewal in 1795 seconds. Aug 19 11:17:24 master network: Determining IP information for eth0... done. Aug 19 11:17:24 master network: [ OK ] Aug 19 11:17:24 master systemd: Started LSB: Bring up/down networking. Aug 19 11:23:43 master firewalld: 2015-08-19 11:23:43 ERROR: Failed to apply rules. A firewall reload might solve the issue if the firewall has been modified using ip*tables or ebtables. Aug 19 11:23:43 master firewalld: 2015-08-19 11:23:43 ERROR: '/sbin/iptables -D INPUT_ZONES -t filter -i eth0 -g IN_public' failed: iptables: No chain/target/match by that name. Aug 19 11:23:43 master firewalld: 2015-08-19 11:23:43 ERROR: COMMAND_FAILED: '/sbin/iptables -D INPUT_ZONES -t filter -i eth0 -g IN_public' failed: iptables: No chain/target/match by that name. Aug 19 11:35:58 master yum[23685]: Erased: cloud-init-0.7.5-10.el7.centos.1.x86_64

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shared memory - shmmax - shmall - page_size
by Michael H 19 Aug '15

19 Aug '15

Hi List, I'm tuning up a new database server and I'm finding very mixed information online. Here are the default shmmax and shmall from my new system cat /proc/sys/kernel/shmmax 4294967295 cat /proc/sys/kernel/shmall 268435456 SHMALL is close enough to being SHMMAX / 16. Now, everything I'm finding online tells me that SHMALL = SHMMAX / PAGE_SIZE. default page size is 4096. Has something changed in this calculation? should the defaults be set on SHMALL = SHMMAX / 16?? I'm running CentOS Linux release 7.1.1503 (Core), my old database is running CentOS release 6.6 (Final) and I'm seeing the same calculations there too. Can somebody please point me in the right direction, I've had a look at pgtune here http://pgtune.leopard.in.ua/, I will not be using the 'default' calculated configuration that it suggests but I noticed the shmall = shmmax / page_size (4096). I'll benchmark with both calculations but I would really appreciate some confirmation on this. thanks Michael

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[OT] C7 and php mkdir
by Alessandro Baggi 19 Aug '15

19 Aug '15

Hi list, I've a problem using PHP mkdir() with apache on C7. I'm trying to create a directory under a specified directory in the tree of my vhost, and mkdir create this directory but when I try to create a file in this dir I get error on permission. For directory creation I use permission 0777 for max perms to ensure that it works but I get invalid perm: dr----x--t. 2 apache apache ... I've tried also using: $old = umask(0); mkdir.... umask($old); with result: dr------wT. 2 apache apache ... Tried also chmod with umask(), same result. Selinux is disabled. Can someone point me in the right direction?. Thanks in advance.

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