devel March 2016

devel@lists.centos.org

47 participants
47 discussions

How to build CentOS 7 AMI
by Alan Ivey 04 Mar '16

04 Mar '16

Hi everyone, I'd like to revisit the thread about how the CentOS 7 AMIs are created ( https://lists.centos.org/pipermail/centos-devel/2015-July/013652.html) and see if the process can be published in the https://github.com/CentOS/sig-cloud-instance-build repository or another relevant location. With CentOS 7 AMIs only being available in the Marketplace, all resulting EC2 instances have the Marketplace codes attached to the EBS volumes. A significant restriction of this is that a resulting image cannot be the non-primary volume of an instance unless it is powered down. This presents itself to be a problem in at least the following scenarios: - Unable to attach a CentOS 7 boot volume to another instance for repair without either creating a temporary instance or shutting down an existing one. For example, if you messed up the /etc/sudoers file and logged out, and wanted to repair, you would not be able to repair by mounting to another instance and editing the file without incurring additional (albeit small) cost, or having an existing instance be temporarily unavailable. - The "amazon-chroot" Packer Builder ( https://www.packer.io/docs/builders/amazon-chroot.html) does not work because it starts by mounting a copy of the snapshot tied to the AMI as part of a scripted operation and therefore cannot power off to do so Custom AMIs, snapshots, copied EBS volumes, etc, all have the marketplace codes copied to them and inherit the restrictions. If an org was to use these features for automating environments and was disconnected from the original Marketplace agreement, they may be unaware of this limitation. I would also appreciate being able to have the additional transparency of seeing how an AWS AMI is created as the docker/openstack/etc images from the repository referenced above. This would be useful in environments with regulatory compliance concerns, such as AWS GovCloud, HIPAA, FedRAMP, etc. I understand the benefit that Marketplace registrations allow for the ability to notify users of any changes, and I am not necessarily advocating for switching away from the Marketplace as the primary AMI location. I would like to be provided the opportunity to build a private AMI in the exact same procedure as the official image so as to avert the restrictions provided by the Marketplace. *[Note: I previously posted this question to centos-virt <https://lists.centos.org/pipermail/centos-virt/2016-February/004907.html>, but I did not receive any feedback and I have since noticed that **https://wiki.centos.org/SpecialInterestGroup/Cloud <https://wiki.centos.org/SpecialInterestGroup/Cloud> refers to the CentOS-Devel list for discussion. My apologies to subscribers of both lists.**]* Thank you, Alan

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Re: [CentOS-devel] CentOS-devel Digest, Vol 133, Issue 4
by Brady Wied 04 Mar '16

04 Mar '16

Hi, Sorry for omitting the license. It's a BSD 2 clause and I've posted it here: https://github.com/wied03/centos-package-cron/blob/master/LICENSE.txt Hopefully that license is OK. -Brady On Fri, Mar 4, 2016 at 5:00 AM, <centos-devel-request(a)centos.org> wrote: > Send CentOS-devel mailing list submissions to > centos-devel(a)centos.org > > To subscribe or unsubscribe via the World Wide Web, visit > https://lists.centos.org/mailman/listinfo/centos-devel > or, via email, send a message with subject or body 'help' to > centos-devel-request(a)centos.org > > You can reach the person managing the list at > centos-devel-owner(a)centos.org > > When replying, please edit your Subject line so it is more specific > than "Re: Contents of CentOS-devel digest..." > > > Today's Topics: > > 1. kickstart files for centos 7 cloud images (Matt Bacchi) > 2. RPM Submission - Centos Package Cron (Brady Wied) > 3. Re: RPM Submission - Centos Package Cron (Nux!) > 4. Re: RPM Submission - Centos Package Cron (Sven Kieske) > > > ---------------------------------------------------------------------- > > Message: 1 > Date: Thu, 3 Mar 2016 13:40:04 -0500 > From: Matt Bacchi <mbacchi(a)gmail.com> > To: centos-devel(a)centos.org > Subject: [CentOS-devel] kickstart files for centos 7 cloud images > Message-ID: > < > CANddqJcxy2jpToM06LxxH0jKzr9EAozwHJX9ku2Gey-Vg96htw(a)mail.gmail.com> > Content-Type: text/plain; charset="utf-8" > > Hello, > > I'm wondering where I can find the kickstart files used to create the cloud > images here: > > http://cloud.centos.org/centos/7/images/ > > I've created my own centos 7 image from kickstart but the instance doesn't > broadcast dhcp requests (verified using tcpdump.) If I launch an instance > using the image you provide (CentOS-7-x86_64-GenericCloud-1511.qcow2 > < > http://cloud.centos.org/centos/7/images/CentOS-7-x86_64-GenericCloud-1511.q… > >) > it does broadcast a dhcp request and then comes up on the network. My > kickstart file does indicate "network --bootproto=dhcp --onboot=on", but I > want to compare it to yours which is working as I would expect. > > Thanks in advance. > > -Matt >

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kickstart files for centos 7 cloud images
by Matt Bacchi 03 Mar '16

03 Mar '16

Hello, I'm wondering where I can find the kickstart files used to create the cloud images here: http://cloud.centos.org/centos/7/images/ I've created my own centos 7 image from kickstart but the instance doesn't broadcast dhcp requests (verified using tcpdump.) If I launch an instance using the image you provide (CentOS-7-x86_64-GenericCloud-1511.qcow2 <http://cloud.centos.org/centos/7/images/CentOS-7-x86_64-GenericCloud-1511.q…>) it does broadcast a dhcp request and then comes up on the network. My kickstart file does indicate "network --bootproto=dhcp --onboot=on", but I want to compare it to yours which is working as I would expect. Thanks in advance. -Matt

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AltArch ppc (32-bit) multilib support available
by James O'Connor 02 Mar '16

02 Mar '16

The ppc (32-bit) big endian power7 optimized rpms were signed and pushed to the ppc64 updates repo yesterday http://mirror.centos.org/altarch/7.2.1511/updates/ppc64/Packages/ We will find a place similar to buildlogs.centos.org to push all the ppc rpms, mock configs and build logs used in to the bootstrap process.

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dm-cache not caching data on 3.18.21-17.el6.x86_64
by Thanos Makatos 02 Mar '16

02 Mar '16

I'm evaluating dm-cache on kernels 3.18.21-17.el6.x86_64 (Xen 4) and 2.6.32-573.7.1.el6.x86_64 (KVM). The test I do is a simple sequential read using dd(1). read_promote_adjustment and sequential_threshold have been set to 1 and 0, respectively. For the 2.6.32 kernel, all seems to be working fine, "#usedcacheblocks" correctly reflects the number of cached blocks based on what I'm reading with dd(1) performance is pretty much native SSD performance. However, the same test on the 3.18.21-17.el6.x86_64 kernel results in "#usedcacheblocks" being stuck to "2" and no performance improvement is observed. Any ideas what could be wrong? How can I further debug this? -- Thanos Makatos

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[Discussion-CCCP] Pulp/crane story
by Mohammed Zeeshan 02 Mar '16

02 Mar '16

Hi, I just got off a half hour discussion with the pulp guys for the CentOS Container Pipeline registry story. 1. docker save x.tar produces a v1 tarball and not a v2 tarball 2. This tarball doesnt contain metadata such as tags and so on. 3. docker pull from docker 1.6 assumes the registry being pulled from is a v2 registry 4. v1 registry has been depricated. 5. Currently, the only way to get a v2 repo into pulp or any other registry is to first push it to docker registry and then sync our registry to it. I seriously am beginning to hate docker. -- *Mohammed Zeeshan Ahmed, * B.E Computer Science Engineering Certified IT & Cloud Architect & RHCSA +919986458839 Bengaluru, India https://mohammedzee1000.wordpress.com/ <http://mohammed-zeeshan.strikingly.com>

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[Cloud SIG] Meeting Thursday, 15:00 UTC
by Rich Bowen 01 Mar '16

01 Mar '16

A reminder: We will hold our weekly CentOS Cloud SIG meeting on the #centos-devel IRC channel, on Freenode, at 15:00 UTC on Thursday. The agenda for this meeting may be found at https://etherpad.openstack.org/p/centos-cloud-sig -- Rich Bowen - rbowen(a)redhat.com OpenStack Community Liaison http://rdoproject.org/

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devel March 2016