Re: [CentOS-virt] CentOS 7 AMI Building
Ok, thanks so much! That'll do fine. The only other bits mentioned on http://wiki.centos.org/Cloud/AWS in Image Builder Notes were the random root password, SELinux enabled, and relabel at first boot, which are easy enough. Thanks so much, Jason On Fri, Apr 17, 2015 at 12:20 PM, Karanbir Singh mail-li...@karan.org wrote: I highly recommend actually looking at the images :) its just a minimal install with cloud-init from extras/ added in ( for 7, the 6 ones dont have cloud-init ). the installed content delivered from the minimal.iso and the ami's should be identical in pretty much every respect. If you really want a kickstart for it, I can build one, but just run a minimal.iso install, add cloud-init to the %packages and bob's your uncle. On 16/04/15 17:48, Jason Antman wrote: Yes... we currently use Packer to achieve a repeatable build process, from scratch. We'd like to replicate that and be able to build from scratch without spinning up an EC2 instance, in an automated way. I don't know how to phrase this, so apologies if it comes across wrong, I have immense respect for you personally and for CentOS... but, is it really that difficult to post the kickstarts and/or build scripts somewhere? Or at least enough of them to replicate something similar? Thanks, Jason On Thu, Apr 16, 2015 at 3:56 AM, Karanbir Singh mail-li...@karan.org mailto:mail-li...@karan.org wrote: On 04/14/2015 12:48 PM, Jason Antman wrote: Hello, I'm new to this list, but I noticed a post from March 30th inquiring about the build scripts for the official CentOS7 AMIs. I'm also interested in this; I'm tasked with (unfortunately) spinning up some VMs in our corporate VMWare environment that are as close as possible to the official CentOS7 AMIs. I could attempt to reverse-engineer them and do you need to do much more than qemu-img convert -O vmdk centos-genericcloud.qcow2 ? -- Karanbir Singh +44-207-0999389 tel:%2B44-207-0999389 | http://www.karan.org/ | twitter.com/kbsingh http://twitter.com/kbsingh GnuPG Key : http://www.karan.org/publickey.asc ___ CentOS-virt mailing list CentOS-virt@centos.org mailto:CentOS-virt@centos.org http://lists.centos.org/mailman/listinfo/centos-virt ___ CentOS-virt mailing list CentOS-virt@centos.org http://lists.centos.org/mailman/listinfo/centos-virt -- Karanbir Singh +44-207-0999389 | http://www.karan.org/ | twitter.com/kbsingh GnuPG Key : http://www.karan.org/publickey.asc ___ CentOS-virt mailing list CentOS-virt@centos.org http://lists.centos.org/mailman/listinfo/centos-virt ___ CentOS-virt mailing list CentOS-virt@centos.org http://lists.centos.org/mailman/listinfo/centos-virt
Re: [CentOS-virt] CentOS 7 AMI Building
I highly recommend actually looking at the images :) its just a minimal install with cloud-init from extras/ added in ( for 7, the 6 ones dont have cloud-init ). the installed content delivered from the minimal.iso and the ami's should be identical in pretty much every respect. If you really want a kickstart for it, I can build one, but just run a minimal.iso install, add cloud-init to the %packages and bob's your uncle. On 16/04/15 17:48, Jason Antman wrote: Yes... we currently use Packer to achieve a repeatable build process, from scratch. We'd like to replicate that and be able to build from scratch without spinning up an EC2 instance, in an automated way. I don't know how to phrase this, so apologies if it comes across wrong, I have immense respect for you personally and for CentOS... but, is it really that difficult to post the kickstarts and/or build scripts somewhere? Or at least enough of them to replicate something similar? Thanks, Jason On Thu, Apr 16, 2015 at 3:56 AM, Karanbir Singh mail-li...@karan.org mailto:mail-li...@karan.org wrote: On 04/14/2015 12:48 PM, Jason Antman wrote: Hello, I'm new to this list, but I noticed a post from March 30th inquiring about the build scripts for the official CentOS7 AMIs. I'm also interested in this; I'm tasked with (unfortunately) spinning up some VMs in our corporate VMWare environment that are as close as possible to the official CentOS7 AMIs. I could attempt to reverse-engineer them and do you need to do much more than qemu-img convert -O vmdk centos-genericcloud.qcow2 ? -- Karanbir Singh +44-207-0999389 tel:%2B44-207-0999389 | http://www.karan.org/ | twitter.com/kbsingh http://twitter.com/kbsingh GnuPG Key : http://www.karan.org/publickey.asc ___ CentOS-virt mailing list CentOS-virt@centos.org mailto:CentOS-virt@centos.org http://lists.centos.org/mailman/listinfo/centos-virt ___ CentOS-virt mailing list CentOS-virt@centos.org http://lists.centos.org/mailman/listinfo/centos-virt -- Karanbir Singh +44-207-0999389 | http://www.karan.org/ | twitter.com/kbsingh GnuPG Key : http://www.karan.org/publickey.asc ___ CentOS-virt mailing list CentOS-virt@centos.org http://lists.centos.org/mailman/listinfo/centos-virt
Re: [CentOS-virt] Seeing dropped packets / tcp retrans on latest 4.4.1-10el6
Hi All, I've tracked this down... We do rate limiting of our vms with a mix of ebtables/tc. Running these commands (replace vif1.0 with the correct vif for your VM) will reproduce this: ebtables -A FORWARD -i vif1.0 -j mark --set-mark 990 --mark-target CONTINUE tc qdisc add dev bond0 root handle 1: htb default 2 tc class add dev bond0 parent 1: classid 1:0 htb rate 1mbit tc class add dev bond0 parent 1: classid 1:990 htb rate 1mbit tc filter add dev bond0 protocol ip parent 1:0 prio 990 handle 990 fw flowid 1:990 Note that the speed limits being applied here are 10gb and I'm testing this on a 1gb network, so TC shouldn't really be doing anything here except letting the packets through. These same commands worked fine on gentoo xen 4.1 / kernel 3.2.57, compared to this now not working on centos xen 4.4.1 / kernel 3.10.68. Easiest way to reproduce is simply generate a large file, scp it to a remote host and on the remote host run: tshark -Y tcp.analysis.duplicate_ack_num If you run the ssh in a loop + tshark in another window, you can see the Dup ACK's begin immediately after adding the last filter rule: 25790294 1752.756733 xxx.xxx.xxx.13 - xxx.xxx.xxx.205 TCP 78 [TCP Dup ACK 25790286#4] ssh 51515 [ACK] Seq=15994 Ack=50769840 Win=1544704 Len=0 TSval=738150929 TSecr=4294944346 SLE=50785768 SRE=50790596 25790296 1752.756742 xxx.xxx.xxx.13 - xxx.xxx.xxx.205 TCP 78 [TCP Dup ACK 25790286#5] ssh 51515 [ACK] Seq=15994 Ack=50769840 Win=1544704 Len=0 TSval=738150929 TSecr=4294944346 SLE=50785768 SRE=50792044 - Nathan ___ CentOS-virt mailing list CentOS-virt@centos.org http://lists.centos.org/mailman/listinfo/centos-virt
