Comments for pixelchaos.net http://www.pixelchaos.net random bits for your terminal Wed, 10 Mar 2010 19:30:36 +0000 http://wordpress.org/?v=2.9.2 hourly 1 Comment on openais: an alternative to clvm with cman by Xen Fan http://www.pixelchaos.net/2009/04/23/openais-an-alternative-to-clvm-with-cman/comment-page-1/#comment-6834 Xen Fan Wed, 10 Mar 2010 19:30:36 +0000 http://www.pixelchaos.net/?p=106#comment-6834 Regardless of userid or the use of fakeroot, the dpkg-buildpackage gives a rules error. With fakeroot as root: fakeroot debian/rules clean /usr/bin/fakeroot: line 164: debian/rules: Permission denied dpkg-buildpackage: failure: fakeroot debian/rules clean gave error exit status 126 Without fakeroot as root: debian/rules clean Can't exec "debian/rules": Permission denied at /usr/bin/dpkg-buildpackage line 475. dpkg-buildpackage: failure: debian/rules clean failed with unknown exit code -1 With fakeroot as regular user: fakeroot debian/rules clean /usr/bin/fakeroot: line 164: debian/rules: Permission denied dpkg-buildpackage: failure: fakeroot debian/rules clean gave error exit status 126 I appreciate your help and apologize for the annoyance, but not being a debian package guy I've been banging my head on this for a while. I can't even figure out what it's trying to do. Regardless of userid or the use of fakeroot, the dpkg-buildpackage gives a rules error.

With fakeroot as root:

fakeroot debian/rules clean
/usr/bin/fakeroot: line 164: debian/rules: Permission denied
dpkg-buildpackage: failure: fakeroot debian/rules clean gave error exit status 126

Without fakeroot as root:

debian/rules clean
Can’t exec “debian/rules”: Permission denied at /usr/bin/dpkg-buildpackage line 475.
dpkg-buildpackage: failure: debian/rules clean failed with unknown exit code -1

With fakeroot as regular user:
fakeroot debian/rules clean
/usr/bin/fakeroot: line 164: debian/rules: Permission denied
dpkg-buildpackage: failure: fakeroot debian/rules clean gave error exit status 126

I appreciate your help and apologize for the annoyance, but not being a debian package guy I’ve been banging my head on this for a while. I can’t even figure out what it’s trying to do.

]]> Comment on openais: an alternative to clvm with cman by jcl http://www.pixelchaos.net/2009/04/23/openais-an-alternative-to-clvm-with-cman/comment-page-1/#comment-6833 jcl Wed, 10 Mar 2010 19:22:38 +0000 http://www.pixelchaos.net/?p=106#comment-6833 Xen Fan, If you are already root, you dont need to use -rfakeroot at all. Xen Fan,

If you are already root, you dont need to use -rfakeroot at all.

]]> Comment on openais: an alternative to clvm with cman by Xen Fan http://www.pixelchaos.net/2009/04/23/openais-an-alternative-to-clvm-with-cman/comment-page-1/#comment-6831 Xen Fan Wed, 10 Mar 2010 19:14:10 +0000 http://www.pixelchaos.net/?p=106#comment-6831 Yeah, I was confused because you did the same thing above: root@host:/usr/src/lm2-2.02.39# dpkg-buildpackage -rfakeroot -uc -b I'm not clear on where I need to become another user. A regular user won't be able to create the build dir in /usr/src. Yeah, I was confused because you did the same thing above:

root@host:/usr/src/lm2-2.02.39# dpkg-buildpackage -rfakeroot -uc -b

I’m not clear on where I need to become another user. A regular user won’t be able to create the build dir in /usr/src.

]]> Comment on openais: an alternative to clvm with cman by jcl http://www.pixelchaos.net/2009/04/23/openais-an-alternative-to-clvm-with-cman/comment-page-1/#comment-6830 jcl Wed, 10 Mar 2010 18:46:26 +0000 http://www.pixelchaos.net/?p=106#comment-6830 Xen Fan, Looks like youre trying to use fakeroot when youre already root. Xen Fan,

Looks like youre trying to use fakeroot when youre already root.

]]> Comment on openais: an alternative to clvm with cman by Xen Fan http://www.pixelchaos.net/2009/04/23/openais-an-alternative-to-clvm-with-cman/comment-page-1/#comment-6829 Xen Fan Wed, 10 Mar 2010 18:43:04 +0000 http://www.pixelchaos.net/?p=106#comment-6829 Thanks for the great writeup, however I'm having difficulty building this on lenny. At the dpkg-buildpackage stage I get this error. /usr/src/lvm2-2.02.39# dpkg-buildpackage -rfakeroot -uc -b dpkg-buildpackage: warning: using a gain-root-command while being root dpkg-buildpackage: set CFLAGS to default value: -g -O2 dpkg-buildpackage: set CPPFLAGS to default value: dpkg-buildpackage: set LDFLAGS to default value: dpkg-buildpackage: set FFLAGS to default value: -g -O2 dpkg-buildpackage: set CXXFLAGS to default value: -g -O2 dpkg-buildpackage: source package lvm2 dpkg-buildpackage: source version 2.02.39-7.3 dpkg-buildpackage: source changed by root dpkg-buildpackage: host architecture amd64 fakeroot debian/rules clean /usr/bin/fakeroot: line 164: debian/rules: Permission denied dpkg-buildpackage: failure: fakeroot debian/rules clean gave error exit status 126 Any ideas? Do you have a package anywhere for download? If I could get clvm going without all the other nonsense it would be amazing. Thanks! Thanks for the great writeup, however I’m having difficulty building this on lenny. At the dpkg-buildpackage stage I get this error.

/usr/src/lvm2-2.02.39# dpkg-buildpackage -rfakeroot -uc -b
dpkg-buildpackage: warning: using a gain-root-command while being root
dpkg-buildpackage: set CFLAGS to default value: -g -O2
dpkg-buildpackage: set CPPFLAGS to default value:
dpkg-buildpackage: set LDFLAGS to default value:
dpkg-buildpackage: set FFLAGS to default value: -g -O2
dpkg-buildpackage: set CXXFLAGS to default value: -g -O2
dpkg-buildpackage: source package lvm2
dpkg-buildpackage: source version 2.02.39-7.3
dpkg-buildpackage: source changed by root
dpkg-buildpackage: host architecture amd64
fakeroot debian/rules clean
/usr/bin/fakeroot: line 164: debian/rules: Permission denied
dpkg-buildpackage: failure: fakeroot debian/rules clean gave error exit status 126

Any ideas? Do you have a package anywhere for download? If I could get clvm going without all the other nonsense it would be amazing. Thanks!

]]> Comment on openais: an alternative to clvm with cman by /root.eu » Klastrowy LVM i Xen http://www.pixelchaos.net/2009/04/23/openais-an-alternative-to-clvm-with-cman/comment-page-1/#comment-4881 /root.eu » Klastrowy LVM i Xen Mon, 23 Nov 2009 19:19:50 +0000 http://www.pixelchaos.net/?p=106#comment-4881 [...] już chyba temat na odrębny wpis. Ku czemu innemu zmierzam. Mianowicie bardzo zainteresował mnie ten wpis. Okazuje się, że jest możliwe zmuszenie CLVM do działania bez skonfigurowanego RHCS! [...] [...] już chyba temat na odrębny wpis. Ku czemu innemu zmierzam. Mianowicie bardzo zainteresował mnie ten wpis. Okazuje się, że jest możliwe zmuszenie CLVM do działania bez skonfigurowanego RHCS! [...]

]]> Comment on openais: an alternative to clvm with cman by jcl http://www.pixelchaos.net/2009/04/23/openais-an-alternative-to-clvm-with-cman/comment-page-1/#comment-4412 jcl Fri, 23 Oct 2009 11:42:14 +0000 http://www.pixelchaos.net/?p=106#comment-4412 ezio, /var/log/openais is indeed empty on my installations. im not sure if you have to enable logging somehow in openais or not. there might be some way to configure openais/clvm timeout periods... i havent looked into that. its also possible that clvm assumes certain things about cman that arent true about openais and that is causing the problem. perhaps there have been improvements in the latest source code for both packages. another thing you could try, though its dangerous if you do modifications to the cluster lvm metadata from different nodes at the same time, would be to put each openais instance into its own ring. that would trick clvm into thinking it had a quorate cluster since each node is, in effect, the only node in the cluster. - jcl ezio,

/var/log/openais is indeed empty on my installations. im not sure if you have to enable logging somehow in openais or not.

there might be some way to configure openais/clvm timeout periods… i havent looked into that. its also possible that clvm assumes certain things about cman that arent true about openais and that is causing the problem. perhaps there have been improvements in the latest source code for both packages.

another thing you could try, though its dangerous if you do modifications to the cluster lvm metadata from different nodes at the same time, would be to put each openais instance into its own ring. that would trick clvm into thinking it had a quorate cluster since each node is, in effect, the only node in the cluster.

- jcl

]]> Comment on openais: an alternative to clvm with cman by ezio http://www.pixelchaos.net/2009/04/23/openais-an-alternative-to-clvm-with-cman/comment-page-1/#comment-4411 ezio Fri, 23 Oct 2009 10:31:47 +0000 http://www.pixelchaos.net/?p=106#comment-4411 Hi jcl, my SAN is not in a stable status. I could not configure the multipath service against my active-passive controllers yet, since I am waiting for a multipath compatible firmware upgrade. so my logs are full of errors because the nodes try to connect through FC connections to redundant devices which are not actually reachable. The fall of performance could by huge. Nevertheless I decided to test your environment, because I felt that your solution was excellent for our aims. Since the problem described is more frequent in my case, and my nodes are quite full of syslog errors due to the problems above, this could mean that the problem is related to timeout problems, performance of the SAN and ways to configure timeouts in the clvm and openais packages. Is /var/log/openais empty In your installation too ? I ordered 2 little AoE's too and am studying your article about it. Thanks. ezio Hi jcl,

my SAN is not in a stable status. I could not configure the multipath service against my active-passive controllers yet, since I am waiting for a multipath compatible firmware upgrade. so my logs are full of errors because the nodes try to connect through FC connections to redundant devices which are not actually reachable. The fall of performance could by huge. Nevertheless I decided to test your environment, because I felt that your solution was excellent for our aims.

Since the problem described is more frequent in my case, and my nodes are quite full of syslog errors due to the problems above, this could mean that the problem is related to timeout problems, performance of the SAN and ways to configure timeouts in the clvm and openais packages.

Is /var/log/openais empty In your installation too ?

I ordered 2 little AoE’s too and am studying your article about it.

Thanks.
ezio

]]> Comment on openais: an alternative to clvm with cman by jcl http://www.pixelchaos.net/2009/04/23/openais-an-alternative-to-clvm-with-cman/comment-page-1/#comment-4404 jcl Thu, 22 Oct 2009 12:58:35 +0000 http://www.pixelchaos.net/?p=106#comment-4404 ezio, I have seen some of the same problems actually. I have discovered that its possible to recover from it by simply restarting the openais/clvm/lvm stack in the correct order. My best guess at this point is that there is some kind of poor interaction between openais and clvm but I havent been able to test it much. The problem is very intermittent too. Some times it will occur twice in one day. Other times I can go weeks and not have the issue at all. I have plans for trying to get to the bottom of it but I dont have any more information than that at this time. If you discover anything, please post it here for others. Thanks! - jcl ezio,

I have seen some of the same problems actually. I have discovered that its possible to recover from it by simply restarting the openais/clvm/lvm stack in the correct order. My best guess at this point is that there is some kind of poor interaction between openais and clvm but I havent been able to test it much.

The problem is very intermittent too. Some times it will occur twice in one day. Other times I can go weeks and not have the issue at all.

I have plans for trying to get to the bottom of it but I dont have any more information than that at this time. If you discover anything, please post it here for others.

Thanks!
- jcl

]]> Comment on openais: an alternative to clvm with cman by ezio http://www.pixelchaos.net/2009/04/23/openais-an-alternative-to-clvm-with-cman/comment-page-1/#comment-4403 ezio Thu, 22 Oct 2009 11:00:47 +0000 http://www.pixelchaos.net/?p=106#comment-4403 Dear author, I liked very much the excellent solution you published, so I installed it inside my 3-node cluster, hoping it will be soon embodied inside the lenny distro. Just like you, we need Xen and only Xen. Maybe due to my ignorance, I need to solve some runtime problems yet. I do not think they are related to your solution, but not knowing the reason why they happen and method I can use to have a better idea, I'd like to know your opinion, if it were possible. I know nothing about openais and little about clvm. It happens to me that commands like lvcreate, lvremove get sometimes blocked. The only workaround seems to be killing the process from another session, kiiling clvm, aisexec and then starting openais and clvm again. After such operation the chance that the command works and produces effects visible from the same or another node is high even though not absolute. It is like a brutal manual fencing. I thought of a timeout problem for openais, but I have no info about its status and its operation. I also noticed that the installation created a directory /var/log/openais which is empty. There is no useful info in /var/log/syslog . What do you suggest to do ? Ciao and thank you for your patch. Ezio. Dear author,
I liked very much the excellent solution you published, so I installed it inside my 3-node cluster, hoping it will be soon embodied inside the lenny distro. Just like you, we need Xen and only Xen.

Maybe due to my ignorance, I need to solve some runtime problems yet. I do not think they are related to your solution, but not knowing the reason why they happen and method I can use to have a better idea, I’d like to know your opinion, if it were possible. I know nothing about openais and little about clvm.

It happens to me that commands like lvcreate, lvremove get sometimes blocked. The only workaround seems to be killing the process from another session, kiiling clvm, aisexec and then starting openais and clvm again. After such operation the chance that the command works and produces effects visible from the same or another node is high even though not absolute. It is like a brutal manual fencing.

I thought of a timeout problem for openais, but I have no info about its status and its operation. I also noticed that the installation created a directory /var/log/openais which is empty. There is no useful info in /var/log/syslog .

What do you suggest to do ?

Ciao and thank you for your patch.
Ezio.

]]>