As I was updating machines today, I was wondering... Is there some way to cache the RPM files locally that yum is grabbing? Like many, I have a number of VMs I run, and it most updates are the same between the nodes. I'm guessing I'd need some sort of http cache? Just looking for pointers, not sure what I'm looking for, however.
View 4 RepliesI'm trying to work with a project manager and some hardware guys and all of us are trying to get a grasp on the UEC.
1. Can a VM span multiple nodes?
2. If a website scales beyond 100% CPU on a node, does it automatically spill over to another node and start using processing power there?
3. Do I have to rewrite the code of my web app (such as WordPress) so that it works in a private cloud?
4. Does KVM support virtual memory such that when I run out of RAM it uses paging?
5. How is UEC any different than me bringing up several servers with several VMs inside, and then moving VMs around as I need? Is it really a cloud where the VMs exist in a cloud, not necessarily a node?
6. If I power off a node while it's hot, how can I assure myself that the data will be okay?
7. Do I want to use SCSI attached RAID, or NAS, or NFS? We're simply trying to host thousands of blogs and LAMP sites in a way that we can handle spike loads.
8. Do I attach the disk volumes to the cluster controller and then run a command such that the nodes can mount those virtual volumes?
9. Do I need to run another command on the VMs to mount volumes that the nodes can see?
10. What is the role of the storage controller and how is it separate from the cluster controller?
11. How many systems, minimum, do we need to get this tested out?
12. For testing purposes, can I install UEC on an Intel P4 server and then a node on Intel P3 server -- even with some limitations?
13. Let's imagine I have 5 node servers, and one catches fire and is a total loss. Can I get those VMs back and get that data back? What would have to be the proper config to make that happen?
I am trying to create a local repository of installed RPMs on my workstation. Using the 'rpm -qa' I can gather the installed RPMs on my workstation. Is there a way for me download all these RPMs using the output of 'rpm -qa'? 'yum --downloadonly' will allow me the option of downloading without installing. Since the installed RPMs are not cached in my workstation I have to download these RPMs again. If I have a local repo then it will be easier for me restore my installation without having to rediscover the packages needed. I am looking for how I can download multiple RPMs.
View 5 Replies View RelatedMy requirement is to route ssh sessions from a single head node to multiple slave nodes. So what i want is, for a client there is just one point of entry (master/head node) to ssh into, it evaluates the load on the slave nodes connected on to internal network and routes the ssh session, kind of a ssh load balancer. what open source solution i can apply for my problem?
View 1 Replies View RelatedMy requirement is to route ssh sessions from a single head node to multiple slave nodes. So what i want is, for a client there is just one point of entry (master/head node) to ssh into, it evaluates the load on the slave nodes connected on to internal network and routes the ssh session, kind of a ssh load balancer. Do you have any idea what open source solution i can apply for my problem?
I have tried using LVS piranha, it works well for http and https load balancing but not for ssh load balancing.
I have a home network with 6+ x86_64 machines, all with similar setups. In the past (FC10 and before), I've had common package repositories (e.g /var/cache/yum/fedora/packages) shared via NFS with all the machines (and with keepcache=1 in /etc/yum.conf). That way, a given RPM only got downloaded once; the other machines would then pull it from my local package repository. And I don't mind the disk usage of keeping one copy of all my old RPMS around.
It seems that while DRPMS is great for a single machine, it doesn't make sense in my case. If I have to download the DRPM 6 times (and take the time/CPU hit to recreate the RPM 6 times), I might as well have downloaded the RPM once and been done with it. Is there a not-too-convoluted method to keep a common package repository across multiple machines even with DRPMS? Or, better, to have that first downloading machine pull a DRPM, generate the RPM, then save the RPM in the local shared repository?
well sorry I'm new in this but I just made my cluster with about 4 good machines each with 2 or more gbs of memory and dual-core processor but the question is i can install an operating system in nodes as having the frontend or not different if possible, and how i can do it because i don't now how and i don't find material and tutorials that can help me..
View 3 Replies View RelatedI'd like to confirm if the latest updates of a couple of rpms is causing me a problem. I'd like to downgrade these rpms to an intermediate version (greater than the original F11 versions, but less than the latest version). I've looked on a few mirrors, and all I can find is the latest update. Are intermediate versions of an rpm discarded when they're replaced with new versions? Are these intermediate versions available some place?
The two rpms I'm interested in are:
gstreamer-plugins-good-0.10.16-1.fc11.i586
gstreamer-plugins-base-0.10.25-1.fc11.i586
I have multiple machines at home (well, 4 in all). They are all running Fedora 10. After installation, there is usually another gig or so of upgrades that need to be applied for patches, security, etc. My broadband link is painfully slow and downloading a gig can take 2-3 hours sometimes (other times I get lucky and it will only take an hour). Is it possible to upgrade the packages from one machine based on the packages on another machine, for example, if I have downloaded all of the base packages on to the fileserver, but not on to the laptop.
Is there any software that I could use by which I could use the fileserver to upgrade the laptop (effectively like a rsync, but with rpms) and only go to the internet for the few that the fileserver does not have, but the laptop still requires? I was once told that "up2date" was an option, but that seems to be quite old and there may be options in rpm or yum, but they are not clear as I would expect to have to set up some kind of service on the fileserver for the laptop to connect to.
I have an annoying problem with a 2 nodes cluster that I don't understand.
One of my server is totally shutdown.
When I start cman after a reboot on the other server, it hangs on "Starting fencing...". The process which is actually hanging is : /sbin/fence_tool -w -t 300 -m 45 join
When I start this program manually, I get this output :
# /sbin/fence_tool -w -t 300 -m 45 join
Waiting for all 2 nodes to be members
Waiting for all 2 nodes to be members
Waiting for all 2 nodes to be members
Waiting for all 2 nodes to be members
(and so on...)
What I don't understand is why the fence_tool program wait for the 2nd node to join the cluster and don't fence the other node.
Here is my cluster.conf :
<?xml version="1.0"?>
<cluster name="ctpsrv-bdd" config_version="7">
<fence_daemon clean_start="0" post_fail_delay="0" post_join_delay="20"/>
<cman expected_votes="1" two_node="1"/>
[Code]....
Would it be a good idea to edit the cman startup script and remove the "-w" option of command fence_tool join, so the command do not hang up ?
Have project to move to RHEL5 with Oracle11g. During process, went to Red Hat Network and they were not currently available. Is there another source of RPM's for installation on RHEL5?
View 1 Replies View RelatedDoes anyone know where we can get the rpms (x86_64) for MySQL v4.0.26 or 27?
We are in the process of upgrading a very old server to CentOS 5 and need to retain this version. We still have a lot of clients that utilize this version.
what i need, I got two servers for about 4000 users and 300 servers and well the guy never setup dns caching right, so im redoing it. Now my goals
1) DNS cache
2) Transparent Squid Cache only
3) Load Balance - at switchlevel
Upgraded Hardrives to SSD 2x32gb each server 4gb of ram 2x Dell poweredge 850's - p4 2.8 (single cores) So any advise , pointers , expeirnces and best ways to do this being both server will do both dns caching and squid! Also is bind9 the best for this?? i seen stuff about DNSmasq what performs better( i dont need DHCP)
I have been challenged to install CentOS occupying just 200 MB. As for now, I installed the OS with only first CD.
Just put :
@core
under %package directive in ks.cfg. I can see the space as of now is:
Code:
# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/sda3 13G 740M 12G 9% /
/dev/sda1 99M 12M 83M 12% /boot
tmpfs 125M 0 125M 0% /dev/shm
I need to make it to atleast 300MB.I can see those RPM lying in Linux Box:
Code:
df -hyum remove 389*df -hyum remove *ldap*df -hrpm -qa --qf '%11{SIZE} %{NAME}
' | sort -k1n
0 basesystem
0 filesystem
[code]...
I will remove java, selinux-* but what other package I can remove.
Note: I dont need any application to run but just bare OS.
I wanted to upgrade my Apache from 2.2.3 to 2.2.4 because some application issues. where we can get Apache 2.2.4 rpms for CentOS/RHEL build? I say 2.2.4 rpms in Fedora repositories? Will fedora builds work in CentOS/RHEL?
View 4 Replies View RelatedIs there a list of RPMs with known vulnerabilities? I was hoping to run some scripts across the list of currently installed packages vs such a list of vulnerable, to get an idea of what systems need attention. And no, just updating everything is neither an option, nor possible. My servers don't have access (nor do I want them to) to the outside world. Further, being production systems, I can't cause a disruption outside of scheduled down time, and due to running commercial software I can't upgrade some packages due to vendor support issues.
View 1 Replies View RelatedThere appears to be three rpms duplicated between the base repo and the updates repo:
gnome-python2-gtkhtml2-2.14.2-6.el5.x86_64.rpm
gnome-python2-extras-2.14.2-6.el5.x86_64.rpm
gnome-python2-libegg-2.14.2-6.el5.x86_64.rpm
This causes a big problem for Spacewalk as the packages are non-unique among channels.
I'm assuming these should be in base but not updates?Can they be removed to address this issue?
Aside from a few minor issues, I've been happy with VLC 0.9.9.
I recently did a yum update to get to Centos 5.5. I've got yum pointed to Dag.
Everything worked fine, until I restarted VLC 0.9.9.
In the update it looks like ffmpeg was updated to the 6.X branch, x264, and how vlc 0.9.9 was recompiled.
wait wait wait.. let me clarify, vlc 0.9.9 still works, but a key function in it that i use has broken.
I am able to do a yum downgrade on x264 and ffmpeg, but I am unable to downgrade VLC because it tells me there is no down grade path. How do I go about requesting the previous version of VLC be added back to Dags RMP site?
I spent sometime hacking on things the last 2 days, and was able to compile using the same ./configure options that were compiled from Dag with ffmpeg 5.2, and x264 and I get them to compile cleanly. VLC 0.9.9 source compiles and the errors I'm hitting go away.
I don't think the ffmpeg 6.X rmp is broken, i just think its to new for vlc 0.9.9 and breaks certain functionality.
I have the following problem. I downloaded openoffice 3 decompressed to the RPMs directory and by using command "rpm -Uvh *.rpm" installed all packages. When I look to the yumex so I can see single installed rpm's. That is OK. BUT I cant start openoffice because I dont know where are executable files. where is their location and where is default location for all installed programs(from RPM)?
View 7 Replies View RelatedWe have an appliance with image being installed from CD/DVD installation
This appliance image is based on CentOS 4.7 kernel/installer/etc. Everything works fine, we ship this product for about 2 years. Recently I had to move it (port everything) to CentOS 5.5 Everything went fine and it works fine except one minor thing )) We can't install it from CD/DVD image yet. Actually it start fine, finds kickstart file, creates partitions correctly, copies install image to harddrive, but fails the next step when it tries to install RPM's
The message we get:
Quote:
the file termcap-5.5-1.20060701.1.noarch.rpm cannot be opened. This is due to a missing file, a corrupt package or corrupt media. Please verify your installation source. If you exit your system will be left in an inconsistent state that will likely require re-installation"
Does anyone know where I can find RHEL compatible rpms for Bind 9.7 and DHCPD 4.1?
View 1 Replies View RelatedI have installed Centos 5.3 64 bit version and run yum update so the system is up to date. However, I have noticed the kernel version that is installed is:
uname -a
Linux elektra.chemresearch 2.6.18-164.el5 #1 SMP Thu Sep 3 03:28:30 EDT 2009 x86_64 x86_64 x86_64 GNU/Linux
and when attempting to install from ATrpm.net the nvidia driver I get this message:
yum install nvidia-graphics169.07 nvidia-graphics169.07-kmdl-`uname -r`
...
Missing Dependency: /boot/vmlinuz-2.6.18-164.2.1.el5 is needed by package 1:nvidia-graphics169.07-kmdl-2.6.18-164.2.1.el5-169.07-94.el5.x86_64 (atrpms)
Now, yum says the kernel is up to date so how can I get the nvidia driver rpms to install? The entries in /boot are:
vmlinuz-2.6.18-128.el5
vmlinuz-2.6.18-164.el5
I have checked to make sure that the update repo is enabled. There were quite a few updates applied after the initial installation and the initial kernel was updated as the yum log indicates and also the entries in /boot.
I have a CentOS 5.3 box with three network interfaces in it. Each interface is attached to a separate VLAN and I want traffic to stay on each network segment.What I can�t figure out is why I cannot get each interface to have its own gateway and everything gets sent through the default gateway.The basically takes my possible 3Gb total bandwidth and throws it down a single 1Gb pipe.Then on top of that, if I take down the interface (ifdown) that has the current default gateway,I loose contact to the other two interfaces.When I look at the routes, each one of the interfaces shows the gw as 0.0.0.0 and defers to the default route. So I delete the route and try to add a new route with:
[root@testsan ~]# ip route add 10.1.15.0/24 via 10.1.15.1 dev eth2
but end up with the error:
RTNETLINK answers: Network is unreachable
[root@testsan sysconfig]# cat network
NETWORKING=yes
NETWORKING_IPV6=no[code].....
I have a Bind DNS caching-only server setup that is working. I am bringing up a new AD domain controller that will also be a DNS server for that AD but I don't want it responding to any DNS queries except those that are AD related.So, my goal is to leave this caching server as the primary DNS server for stations on the network and have it forward requests for the AD domain to the domain controller.My understanding is that I just need a forward zone for that domain pointing to the domain controller. However it does not seem to be working.So that leaves me to think that my caching server is not forwarding properly.
For example, this AD is going to have a naming convention of hostname.mydomain.local.If I do an nslookup and specify the domain controller's IP address as the server, I can query addresses that exist in DNS on that server, such as dc1.mydomain.local.However, queries to my caching server times out (I get a response from the caching server if I query mydomain.local but none of the objects in that domain) Here is my named.conf file:
options {
directory "/var/named";
listen-on { 192.168.0.14; 127.0.0.1; };
[code]....
On two Centos5 servers, yum gives a segmentation fault error when trying 'yum update' or 'yum check-update' after running 'yum clean' :
[Code]....
The error is the same for the other computer except while attempting to update the rpmforge repository. Nothing has really changed on the servers in some time and 'yum update' worked fine on each yesterday and I have no idea why they would both suddenly fail!
Is it possible to update multiple VPS servers via YUM from inside the hardware node?
View 3 Replies View RelatedFor some reason, when I do a yum check-update I get a list of no changed packages to install. If I follow this immediately with a yum update then it tries to install drbd83. I've tried a yum clean all and repeated the commands and get the same thing. This happens on both the machines that are set up to use DRBD. Just seems weird and I don't understand. Anyone got an explanation?
[root@here]# yum check-update
Loaded plugins: changelog, downloadonly, fastestmirror, priorities, protectbase,
: security
Loading mirror speeds from cached hostfile
* epel: www.mirrorservice.org
* base: mirror.sov.uk.goscomb.net
[Code]...
I have a error when i want to update my system via YUMI execute the next command.sh@ yum -y updateYou could try using --skip-broken to work around the problemYou could try running:package-cleanup --problems package-cleanup --dupes rpm -Va --nofiles --nodigestThe program package-cleanup is found in the yum-utils package.
View 5 Replies View RelatedI ise debian lenny on both server and nodes. Nodes are in sence of drbl drbl project.
So, my sendmail on server works well but on nodes in syslog i see:
Code:
Configuration of sendmail on server and nodes is same and it is:
Code:
How to set the anchor node in NS2? How to define the channel propagation model as Log Normal Shadowing instead of two ray ground reflection model in NS2?
View 2 Replies View Related