CobblerTest
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Revision as of 21:33, 10 February 2010
Contents |
Cobbler Howto
Cobbler install on Dell 1950 Servers
This setup consists of four Dell PowerEdge 1950 servers, connected to each other in a cluster form. The intended purpose of this excercise is to find a way to provision compute nodes, without hassle. This should be ideal for data centers (both HPCC and non-HPCC).
Help from:-
http://www.openskill.info/blog.php?ID=16 http://magazine.redhat.com/2007/08/10/cobbler-how-to-set-up-a-network-boot-server-in-10-minutes/ http://www.enterprisenetworkingplanet.com/netsysm/article.php/3773596 http://www.kanarip.com/courses/Deploying_Linux_Using_Cobbler/
The system has Centos 5.4 x86_64 installed as base OS. You might want to update it before continuing.
yum -y update
After this you should make sure that you have the following installed, from your distribution media / repository.
- httpd
- tftp-server
- xinetd
- reposync (yum-utils provides reposync)
yum -y install httpd yum-utils tftp-server xinetd dhcp
Make sure you are not running kernel-xen on your base OS. (Although it does not matter, but I just want to keep things simple). My scenario requires me not to run kernel-xen. (We are not using virtualization features. These are pure compute nodes.)
Using the link: https://fedorahosted.org/cobbler/wiki/DownloadInstructions
Setup Cobbler Repositories:- (Needs internet connection).
[root@headnode ~]# vi /etc/yum.repos.d/CentOS-Base.repo . . . . . . [cobbler-stable] name=Cobbler-Stable baseurl=http://download.fedora.redhat.com/pub/epel/5/x86_64 [cobbler-testing] name=Cobbler-Testing baseurl=http://download.fedora.redhat.com/pub/epel/testing/5/x86_64 . . . . . . [root@headnode ~]#
Now, install cobbler:-
[root@headnode ~]# yum -y install cobbler koan cman
I have various CD images in my /data/cdimages location. I expanded the ISO image and copied it in CentOS-5.4-x86_64 .
[root@headnode cdimages]# ls CentOS-5.3-i386.DVD.iso CentOS-5.4-x86_64 CentOS-5.4-x86_64-bin-DVD.iso [root@headnode cdimages]#
Assuming you have entire CD media copied in your /data/cdimages/CentOS-5.4-x86_64 , you are now ready to import the repository.
cobbler import --mirror=/data/cdimages/CentOS-5.4-x86_64 --name=Centos5.4-x86_64
or
cobbler import --path=/data/cdimages/CentOS-5.4-x86_64 --name=Centos5.4-x86_64
During import you should get some screen out put as:
[root@headnode cdimages]# cobbler import --mirror=/data/cdimages/CentOS-5.4-x86_64 --name=Centos5.4-x86_64
. . .
. . .
repodata/primary.sqlite.bz2
2141520 100% 3.07MB/s 0:00:00 (xfer#3468, to-check=2/3478)
repodata/primary.xml.gz
1189512 100% 1.67MB/s 0:00:00 (xfer#3469, to-check=1/3478)
repodata/repomd.xml
2142 100% 3.09kB/s 0:00:00 (xfer#3470, to-check=0/3478)
sent 4333936317 bytes received 76408 bytes 39580024.89 bytes/sec
total size is 4333090152 speedup is 1.00
---------------- (adding distros)
- found content (breed=redhat) at /var/www/cobbler/ks_mirror/Centos5.4-x86_64/images/xen
- creating new distro: Centos5.4-xen-x86_64
- creating new profile: Centos5.4-xen-x86_64
- found content (breed=redhat) at /var/www/cobbler/ks_mirror/Centos5.4-x86_64/images/pxeboot
- creating new distro: Centos5.4-x86_64
- creating new profile: Centos5.4-x86_64
- creating new profile: rescue-Centos5.4-x86_64
---------------- (associating repos)
- traversing distro Centos5.4-xen-x86_64
- found content (breed=redhat) at /var/www/cobbler/ks_mirror/Centos5.4-x86_64/images/xen
- descent into /var/www/cobbler/ks_mirror/Centos5.4-x86_64
- processing repo at : /var/www/cobbler/ks_mirror/Centos5.4-x86_64
- need to process repo/comps: /var/www/cobbler/ks_mirror/Centos5.4-x86_64
- looking for /var/www/cobbler/ks_mirror/Centos5.4-x86_64/repodata/*comps*.xml
- createrepo -c cache --groupfile /var/www/cobbler/ks_mirror/Centos5.4-x86_64/repodata/comps.xml /var/www/cobbler/ks_mirror/Centos5.4-x86_64
3309/3309 - CentOS/sblim-cim-client-javadoc-1-35.el5.x86_64.rpm rpm64.rpm
Saving Primary metadata
Saving file lists metadata
Saving other metadata
- traversing distro Centos5.4-x86_64
- found content (breed=redhat) at /var/www/cobbler/ks_mirror/Centos5.4-x86_64/images/pxeboot
- descent into /var/www/cobbler/ks_mirror/Centos5.4-x86_64
- processing repo at : /var/www/cobbler/ks_mirror/Centos5.4-x86_64
- need to process repo/comps: /var/www/cobbler/ks_mirror/Centos5.4-x86_64
- looking for /var/www/cobbler/ks_mirror/Centos5.4-x86_64/repodata/*comps*.xml
- createrepo -c cache --groupfile /var/www/cobbler/ks_mirror/Centos5.4-x86_64/repodata/comps.xml /var/www/cobbler/ks_mirror/Centos5.4-x86_64
3309/3309 - CentOS/sblim-cim-client-javadoc-1-35.el5.x86_64.rpm rpm64.rpm
Saving Primary metadata
Saving file lists metadata
Saving other metadata
---------------- (associating kickstarts)
- found content (breed=redhat) at /var/www/cobbler/ks_mirror/Centos5.4-x86_64/images/pxeboot
- found content (breed=redhat) at /var/www/cobbler/ks_mirror/Centos5.4-x86_64/images/xen
- found content (breed=redhat) at /var/www/cobbler/ks_mirror/Centos5.4-x86_64/images/pxeboot
[root@headnode cdimages]#
Time for cobbler configurations:-
[root@headnode ~]# vi /etc/cobbler/settings server = 192.168.1.203 nextserver=192.168.1.203 pxe_just_once = 1 . . .
Now you should start the cobblerd service along httpd, dhcpd and tftp server.
chkconfig --level 35 cobblerd on chkconfig --level 35 httpd on chkconfig --level 35 xinetd on chkconfig --level 35 dhcpd on service cobblerd restart service httpd restart service dhcpd restart service xinetd restart
Should enable the tftp service in /etc/xinetd.d/tftp , and change disabled=no .
Now run cobbler check and fix any obvious errors.
cobbler check # important
You may want to disable un-necessary services on this server before moving on:
chkconfig --level 35 NetworkManager off chkconfig --level 35 autofs off chkconfig --level 35 avahi-daemon off chkconfig --level 35 avahi-dnsconfd off chkconfig --level 35 bluetooth off chkconfig --level 35 cups off chkconfig --level 35 dc_client off chkconfig --level 35 dc_server off chkconfig --level 35 dhcrelay off chkconfig --level 35 dnsmasq off chkconfig --level 35 dund off chkconfig --level 35 firstboot off chkconfig --level 35 gpm off chkconfig --level 35 hidd off chkconfig --level 35 ip6tables off chkconfig --level 35 iptables off chkconfig --level 35 irda off chkconfig --level 35 iscsi off chkconfig --level 35 iscsid off chkconfig --level 35 kdump off chkconfig --level 35 libvirtd off chkconfig --level 35 lisa off chkconfig --level 35 lvm2-monitor off chkconfig --level 35 mdmonitor off chkconfig --level 35 mdmpd off chkconfig --level 35 multipathd off chkconfig --level 35 mysqld off chkconfig --level 35 named off chkconfig --level 35 netconsole off chkconfig --level 35 netfs off chkconfig --level 35 netplugd off chkconfig --level 35 nfs off chkconfig --level 35 nfslock off chkconfig --level 35 nscd off chkconfig --level 35 ntpd off chkconfig --level 35 oddjobd off chkconfig --level 35 pand off chkconfig --level 35 pcscd off chkconfig --level 35 psacct off chkconfig --level 35 qemu off chkconfig --level 35 rawdevices off chkconfig --level 35 rdisc off chkconfig --level 35 readahead_later off chkconfig --level 35 restorecond off chkconfig --level 35 rpcgssd off chkconfig --level 35 rpcidmapd off chkconfig --level 35 rpcsvcgssd off chkconfig --level 35 saslauthd off chkconfig --level 35 sendmail off chkconfig --level 35 setroubleshoot off chkconfig --level 35 smartd off chkconfig --level 35 smb off chkconfig --level 35 squid off chkconfig --level 35 tcsd off chkconfig --level 35 tux off chkconfig --level 35 vncserver off chkconfig --level 35 wdaemon off chkconfig --level 35 winbind off chkconfig --level 35 wpa_supplicant off chkconfig --level 35 xend off chkconfig --level 35 xendomains off chkconfig --level 35 ypbind off chkconfig --level 35 yum-updatesd off
End of day 1.
=
[root@headnode ~]# cobbler check The following potential problems were detected:
- 0: service dhcpd is not running
- 1: since iptables may be running, ensure 69, 80, and 25151 are unblocked
- 2: yum-utils need to be at least version 1.1.17 for reposync -l, current version is 1.1.16
- 3: The default password used by the sample templates for newly installed machines (default_password_crypted in /etc/cobbler/settings) is still set to 'cobbler' and should be changed
[root@headnode ~]#
[root@headnode ~]# cobbler list distro Centos5.4-x86_64
profile Centos5.4-x86_64 profile rescue-Centos5.4-x86_64
distro Centos5.4-xen-x86_64
profile Centos5.4-xen-x86_64
[root@headnode ~]#
[root@headnode ~]# cobbler distro list
Centos5.4-x86_64
Centos5.4-xen-x86_64
[root@headnode ~]#
[root@headnode ~]# cobbler profile list
Centos5.4-x86_64
Centos5.4-xen-x86_64
rescue-Centos5.4-x86_64
[root@headnode ~]#
No systems are registered with cobbler at the moment:-
[root@headnode ~]# cobbler system list [root@headnode ~]#
Lets create a profile for compute-nodes:-
[root@headnode ~]# cobbler profile copy --name=Centos5.4-x86_64 --newname=ComputeNodes
[root@headnode ~]# cobbler profile list
Centos5.4-x86_64
Centos5.4-xen-x86_64
ComputeNodes # <------------ Newly added profile!
rescue-Centos5.4-x86_64
[root@headnode ~]#
[root@headnode ~]# cobbler profile report --name=ComputeNodes
profile : ComputeNodes
distro : Centos5.4-x86_64
comment :
created : Tue Feb 2 09:06:50 2010
dhcp tag : default
enable menu : True
kernel options : {}
kickstart : /var/lib/cobbler/kickstarts/default.ks # < ------------ Notice this default Kickstart.
ks metadata : {}
mgmt classes : []
modified : Tue Feb 2 09:06:50 2010
name servers : []
name servers search : []
owners : ['admin']
post kernel options : {}
redhat mgmt key : <<inherit>>
redhat mgmt server : <<inherit>>
repos : []
server : <<inherit>>
template_files : {}
virt bridge : xenbr0
virt cpus : 1
virt file size : 5
virt path :
virt ram : 512
virt type : qemu
[root@headnode ~]#
[root@headnode ~]# cat /var/lib/cobbler/kickstarts/default.ks
- this file intentionally left blank
- admins: edit it as you like, or leave it blank for non-interactive install
[root@headnode ~]# cat /var/lib/cobbler/kickstarts/sample.ks
- platform=x86, AMD64, or Intel EM64T
- System authorization information
auth --useshadow --enablemd5
- System bootloader configuration
bootloader --location=mbr
- Partition clearing information
clearpart --all --initlabel
- Use text mode install
text
- Firewall configuration
firewall --enabled
- Run the Setup Agent on first boot
firstboot --disable
- System keyboard
keyboard us
- System language
lang en_US
- Use network installation
url --url=$tree
- If any cobbler repo definitions were referenced in the kickstart profile, include them here.
$yum_repo_stanza
- Network information
$SNIPPET('network_config')
- Reboot after installation
reboot
- Root password
rootpw --iscrypted $default_password_crypted
- SELinux configuration
selinux --disabled
- Do not configure the X Window System
skipx
- System timezone
timezone America/New_York
- Install OS instead of upgrade
install
- Clear the Master Boot Record
zerombr
- Allow anaconda to partition the system as needed
autopart
%pre $SNIPPET('log_ks_pre') $kickstart_start $SNIPPET('pre_install_network_config')
- Enable installation monitoring
$SNIPPET('pre_anamon')
%packages $SNIPPET('func_install_if_enabled')
%post $SNIPPET('log_ks_post')
- Start yum configuration
$yum_config_stanza
- End yum configuration
$SNIPPET('post_install_kernel_options') $SNIPPET('post_install_network_config') $SNIPPET('func_register_if_enabled') $SNIPPET('download_config_files') $SNIPPET('koan_environment') $SNIPPET('redhat_register') $SNIPPET('cobbler_register')
- Enable post-install boot notification
$SNIPPET('post_anamon')
- Start final steps
$kickstart_done
- End final steps
[root@headnode ~]#
[root@headnode ~]# cd /var/lib/cobbler/kickstarts/
[root@headnode kickstarts]# cp sample.ks Compute.ks
[root@headnode kickstarts]# vi Compute.ks
- platform=x86, AMD64, or Intel EM64T
- System authorization information
auth --useshadow --enablemd5
- System bootloader configuration
bootloader --location=mbr
- Partition clearing information
clearpart --all --initlabel
- Use text mode install
text
- Firewall configuration
firewall --disabled
- Run the Setup Agent on first boot
firstboot --disable
- System keyboard
keyboard us
- System language
lang en_US
- Use network installation
url --url=$tree
- If any cobbler repo definitions were referenced in the kickstart profile, include them here.
$yum_repo_stanza
- Network information
$SNIPPET('network_config')
- Reboot after installation
reboot
- Root password
rootpw --iscrypted $default_password_crypted
- SELinux configuration
selinux --disabled
- Do not configure the X Window System
skipx
- System timezone
timezone Asia/Riyadh
- Install OS instead of upgrade
install
- Clear the Master Boot Record
zerombr
- Allow anaconda to partition the system as needed
- autopart
part /boot --size 512 part swap --size 1024 part / --size 4096
%pre
$SNIPPET('log_ks_pre')
$kickstart_start
$SNIPPET('pre_install_network_config')
- Enable installation monitoring
$SNIPPET('pre_anamon')
%packages @core $SNIPPET('func_install_if_enabled')
%post $SNIPPET('log_ks_post')
- Start yum configuration
$yum_config_stanza
- End yum configuration
$SNIPPET('post_install_kernel_options') $SNIPPET('post_install_network_config') $SNIPPET('func_register_if_enabled') $SNIPPET('download_config_files') $SNIPPET('koan_environment') $SNIPPET('redhat_register') $SNIPPET('cobbler_register')
- Enable post-install boot notification
$SNIPPET('post_anamon')
- Start final steps
$kickstart_done
- End final steps
[root@headnode kickstarts]#
[root@headnode kickstarts]# cobbler profile edit --name=ComputeNodes --kickstart=/var/lib/cobbler/kickstarts/Compute.ks
[root@headnode kickstarts]#
Verify the change:-
[root@headnode kickstarts]# cobbler profile report --name=ComputeNodes | grep kickstart kickstart : /var/lib/cobbler/kickstarts/Compute.ks [root@headnode kickstarts]#
Now define/ add compute nodes:-
[root@headnode ~]# cobbler system add --name=compute1 --profile=ComputeNodes --mac=00:1D:09:6A:27:91
[root@headnode ~]# cobbler system add --name=compute2 --profile=ComputeNodes --mac=00:1D:09:6B:06:81 [root@headnode ~]#
Note ----------
In case you try to make a duplicate entry:-
[root@headnode ~]# cobbler system add --name=compute1 --profile=ComputeNodes --mac=00:1D:09:6B:06:7F An object already exists with that name. Try 'edit'?
[root@headnode ~]# cobbler system list compute1 compute2 [root@headnode ~]#
You can check report of the nodes now. I am only interested in few parameters.
[root@headnode ~]# cobbler system report | egrep "system|profile|power type|interface|mac" system : compute1 profile : ComputeNodes power type : ipmitool interface : eth0
mac address : 00:1D:09:6A:27:8F
system : compute2 profile : ComputeNodes power type : ipmitool interface : eth0
mac address : 00:1D:09:6B:06:7F
[root@headnode ~]#
I need to change the interface from eth0 to eth1.
[root@headnode ~]# cobbler system add --name=compute1 --profile=ComputeNodes --mac=00:1D:09:6A:27:91 --hostname=compute1.example.com --interface=eth1 --ip=192.168.1.1 --subnet=255.255.255.0 --kopts=noipv6 --power-address=192.168.0.1 --power-user=root --power-pass=power
[root@headnode ~]# cobbler system add --name=compute2 --profile=ComputeNodes --mac=00:1D:09:6B:06:81 --hostname=compute2.example.com --interface=eth1 --ip=192.168.1.2 --subnet=255.255.255.0 --kopts=noipv6 --power-address=192.168.0.2 --power-user=root --power-pass=power [root@headnode ~]#
[root@headnode ~]# cobbler system report | egrep "system|profile|power type|interface|mac"
system : compute1
profile : ComputeNodes
power type : ipmitool
interface : eth0
mac address : 00:1D:09:6A:27:8F
system : compute2 profile : ComputeNodes power type : ipmitool interface : eth0
mac address : 00:1D:09:6B:06:7F
[root@headnode ~]#
[root@headnode ~]# cat /tftpboot/pxelinux.cfg/01-00-1d-09-6a-27-8f
default linux
prompt 0
timeout 1
label linux
kernel /images/Centos5.4-x86_64/vmlinuz
ipappend 2
append initrd=/images/Centos5.4-x86_64/initrd.img ksdevice=bootif lang= kssendmac text ks=http://192.168.1.200/cblr/svc/op/ks/system/compute1
[root@headnode ~]#
service cobblerd restart
[root@headnode ~]# service dhcpd restart Starting dhcpd: [FAILED] [root@headnode ~]#
Wasted all my day. This is the fix:-
[root@headnode ~]# cobbler sync Shutting down dhcpd: [ OK ] Starting dhcpd: [ OK ]
[root@headnode ~]# cat /etc/dhcpd.conf
- ******************************************************************
- Cobbler managed dhcpd.conf file
- generated from cobbler dhcp.conf template (Tue Feb 2 11:47:35 2010)
- Do NOT make changes to /etc/dhcpd.conf. Instead, make your changes
- in /etc/cobbler/dhcp.template, as /etc/dhcpd.conf will be
- overwritten.
- ******************************************************************
ddns-update-style interim;
allow booting; allow bootp;
ignore client-updates; set vendorclass = option vendor-class-identifier;
subnet 192.168.1.0 netmask 255.255.255.0 {
option routers 192.168.1.200;
option domain-name-servers 192.168.1.200;
option subnet-mask 255.255.255.0;
range dynamic-bootp 192.168.1.1 192.168.1.10;
filename "/pxelinux.0";
default-lease-time 21600;
max-lease-time 43200;
next-server 192.168.1.200;
}
- group for Cobbler DHCP tag: default
group {
host generic1 {
hardware ethernet 00:1D:09:6B:06:91;
filename "/pxelinux.0";
next-server 192.168.1.200;
}
}
[root@headnode ~]#
[root@headnode ~]# ls /tftpboot/pxelinux.cfg/ -l
total 12
-rw-r--r-- 1 root root 272 Feb 8 13:18 01-00-1d-09-6a-27-91
-rw-r--r-- 1 root root 272 Feb 8 13:18 01-00-1d-09-6b-06-81
-rw-r--r-- 1 root root 1091 Feb 8 13:18 default
[root@headnode ~]#
A bit of power issue.
ipmitool, which is supported by CentOS, could not be found on the system. Instead, ipmipower was there, from freeipmi-rpm.
/etc/cobbler/settings mention something about the power scripts/templates. These are in /etc/cobbler/power directory.
[root@headnode ~]# cd /etc/cobbler/power/
[root@headnode power]# ls
power_apc_snmp.template power_ether_wake.template power_ipmitool.template power_wti.template
power_bladecenter.template power_ilo.template power_lpar.template
power_bullpap.template power_integrity.template power_rsa.template
power_drac.template power_ipmilan.template power_virsh.template
[root@headnode power]# cat power_ipmitool.template
/usr/bin/ipmitool -H $power_address -U $power_user -P $power_pass power $power_mode
[root@headnode power]#
The syntax of ipmitool and ipmipower are a bit different so this is not do-able. (Probably).
[root@headnode ~]# yum -y install OpenIPMI-tools
[root@headnode ~]# rpm -ql OpenIPMI-tools
/etc/rc.d/init.d/ipmievd
/etc/sysconfig/ipmievd
/usr/bin/ipmitool
Ahaa!!!
Time to reboot these nodes and see if they are installed:
[root@headnode power]# cobbler report --what=systems | egrep -i "hostname|netboot" hostname : compute1.example.com netboot enabled? : True hostname : compute2.example.com netboot enabled? : True [root@headnode power]#
[root@headnode power]# cobbler system reboot --name=compute1
cobbler power configuration is:
type : ipmitool
address: 192.168.0.1
user : root
id :
- /usr/bin/ipmitool -H 192.168.0.1 -U root -P power power off Chassis Power Control: Down/Off cobbler power configuration is:
type : ipmitool
address: 192.168.0.1
user : root
id :
- /usr/bin/ipmitool -H 192.168.0.1 -U root -P power power on Chassis Power Control: Up/On [root@headnode power]#
After reboot of node1, the installation started. However it got stuck in an install loop. This happened, because PXE is the first boot device in the nodes.
[root@headnode power]# cobbler report --what=systems | egrep -i "hostname|netboot" hostname : compute1.example.com netboot enabled? : True hostname : compute2.example.com netboot enabled? : True [root@headnode power]#
For such situations, there is a flag in /etc/cobbler/settings, which turns off the netboot flag, when the installation is done. It is "pxe_just_once" and is set to 0 by default. It needs to be turned to 1 in this situation.
pxe_just_once: 1
This worked!
===============================
Now the few other issues.
1) Static IP for eth1, and see if it still installs from DHCP server. 2) disable eth0 so it does not wait for dhcp when the node reboots in to local os /disk. 3) How to check if the nodes are installed? 4) Console redirection during TFTP and installation.
1) Static IP:-
[root@headnode ~]# cobbler system edit --name compute1 --interface=eth1 --static=1
This is the solution for setting static IP, post-reboot. The installation got done through PXE (good).
Here is what cobbler did:-
[root@compute1 ~]# cat /etc/sysconfig/network-scripts/ifcfg-eth1 DEVICE=eth1 HWADDR=00:1D:09:6A:27:91 ONBOOT=yes BOOTPROTO=static IPADDR=192.168.1.1 NETMASK=255.255.255.0 [root@compute1 ~]#
2) disable eth0
[root@headnode ~]# cobbler system edit --name=compute1 --delete-interface=eth0
(I don't know, if it will work)
This did not work. Lets set eth0 as static. so it won't waste time on waiting for DHCP and failing.
[root@headnode ~]# cobbler system edit --name compute1 --interface=eth0 --static=1
[root@headnode ~]# cobbler report system --name=compute1 system : compute1 profile : ComputeNodes comment : . . . interface : eth0
mac address : is static? : True ip address : subnet : static routes : [] dhcp tag :
interface : eth1
mac address : 00:1D:09:6A:27:91 is static? : True ip address : 192.168.1.1 subnet : 255.255.255.0 static routes : [] dhcp tag :
[root@headnode ~]#
This time it worked. I have lovely results!
[root@compute1 ~]# ifconfig eth0 Link encap:Ethernet HWaddr 00:1D:09:6A:27:8F
inet6 addr: fe80::21d:9ff:fe6a:278f/64 Scope:Link
eth1 Link encap:Ethernet HWaddr 00:1D:09:6A:27:91
inet addr:192.168.1.1 Bcast:192.168.1.255 Mask:255.255.255.0
inet6 addr: fe80::21d:9ff:fe6a:2791/64 Scope:Link
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
[root@compute1 ~]# cat /etc/sysconfig/network-scripts/ifcfg-eth0 DEVICE=eth0 HWADDR=00:1D:09:6A:27:8F ONBOOT=yes BOOTPROTO=none
[root@compute1 ~]# cat /etc/sysconfig/network-scripts/ifcfg-eth1 DEVICE=eth1 HWADDR=00:1D:09:6A:27:91 ONBOOT=yes BOOTPROTO=static IPADDR=192.168.1.1 NETMASK=255.255.255.0 [root@compute1 ~]#
Notice that Cobbler set BOOTPROTO=none for eth0.
However the node was not able to ping any other node on IPMI interface. hmmmmmmm.
[root@compute1 ~]# ping 192.168.0.200 connect: Network is unreachable
[root@compute1 ~]# ping 192.168.0.201 connect: Network is unreachable [root@compute1 ~]#
Trying this:- [root@headnode ~]# cobbler system edit --name=compute1 --delete-interface=eth0
This did not help prevent eth0 asking for dhcp / IP.
Day n+1 (3?)
How to pass console redirection options to TFTP file:-
[root@headnode ~]# cobbler distro list Centos5.4-x86_64 Centos5.4-xen-x86_64 [root@headnode ~]#
Centos5.4-x86_64 is the distro we are using for provisioning the nodes.
[root@headnode ~]# cobbler distro report --name=Centos5.4-x86_64 distro : Centos5.4-x86_64 architecture : x86_64 breed : redhat created : Mon Feb 1 15:06:46 2010 comment : rhel5.4 initrd : /var/www/cobbler/ks_mirror/Centos5.4-x86_64/images/pxeboot/initrd.img kernel : /var/www/cobbler/ks_mirror/Centos5.4-x86_64/images/pxeboot/vmlinuz kernel options : {} ks metadata : {'tree': 'http://@@http_server@@/cblr/links/Centos5.4-x86_64'} tree build time : Thu Oct 1 19:57:55 2009 modified : Mon Feb 1 15:10:12 2010 mgmt classes : [] os version : rhel5 owners : ['admin'] post kernel options : {} redhat mgmt key : <<inherit>> redhat mgmt server : <<inherit>> template files : {}
[root@headnode ~]#
[root@headnode ~]# cobbler distro edit --name=Centos5.4-x86_64 --kopts="console=ttyS1,115200"
[root@headnode ~]# cobbler distro report --name=Centos5.4-x86_64 distro : Centos5.4-x86_64 architecture : x86_64 breed : redhat created : Mon Feb 1 15:06:46 2010 comment : rhel5.4 initrd : /var/www/cobbler/ks_mirror/Centos5.4-x86_64/images/pxeboot/initrd.img kernel : /var/www/cobbler/ks_mirror/Centos5.4-x86_64/images/pxeboot/vmlinuz kernel options : {'console': 'ttyS1,115200'} ks metadata : {'tree': 'http://@@http_server@@/cblr/links/Centos5.4-x86_64'} tree build time : Thu Oct 1 19:57:55 2009 modified : Tue Feb 9 08:24:51 2010 mgmt classes : [] os version : rhel5 owners : ['admin'] post kernel options : {} redhat mgmt key : <<inherit>> redhat mgmt server : <<inherit>> template files : {}
[root@headnode ~]#
Now check the profiles:-
[root@headnode ~]# cobbler profile list Centos5.4-x86_64 Centos5.4-xen-x86_64 ComputeNodes rescue-Centos5.4-x86_64 [root@headnode ~]#
We are interested in profile named "ComputeNodes":-
[root@headnode ~]# cobbler profile report --name=ComputeNodes profile : ComputeNodes distro : Centos5.4-x86_64 comment : created : Tue Feb 2 09:06:50 2010 dhcp tag : default enable menu : True kernel options : {} kickstart : /var/lib/cobbler/kickstarts/Compute.ks ks metadata : {} mgmt classes : [] modified : Tue Feb 2 09:16:28 2010 name servers : [] name servers search : [] owners : ['admin'] post kernel options : {} redhat mgmt key : <<inherit>> redhat mgmt server : <<inherit>> repos : [] server : <<inherit>> template_files : {} virt bridge : xenbr0 virt cpus : 1 virt file size : 5 virt path : virt ram : 512 virt type : qemu
[root@headnode ~]#
[root@headnode ~]# cobbler profile edit --name=ComputeNodes --ksmeta="console=ttyS1,115200"
[root@headnode ~]# cobbler sync
Starting dhcpd: [ OK ]
[root@headnode ~]#
[root@headnode ~]# cobbler system edit --name compute1 --netboot-enabled=1
[root@headnode ~]# cobbler sync Shutting down dhcpd: [ OK ] Starting dhcpd: [ OK ]
[root@headnode ~]# cat /tftpboot/pxelinux.cfg/01-00-1d-09-6a-27-91 default linux prompt 0 timeout 1 label linux
kernel /images/Centos5.4-x86_64/vmlinuz
ipappend 2
append initrd=/images/Centos5.4-x86_64/initrd.img ksdevice=bootif lang= console=ttyS1,115200 text noipv6 kssendmac ks=http://192.168.1.200/cblr/svc/op/ks/system/compute1
[root@headnode ~]#
ipmiconsole
[root@headnode ~]# ipmiconsole --hostname=192.168.0.1 --username=root --password=ipmisecret ipmiconsole_submit_block: internal system error
[root@headnode ~]# ipmiconsole --hostname=192.168.0.1 --username=root --password=redhat ipmiconsole_submit_block: internal system error
[root@headnode ~]# ifconfig eth0 Link encap:Ethernet HWaddr 00:1D:09:69:F3:BB
inet6 addr: fe80::21d:9ff:fe69:f3bb/64 Scope:Link
eth1 Link encap:Ethernet HWaddr 00:1D:09:69:F3:BD
inet addr:192.168.1.200 Bcast:192.168.1.255 Mask:255.255.255.0
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
[root@headnode ~]# ifconfig eth0 192.168.0.201 netmask 255.255.255.0 up
[root@headnode ~]# ifconfig eth0 Link encap:Ethernet HWaddr 00:1D:09:69:F3:BB
inet addr:192.168.0.201 Bcast:192.168.0.255 Mask:255.255.255.0
eth1 Link encap:Ethernet HWaddr 00:1D:09:69:F3:BD
inet addr:192.168.1.200 Bcast:192.168.1.255 Mask:255.255.255.0
inet6 addr: fe80::21d:9ff:fe69:f3bd/64 Scope:Link
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
[root@headnode ~]# ipmiconsole --hostname=192.168.0.1 --username=root --password=ipmisecret [SOL established]
Also if the node is off, cycle may not work:-
[root@headnode ~]# ipmipower --hostname=192.168.0.1 --username=root --password=ipmisecret --cycle 192.168.0.1: operation invalid
[root@headnode ~]# ipmipower --hostname=192.168.0.1 --username=root --password=ipmisecret --off 192.168.0.1: ok
[root@headnode ~]# ipmipower --hostname=192.168.0.1 --username=root --password=ipmisecret --on 192.168.0.1: ok [root@headnode ~]#
When using console=ttyS1,57600n8r , we get a node install time slowed down 5 times. Without it, the node install time was 1 minute. With it the node install time reached 5+ minutes.
Using 115200 as console bnaud rate shows too much garbage on ipmiconsole as soon as the TFTP boot image is read. Before that, the BIOS display part is ok.
Why is that?
Why two console= options in Scali and CVOS?
Gilbert suggests to use console ttyS0 as well, along ttyS1. This is because ttyS1 is redirected to SOL. Whereas ttyS0 is not redirected, thus the messages should appear on the normal VGA console as well.
This did not work. I lost console on both the IPMI console and the node itself.
How to get rid of garbage on console when using 115200 baud rate?
==============================================
Day 2:
Cobbler howto-2
=
[root@headnode ~]# cobbler check The following potential problems were detected:
- 0: service dhcpd is not running
- 1: since iptables may be running, ensure 69, 80, and 25151 are unblocked
- 2: yum-utils need to be at least version 1.1.17 for reposync -l, current version is 1.1.16
- 3: The default password used by the sample templates for newly installed machines (default_password_crypted in /etc/cobbler/settings) is still set to 'cobbler' and should be changed
[root@headnode ~]#
[root@headnode ~]# cobbler list distro Centos5.4-x86_64
profile Centos5.4-x86_64 profile rescue-Centos5.4-x86_64
distro Centos5.4-xen-x86_64
profile Centos5.4-xen-x86_64
[root@headnode ~]#
[root@headnode ~]# cobbler distro list
Centos5.4-x86_64
Centos5.4-xen-x86_64
[root@headnode ~]#
[root@headnode ~]# cobbler profile list
Centos5.4-x86_64
Centos5.4-xen-x86_64
rescue-Centos5.4-x86_64
[root@headnode ~]#
No systems are registered with cobbler at the moment:-
[root@headnode ~]# cobbler system list [root@headnode ~]#
Lets create a profile for compute-nodes:-
[root@headnode ~]# cobbler profile copy --name=Centos5.4-x86_64 --newname=ComputeNodes
[root@headnode ~]# cobbler profile list
Centos5.4-x86_64
Centos5.4-xen-x86_64
ComputeNodes # <------------ Newly added profile!
rescue-Centos5.4-x86_64
[root@headnode ~]#
[root@headnode ~]# cobbler profile report --name=ComputeNodes
profile : ComputeNodes
distro : Centos5.4-x86_64
comment :
created : Tue Feb 2 09:06:50 2010
dhcp tag : default
enable menu : True
kernel options : {}
kickstart : /var/lib/cobbler/kickstarts/default.ks # < ------------ Notice this default Kickstart.
ks metadata : {}
mgmt classes : []
modified : Tue Feb 2 09:06:50 2010
name servers : []
name servers search : []
owners : ['admin']
post kernel options : {}
redhat mgmt key : <<inherit>>
redhat mgmt server : <<inherit>>
repos : []
server : <<inherit>>
template_files : {}
virt bridge : xenbr0
virt cpus : 1
virt file size : 5
virt path :
virt ram : 512
virt type : qemu
[root@headnode ~]#
[root@headnode ~]# cat /var/lib/cobbler/kickstarts/default.ks
- this file intentionally left blank
- admins: edit it as you like, or leave it blank for non-interactive install
[root@headnode ~]# cat /var/lib/cobbler/kickstarts/sample.ks
- platform=x86, AMD64, or Intel EM64T
- System authorization information
auth --useshadow --enablemd5
- System bootloader configuration
bootloader --location=mbr
- Partition clearing information
clearpart --all --initlabel
- Use text mode install
text
- Firewall configuration
firewall --enabled
- Run the Setup Agent on first boot
firstboot --disable
- System keyboard
keyboard us
- System language
lang en_US
- Use network installation
url --url=$tree
- If any cobbler repo definitions were referenced in the kickstart profile, include them here.
$yum_repo_stanza
- Network information
$SNIPPET('network_config')
- Reboot after installation
reboot
- Root password
rootpw --iscrypted $default_password_crypted
- SELinux configuration
selinux --disabled
- Do not configure the X Window System
skipx
- System timezone
timezone America/New_York
- Install OS instead of upgrade
install
- Clear the Master Boot Record
zerombr
- Allow anaconda to partition the system as needed
autopart
%pre
$SNIPPET('log_ks_pre')
$kickstart_start
$SNIPPET('pre_install_network_config')
- Enable installation monitoring
$SNIPPET('pre_anamon')
%packages $SNIPPET('func_install_if_enabled')
%post $SNIPPET('log_ks_post')
- Start yum configuration
$yum_config_stanza
- End yum configuration
$SNIPPET('post_install_kernel_options') $SNIPPET('post_install_network_config') $SNIPPET('func_register_if_enabled') $SNIPPET('download_config_files') $SNIPPET('koan_environment') $SNIPPET('redhat_register') $SNIPPET('cobbler_register')
- Enable post-install boot notification
$SNIPPET('post_anamon')
- Start final steps
$kickstart_done
- End final steps
[root@headnode ~]#
[root@headnode ~]# cd /var/lib/cobbler/kickstarts/
[root@headnode kickstarts]# cp sample.ks Compute.ks
[root@headnode kickstarts]# vi Compute.ks
- platform=x86, AMD64, or Intel EM64T
- System authorization information
auth --useshadow --enablemd5
- System bootloader configuration
bootloader --location=mbr
- Partition clearing information
clearpart --all --initlabel
- Use text mode install
text
- Firewall configuration
firewall --disabled
- Run the Setup Agent on first boot
firstboot --disable
- System keyboard
keyboard us
- System language
lang en_US
- Use network installation
url --url=$tree
- If any cobbler repo definitions were referenced in the kickstart profile, include them here.
$yum_repo_stanza
- Network information
$SNIPPET('network_config')
- Reboot after installation
reboot
- Root password
rootpw --iscrypted $default_password_crypted
- SELinux configuration
selinux --disabled
- Do not configure the X Window System
skipx
- System timezone
timezone Asia/Riyadh
- Install OS instead of upgrade
install
- Clear the Master Boot Record
zerombr
- Allow anaconda to partition the system as needed
autopart
%pre
$SNIPPET('log_ks_pre')
$kickstart_start
$SNIPPET('pre_install_network_config')
- Enable installation monitoring
$SNIPPET('pre_anamon')
%packages @base $SNIPPET('func_install_if_enabled')
%post $SNIPPET('log_ks_post')
- Start yum configuration
$yum_config_stanza
- End yum configuration
$SNIPPET('post_install_kernel_options') $SNIPPET('post_install_network_config') $SNIPPET('func_register_if_enabled') $SNIPPET('download_config_files') $SNIPPET('koan_environment') $SNIPPET('redhat_register') $SNIPPET('cobbler_register')
- Enable post-install boot notification
$SNIPPET('post_anamon')
- Start final steps
$kickstart_done
- End final steps
[root@headnode kickstarts]#
[root@headnode kickstarts]# cobbler profile edit --name=ComputeNodes --kickstart=/var/lib/cobbler/kickstarts/Compute.ks
[root@headnode kickstarts]#
Verify the change:-
[root@headnode kickstarts]# cobbler profile report --name=ComputeNodes | grep kickstart kickstart : /var/lib/cobbler/kickstarts/Compute.ks [root@headnode kickstarts]#
Now define/ add compute nodes:-
[root@headnode ~]# cobbler system add --name=compute1 --profile=ComputeNodes --mac=00:1D:09:6A:27:8F
[root@headnode ~]# cobbler system add --name=compute2 --profile=ComputeNodes --mac=00:1D:09:6B:06:7F [root@headnode ~]#
Note ----------
In case you try to make a duplicate entry:-
[root@headnode ~]# cobbler system add --name=compute1 --profile=ComputeNodes --mac=00:1D:09:6B:06:7F An object already exists with that name. Try 'edit'?
[root@headnode ~]# cobbler system list compute1 compute2 [root@headnode ~]#
You can check report of the nodes now. I am only interested in few parameters.
[root@headnode ~]# cobbler system report | egrep "system|profile|power type|interface|mac" system : compute1 profile : ComputeNodes power type : ipmitool interface : eth0
mac address : 00:1D:09:6A:27:8F
system : compute2 profile : ComputeNodes power type : ipmitool interface : eth0
mac address : 00:1D:09:6B:06:7F
[root@headnode ~]#
I need to change the interface from eth0 to eth1.
[root@headnode ~]# cobbler system edit --name=compute1 --interface=eth1 --power-type=ipmitool --power-user=root --power-pass=calvin
[root@headnode ~]# cobbler system edit --name=compute2 --interface=eth1 --power-type=ipmitool --power-user=root --power-pass=calvin [root@headnode ~]#
[root@headnode ~]# cobbler system report | egrep "system|profile|power type|interface|mac"
system : compute1
profile : ComputeNodes
power type : ipmitool
interface : eth0
mac address : 00:1D:09:6A:27:8F
system : compute2 profile : ComputeNodes power type : ipmitool interface : eth0
mac address : 00:1D:09:6B:06:7F
[root@headnode ~]#
[root@headnode ~]# cat /tftpboot/pxelinux.cfg/01-00-1d-09-6a-27-8f
default linux
prompt 0
timeout 1
label linux
kernel /images/Centos5.4-x86_64/vmlinuz
ipappend 2
append initrd=/images/Centos5.4-x86_64/initrd.img ksdevice=bootif lang= kssendmac text ks=http://192.168.1.200/cblr/svc/op/ks/system/compute1
[root@headnode ~]#
service cobblerd restart
[root@headnode ~]# service dhcpd restart Starting dhcpd: [FAILED] [root@headnode ~]#
Wasted all my day. This is the fix:-
[root@headnode ~]# cobbler sync Shutting down dhcpd: [ OK ] Starting dhcpd: [ OK ]
[root@headnode ~]# cat /etc/dhcpd.conf
- ******************************************************************
- Cobbler managed dhcpd.conf file
- generated from cobbler dhcp.conf template (Tue Feb 2 11:47:35 2010)
- Do NOT make changes to /etc/dhcpd.conf. Instead, make your changes
- in /etc/cobbler/dhcp.template, as /etc/dhcpd.conf will be
- overwritten.
- ******************************************************************
ddns-update-style interim;
allow booting; allow bootp;
ignore client-updates; set vendorclass = option vendor-class-identifier;
subnet 192.168.1.0 netmask 255.255.255.0 {
option routers 192.168.1.200;
option domain-name-servers 192.168.1.200;
option subnet-mask 255.255.255.0;
range dynamic-bootp 192.168.1.1 192.168.1.10;
filename "/pxelinux.0";
default-lease-time 21600;
max-lease-time 43200;
next-server 192.168.1.200;
}
- group for Cobbler DHCP tag: default
group {
host generic1 {
hardware ethernet 00:1D:09:6B:06:91;
filename "/pxelinux.0";
next-server 192.168.1.200;
}
}
[root@headnode ~]#
