Install Ansible : Great tool for cluster mgmt http://docs.ansible.com/intro_installation.html note:make sure that all of your hosts are ssh via key Install on Centos: #sudo yum install ansible go to the /etc/ansible/hosts and edit it like the following example: # This is the default ansible 'hosts' file. # # It should live in /etc/ansible/hosts # # - Comments begin with the '#' character # - Blank lines are ignored # - Groups of hosts are delimited by [header] elements # - You can enter hostnames or ip addresses # - A hostname/ip can be a member of multiple groups # Ex 1: Ungrouped hosts, specify before any group headers. #green.example.com 10.20.0.2 [servers] 10.20.0.3 10.20.0.4 10.20.0.5 10.20.0.6 10.20.0.7 10.20.0.8 [computes] 10.20.0.4 10.20.0.5 10.20.0.6 10.20.0.7 10.20.0.8 [mesos] 111.111.111.15 111.111.111.16 Now to run a command: example #1 run cmd on all servers #ansible all -a "date" 10.20.0.4 | success | rc=0 >> Thu Apr 16 10:18:27 UTC 2015 10.20.0.6 | success | rc=0 >> Thu Apr 16 10:18:27 UTC 2015 10.20.0.7 | success | rc=0 >> Thu Apr 16 10:18:27 UTC 2015 10.20.0.5 | success | rc=0 >> Thu Apr 16 10:18:27 UTC 2015 10.20.0.8 | success | rc=0 >> Thu Apr 16 10:18:28 UTC 2015 10.20.0.2 | success | rc=0 >> Thu Apr 16 10:18:28 UTC 2015 111.111.111.16 | success | rc=0 >> Thu Apr 16 10:18:28 UTC 2015 111.111.111.15 | success | rc=0 >> Thu Apr 16 10:18:28 UTC 2015 10.20.0.3 | success | rc=0 >> Thu Apr 16 10:18:28 UTC 2015 example #2 run hostname cmd on all servers # ansible computes -a "hostname" 10.20.0.8 | success | rc=0 >> node-6.domain.tld 10.20.0.4 | success | rc=0 >> node-2.domain.tld 10.20.0.6 | success | rc=0 >> node-4.domain.tld 10.20.0.7 | success | rc=0 >> node-5.domain.tld 10.20.0.5 | success | rc=0 >> node-3.domain.tld
Thursday, April 16, 2015
Sunday, March 15, 2015
example for iptables on centos:
# configuration written by system-config-securitylevel
# Manual customization of this file is not recommended.
#################################################################################
# Filtering table:
#################################################################################
*filter
:INPUT DROP [0:0]
:FORWARD DROP [0:0]
:OUTPUT ACCEPT [0:0]
######################################################
# INPUT - beginning
# -----------------
# allow packets of already established connections:
-A INPUT -m state --state RELATED,ESTABLISHED -j ACCEPT
# INPUT to firewall from loopback - all allowed (lo)
# --------------------------------------------------
-A INPUT -i lo -j ACCEPT
# INPUT to firewall - from NTTNode (eth2)
# --------------------------------------
# allow any traffic from inside:
-A INPUT -i eth2 -j ACCEPT
# INPUT to firewall - from OpenVPN connections (tun0)
# ---------------------------------------------------
# allow any traffic for OpenVPN clients:
-A INPUT -i tun0 -s 192.168.100.0/24 -j ACCEPT
# INPUT to firewall - from KVM VMs connections (virbr0)
# ---------------------------------------------------
# allow any traffic for KVM VMs:
-A INPUT -i virbr0 -s 10.80.90.0/24 -j ACCEPT
# INPUT to firewall - from Internet (eth3)
# ----------------------------------------
# allow pings for connection testing:
-A INPUT -i eth0 -p icmp --icmp-type echo-request -j ACCEPT
#
# allow incoming OpenVPN connections:
-A INPUT -i eth0 -p tcp -m state --state NEW -m tcp --dport 1194 -j ACCEPT
-A INPUT -i eth0 -p udp -m state --state NEW -m udp --dport 1194 -j ACCEPT
#
# allow SSH on port 22000
-A INPUT -i eth0 -p tcp -m tcp --dport 22000 -m state --state NEW -j ACCEPT
######################################################
# FORWARDING - beginning
# ----------------------
# allow packets of already established connections:
-A FORWARD -m state --state RELATED,ESTABLISHED -j ACCEPT
# FORWARDING - from NTTNode to Internet (eth2 --> eth0)
# ----------------------------------------------------
# allow any outgoing traffic:
-A FORWARD -i eth2 -o eth0 -j ACCEPT
# FORWARDING - from NTTNode to OpenVPN clients (eth0 --> tun0)
# -----------------------------------------------------------
# FORWARDING - from Internet to CI VM (eth0 --> virbr0)
# ---------------------------------------------------
-A FORWARD -i eth0 -o virbr0 -j ACCEPT
# FORWARDING - from NTTNode to CI VM (eth2 --> virbr0)
# ---------------------------------------------------
-A FORWARD -i eth2 -o virbr0 -j ACCEPT
# FORWARDING - from OpenVPN to Node12 (tun0 --> eth2)
# ---------------------------------------------------
# allow any traffic for OpenVPN users:
-A FORWARD -i tun0 -o eth2 -s 192.168.100.0/24 -j ACCEPT
# FORWARDING - from CI VM to NTTNode (virbr0 --> eth2)
# ----------------------------------------------------
# allow any traffic for OpenVPN users:
-A FORWARD -i virbr0 -o eth2 -j ACCEPT
# FORWARDING - from CI VM to Internet (virbr0 --> eth0)
# ----------------------------------------------------
# allow any traffic for OpenVPN users:
-A FORWARD -i virbr0 -o eth0 -j ACCEPT
# FORWARDING - from CI VM to OpenVPN client (virbr0 --> tun0)
# ---------------------------------------------------
# allow any traffic for OpenVPN users:
-A FORWARD -i virbr0 -o tun0 -j ACCEPT
# FORWARDING - from OpenVPN client to CI VM (tun0 --> virbr0)
# ---------------------------------------------------
# allow any traffic for OpenVPN users
-A FORWARD -i tun0 -o virbr0 -j ACCEPT
# FORWARDING - from OpenVPN to Internet (tun0 --> eth0)
# -----------------------------------------------------
-A FORWARD -i tun0 -o eth0 -j ACCEPT
# FORWARDING - from kvm to kvm (virbr0 --> virbr0)
# ----------------------------------------------------
-A FORWARD -i virbr0 -o virbr0 -j ACCEPT
# FORWARDING - from Internet to OpenVPN clients (eth0 --> tun0)
# -------------------------------------------------------------
# FORWARDING - from Internet to CI VM (eth0 --> virbr0)
# ----------------------------------------------------
# FORWARDING - from CI VM to Internet (virbr0 --> eth0)
# ----------------------------------------------------
-A FORWARD -i virbr0 -o eth0 -j ACCEPT
# FORWARDING - from NTTNode to OpenVPN clients (eth2 --> tun0)
# ----------------------------------------------------
-A FORWARD -i eth2 -o tun0 -j ACCEPT
# COMMIT filtering rules
COMMIT
#################################################################################
# NAT table:
#################################################################################
*nat
:PREROUTING ACCEPT [0:0]
:POSTROUTING ACCEPT [0:0]
:OUTPUT ACCEPT [0:0]
# enable NAT for any outgoing traffic (eth2-->eth0 or tun0-->eth0)
-A POSTROUTING -o eth0 -j MASQUERADE
# COMMIT NAT rules
COMMIT
Monday, November 3, 2014
How to disable server on OpenStack-nova
[root@os-controller ~(keystone_admin)]# nova service-disable compute-0-3.local nova-compute
+-------------------+--------------+----------+
| Host | Binary | Status |
+-------------------+--------------+----------+
| compute-0-3.local | nova-compute | disabled |
+-------------------+--------------+----------+
[root@os-controller ~(keystone_admin)]# nova-manage service list
Binary Host Zone Status State Updated_At
nova-consoleauth os-controller.local internal enabled :-) 2014-07-21 09:45:47
nova-scheduler os-controller.local internal enabled :-) 2014-07-21 09:45:48
nova-conductor os-controller.local internal enabled :-) 2014-07-21 09:45:48
nova-cert os-controller.local internal enabled :-) 2014-07-21 09:45:51
nova-compute compute-0-3.local nova disabled XXX 2014-07-21 09:42:36
nova-compute compute-0-2.local nova enabled :-) 2014-07-21 09:45:47
nova-compute compute-0-1.local nova enabled :-) 2014-07-21 09:45:48
nova-compute compute-0-0.local nova enabled :-) 2014-07-21 09:45:47
nova-console os-controller.local internal enabled :-) 2014-07-21 09:45:55
[root@os-controller ~(keystone_admin)]#
[root@os-controller ~(keystone_admin)]# nova service-disable compute-0-3.local nova-compute
+-------------------+--------------+----------+
| Host | Binary | Status |
+-------------------+--------------+----------+
| compute-0-3.local | nova-compute | disabled |
+-------------------+--------------+----------+
[root@os-controller ~(keystone_admin)]# nova-manage service list
Binary Host Zone Status State Updated_At
nova-consoleauth os-controller.local internal enabled :-) 2014-07-21 09:45:47
nova-scheduler os-controller.local internal enabled :-) 2014-07-21 09:45:48
nova-conductor os-controller.local internal enabled :-) 2014-07-21 09:45:48
nova-cert os-controller.local internal enabled :-) 2014-07-21 09:45:51
nova-compute compute-0-3.local nova disabled XXX 2014-07-21 09:42:36
nova-compute compute-0-2.local nova enabled :-) 2014-07-21 09:45:47
nova-compute compute-0-1.local nova enabled :-) 2014-07-21 09:45:48
nova-compute compute-0-0.local nova enabled :-) 2014-07-21 09:45:47
nova-console os-controller.local internal enabled :-) 2014-07-21 09:45:55
[root@os-controller ~(keystone_admin)]#
How to re-size qcow2 image using guest-fish?
#######################################################################################################################################################################################################################
resize Image using virt-resize i.e. guestfish
#######################################################################################################################################################################################################################
1.copy the original image twice not to harm the original
# cp tinyCentos.qcow2 tinyCentosTmp.qcow2
# cp tinyCentos.qcow2 tinyCentos30.qcow2
2.view all file systems:
[root@s4-5 templates]# virt-filesystems --long -h --all -a tinyCentos30.qcow2
Name Type VFS Label MBR Size Parent
/dev/sda1 filesystem ext4 - - 500M -
/dev/VolGroup/lv_root filesystem ext4 - - 3.5G -
/dev/VolGroup/lv_swap filesystem swap - - 1.0G -
/dev/VolGroup/lv_root lv - - - 3.5G /dev/VolGroup
/dev/VolGroup/lv_swap lv - - - 1.0G /dev/VolGroup
/dev/VolGroup vg - - - 4.5G /dev/sda2
/dev/sda2 pv - - - 4.5G -
/dev/sda1 partition - - 83 500M /dev/sda
/dev/sda2 partition - - 8e 4.5G /dev/sda
/dev/sda device - - - 5.0G -
3.enlarge the image by 30Gb:
[root@s4-5 templates]# qemu-img resize tinyCentos30.qcow2 +30G
Image resized.
4.View the filesystems after enlargement:
[root@s4-5 templates]# virt-filesystems --long -h --all -a tinyCentos30.qcow2
Name Type VFS Label MBR Size Parent
/dev/sda1 filesystem ext4 - - 500M -
/dev/VolGroup/lv_root filesystem ext4 - - 3.5G -
/dev/VolGroup/lv_swap filesystem swap - - 1.0G -
/dev/VolGroup/lv_root lv - - - 3.5G /dev/VolGroup
/dev/VolGroup/lv_swap lv - - - 1.0G /dev/VolGroup
/dev/VolGroup vg - - - 4.5G /dev/sda2
/dev/sda2 pv - - - 4.5G -
/dev/sda1 partition - - 83 500M /dev/sda
/dev/sda2 partition - - 8e 4.5G /dev/sda
/dev/sda device - - - 35G -
5.resize the lvm partitions:
[root@s4-5 templates]# virt-resize --expand /dev/sda2 --LV-expand /dev/VolGroup/lv_root tinyCentosTmp.qcow2 tinyCentos30.qcow2
Examining tinyCentosTmp.qcow2 ...
**********
Summary of changes:
/dev/sda1: This partition will be left alone.
/dev/sda2: This partition will be resized from 4.5G to 34.5G. The LVM
PV on /dev/sda2 will be expanded using the 'pvresize' method.
/dev/VolGroup/lv_root: This logical volume will be expanded to maximum
size. The filesystem ext4 on /dev/VolGroup/lv_root will be
expanded using the 'resize2fs' method.
**********
Setting up initial partition table on tinyCentos30.qcow2 ...
Copying /dev/sda1 ...
100% ⟦▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒⟧ 00:00
Copying /dev/sda2 ...
100% ⟦▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒⟧ 00:00
Expanding /dev/sda2 using the 'pvresize' method ...
Expanding /dev/VolGroup/lv_root using the 'resize2fs' method ...
Resize operation completed with no errors. Before deleting the old
disk, carefully check that the resized disk boots and works correctly.
[root@s4-5 templates]#
6.Optional if you want to compress it run:
[root@s4-5 ready_for]# qemu-img convert -c -f qcow2 -O qcow2 tinyCentos30.qcow2 tinyCentos30diet.qcow2
[root@s4-5 ready_for]# ll
-rw-r--r-- 1 root root 307429376 Sep 3 02:08 tinyCentos30diet.qcow2
-rw-r--r-- 1 root root 5854593024 Sep 3 01:15 tinyCentos30.qcow2
-rw-r--r-- 1 root root 943587328 Jun 22 06:02 tinyCentos.qcow2
-rw-r--r-- 1 root root 943587328 Sep 3 01:08 tinyCentosTmp.qcow2
[root@s4-5 ready_for]#
#######################################################################################################################################################################################################################
resize Image using virt-resize i.e. guestfish
#######################################################################################################################################################################################################################
1.copy the original image twice not to harm the original
# cp tinyCentos.qcow2 tinyCentosTmp.qcow2
# cp tinyCentos.qcow2 tinyCentos30.qcow2
2.view all file systems:
[root@s4-5 templates]# virt-filesystems --long -h --all -a tinyCentos30.qcow2
Name Type VFS Label MBR Size Parent
/dev/sda1 filesystem ext4 - - 500M -
/dev/VolGroup/lv_root filesystem ext4 - - 3.5G -
/dev/VolGroup/lv_swap filesystem swap - - 1.0G -
/dev/VolGroup/lv_root lv - - - 3.5G /dev/VolGroup
/dev/VolGroup/lv_swap lv - - - 1.0G /dev/VolGroup
/dev/VolGroup vg - - - 4.5G /dev/sda2
/dev/sda2 pv - - - 4.5G -
/dev/sda1 partition - - 83 500M /dev/sda
/dev/sda2 partition - - 8e 4.5G /dev/sda
/dev/sda device - - - 5.0G -
3.enlarge the image by 30Gb:
[root@s4-5 templates]# qemu-img resize tinyCentos30.qcow2 +30G
Image resized.
4.View the filesystems after enlargement:
[root@s4-5 templates]# virt-filesystems --long -h --all -a tinyCentos30.qcow2
Name Type VFS Label MBR Size Parent
/dev/sda1 filesystem ext4 - - 500M -
/dev/VolGroup/lv_root filesystem ext4 - - 3.5G -
/dev/VolGroup/lv_swap filesystem swap - - 1.0G -
/dev/VolGroup/lv_root lv - - - 3.5G /dev/VolGroup
/dev/VolGroup/lv_swap lv - - - 1.0G /dev/VolGroup
/dev/VolGroup vg - - - 4.5G /dev/sda2
/dev/sda2 pv - - - 4.5G -
/dev/sda1 partition - - 83 500M /dev/sda
/dev/sda2 partition - - 8e 4.5G /dev/sda
/dev/sda device - - - 35G -
5.resize the lvm partitions:
[root@s4-5 templates]# virt-resize --expand /dev/sda2 --LV-expand /dev/VolGroup/lv_root tinyCentosTmp.qcow2 tinyCentos30.qcow2
Examining tinyCentosTmp.qcow2 ...
**********
Summary of changes:
/dev/sda1: This partition will be left alone.
/dev/sda2: This partition will be resized from 4.5G to 34.5G. The LVM
PV on /dev/sda2 will be expanded using the 'pvresize' method.
/dev/VolGroup/lv_root: This logical volume will be expanded to maximum
size. The filesystem ext4 on /dev/VolGroup/lv_root will be
expanded using the 'resize2fs' method.
**********
Setting up initial partition table on tinyCentos30.qcow2 ...
Copying /dev/sda1 ...
100% ⟦▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒⟧ 00:00
Copying /dev/sda2 ...
100% ⟦▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒⟧ 00:00
Expanding /dev/sda2 using the 'pvresize' method ...
Expanding /dev/VolGroup/lv_root using the 'resize2fs' method ...
Resize operation completed with no errors. Before deleting the old
disk, carefully check that the resized disk boots and works correctly.
[root@s4-5 templates]#
6.Optional if you want to compress it run:
[root@s4-5 ready_for]# qemu-img convert -c -f qcow2 -O qcow2 tinyCentos30.qcow2 tinyCentos30diet.qcow2
[root@s4-5 ready_for]# ll
-rw-r--r-- 1 root root 307429376 Sep 3 02:08 tinyCentos30diet.qcow2
-rw-r--r-- 1 root root 5854593024 Sep 3 01:15 tinyCentos30.qcow2
-rw-r--r-- 1 root root 943587328 Jun 22 06:02 tinyCentos.qcow2
-rw-r--r-- 1 root root 943587328 Sep 3 01:08 tinyCentosTmp.qcow2
[root@s4-5 ready_for]#
How to re-size a qcow2 image?
#stop VM and from the hypervisor resize its disk
[root@compute-0-0 ~]# qemu-img resize /zone01/image.qcow2 +35G
Image resized.
-----------------------------------------------------------------------------------------------
#start the VM and login to it
#run fdisk -l
[root@dev ~]# fdisk -l
Disk /dev/vda: 69.8 GB, 69793218560 bytes
16 heads, 63 sectors/track, 135233 cylinders
Units = cylinders of 1008 * 512 = 516096 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00043b46
Device Boot Start End Blocks Id System
/dev/vda1 * 3 1018 512000 83 Linux
Partition 1 does not end on cylinder boundary.
/dev/vda2 1018 62416 30944256 8e Linux LVM
Partition 2 does not end on cylinder boundary.
Disk /dev/mapper/vg_dev-lv_root: 25.4 GB, 25375539200 bytes
255 heads, 63 sectors/track, 3085 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000
Disk /dev/mapper/vg_dev-lv_root doesn't contain a valid partition table
Disk /dev/mapper/vg_dev-lv_swap: 6308 MB, 6308233216 bytes
255 heads, 63 sectors/track, 766 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000
Disk /dev/mapper/vg_dev-lv_swap doesn't contain a valid partition table
[root@dev ~]#
-----------------------------------------------------------------------------------------------
#run fdisk on the extended dev
[root@dev ~]# fdisk /dev/vda
WARNING: DOS-compatible mode is deprecated. It's strongly recommended to
switch off the mode (command 'c') and change display units to
sectors (command 'u').
Command (m for help): n
Command action
e extended
p primary partition (1-4)
p
Partition number (1-4): 3
First cylinder (1-135233, default 1): 62417
Last cylinder, +cylinders or +size{K,M,G} (62417-135233, default 135233):
Using default value 135233
Command (m for help): t
Partition number (1-4): 3
Hex code (type L to list codes): 8e
Changed system type of partition 3 to 8e (Linux LVM)
Command (m for help): p
Disk /dev/vda: 69.8 GB, 69793218560 bytes
16 heads, 63 sectors/track, 135233 cylinders
Units = cylinders of 1008 * 512 = 516096 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00043b46
Device Boot Start End Blocks Id System
/dev/vda1 * 3 1018 512000 83 Linux
Partition 1 does not end on cylinder boundary.
/dev/vda2 1018 62416 30944256 8e Linux LVM
Partition 2 does not end on cylinder boundary.
/dev/vda3 62417 135233 36699768 8e Linux LVM
Command (m for help): w
The partition table has been altered!
Calling ioctl() to re-read partition table.
WARNING: Re-reading the partition table failed with error 16: Device or resource busy.
The kernel still uses the old table. The new table will be used at
the next reboot or after you run partprobe(8) or kpartx(8)
Syncing disks.
-----------------------------------------------------------------------------------------------
#reboot the vm
#when the VM goes up:
[root@dev ~]# pvscan
PV /dev/vda2 VG vg_dev lvm2 [29.51 GiB / 0 free]
Total: 1 [29.51 GiB] / in use: 1 [29.51 GiB] / in no VG: 0 [0 ]
[root@dev ~]#
-----------------------------------------------------------------------------------------------
#create Physical volume
[root@dev ~]# pvcreate /dev/vda3
Writing physical volume data to disk "/dev/vda3"
Physical volume "/dev/vda3" successfully created
[root@dev ~]#
-----------------------------------------------------------------------------------------------
#extend Volume group
[root@dev ~]# vgextend vg_dev /dev/vda3
Volume group "vg_dev" successfully extended
[root@dev ~]# pvscan
PV /dev/vda2 VG vg_dev lvm2 [29.51 GiB / 0 free]
PV /dev/vda3 VG vg_dev lvm2 [35.00 GiB / 35.00 GiB free]
Total: 2 [64.50 GiB] / in use: 2 [64.50 GiB] / in no VG: 0 [0 ]
[root@dev ~]#
-----------------------------------------------------------------------------------------------
#Extending logical volume
[root@dev ~]# lvextend -L+34G /dev/vg_dev/lv_root
Extending logical volume lv_root to 57.63 GiB
Logical volume lv_root successfully resized
[root@dev ~]#
-----------------------------------------------------------------------------------------------
#resizing the file system
[root@dev ~]# resize2fs /dev/vg_dev/lv_root
resize2fs 1.41.12 (17-May-2010)
Filesystem at /dev/vg_dev/lv_root is mounted on /; on-line resizing required
old desc_blocks = 2, new_desc_blocks = 4
Performing an on-line resize of /dev/vg_dev/lv_root to 15108096 (4k) blocks.
The filesystem on /dev/vg_dev/lv_root is now 15108096 blocks long.
[root@dev ~]#
[root@dev ~]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/vg_dev-lv_root
57G 3.5G 51G 7% /
tmpfs 1.9G 88K 1.9G 1% /dev/shm
/dev/vda1 485M 36M 424M 8% /boot
[root@dev ~]#
more commands:
#Extend to all free size
lvextend -l+100%FREE /dev/VolGroup/lv_home
#show vol groups
vgdisplay
#stop VM and from the hypervisor resize its disk
[root@compute-0-0 ~]# qemu-img resize /zone01/image.qcow2 +35G
Image resized.
-----------------------------------------------------------------------------------------------
#start the VM and login to it
#run fdisk -l
[root@dev ~]# fdisk -l
Disk /dev/vda: 69.8 GB, 69793218560 bytes
16 heads, 63 sectors/track, 135233 cylinders
Units = cylinders of 1008 * 512 = 516096 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00043b46
Device Boot Start End Blocks Id System
/dev/vda1 * 3 1018 512000 83 Linux
Partition 1 does not end on cylinder boundary.
/dev/vda2 1018 62416 30944256 8e Linux LVM
Partition 2 does not end on cylinder boundary.
Disk /dev/mapper/vg_dev-lv_root: 25.4 GB, 25375539200 bytes
255 heads, 63 sectors/track, 3085 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000
Disk /dev/mapper/vg_dev-lv_root doesn't contain a valid partition table
Disk /dev/mapper/vg_dev-lv_swap: 6308 MB, 6308233216 bytes
255 heads, 63 sectors/track, 766 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000
Disk /dev/mapper/vg_dev-lv_swap doesn't contain a valid partition table
[root@dev ~]#
-----------------------------------------------------------------------------------------------
#run fdisk on the extended dev
[root@dev ~]# fdisk /dev/vda
WARNING: DOS-compatible mode is deprecated. It's strongly recommended to
switch off the mode (command 'c') and change display units to
sectors (command 'u').
Command (m for help): n
Command action
e extended
p primary partition (1-4)
p
Partition number (1-4): 3
First cylinder (1-135233, default 1): 62417
Last cylinder, +cylinders or +size{K,M,G} (62417-135233, default 135233):
Using default value 135233
Command (m for help): t
Partition number (1-4): 3
Hex code (type L to list codes): 8e
Changed system type of partition 3 to 8e (Linux LVM)
Command (m for help): p
Disk /dev/vda: 69.8 GB, 69793218560 bytes
16 heads, 63 sectors/track, 135233 cylinders
Units = cylinders of 1008 * 512 = 516096 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00043b46
Device Boot Start End Blocks Id System
/dev/vda1 * 3 1018 512000 83 Linux
Partition 1 does not end on cylinder boundary.
/dev/vda2 1018 62416 30944256 8e Linux LVM
Partition 2 does not end on cylinder boundary.
/dev/vda3 62417 135233 36699768 8e Linux LVM
Command (m for help): w
The partition table has been altered!
Calling ioctl() to re-read partition table.
WARNING: Re-reading the partition table failed with error 16: Device or resource busy.
The kernel still uses the old table. The new table will be used at
the next reboot or after you run partprobe(8) or kpartx(8)
Syncing disks.
-----------------------------------------------------------------------------------------------
#reboot the vm
#when the VM goes up:
[root@dev ~]# pvscan
PV /dev/vda2 VG vg_dev lvm2 [29.51 GiB / 0 free]
Total: 1 [29.51 GiB] / in use: 1 [29.51 GiB] / in no VG: 0 [0 ]
[root@dev ~]#
-----------------------------------------------------------------------------------------------
#create Physical volume
[root@dev ~]# pvcreate /dev/vda3
Writing physical volume data to disk "/dev/vda3"
Physical volume "/dev/vda3" successfully created
[root@dev ~]#
-----------------------------------------------------------------------------------------------
#extend Volume group
[root@dev ~]# vgextend vg_dev /dev/vda3
Volume group "vg_dev" successfully extended
[root@dev ~]# pvscan
PV /dev/vda2 VG vg_dev lvm2 [29.51 GiB / 0 free]
PV /dev/vda3 VG vg_dev lvm2 [35.00 GiB / 35.00 GiB free]
Total: 2 [64.50 GiB] / in use: 2 [64.50 GiB] / in no VG: 0 [0 ]
[root@dev ~]#
-----------------------------------------------------------------------------------------------
#Extending logical volume
[root@dev ~]# lvextend -L+34G /dev/vg_dev/lv_root
Extending logical volume lv_root to 57.63 GiB
Logical volume lv_root successfully resized
[root@dev ~]#
-----------------------------------------------------------------------------------------------
#resizing the file system
[root@dev ~]# resize2fs /dev/vg_dev/lv_root
resize2fs 1.41.12 (17-May-2010)
Filesystem at /dev/vg_dev/lv_root is mounted on /; on-line resizing required
old desc_blocks = 2, new_desc_blocks = 4
Performing an on-line resize of /dev/vg_dev/lv_root to 15108096 (4k) blocks.
The filesystem on /dev/vg_dev/lv_root is now 15108096 blocks long.
[root@dev ~]#
[root@dev ~]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/vg_dev-lv_root
57G 3.5G 51G 7% /
tmpfs 1.9G 88K 1.9G 1% /dev/shm
/dev/vda1 485M 36M 424M 8% /boot
[root@dev ~]#
more commands:
#Extend to all free size
lvextend -l+100%FREE /dev/VolGroup/lv_home
#show vol groups
vgdisplay
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