Computerhok 2013#
Table of Contents
- Computerhok 2013
- Intro
- Functions to be ported from old to new
- VirtualBox
- Work in progress / install log
- Ubuntu 12.04.1 LTS
- kernel recompile
- VirtualBox installation
- VirtualBox cloning/snapshotting
- Extra installed packages
- Extra installed packages for the Host
- Extra installed packages for the container(s)
- Install/migrate Gallery
- Forget about gallery3
- zabbix 2.0 experiment
- firewall configurations
- apollo
- cn1
- Miscellaneous
- lxc-rsync
- lxc-copy
- fail2ban
Intro#
The old computerhok is running for almost 5 years now (Ubuntu 8.04, both hypervisor and guests), time for something new. We went live on Sunday 2013-02-24!Functions to be ported from old to new#
- Gallery
- JSPWiki, including apache frontend
- home for geocaching hof images
- nagios (on a separate guest or on hypervisor?)
- fail2ban like solution (see current ~/bin/cron/blockHost.sh)
- backuphost for krm2DB
- a backup hardware node on remote location, and easy backup
- dhfds
- http://www.esthercreations.nl
can retire
- webmin still necessary ?
- mail server (not open relay!, see /etc/postfix/main.cf)
- uptime script
- OpenVZ logo should go from homepage
VirtualBox#
We will no longer use OpenVZ, it is too restrictive in choice of guest OS'es.
We intend to use VirtualBox as hypervisor, and Ubuntu 12.04 LTS as both host and guest OS.
After doing some experiments I decided to leave Virtualbox:
- it is poorly documented (only "click here, click that", no good reference of all command options)
- you cannot resize harddisks (anymore ?)
- unstable, vboxdrv driver modules disappearing for unknown reasons
I stumbled upon lxc, so I started figuring out what that offers, see here my experiments with lxc.
Work in progress / install log#
Ubuntu 12.04.1 LTS#
- Installed Ubuntu 12.04.1 LTS from USB stick.
- LVM setup and 10GB root partitiion
- temporary wlan0 (wireless) as primary interface
- IP address 10.0.0.150
- only SSH server
- Locales: en_US.UTF-8 and nl_NL.UTF-8 (first one default)
kernel recompile#
- recompile kernel because of DSDT issue
VirtualBox installation#
- install packages
- add deb http://download.virtualbox.org/virtualbox/debian precise contrib
- add the apt key : sudo apt-key add oracle_vbox.asc
- apt-get install virtualbox-4.2
- install extension pack
root@apollo:~/Downloads# sudo VBoxManage extpack install Oracle_VM_VirtualBox_Extension_Pack-4.2.6-82870.vbox-extpack 0%...10%...20%...30%...40%...50%...60%...70%...80%...90%...100% Successfully installed "Oracle VM VirtualBox Extension Pack". root@apollo:~/Downloads#
- create test VM:
root@apollo:~# VBoxManage createvm --name Ubuntu1 --ostype Linux --register Virtual machine 'Ubuntu1' is created and registered. UUID: 1ed5e417-1eca-4a60-b6d4-5c8f40e44019 Settings file: '/root/VirtualBox VMs/Ubuntu1/Ubuntu1.vbox' root@apollo:~#
- modify attributes (more memory, VT off, network bridged instead of NAT:
VBoxManage modifyvm Ubuntu1 --memory=512 --hwvirtex=off --hwvirtexexcl=off --vtxvpid=off --boot1=dvd --boot2=disk --boot3=none --nic1=bridged --bridgeadapter1=wlan0 --nicpromisc1=allow-all --vrde=on --vrdeport=13389
- Deleted the kernel source again to free up some disk space:
root@apollo:~/src# du -cms linux-source-3.2.0/ 5172 linux-source-3.2.0/ 5172 total root@apollo:~/src# df -h . Filesystem Size Used Avail Use% Mounted on /dev/sda7 9.2G 6.6G 2.2G 76% / root@apollo:~/src# rm -rf linux-source-3.2.0/ root@apollo:~/src# df -h . Filesystem Size Used Avail Use% Mounted on /dev/sda7 9.2G 1.6G 7.2G 18% /
- Add CD and disk controller:
VBoxManage storagectl Ubuntu1 --name='IDE Controller' --add=ide --controller=PIIX4 --bootable=on VBoxManage storagectl Ubuntu1 --name='SATA Controller' --add=sata --controller=IntelAhci --bootable=on
- show me how you look now:
root@apollo:~/VirtualBox VMs/Ubuntu1# VBoxManage showvminfo Ubuntu1 Name: Ubuntu1 Groups: / Guest OS: Other Linux UUID: 1ed5e417-1eca-4a60-b6d4-5c8f40e44019 Config file: /root/VirtualBox VMs/Ubuntu1/Ubuntu1.vbox Snapshot folder: /root/VirtualBox VMs/Ubuntu1/Snapshots Log folder: /root/VirtualBox VMs/Ubuntu1/Logs Hardware UUID: 1ed5e417-1eca-4a60-b6d4-5c8f40e44019 Memory size: 512MB Page Fusion: off VRAM size: 8MB CPU exec cap: 100% HPET: off Chipset: piix3 Firmware: BIOS Number of CPUs: 1 Synthetic Cpu: off CPUID overrides: None Boot menu mode: message and menu Boot Device (1): DVD Boot Device (2): HardDisk Boot Device (3): Not Assigned Boot Device (4): Not Assigned ACPI: on IOAPIC: off PAE: off Time offset: 0ms RTC: local time Hardw. virt.ext: off Hardw. virt.ext exclusive: off Nested Paging: on Large Pages: off VT-x VPID: off State: powered off (since 2013-01-26T17:41:58.000000000) Monitor count: 1 3D Acceleration: off 2D Video Acceleration: off Teleporter Enabled: off Teleporter Port: 0 Teleporter Address: Teleporter Password: Tracing Enabled: off Allow Tracing to Access VM: off Tracing Configuration: Autostart Enabled: off Autostart Delay: 0 Storage Controller Name (0): IDE Controller Storage Controller Type (0): PIIX4 Storage Controller Instance Number (0): 0 Storage Controller Max Port Count (0): 2 Storage Controller Port Count (0): 2 Storage Controller Bootable (0): on Storage Controller Name (1): SATA Controller Storage Controller Type (1): IntelAhci Storage Controller Instance Number (1): 0 Storage Controller Max Port Count (1): 30 Storage Controller Port Count (1): 30 Storage Controller Bootable (1): on NIC 1: MAC: 0800276CD273, Attachment: Bridged Interface 'wlan0', Cable connected: on, Trace: off (file: none), Type: Am79C973, Reported speed: 0 Mbps, Boot priority: 0, Promisc Policy: allow-all, Bandwidth group: none NIC 2: disabled NIC 3: disabled NIC 4: disabled NIC 5: disabled NIC 6: disabled NIC 7: disabled NIC 8: disabled Pointing Device: PS/2 Mouse Keyboard Device: PS/2 Keyboard UART 1: disabled UART 2: disabled LPT 1: disabled LPT 2: disabled Audio: disabled Clipboard Mode: disabled Drag'n'drop Mode: disabled VRDE: enabled (Address 0.0.0.0, Ports 13389, MultiConn: off, ReuseSingleConn: off, Authentication type: null) Video redirection: disabled USB: disabled EHCI: disabled USB Device Filters: <none> Available remote USB devices: <none> Currently Attached USB Devices: <none> Bandwidth groups: <none> Shared folders: <none> VRDE Connection: not active Clients so far: 0 Guest: Configured memory balloon size: 0 MB
- attach the CD image
VBoxManage storageattach Ubuntu1 --storagectl='IDE Controller' --port=1 --device=1 --type=dvddrive --medium=/tmp/ff/ubuntu-12.04.1-server-i386.iso
- create HD:
VBoxManage createhd --filename '/root/VirtualBox VMs/Ubuntu1/disk1.vdi' --size=15000
- attach HD:
VBoxManage storageattach Ubuntu1 --storagectl='SATA Controller' --port=1 --device=0 --type=hdd --medium='/root/VirtualBox VMs/Ubuntu1/disk1.vdi'
- fire up the VM :
root@apollo:~/Downloads# VBoxHeadless --startvm Ubuntu1 Oracle VM VirtualBox Headless Interface 4.2.6 (C) 2008-2012 Oracle Corporation All rights reserved. VRDE server is listening on port 13389.
VirtualBox cloning/snapshotting#
Take a snapshot of a running VM:
VBoxManage snapshot Ubuntu1 take snapshot01 --description "first snapshot, almost vanilla ubuntu"
This commands ends fine, but the VM hangs, even no response from external pings anymore.
VRDP just shows a black screen.
Looks like it is paused (even if not specified on the snapshot subcommand):
root@apollo:~# VBoxManage showvminfo Ubuntu1 --details|grep -i state State: paused (since 2013-01-27T15:23:36.808000000) root@apollo:~#So try to resume it: root@apollo:# VBoxManage controlvm Ubuntu1 resume root@apollo:# VBoxManage showvminfo Ubuntu1 --details|grep -i state State: running (since 2013-01-27T15:40:09.024000000) root@apollo:# }}} And yes it is running again.
Now clone this snapshot to a second machine:
root@apollo:~# VBoxManage clonevm Ubuntu1 --snapshot snapshot01 --options keepdisknames --name Ubuntu2 --register 0%...10%...20%...30%...40%...50%...60%...70%...80%...90%...100% Machine has been successfully cloned as "Ubuntu2" root@apollo:~#(This takes a few minutes).
But then we have :
root@apollo:~# VBoxManage list vms
"Ubuntu1" {1ed5e417-1eca-4a60-b6d4-5c8f40e44019}
"Ubuntu2" {e82b1ffb-21be-45e1-b467-c84cf5fda1a1}
root@apollo:~#
Change the vrdeport (should not be the same as the first machine):
VBoxManage modifyvm Ubuntu2 --vrdeport 13390
And fire up the thing:
root@apollo:~# VBoxHeadless --startvm Ubuntu2 Oracle VM VirtualBox Headless Interface 4.2.6 (C) 2008-2012 Oracle Corporation All rights reserved. VRDE server is listening on port 13390.
The first boot takes a bit longer, because of an fsck that runs because it thinks the fs was not cleanly unmounted.
First login through the VRDP console and change hostname with hostname ubuntu2 and editing /etc/hostname.
I also note that network device eth0 does not come up.
dmesg shows that udev has renamed eth0 to eth1, that sounds familiar: remove /etc/udev/rules.d/70-persistent-net.rules
- listing HD's and cloning a harddisk:
root@apollo:~# vb list hdds
UUID: fc263d6a-18d4-4bda-a987-d8ffdc2a11b3
Parent UUID: base
Format: VDI
Location: /root/VirtualBox VMs/Ubuntu1/disk1.vdi
State: locked read
Type: normal
Usage: Ubuntu1 (UUID: 1ed5e417-1eca-4a60-b6d4-5c8f40e44019) [snapshot01 (UUID: 36426ba8-c819-45a3-87e5-e0d599cfc309)]
UUID: 88a8d294-cb4c-4881-b42b-286b25b3ab3e
Parent UUID: fc263d6a-18d4-4bda-a987-d8ffdc2a11b3
Format: VDI
Location: /root/VirtualBox VMs/Ubuntu1/Snapshots/{88a8d294-cb4c-4881-b42b-286b25b3ab3e}.vdi
State: locked write
Type: normal
Usage: Ubuntu1 (UUID: 1ed5e417-1eca-4a60-b6d4-5c8f40e44019)
UUID: fb289305-27fc-4344-bfb2-75942cbb1252
Parent UUID: base
Format: VDI
Location: /root/VirtualBox VMs/Ubuntu2/disk1.vdi
State: locked write
Type: normal
Usage: Ubuntu2 (UUID: e82b1ffb-21be-45e1-b467-c84cf5fda1a1)
root@apollo:~# vb clonehd fc263d6a-18d4-4bda-a987-d8ffdc2a11b3 /tmp/cloned.from.ubuntu1
0%...10%...20%...30%...40%...50%...60%...70%...80%...90%...100%
Clone hard disk created in format 'VDI'. UUID: 8a06d36c-13f0-4275-abe7-ebc64bff59a4
root@apollo:~# vb list hdds
UUID: fc263d6a-18d4-4bda-a987-d8ffdc2a11b3
Parent UUID: base
Format: VDI
Location: /root/VirtualBox VMs/Ubuntu1/disk1.vdi
State: locked read
Type: normal
Usage: Ubuntu1 (UUID: 1ed5e417-1eca-4a60-b6d4-5c8f40e44019) [snapshot01 (UUID: 36426ba8-c819-45a3-87e5-e0d599cfc309)]
UUID: 88a8d294-cb4c-4881-b42b-286b25b3ab3e
Parent UUID: fc263d6a-18d4-4bda-a987-d8ffdc2a11b3
Format: VDI
Location: /root/VirtualBox VMs/Ubuntu1/Snapshots/{88a8d294-cb4c-4881-b42b-286b25b3ab3e}.vdi
State: locked write
Type: normal
Usage: Ubuntu1 (UUID: 1ed5e417-1eca-4a60-b6d4-5c8f40e44019)
UUID: fb289305-27fc-4344-bfb2-75942cbb1252
Parent UUID: base
Format: VDI
Location: /root/VirtualBox VMs/Ubuntu2/disk1.vdi
State: locked write
Type: normal
Usage: Ubuntu2 (UUID: e82b1ffb-21be-45e1-b467-c84cf5fda1a1)
UUID: 8a06d36c-13f0-4275-abe7-ebc64bff59a4
Parent UUID: base
Format: VDI
Location: /tmp/cloned.from.ubuntu1
State: created
Type: normal
Now, you cannot just copy these files over :
root@apollo:~/VirtualBox VMs/Ubuntu2# cat /tmp/cloned.from.ubuntu1 > disk1.vdi
root@apollo:~/VirtualBox VMs/Ubuntu2# vb list vms
"Ubuntu1" {1ed5e417-1eca-4a60-b6d4-5c8f40e44019}
"Ubuntu2" {e82b1ffb-21be-45e1-b467-c84cf5fda1a1}
root@apollo:~/VirtualBox VMs/Ubuntu2# vb startvm Ubuntu2
Waiting for VM "Ubuntu2" to power on...
VBoxManage: error: The virtual machine 'Ubuntu2' has terminated unexpectedly during startup with exit code 0
VBoxManage: error: Details: code NS_ERROR_FAILURE (0x80004005), component Machine, interface IMachine
root@apollo:~/VirtualBox VMs/Ubuntu2#
So now "detach" this disk again by "attaching none" :
VBoxManage storageattach Ubuntu1 --storagectl='SATA Controller' --port=1 --device=0 --type=hdd --medium none
- also detach from Ubuntu2 and delete the disk :
VBoxManage storageattach Ubuntu2 --storagectl='SATA Controller' --port=1 --device=0 --type=hdd --medium=none VBoxManage closemedium disk fb289305-27fc-4344-bfb2-75942cbb1252 --delete
- and attach the snapshotted disk to Ubuntu2 (I first renamed/moved the cloned hdd), and make it bootable:
VBoxManage storageattach Ubuntu2 --storagectl='SATA Controller' --port=1 --device=0 --type=hdd --medium='/root/VirtualBox VMs/Ubuntu2/disk1.vdi' VBoxManage modifyvm Ubuntu2 --boot1 disk
- After booting the machine:
- remove the /etc/udev/rules.d/70...net... file.
- update the /etc/network/interfaces to make it a static IP adres:
#iface eth0 inet dhcp
iface eth0 inet static
address 10.0.0.155
netmask 255.255.255.0
network 10.0.0.0
broadcast 10.0.0.255
gateway 10.0.0.138
# dns-* options are implemented by the resolvconf package, if installed
dns-nameservers 213.197.28.3 213.197.30.28
dns-search computerhok.nl
- change the /etc/hostname
Extra installed packages#
Extra installed packages for the Host#
- See DSDT issue
- vim htop openjdk-7-jdk wget mailutils lsof uuid fsarchiver
Extra installed packages for the container(s)#
- htop apache2 aptitude unzip locate fping postfix telnet mailutils lsof
sudo sh -c 'echo "deb http://ftp.osuosl.org/pub/mariadb/repo/5.5/ubuntu precise main" >> /etc/apt/sources.list.d/mariadb.list'
- mariadb-server mariadb-client
- imagemagick
- php5-imagick
- man-db
Install/migrate Gallery#
- Download the Gallery 3 zip
- unpack to /var/www/gallery3
- mkdir /var/www/gallery3/var
- chown www-data.www-data /var/www/gallery3
- install mariadb (root pw see keepass)
MariaDB [(none)]> create user 'gallery3'@'localhost' identified by "gallery3pw"; Query OK, 0 rows affected (0.00 sec) MariaDB [(none)]> create database gallery3; Query OK, 1 row affected (0.00 sec) MariaDB [(none)]> grant all privileges on gallery3.* to gallery3; Query OK, 0 rows affected (0.00 sec)
- install php stuff:
- add deb http://ppa.launchpad.net/ondrej/php5/ubuntu precise main to /etc/apt/sources.list
sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 4F4EA0AAE5267A6C sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys CBCB082A1BB943DB apt-get update
- apt-get install php5-common libapache2-mod-php5 php5-mysql php5-gd
Now before copying over photo's from the old site, we first have to increase the filesystem space.
- shut down container
- lvcreate --size=20G --name=lvol.cn1 vg0
- cd /var/lib/lxc
- mv cn1 cn1.ff && mkdir cn1
- mkfs.ext4 /dev/vg0/lvol.cn1
- update /etc/fstab and issue mount -a
- cd /var/lib/lxc && cp -pR cn1.ff/* cn1
Forget about gallery3#
After a couple of hours trying/googling I gave up on migrating from gallery2 to gallery3.
zabbix 2.0 experiment#
cn4 cloned for this purpose
- installed mariadb
- downloaded and untarred zabbix-server 2.0
- group and user zabbix created
- installed mariadb, including the devel package libmariadbclient-dev
- follow the default installation procedure from the zabbix website
- create user zabbix
- create database zabbix, dbuser zabbix/zabbixpw
- loaded the tables
- modified /etc/php5/apache2/php.ini
- created dir /var/log/zabbix
- modified /usr/local/etc/zabbix*
- (copied from ./misc dir) to /etc/init : upstart config files (adding setuid zabbix)
firewall configurations#
apollo#
Stuck into /etc/rc.local:
/sbin/iptables -F /sbin/iptables -F -t nat /sbin/iptables -A INPUT -m state --state RELATED,ESTABLISHED -j ACCEPT /sbin/iptables -A INPUT -p icmp -j ACCEPT /sbin/iptables -A INPUT -i lo -j ACCEPT /sbin/iptables -A INPUT -i lxcbr0 -j ACCEPT /sbin/iptables -A INPUT -s 10.0.0.0/24 -j ACCEPT /sbin/iptables -A INPUT -s 10.0.3.1/24 -j ACCEPT /sbin/iptables -A INPUT -s 140.211.11.9 -j ACCEPT /sbin/iptables -A INPUT -s 145.72.98.1 -j ACCEPT #/sbin/iptables -A INPUT -j LOG /sbin/iptables -A INPUT -j DROP /sbin/iptables -A PREROUTING -t nat -i eth0 -p tcp --dport 1122 -j DNAT --to 10.0.3.11:22 /sbin/iptables -A PREROUTING -t nat -i eth0 -p tcp --dport 1125 -j DNAT --to 10.0.3.11:25 /sbin/iptables -A PREROUTING -t nat -i eth0 -p tcp --dport 1180 -j DNAT --to 10.0.3.11:80 /sbin/iptables -A PREROUTING -t nat -i eth0 -p tcp --dport 11443 -j DNAT --to 10.0.3.11:443 /sbin/iptables -A PREROUTING -t nat -i eth0 -p tcp --dport 11808 -j DNAT --to 10.0.3.11:8080 # /sbin/iptables -A PREROUTING -t nat -i eth0 -p tcp --dport 1222 -j DNAT --to 10.0.3.12:22 /sbin/iptables -A PREROUTING -t nat -i eth0 -p tcp --dport 1225 -j DNAT --to 10.0.3.12:25 /sbin/iptables -A PREROUTING -t nat -i eth0 -p tcp --dport 1280 -j DNAT --to 10.0.3.12:80 /sbin/iptables -A PREROUTING -t nat -i eth0 -p tcp --dport 12443 -j DNAT --to 10.0.3.12:443 # /sbin/iptables -A PREROUTING -t nat -i eth0 -p tcp --dport 1322 -j DNAT --to 10.0.3.13:22 /sbin/iptables -A PREROUTING -t nat -i eth0 -p tcp --dport 1325 -j DNAT --to 10.0.3.13:25 /sbin/iptables -A PREROUTING -t nat -i eth0 -p tcp --dport 1380 -j DNAT --to 10.0.3.13:80 /sbin/iptables -A PREROUTING -t nat -i eth0 -p tcp --dport 13443 -j DNAT --to 10.0.3.13:443 # /sbin/iptables -A PREROUTING -t nat -i eth0 -p tcp --dport 1422 -j DNAT --to 10.0.3.14:22 /sbin/iptables -A PREROUTING -t nat -i eth0 -p tcp --dport 1425 -j DNAT --to 10.0.3.14:25 /sbin/iptables -A PREROUTING -t nat -i eth0 -p tcp --dport 1480 -j DNAT --to 10.0.3.14:80 /sbin/iptables -A PREROUTING -t nat -i eth0 -p tcp --dport 14443 -j DNAT --to 10.0.3.14:443
cn1#
Stuck into /etc/rc.local:
/sbin/iptables -F /sbin/iptables -A INPUT -m state --state RELATED,ESTABLISHED -j ACCEPT /sbin/iptables -A INPUT -p icmp -j ACCEPT /sbin/iptables -A INPUT -i lo -j ACCEPT /sbin/iptables -A INPUT -s 10.0.0.0/24 -j ACCEPT /sbin/iptables -A INPUT -s 10.0.3.0/24 -j ACCEPT /sbin/iptables -A INPUT -s 140.211.11.9 -j ACCEPT /sbin/iptables -A INPUT -s 145.72.98.1 -j ACCEPT /sbin/iptables -A INPUT -s 178.18.80.48 -j ACCEPT /sbin/iptables -A INPUT --match multiport -p tcp --dports 80,443 -j ACCEPT /sbin/iptables -A INPUT --match multiport -p udp --dports 80,443 -j ACCEPT #/sbin/iptables -A INPUT -j LOG /sbin/iptables -A INPUT -j DROP
Miscellaneous#
- set timezone on containers, put Europe/Amsterdam to /etc/timezone and run dpkg-reconfigure --frontend noninteractive tzdata.
- zabbix MySQL support, adjust /usr/local/etc/zabbix_agentd.conf.d/userparameter_mysql.conf and create ~zabbix/.my.cnf with user/pw in it
lxc-rsync#
To be able to quickly "copy/clone" lxc's (while having their own filesystem/lv already) :
root@apollo:~/bin# df -h Filesystem Size Used Avail Use% Mounted on /dev/sda7 9.2G 5.3G 3.5G 61% / udev 971M 12K 971M 1% /dev tmpfs 389M 408K 389M 1% /run none 5.0M 0 5.0M 0% /run/lock none 972M 0 972M 0% /run/shm cgroup 972M 0 972M 0% /sys/fs/cgroup /dev/mapper/vg0-lvol.cn1 20G 7.4G 12G 40% /var/lib/lxc/cn1 /dev/mapper/vg0-lvol.cn4 5.0G 2.0G 2.7G 43% /var/lib/lxc/cn4 /dev/mapper/vg0-lvol.cn2 20G 6.7G 13G 36% /var/lib/lxc/cn2 /dev/mapper/vg0-lvol.cn3 3.0G 69M 2.8G 3% /var/lib/lxc/cn3
I created the following ~root/bin/lxc-rsync script :
#!/bin/bash
#
# rsync on lxc with another
# args: <src lxc> <tgt lxc>
#
NUMARGS=$#
if [ $NUMARGS -ne 2 ]; then
echo "Usage: lxc-rsync <src lxc> <tgt lxc>"
exit 8
fi
SRCLXC=$1
TGTLXC=$2
SRCDIR=/var/lib/lxc/${SRCLXC}/rootfs
TGTDIR=/var/lib/lxc/${TGTLXC}/rootfs
if [ -d $SRCDIR -a -d $TGTDIR ]; then
echo "rsyncing from $SRCLXC to $TGTLXC"
cd $SRCDIR || exit 8
# save the old IP address
OLDIP=`grep address ${TGTDIR}/etc/network/interfaces | awk '{ print $NF}'`
rsync --exclude "tmp" --exclude "dev" --exclude "media" --exclude "mnt" --exclude "proc" --exclude "sys" --exclude "var/run" --verbose --recursive --links --perms --acls --times --owner --group --one-file-system --delete . $TGTDIR
# patching hostname and IP address
echo "patching /etc/hostname, /etc/hosts and /etc/network/interfaces ==> $TGTLXC / $OLDIP"
sed --in-place s/${SRCLXC}/${TGTLXC}/g ${TGTDIR}/etc/hostname
sed --in-place s/${SRCLXC}/${TGTLXC}/g ${TGTDIR}/etc/hosts
WRONGIP=`grep address ${TGTDIR}/etc/network/interfaces | awk '{ print $NF}'`
sed --in-place s/${WRONGIP}/${OLDIP}/g ${TGTDIR}/etc/network/interfaces
else
echo "either $SRCDIR or $TGTDIR does not exist"
exit 8
fi
lxc-copy#
The following script (takes longer but) works better :
#!/bin/bash
#
# copy an lxc (filesystem) to another one
# args: <src lxc> (must bu either cn1 or cn4, they will get copied to resp. cn2 and cn3)
#
# funtions first
logDie()
{
msg=$1
echo "$msg"
exit 8
}
# m a i n l i n e
#
NUMARGS=$#
if [ $NUMARGS -ne 1 ]; then
echo "Usage: lxc-copy <src lxc> (must bu either cn1 or cn4, they will get copied to resp. cn2 and cn3)"
exit 8
fi
SRCLXC=$1
if [ $SRCLXC != "cn1" -a $SRCLXC != "cn4" ]; then
echo "argument must be either cn1 or cn4"
exit 8
fi
TGTLXC=cn2
if [ $SRCLXC = "cn4" ]; then
TGTLXC=cn3
fi
echo "cloning from $SRCLXC to $TGTLXC"
mount |grep "/var/lib/lxc/${TGTLXC}" > /dev/null || logDie "/var/lib/lxc/${TGTLXC} is not mounted"
TGTDIR=/var/lib/lxc/${TGTLXC}/rootfs
OLDIP=`grep address ${TGTDIR}/etc/network/interfaces | awk '{ print $NF}'`
OLDUUID=`cat /etc/fstab|grep /${TGTLXC} | awk '{ print $1}'|awk -F= '{ print $NF}'`
# save old metadata of target lxc
cd /var/lib/lxc/${TGTLXC} && tar -cf /tmp/old-metadata-of-TGTLXC.tar config fstab rootfs.hold || logDie "saving old metadata of ${TGTLXC} failed"
cd -
MNTPOINT=/var/lib/lxc/${TGTLXC}
echo "umounting ${MNTPOINT}"
umount ${MNTPOINT} || logDie "umount failed for ${MNTPOINT}"
echo "dumping source filesystem"
TAPEFILE=/tmp/savedfs.fsa
fsarchiver -A savefs ${TAPEFILE} /dev/mapper/vg0-lvol.${SRCLXC} || logDie "fsarchive savefs failed"
echo "restoring filesystem"
fsarchiver restfs ${TAPEFILE} id=0,dest=/dev/mapper/vg0-lvol.${TGTLXC} || logDie "fsarchive restfs failed"
echo "restoring old UUID ${OLDUUID}"
tune2fs /dev/mapper/vg0-lvol.${TGTLXC} -U ${OLDUUID}
echo "mounting back again"
mount -a | logDie "mount -a failed"
echo "restoring old metadata"
cd /var/lib/lxc/${TGTLXC} && tar -xf /tmp/old-metadata-of-TGTLXC.tar || logDie "restoring old metadata failed"
echo "patching /etc/hostname, /etc/hosts and /etc/network/interfaces ==> $TGTLXC / $OLDIP"
sed --in-place s/${SRCLXC}/${TGTLXC}/g ${TGTDIR}/etc/hostname || logDie "patching /etc/hostname failed"
sed --in-place s/${SRCLXC}/${TGTLXC}/g ${TGTDIR}/etc/hosts || logDie "patching /etc/hosts failed"
WRONGIP=`grep address ${TGTDIR}/etc/network/interfaces | awk '{ print $NF}'`
sed --in-place s/${WRONGIP}/${OLDIP}/g ${TGTDIR}/etc/network/interfaces || logDie "patching /etc/network/interfaces failed"
rm -f ${TAPEFILE} /tmp/old-metadata-of-TGTLXC.tar
