Tag Archives: OpenVZ

Convert OpenVZ to LXC

Convert OpenVZ VM to LXC VM


Install same version lxc OS

lxc launch ubuntu:20.04 lxc-server

lxc stop lxc-server
rm -rf  /var/snap/lxd/common/lxd/storage-pools/default/containers/lxc-server/rootfs

mkdir /var/snap/lxd/common/lxd/storage-pools/default/containers/lxc-server/rootfs
On Ubuntu 20.04 OpenVZ VM run:

rsync -avz -e ssh --exclude=etc/inittab --exclude=etc/network/interfaces --exclude=dev/ --exclude=sys/ --exclude=proc/ / [email protected]:/var/snap/lxd/common/lxd/storage-pools/default/containers/lxc-server/rootfs/
vim /var/snap/lxd/common/lxd/storage-pools/default/containers/lxc-server/rootfs/etc/network/interfaces

auto lo

iface lo inet loopback

source /etc/network/interfaces.d/*.cfg
mkdir /var/snap/lxd/common/lxd/storage-pools/default/containers/lxc-server/rootfs/etc/network/interfaces.d/

vim /var/snap/lxd/common/lxd/storage-pools/default/containers/lxc-server/rootfs/etc/network/interfaces.d/eth0.cfg

# The primary network interface

auto eth0

iface eth0 inet dhcp
lxc start lxc-server

For sure you need to stop MySQL/PostgreSQL before rsync or if huge database you can resync database after syncing data from OpenVZ server

Failed to migrate the CT: Failed to migrate the Container. An internal error occurred when performing the operation. Try to migrate the Container again. If the problem persists, contact the Virtuozzo support team for assistance.

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vzmigrate can’t connect to destination node
On destination: yum install vzmigrate

Failed to register the CT: PRL_ERR_VZCTL_OPERATION_FAIL

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Failed to register the CT: PRL_ERR_VZCTL_OPERATION_FAILED (Details: Creating OS template cache for centos-8-x86_64 template
Can’t open /proc/sys/kernel/virt_osrelease: No such file or directory
Error: /usr/share/vzyum/bin/yum failed, exitcode=1
VE_PRIVATE is not set
Creation of Container private area failed

Make sure you are using vz7 kernel:
uname -a | grep vz7
Linux CentOS-78-64-minimal 3.10.0-1127.8.2.vz7.151.14 #1 SMP Tue Jun 9 12:58:54 MSK 2020 x86_64 x86_64 x86_64 GNU/Linux

/var/run/sshd missing after reboot openvz

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Missing privilege separation directory: /var/run/sshd error
If you are updating SSH, please make sure /usr/lib/tmpfiles.d/sshd.conf have: d /run/sshd 0755 root root

converting CentOS 7 to VZ7

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centos install virtuozzoyum install epel-release wget https://download.openvz.org/virtuozzo/releases/openvz-7.0.14-136/x86_64/os/Packages/p/python-subprocess32-3.2.7-1.vz7.5.x86_64.rpm wget https://download.openvz.org/virtuozzo/releases/openvz-7.0.14-136/x86_64/os/Packages/o/openvz-release-7.0.14-3.vz7.x86_64.rpm yum localinstall openvz-release-7.0.14-3.vz7.x86_64.rpm python-subprocess32-3.2.7-1.vz7.5.x86_64.rpm


wget http://repo.virtuozzo.com/vzlinux/7/x86_64/os/Packages/r/readykernel-scan-0.11-1.vl7.noarch.rpm

wget http://repo.virtuozzo.com/vzlinux/7/x86_64/os/Packages/z/zstd-1.4.4-1.vl7.x86_64.rpm

wget http://repo.virtuozzo.com/vzlinux/7/x86_64/os/Packages/v/vzlinux-release-7-1.vl7.90.x86_64.rpm
 mv /etc/yum.repos.d/CentOS-* /root/
rpm -e --nodeps --justdb json-c

yum erase jansson

wget http://repo.virtuozzo.com/vzlinux/7.8/x86_64/os/Packages/j/jansson-2.10-1.vl7.1.x86_64.rpm

wget http://repo.virtuozzo.com/vzlinux/7.8/x86_64/os/Packages/j/json-c-0.11-13.vl7.1.x86_64.rpm
yum localinstall jansson-2.10-1.vl7.1.x86_64.rpm

yum localinstall json-c-0.11-13.vl7.1.x86_64.rpm

yum install prlctl prl-disp-service vzkernel *ploop*

yum update
awk -F\' '$1=="menuentry " {print i++ " : " $2}' /etc/grub2.cfg

0 : Virtuozzo (3.10.0-1127.18.2.el7.x86_64) 7.0.14

1 : Virtuozzo (3.10.0-1127.8.2.vz7.151.14) 7.0.14

2 : Virtuozzo (3.10.0-1127.8.2.el7.x86_64) 7.0.14

3 : Virtuozzo (0-rescue-9063ac396d784f4c997ceacdd0590c25) 7.0.14
grub2-set-default 1

grub2-mkconfig -o /boot/grub2/grub.cfg

reboot

#OVZ templates yum install *ez.noarch

openvz stop service in group of nodes

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for i in `prlctl list | awk '$5 ~ /database_servers*/ {print $5}'`; do prlctl exec $i service firewalld stop; done

Restarting network (via systemctl): Job for network.service canceled

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service network restart
Restarting network (via systemctl): Job for network.service canceled.
[FAILED]

systemctl restart network
Job for network.service canceled.

If cyberpanel server network is down (venet0: mtu 1500 qdisc noop state DOWN) after server reboot, make sure:

vi /etc/fstab
#/usr/.tempdisk /tmp ext4 loop,rw,noexec,nosuid,nodev,nofail 0 0
#/tmp /var/tmp none bind 0 0

service network restart
Restarting network (via systemctl):
[ OK ]

Error: unsupported deleted submount: (deleted)/dev/log

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Setting up checkpoint…
set CPU flags..
suspend…
Can not suspend container: Invalid argument
Error: unsupported deleted submount: (deleted)/dev/log
Checkpointing failed
Error in run_cmd (pcopy.c:334): Command date ‘+%s.%N’ > /tmp/tmp.sJn0B2zf0e; vzctl –skiplock chkpnt 31581 –suspend –flags 161183 1>&2 failed with code 16
Error: ploop copy -s /dev/ploop45973 failed
Error: Failed to copy top ploop delta
Killed by signal 15.

To find issue:
grep /dev/log /proc/*/mountinfo 2>/dev/null
/proc/20518/mountinfo:259 239 0:85 /log /dev/log rw,nosuid,relatime shared:161 – devtmpfs devtmpfs rw,size=1792000k,nr_inodes=448000,mode=755

lsof -p 20518
COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME
mysqld 30264 mysql cwd DIR 182,735569 4096 5768267 /var/lib/mysq

Too many open files in system openvz

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id: cannot find name for user ID 0
-bash: cannot make pipe for command substitution: Too many open files in system
-bash: /etc/profile.d/less.sh: Too many open files in system
-bash: /etc/profile.d/mc.sh: Too many open files in system
-bash: /etc/profile.d/vim.sh: Too many open files in system
-bash: /etc/profile.d/which-2.sh: Too many open files in system
-bash: /root/.bash_profile: Too many open files in system
-bash-3.2# logout
-bash: /root/.bash_logout: Too many open files in system
-bash: /etc/bash.bash_logout: Too many open files in system
exited from CT XXXX

Fast fix:
vzctl restart XXXX

Error in e2fsck (fsutils.c:288): e2fsck failed (exit code 4)

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vzctl mount XXXX
Opening delta /vz/private/XXXX/root.hdd/root.hdd
Adding delta dev=/dev/ploopXXXX img=/vz/private/XXXX/root.hdd/root.hdd (rw)

/dev/ploop15649p1: UNEXPECTED INCONSISTENCY; RUN fsck MANUALLY.
(i.e., without -a or -p options)
Error in e2fsck (fsutils.c:288): e2fsck failed (exit code 4)

Failed to mount image: Error in e2fsck (fsutils.c:288): e2fsck failed (exit code 4)
[41]

ploop check -F /vz/private/CID/root.hdd/root.hdd
ploop mount /vz/private/CID/root.hdd/DiskDescriptor.xml
fdisk -l /dev/ploopXXXXX
e2fsck -y /dev/ploopXXXX

ploop umount /vz/private/XXXX/root.hdd/DiskDescriptor.xm

openvz find process by container id

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ps ax | awk '{print $1}' | xargs vzpid | grep CTID

openvz vzctl enter save bash history

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This also helps detect login/access on your OpenVZ from node echo "HISTFILE=~/.bash_history" >> /root/.bashrc

Error: Package: kmod-kvdo vdo ( Requires: kernel dm_put_device)

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Error: Package: kmod-kvdo-6.1.0.181-17.el7_5.x86_64 (updates) Requires: kernel(dm_unregister_target) = 0x35ba4186 Installed: kernel-3.10.0-862.el7.x86_64 (@anaconda) kernel(dm_unregister_target) = 0x62b8c739 Installed: vzkernel-3.10.0-862.9.1.vz7.63.3.x86_64 (@openvz-os) kernel(dm_unregister_target) = 0x97f3d3e0 Available: kernel-debug-3.10.0-862.el7.x86_64 (base) kernel(dm_unregister_target) = 0x9fea9142 Available: kernel-debug-3.10.0-862.2.3.el7.x86_64 (updates) kernel(dm_unregister_target) = 0x9fea9142 Available: kernel-debug-3.10.0-862.3.2.el7.x86_64 (updates) kernel(dm_unregister_target) = 0x9fea9142 Available: kernel-debug-3.10.0-862.3.3.el7.x86_64 (updates) kernel(dm_unregister_target) = 0x9fea9142 Available: kernel-debug-3.10.0-862.6.3.el7.x86_64 (updates) kernel(dm_unregister_target) = 0xe573fa0d Available: kernel-debug-3.10.0-862.9.1.el7.x86_64 (updates) kernel(dm_unregister_target) = 0xe573fa0d Available: kernel-debug-3.10.0-862.11.6.el7.x86_64 (updates) kernel(dm_unregister_target) = 0xe573fa0d Available: vzkernel-debug-3.10.0-862.9.1.vz7.63.3.x86_64 (openvz-os) kernel(dm_unregister_target) = 0x854b76de You could try using --skip-broken to work around the problem You could try running: rpm -Va --nofiles --nodigest


Fix:

yum --disablerepo=* --enablerepo=base install vdo kmod-kvdo

centos 7 openvz

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yum install epel*release
yum install prlctl prl-disp-service vzkernel
reboot
systemctl status vz

Error in ploop_check (check.c:574): Dirty flag is set

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If container will not start automatically:

ploop check -F /vz/private/CTID/root.hdd/root.hdd
ploop mount /vz/private/CTID/root.hdd/root.hdd/DiskDescriptor.xml

fsck /dev/ploop11111p1
vzctl start CTID

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I am Vitalijus Ryzakovas. This is my LINUX/UNIX blog.

Tag Archives: OpenVZ

Convert OpenVZ to LXC

Failed to migrate the CT: Failed to migrate the Container. An internal error occurred when performing the operation. Try to migrate the Container again. If the problem persists, contact the Virtuozzo support team for assistance.

Failed to register the CT: PRL_ERR_VZCTL_OPERATION_FAIL

/var/run/sshd missing after reboot openvz

converting CentOS 7 to VZ7

openvz stop service in group of nodes

Restarting network (via systemctl): Job for network.service canceled

Error: unsupported deleted submount: (deleted)/dev/log

Too many open files in system openvz

Error in e2fsck (fsutils.c:288): e2fsck failed (exit code 4)

openvz find process by container id

openvz vzctl enter save bash history

Error: Package: kmod-kvdo vdo ( Requires: kernel dm_put_device)

centos 7 openvz

Error in ploop_check (check.c:574): Dirty flag is set