Dedicated Server, use part of it for an OpenVZ Container

Cyph3r

Hello,

I have a dedicated server right now with the following specs:
CPU: Intel Xeon CPU E5420 @ 2.50GHz 8 cores,
RAM: 16GB,
HDD: 250GB SSD,
UP/DOWN: 1Gbps,
IPS: 5 IPV4

It is currently running Debian 8 Jessie but I would like to dedicate 1-3 of the IPS for OpenVZ containers.
Without completely wiping my whole system is there an easy way to install OpenVZ on top of Debian or do I need to install OpenVZ as the main OS on my dedicated and then go from there?

Jonchun

Use LXD instead if you dont want to wipe it all. OpenVZ requires Centos 6

jvnadr

As @Johchun said, try LXC. It is an excellent replacement for openvz. Install proxmox 4 on top of your debian 8. Then, you can handle easily containers with lxc or, even, kvm if you like, without this affecting what you currently have installed in your server (of course, anything you want to do to a working server, needs backups first, to don't cry later!)

PioHost

As mentioned above try out LXC my personal experience shows a much better performance than openVZ, I switched from oepnvz to LXC for all my production machines and have not looked back since

Cyph3r

I'm about to check out LXC now. Thank you for the suggestions! Much appreciated

ZEROF

With that server you can run proxmox and run KVM or LXC containers. You can add pfsense and run all on one or two public IP's and NAT other VM's or containers.

Cyph3r

I've installed and setup LXC and created a Debian 8 Jessie container but when I start it I get the following error which doesn't leave much detail as to why it wont start though:

`root@server:/# lxc-start -n debserv                                                                                                                                   
lxc-start: Error setting memory.limit_in_bytes to 3230M for debserv                                                                                                                                       
lxc-start: failed to setup the cgroup limits for 'debserv'                                                                                                                                                
lxc-start: failed to spawn 'debserv'                                                                                                                                                                      
lxc-start: The container failed to start.                                                                                                                                                               
lxc-start: Additional information can be obtained by setting the --logfile and --logpriority options.`  

And my config file looks like this:

lxc.network.type = veth lxc.rootfs = /var/lib/lxc/debserv/rootfs lxc.include = /usr/share/lxc/config/debian.common.conf lxc.mount = /var/lib/lxc/debserv/fstab lxc.utsname = debserv lxc.arch = amd64 lxc.autodev = 1 lxc.kmsg = 0 lxc.network.flags = up lxc.cgroup.memory.limit_in_bytes = 3230M lxc.cgroup.memory.memsw.limit_in_bytes = 3658M lxc.cgroup.cpuset.cpus = 0-3 lxc.cgroup.cpu.shares = 1024 lxc.network.link = virbr0 lxc.network.hwaddr = 00:1E:A2:A6:3E:3A lxc.network.ipv4 = 192.168.122.5/24

Jonchun

@Cyph3r try this:
https://github.com/lxc/lxc/issues/668

Cyph3r

@Jonchun said:
@Cyph3r try this:
https://github.com/lxc/lxc/issues/668

I'm a bit confused on how I use this variable...

Cyph3r

Nevermind I added

GRUB_CMDLINE_LINUX="cgroup_enable=memory swapaccount=1"

to my /etc/default/grub

Cyph3r

LXC is running and I've created containers of Debian but I can't ping outbound to anything...