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CentOS 6.5 - OpenVZ [message #51054]

Mon, 13 January 2014 04:59

hill3788
Messages: 6
Registered: January 2014
Location: USA

Junior Member

I installed OpenVZ on CentOS 6.5 32 bit and can't switch to container host. Any ideas?

[root@CentOS ~]# vzctl start 101
Container is already running
[root@CentOS ~]# vzctl enter 101
entered into CT 101
[root@CentOS /]#

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Re: CentOS 6.5 - OpenVZ [message #51055 is a reply to message #51054]

Mon, 13 January 2014 05:39

curx
Messages: 739
Registered: February 2006
Location: Nürnberg, Germany

Senior Member

Hi,

please check /proc/vz/veinfo, each line presents a running Container, format <CT_ID> <CT_class> <number_of_processes> <IP_address_of_venet>

Inside Container , you should only see the container id

101 ... ... ....

if there're more entries like ctid is 0 (0 is your host or hardwarenode), you are at your hostnode.

check on your hostnode

# cat /proc/vz/veinfo
# vzctl exec 101 'cat /proc/vz/veinfo'

or

# vzctl enter 101
_CT_ID # cat /proc/vz/veinfo

Bye Thorsten

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Re: CentOS 6.5 - OpenVZ [message #51056 is a reply to message #51055]

Mon, 13 January 2014 08:13

hill3788
Messages: 6
Registered: January 2014
Location: USA

Junior Member

This is what I see:

101 2 20 72.191.141.85 192.168.0.77

This is all new to me - What should the IP addresses be?

Do I need a DNS Server?

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Re: CentOS 6.5 - OpenVZ [message #51060 is a reply to message #51056]

Tue, 14 January 2014 14:15

Ales
Messages: 330
Registered: May 2009

Senior Member

hill3788 wrote on Mon, 13 January 2014 09:13

This is what I see:

101 2 20 72.191.141.85 192.168.0.77

This means you've entered your VM successfully. The prompt didn't change because you most likely use the same hostname for the HN and the VM, thus causing the confusion.

Quote:

This is all new to me - What should the IP addresses be?

Do I need a DNS Server?

IPs you see are the ones assigned to your VM. If you have internet connectivity then you most likely have DNS properly set up, as far as resolving goes.

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Re: CentOS 6.5 - OpenVZ [message #51062 is a reply to message #51054]

Wed, 15 January 2014 02:58

hill3788
Messages: 6
Registered: January 2014
Location: USA

Junior Member

I was able to switch to the container, but I can't install anything. For example I tried to install VIM on CT101 and I got an error. Maybe my ethernet card is not configured to work with the container.

[root@server101 /]# yum install vim
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
Could not retrieve mirrorlist http: // mirrorlist. centos. org/?release=6&arch=i386&repo=os error was
14: PYCURL ERROR 6 - "Couldn't resolve host 'mirrorlist.centos.org'"
Error: Cannot find a valid baseurl for repo: base

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Re: CentOS 6.5 - OpenVZ [message #51063 is a reply to message #51054]

Wed, 15 January 2014 13:20

Ales
Messages: 330
Registered: May 2009

Senior Member

You'll have to tell us a bit more about your network if you want help.

For example:
- how many IPs are available for your hardware node (HN)
- did you add just one public IP to your HN's network card and leave others unattached?
- post the output of 'cat /etc/resolv.conf' on your HN and from within your container (CT)
- is the public IP attached to your CT the correct one?

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Re: CentOS 6.5 - OpenVZ [message #51076 is a reply to message #51063]

Sat, 18 January 2014 23:24

hill3788
Messages: 6
Registered: January 2014
Location: USA

Junior Member

The setup is simple. I just installed OpenVZ on CentOS 6.5. There is no network - Just a computer connected to a cable modem. I assigned the container an IP of 192.168.0.101. I'm not sure what to use for the nameserver.

---

I have internet connectivity outside the container with:

eth0
vnet0

---

I can enter the container: [root@server101 /]#

---

resolv.conf:

# Generated by NetworkManager
domain stx.rr.com
search stx.rr.com
nameserver 209.18.47.61
nameserver 209.18.47.62

---

When I try to install something simple like VIM it fails:

[root@server101 /]# yum install vim
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
Could not retrieve mirrorlist http: // mirrorlist . centos. org/?release=6&arch=i386&repo=os error was
14: PYCURL ERROR 6 - "Couldn't resolve host 'mirrorlist.centos.org'"
Error: Cannot find a valid baseurl for repo: base
[root@server101 /]#

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Re: CentOS 6.5 - OpenVZ [message #51077 is a reply to message #51054]

Sun, 19 January 2014 03:16

hill3788
Messages: 6
Registered: January 2014
Location: USA

Junior Member

The data from resolve.conf from within the container is:

nameserver 169.254.0.0/16

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Re: CentOS 6.5 - OpenVZ [message #51078 is a reply to message #51054]

Sun, 19 January 2014 23:45

dipps
Messages: 22
Registered: May 2013
Location: Out in the scrub

Junior Member

You do have to provide a working nameserver. That 169.254 one isn't going to work.

Do updates work on the HN? Then have a look in its /etc/resolv.conf to find a working nameserver IP. Otherwise, ask your cable provider. If that resolv.conf you showed is on the HN, then 209.18.47.61 is a possibility.

Once you have a nameserver, change it like this on the HN. (Don't edit resolv.conf on the container, that's not permanent.)

HN# vzctl set 101 --nameserver MY.NAME.SERVER.IP --save

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Re: CentOS 6.5 - OpenVZ [message #51080 is a reply to message #51078]

Thu, 23 January 2014 01:36

hill3788
Messages: 6
Registered: January 2014
Location: USA

Junior Member

No, that did not help. Updates work just fine when I'm outside the container. Does this have anything to do with the NIC it's trying to use? I'm not sure this container even has access to the internet since I can't even ping an IP address.

I restarted the container and I got this:

Container is mounted
Adding IP address(es): 192.168.2.1 192.168.0.101
Setting CPU units: 1000
Configure veth devices: veth101.0
Container start in progress...

192.168.2.1 appears to be an APACHE test page.

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