Questions tagged [lxc]
LXC short for (Linux Containers) LXC is an operating system-level virtualization method for running multiple isolated Linux systems (containers) on a single control host. LXC is the userspace control package for Linux Containers, a lightweight virtual system mechanism sometimes described as “chroot on steroids”.
100
questions
0
votes
1
answer
630
views
How to disable lxc container login prompt on centos 7
I have created an LXC container on CentOS 7. Every time I do sudo lxc-start -n mycontainer I'm greeted with a login prompt:
...
[ OK ] Started Console Getty.
[ OK ] Started Command Scheduler.
[ ...
- 749
-3
votes
1
answer
648
views
Empty passphrase created ssh key-pair refusing empty passphrase when authenticating [closed]
After @Sarke help I reach that solution:
Here the fixed version, the original broken version cant help nobody.
About why I need to be able to SSH from one container to the other it that i need ...
- 1
0
votes
1
answer
55
views
LXC: how this network works?
I don't understand why I can ping between 10.0.3.* and 192.168.1.* if are in different subnets.
I search for it but I don't find any that clarifies it to me.
I would appreciate any help, docs, ...
5
votes
2
answers
3k
views
htop memory usage does not add up with process list
I am using lxd to run multiple containers and having trouble reporting the memory usage: both htop and free shows high memory usage but the list of processes that uses memory is very short and doesn't ...
- 71
4
votes
1
answer
2k
views
How to create a linux container which inherits the hosts root file system, possibly with zfs?
What
Hopefully the question in the title makes sense. I am wanting to create a low overhead (therefore no virtual machine) copy of the host operating system, with it running in a linux container.
I ...
- 722
0
votes
1
answer
1k
views
PREROUTING to LXC container with iptables
I've set up two containers with lxd, one with haproxy, pointing to the other with nginx.
I want my server's incoming traffic on port 80 to go to the container with haproxy. This is the rule I've ...
- 11
2
votes
1
answer
766
views
Running containers on top of QEMU
I have a testing setup I'm trying to migrate to using VMs rather than bare metal as much as possible. The existing setup is structured to run everything within containers (LXC, specifically), and it ...
- 193
0
votes
1
answer
5k
views
Internet access from LXC containers in proxmox 5.1 on VirtualBox
I've installed a Proxmox VE 5.1 on a VirtualBox in macOS (10.12).
The guess OS, Debian Strech (Proxmox is built on debian), has 2 "physical" network interfaces (configured from VirtualBox), Host-Only ...
- 109
1
vote
1
answer
291
views
Is there a way to redirect traffic to another port in the event that the service listening to the original port is unresponsive?
This is a rather specific question, but it is one I haven't been able to find an answer to. I'm running a set of services on an LXC container in Ubuntu 16.04 LTS, specifically game servers. However, ...
- 11
0
votes
1
answer
1k
views
Accessing LXC root User
I am new to containers and am trying figure them out.
I cannot figure out how to log in as root user on the container. I cannot get it to accept the temporary password or to change the password.
(...
- 31
0
votes
1
answer
288
views
Prevent LXC container from remounting host file system
Recently, I started looking at LXC as a virtualization platform. I have already created a container, and set it up to use via libvirt.
This works so far, but when I shut down the container, /var/lib/...
- 136
0
votes
1
answer
164
views
Tee causes format problems at console when running lxc-attach commands in session
I use tee to capture output of an install script to a file in the usual way. All is fine except when there lxc-attach commands executing in an LXC Linux container. For example (see attached ...
- 1
0
votes
1
answer
2k
views
How to ssh from one lxc container to another?
I'm trying to experiment with a small virtual cluster of machines to learn hadoop. I'm using LXD for this purpose. I've installed ssh servers on each vm and now need to connect from one vm to another. ...
- 172
4
votes
3
answers
9k
views
Copy files from LXC to host machine
I'm new to containers. I have a LXC container running on a remote linux machine. All I found online is how to copy files from host to LXC container. But how can I copy files from a running LXC ...
- 539
0
votes
1
answer
909
views
LXD container on GlusterFS
I'm trying to add a container created with LXC (v2.0) into a GlusterFS (v3.12) mount. So I tried to mount /var/lib/lxd/containers prior to creating the container, obviously I got the error message ...
- 111
0
votes
2
answers
2k
views
Unable to SSH to LXC Ubuntu container
I'm trying to connect from a CentOS host to my LXC Ubuntu container and it fails with this error:
packet_write_wait: Connection to 192.168.122.92 port 22: Broken pipe
The CentOS I'm using is:
...
- 101
0
votes
0
answers
837
views
LXC: Linux devices don't work within container
With Debian lenny I am desperately trying to get LXC working (Debian kernel 3.16 and LXC 1). One big issue is the use of device nodes. I use lxc.autodev and lxc.cgroup.devices.allow and my config ...
- 589
1
vote
1
answer
686
views
existing filesystem error on adding old btrfs storage volume into new ubuntu lxd install
lxc storage create default btrfs source=/dev/sdc
error: Failed to create the BTRFS pool: /dev/sdc appears to contain an existing filesystem (btrfs).
ERROR: use the -f option to force overwrite of /dev/...
- 11
2
votes
0
answers
206
views
Group containers in LXC
It's possible to group lxc containers in some kind of hierarchical folder structure?
I means set a group_containers folder in /var/lib/lxc in such a way you could have
/var/lib/lxc/container_1
/var/...
- 21
2
votes
2
answers
5k
views
Forcing Ping to Egress When Destination Interface is Local (Debian)
I am running a Debian-based Linux container under Proxmox 4.4. This host has five network interfaces (though only two come into play in the problem I'm having).
While I am shelled into this host, I ...
- 1,049
1
vote
1
answer
163
views
Multiple instances of an application on the same X server?
I'd like to run multiple instances of firefox in lxc containers, using ssh X forwarding:
ssh -X container-IP
firefox
It works perfectly if this copy of firefox is the only one.
If I previously start ...
user529185
2
votes
1
answer
2k
views
Resolving names of LXC containers on the host
On Ubuntu 16.04 server edition, after launching an LXC container, it can only be referred to by its IP address. Enabling the .lxc domain in dnsmasq doesn't seem to help, and tutorials available only ...
0
votes
2
answers
1k
views
How to make cmake find installed packages
I am trying to use cmake to compile a program and it needs to use lxc, I run the cmakelist with cmake .. and it returns -- checking for module 'lxc' -- package 'lxc' not found. However, if I run apt-...
- 135
4
votes
1
answer
6k
views
How to run openvpn in a LXC container inside debian host?
I am running debian stretch on my host and I try to configure openvpn inside an Ubuntu xenial LXC guest.
Because openvpn needs a tun device, I followed guides such as
http://heider.io/blog/2013/10/26/...
- 91
1
vote
1
answer
794
views
How to set up networking for lxc containers in OpenStack?
I am working on a setup of OpenStack using LXC containers for virtualization. I can launch instances (at least the instance log reports so). However, I can neither ping them nor connect to them via ...
- 111
1
vote
0
answers
485
views
Cannot run C++ webservice (using libhttpserver) as systemd service, everything works correctly when running from terminal (as same user)
This is my systemd unit file (almost identical is used to run Meteor webservice and it simply works):
[Unit]
Description=SomeService
[Service]
ExecStart=/opt/myapp/app
WorkingDirectory=/opt/myapp
[...
0
votes
0
answers
654
views
Bridge needs IP on host when bridging lxc containers?
I have the following setup.
Bridge on host machine called br0. No IP address set.
LXC container called router, which is attached to local network and br0, its task to route between the two.
LXC ...
4
votes
3
answers
3k
views
Unable to do 'yum install' inside LXC container on CentOS 7
I am trying to create CentOS container inside CentOS 7 and host my application. But I am unable to install anything inside container.
If I do
'yum -y install nodejs' i got below error
Loaded ...
- 41
0
votes
0
answers
455
views
Difference between an LXD Ubuntu container, and a Docker container with an Ubuntu image?
I think this question was already asked here, and this question was referenced, but it doesn't really answer. So I'll try to ask more in detail.
Let's say I have an LXD container running an instance ...
- 181
2
votes
2
answers
1k
views
mock build fails with "sh: /usr/bin/python2: No such file or directory" even though file exists
I'm trying to install tornado using mock, from the source rpm, in a Centos 7 lxc container:
mock -r epel-7-x86_64 python-tornado-4.4.2-3.fc26.src.rpm
Everything seems to go well until it stops with ...
- 749