The LXC tag is for questions relating to LinuX Containers and lightweight virtualization capabiliaties, issues, and troubleshooting.

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Autopilot Openstack Ceph reporting “HEALTH_WARN”

This is a brand new deployment, the warning shows in Nagios as soon as openstack has finished bootstrapping through landscape. Initially I thought ceph "HEALTH_WARN" was related to invalid DNS, as ...
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21 views

Configure the LXC/LXD network bridge after uppgrading from 15.10 to 16.04

The upgrade to 16.04 breaks the LXC/LXD network bridge configuration used in 15.10. What changes do I need to make to get the new setup working? I want the guest to be on the same network as the ...
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8 views

How to set up X11 forwarding in byobu inside a LXC container

I currently SSH into a LXC container running in a Ubuntu host machine. I have managed to set up X11 forwarding from the container to my local machine but when I start byobu (inside the container) the ...
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6 views

lxc - p2p1 does not come back after lxc-stop

I can start the container, connect to it, networking works, etc. Everything looks ok. But when I stop the container and try to restart it, p2p1 is no more available and restarting fails. When I ...
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16 views

Openstack LXC containers missing DNS

In my newly deployed openstack environment, I noticed that CEPH was failing within the 3 LXC containers. 016-05-03 02:18:38 INFO juju-log Unknown hook update-status - skipping. Reading package ...
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36 views

Running Ubuntu Desktop in LXC/LXD on top of Ubuntu Server

Is it possible to have Ubuntu Desktop running in an LXC/LXD container on top of Ubuntu Server, displaying Ubuntu Desktop's X session on the screen? Whether it makes sense or not, my idea is to ...
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11 views

What is the difference between LXCs and LXDs?

Which one to use in a distributed application where security and modularity is key.
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91 views

lxc nvidia error: xf86EnableIOPorts: failed to set IOPL for I/O (Operation not permitted)

In the process of trying to have lxc container (host 16.04, lxc 14.04) share nvidia I run into this error when starting X in the container: startx -- vt8 I get the following error: ...
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1answer
63 views

How to use lxc profile set?

I would like to edit LXD profiles from the command line. This is done by lxc profile set: lxc profile get <profile> <key> Get profile configuration. lxc profile ...
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0answers
148 views

Unity 8 lxc stucks after login. Unity 8 mir black screen without sursor

I installed Unity 8 mir and unity 8 lxc on Ubuntu 16.04, When log to unity 8 mir, a black screen displayed (without cursor). When log to Unity 8 lxc, It stucks at the loin screen (LightDM). Then I ...
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1answer
70 views

unable to use nvidia graphics in lxc container after upgrade to ubuntu 16.04

I have upgraded my system from 15.10 to 16.04 and the container from 14.04 to 16.04. I have used the default cuda/nvidia driver in both. cuda 7.5 and nvidia 361.42 When I start the container I get ...
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8 views

How to use a video device in a lxd container?

I would like to use the host video device (/dev/video0 for instance) in a lxd container. There is information about how to configure devices in lxd but it only mentions char and block devices (which ...
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50 views

Moving LXD containers to clean install of 16.04

I have a load (~14) of LXD containers running on my 14.04 development machine. I would like to do a clean install of 16.04 but I need to keep my containers. What is the best approach to achieve ...
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1answer
43 views

Why using (or not) dedicated bridges with LXD?

Question: Are there specific drawbacks of using a single bridge, as opposed to a dedicated one per container? Details: I have a host which runs a few LXD containers. I initially decided to have one ...
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17 views

LXD duplicates root subuid and subgid entries

I have had LXC installed and have a number of unprivileged containers running as root. To achieve this, I created entries in /etc/subuid and /etc/subgid for root, as follows: root:200000:65536 ...
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100 views

Issue starting LXD containers

I am running Ubuntu 15.10 and kernel Linux odroid 3.10.96-82. My hardware is an ODROID-XU4 ARM based SBC with the Exynos5244 CPU. I am having an issue getting LXD containers to start on this system ...
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256 views

Unity 8 - Stuck at login screen

i recently installed Ubuntu Xenial in order to install Unity 8 and test how it work with my graphic card (Intel HD 3000). First I updated the system and then installed U8: sudo apt install unity8-lxc ...
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13 views

lxcbr0 stop container communication

I'm creating LXC containers to be used by different users but required each container to connect to lxcbr0 to provide remote access. How can I restrict with LXC that containers on a default bridge ...
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29 views

LXC unprivileged container: apt-get fails to download anything inside

I'm running Ubuntu Xenial and set up simple unprivileged user container from template (also Xenial). When I attach inside and try to just do upgrade or install anything 'apt-get' fails with following ...
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1answer
113 views

LXD 2.0 Local Networking

Today I apt-get upgraded my machine (14.04) and now I can no longer access any of my local LXD containers. There was a message warning that I needed to reconfigure the container networking but now I ...
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2answers
37 views

How to import LXC containers from a previously used ZFS lxc zpool?

I'm using all default lxc settings with ZFS as the backstore. Which means, I have an lxc zpool and created containers with lxc-create -B zfs -n ubuntu-base -t ubuntu Now, the root fs ran out of ...
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29 views

how to save lxc.conf after editing?

Trying to get safe browsing with lxc by guide from here https://www.stgraber.org/2014/02/09/lxc-1-0-gui-in-containers/ and stucked. I type in terminal sudo gedit /var/log/lxd/u1/lxc.conf editing, ...
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26 views

TCP session establish problem

I have multiple quagga instance running in lxc doing some kind of network simulation. BGP-protocol run fine between quagga containers. But when connecting quagga to Cisco ios, TCP-session which is ...
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1answer
36 views

Disk usage for the same drive shows 20K in the host and 16G in the container

When comparing the disk usage for a mounted harddrive the usage is completely different when compared between the host and the container. I am running Ubuntu 14.04 on the host and in the lxc ...
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1answer
65 views

Building LXC, LXD Image

Is it possible when using LXC,LXD images and containers that I can build my OWN image for a specific Ubuntu distro? then I use it as a container. thanks
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12 views

LXD LXC containers Ubuntu 10.04

Regarding the use of the LXC and LXD is their an Ubuntu 10.04 container that is possible to use ? if not is their a method to build Ubuntu 10.04 container ? Thanks
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2answers
62 views

How to check is an LXD container runs unprivileged?

I am configuring my LXD containers to run unpriviledged as root. How can I check that they indeed run as such? Is it enough that ps -ef on the host shows that all processes running in containers ...
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48 views

Where to configure lxd containers?

I installed LXD and created a few containers and while reading about various configurations (specifically about how to run unprivileged containers as root), I saw that the configuration files ...
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1answer
41 views

Juju on Maas, Lxc container not deploying

I have the latest juju deployed on maas. I also deployed the gui with: juju deploy juju-gui --to 0 This seem to work fine. But when I deploy an lxc container on that machine the conatiner stays in ...
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17 views

Vagrant not shutting down gracefully when shutting down computer

I am working with vagrant 1.7.4, which i use together with lxc 1.1.5 on ubuntu 15.10. I was working with it the last few weeks and never did vagrant halt before shutting down my computer. Now it ...
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57 views

Where is the configuration file of a lxc container?

I installed lxd to use linux containers. For some reason I keep using lxc commands to install and start my containers. Since lxd seems to be close to lxc maybe there is a reason for that (but it is ...
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2answers
81 views

LXD,LXC containers security

I just want to know dose the Linux containers (LXD) provide security? Such that if on container get infected with a virus will that effect the entire system (kernel+other containers) Or it will ...
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27 views

Using aufs inside a lxc container

I'm not able to use aufs inside an unprivileged lxc container. Both host and container OS match (ubuntu-wily-amd64). A simple test on host mounts fine. All directories have are 777 for purposes of ...
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1answer
89 views

What images can you store in lxd containers?

What kinds of images can you store in LXD containers ?
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1answer
46 views

LXD snappy add and run continer

I have to install and run Ubuntu Snappy on the Raspberry pi 2. and I have install the LXD container using the command: sudo snappy install lxd.stgraber now i want to start make containers and run ...
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1answer
112 views

lxd: error: remote images exists as <https://images.linuxcontainers.org:8443>

I am using Ubuntu 15.04 desktop version. I have installed lxd successfully on my machine. Unfortunately while trying to add remote images i get following error message. $ lxc remote add images ...
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6 views

nm.d already present while launching multiple lxc application containers. Not able to launch more than 1 container

I want to launch lxc application containers on ubuntu. Am able to launch one container with an application. As am trying to launch second container with same application its giving nm.d daemon already ...
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15 views

shell script opens lxc container as root and stops executing the following commands. How to overcome this?

shell scripts executes to root@container and ignores the flags following the lxc-execute command. How to execute commands directly inside the container using shell script?
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47 views

Mount ZFS dataset in unprivileged containers

First a bit of information about my configuration: Ubuntu 15.10 ZFS pool created LXC containers stored in pool/lxc Dataset created in pool/mydataset owned by user1 Now I need one of the containers ...
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22 views

lxc assign MAC adress after first creation

I found much information in this question. But after system reboots dnsmasq assigns randomly IP addresses ignoring entities inside file: /etc/lxc/dnsmasq-hosts.conf So I checked logs and gets this ...
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11 views

Host users in lxc container

I try to build dev environments with different set of libraries in each of containers. It essential for me to use the same users in host and container. Is there anyway to make container use users, ...
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0answers
45 views

lxc container not resolvable with IPv6

I set up a container on Ubuntu 14.04 trusty. The container also uses Ubuntu 14.04 trusty as template. The network is set up as bridged. My network interface from the hosts (eth0) is bound to the ...
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0answers
94 views

Automouting NFS share inside NAT'd LXC container fails

I have 2x Ubuntu 14.04 LXC setups One is on bare metal hardware and containers are assigned IP adresses directly from the network The other one is on an ESXi virtual machine and using NAT via the ...
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1answer
81 views

How do I set an LXC container to start on boot in 15.10?

15.10 uses the new db based config system. Getting this done requires adding a directive to the container's config using lxc config edit containernanme. Problem is I can't find the config docs (15.10 ...
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1answer
34 views

bridge and LXC container on two cloud server

I have problem with the configuration of bridge and lxc container on cloud server. I Have two cloud servers. On each cloud I've created bridge by brctl like: brctl addbr $bridge ip addr add ...
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1answer
82 views

Juju LXC Containers getting wrong DHCP?

I'm using a networking similar to this one: http://www.openstackbasement.com/maas-network-hardware When I run: juju deploy --to lxc:0 mysql juju deploy --to lxc:0 keystone etc... According to ...
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142 views

LXC USB Passthrough 2

Recently i managed to try LXC containers. I've installed Proxmox 4.1 as host and got 3 Ubuntu 14.04 containers. Everything seems to work fine but i cant get my USB Hasp keys passthrough. Each ...
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26 views

Is there a way for one Linux container to see other containers' network traffic?

I created three Linux containers with default configuration, started sending packets from one to the other, and tried sniffing the network from the third one by putting the nic in promiscuous mode and ...
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68 views

LXC multiple unprivileged containers UID & GID questions

I created multiple unprivileged LXC containers successfully. However they all have the same UID and GID as follow: ls -l /.local/share/lxc total 12 drwxrwx--- 3 100000 js 4096 Jan 21 20:20 ...
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113 views

Upgrade failed on lxc container

I was running an upgrade from 15.10 to xenial on an lxc container remotely, while it went offline. Restarted the container and seems to work fine, apache, mysql except it cannot be accessed via ssh ...