LXC always does the same thing, it preconfigures your network namespace.
Now if the OS you're running in the container runs its own network
configuration tool, that pre-made configuration will likely get reset or
mangled.
If you want to use those config keys, you need to make sure you're not
running software in your container which will reset that pre-made
configuration.
** Changed in: lxc (Ubuntu)
Status: New => Invalid
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https://bugs.launchpad.net/bugs/1876475
Title:
lxc can't assign ipv4 address from lxc-container config file
Status in lxc package in Ubuntu:
Invalid
Bug description:
I created and ran lxc-container with network config - others lxc-config on
host system are the same like that (ipv4. addresses is different):
__________________________________________
# Template used to create this container: /usr/share/lxc/templates/lxc-ubuntu
# Parameters passed to the template:
# For additional config options, please look at lxc.container.conf(5)
# Uncomment the following line to support nesting containers:
#lxc.include = /usr/share/lxc/config/nesting.conf
# (Be aware this has security implications)
# Common configuration
lxc.include = /usr/share/lxc/config/ubuntu.common.conf
lxc.apparmor.profile = unconfined
lxc.start.auto = 1
# Container specific configuration
lxc.rootfs.path = dir:/var/lib/lxc/video/rootfs
lxc.uts.name = video
lxc.arch = amd64
# Network configuration
lxc.net.0.type = veth
lxc.net.0.flags = up
lxc.net.0.link = lxcbr0
lxc.net.0.hwaddr = 4a:49:43:49:79:bf
lxc.net.0.ipv4.address = 10.0.3.10/24
lxc.net.0.ipv4.gateway = 10.0.3.1
________________________________________________
When container started - i can't see ip 10.0.3.10, it is not assigned
after start:
NAME STATE AUTOSTART GROUPS IPV4 IPV6 UNPRIVILEGED
x RUNNING 1 - 10.0.3.2 - false
y RUNNING 1 - 10.0.3.3 - false
x1 RUNNING 1 - 10.0.3.7 - false
x2 RUNNING 1 - 10.0.3.5 - false
z3 RUNNING 1 - 10.0.3.4 - false
z1 RUNNING 1 - 10.0.3.6 - false
video RUNNING 0 - - - false <-----!!!
Example (inside container "z1"):
root@z1:/# lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 18.04.3 LTS
Release: 18.04
Codename: bionic
Example (inside problem container "video"):
root@video:/# lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 20.04 LTS
Release: 20.04
Codename: focal
x,y,x1-3,z3,z1 - ubuntu 18 lts
video - Ubuntu 20 LTS,
host system ubuntu 20 lts.
Host system:
root@node:/var/lib/lxc/video# lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 20.04 LTS
Release: 20.04
Codename: focal
BUT!
When I restarts all host-system, "video" container assigns ipv4 address after
it.
And if I stop the "video" container again (lxc-stop) and start the "video"
container again (lxc-start -d -n video) - it losts ipv4 address and can't
assign it again (from cli).
root@node:/home/alex# dpkg -l | grep lxc
ii liblxc-common 1:4.0.2-0ubuntu1
amd64 Linux Containers userspace tools (common tools)
ii liblxc1 1:4.0.2-0ubuntu1
amd64 Linux Containers userspace tools (library)
ii lxc 1:4.0.2-0ubuntu1
all Transitional package - lxc -> lxc-utils
ii lxc-templates 3.0.4-3ubuntu1
amd64 Linux Containers userspace tools (templates)
ii lxc-utils 1:4.0.2-0ubuntu1
amd64 Linux Containers userspace tools
rc lxctl 0.3.1+debian-4
all Utility to manage LXC
ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: lxc 1:4.0.2-0ubuntu1
ProcVersionSignature: Ubuntu 5.4.0-28.32-generic 5.4.30
Uname: Linux 5.4.0-28-generic x86_64
ApportVersion: 2.20.11-0ubuntu27
Architecture: amd64
CasperMD5CheckResult: skip
Date: Sat May 2 18:21:44 2020
PackageArchitecture: all
ProcEnviron:
SHELL=/bin/bash
LANG=en_US.UTF-8
TERM=xterm
XDG_RUNTIME_DIR=<set>
PATH=(custom, no user)
SourcePackage: lxc
UpgradeStatus: Upgraded to focal on 2020-05-02 (0 days ago)
defaults.conf:
lxc.net.0.type = veth
lxc.net.0.link = lxcbr0
lxc.net.0.flags = up
lxc.net.0.hwaddr = 00:16:3e:xx:xx:xx
lxc.conf: lxc.network.link = lxcbr0
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