Technical musings

lxd and external access

The version of lxd on Ubuntu 16.04 LTS is a little anemic with regards to explaining how to set up networking. I would assume that in many cases it is desirable for the container to be able to receive network requests. By default lxd configures a NAT bridge which means the container can go out, but without some work can't receive messages in.

Install bridge-utils

apt install bridge-utils

Modify /etc/network/interfaces and add

auto br0
iface br0 inet dhcp
  bridge_ports eno1

iface eno1 inet manual

Restart networking on host

service networking restart

Update default profile in lxc

lxc profile edit default

devices:
  eth0:
    name: eth0
    nictype: bridged
    parent: br0
    type: nic

Restart any existing containers
Assuming you have DHCP configured on the interface containing the bridge, your containers will now get DHCP addresses.

lxc list
+-------------------+---------+------------------+------+------------+-----------+
|       NAME        |  STATE  |       IPV4       | IPV6 |    TYPE    | SNAPSHOTS |
+-------------------+---------+------------------+------+------------+-----------+
| ultimate-cardinal | RUNNING | 10.0.0.85 (eth0) |      | PERSISTENT | 0         |
+-------------------+---------+------------------+------+------------+-----------+

Other articles

Bind mounts from inside LXD
Published: Fri 10 February 2017
By Jody Stephens

In build.

tags: lxd

Definitions:
- host the server running lxd.
- container the thing running inside of lxd.
- uid the user id.
Discussion

lxd defaults to running non-privileged containers. By utilizing linux namespaces this permits the container to run a process such that from that processes point of view it is uid 0 (nee' root …
read more
Creating vSphere VMs from .ova files on the linux command line

Published: Tue 10 January 2017
By Jody Stephens

In build.

tags: vmware esxi vsphere ovftool

VMware's documentation is great, but their naming is absolutely awful. Trying to find your way through the maze of acronyms and names is truly daunting. Take heart!

Uploading a OVA and creating a VM

Install OVFtool

Download ovftool from VMware, https://www.vmware.com/support/developer/ovf/ and install. I …
read more
Building CentOS RPM packages without Python Setuptools

Published: Fri 06 January 2017
By Jody Stephens

In build.

tags: rpm python centos

There are some compelling reasons to use setuptools with python: it is used by pypi and it manages building C extensions (or cython and the ilk). However, if you are in a position of integrating python scripts in polyglot environment setuptools has some compelling disadvantages: its dependency resolution is terrible …
read more
Building CentOS RPM packages with Python Setuptools
Published: Fri 12 August 2016
By Jody Stephens

In build.

tags: rpm python centos

Python 2/3 and CentOS

If you are using setuptools for python 2/3, you have the ability to make a python package and then have it make a RPM package if you are on CentOS.

First, you need a basic python package.
```
# basic-project/setup.py
from setuptools import setup …
```
read more

Other articles

Discussion

Uploading a OVA and creating a VM

Install OVFtool

Python 2/3 and CentOS

social