All indication in CI is that Centos Stream9's use of dhclient
appears to point to compatability issues when interacting with
dnsmasq. However, this doesn't appear to be the issue with the
internal dhcp client. As such, lets constraint the RH default
so that it no longer applies to Centos 9-stream.
I've also added a documentation entry for DIB_DHCP_CLIENT which
was previously undocumented.
As an aside, I've already reached out to RH's NetworkManager team
regarding this, but root cause is not entirely understood at this
point.
Change-Id: I235f75b385a8b0348c8fe064038c51409f8722c4
Story: 2010109
Task: 45677
NetworkManager is quite capable to do automatic
interface configuration. NetworkManager will by default
try to auto-configure any interface with no configuration.
It will use DHCP for IPv4 and Router Advertisements to
decide how to initialize IPv6.
It will most likely do it just as good, or better than the
dhcp-all-interfaces.sh script.
Since dhcp-all-interfaces clean out all ifcfg files in
60-remove-cloud-image-interfaces it means NetworkManager will
by default attempt auto configuration for all interfaces.
This change add's and environment variable:
DIB_DHCP_NETWORK_MANAGER_AUTO (default: false)
When DIB_DHCP_NETWORK_MANAGER_AUTO is set to `true` only the
NetworkManager config will be written. The dhcp-all-interfaces
service will not be installed. Hence dhcp-all-interfaces will
not write any config files, allowing NetworkManager to just do
it's thing.
Change-Id: Id6f8d6aaaf52a78175bb6c065ec88274c364834e
On initial boot when networking is brought up by cloud-init this
is the timeout that dhclient adheres to. Centos configures
"timeout 300" (for an EC2 bug) in their cloud image, which results
in a 5 minutes delay to boot in cases where no dhcp available (e.g. IPv6
SLAAC). To reduce this boot delay and to provide consistency with
places where we have set other dhcp timeouts set this to DIB_DHCP_TIMEOUT.
Change-Id: I119a002070501c3dfe7c6730b07ee25f422b85b0
Related-Bug: #1758324
In slow networks like Infiniband it takes much time for the
interface to get the carrier. This patch enables this service
to run more then 20 seconds and limited by DIB_DHCP_TIMEOUT.
Change-Id: I8a6015567ac25e37b5a5aba4b1fda71170cc144a
Currently we have all our elements and library files in a top-level
directory and install them into
<root>/share/diskimage-builder/[elements|lib] (where root is either /
or the root of a virtualenv).
The problem with this is that editable/development installs (pip -e)
do *not* install data_files. Thus we have no canonical location to
look for elements -- leading to the various odd things we do such as a
whole bunch of guessing at the top of disk-image-create and having a
special test-loader in tests/test_elements.py so we can run python
unit tests on those elements that have it.
data_files is really the wrong thing to use for what are essentially
assets of the program. data_files install works well for things like
config-files, init.d files or dropping documentation files.
By moving the elements under the diskimage_builder package, we always
know where they are relative to where we import from. In fact,
pkg_resources has an api for this which we wrap in the new
diskimage_builder/paths.py helper [1].
We use this helper to find the correct path in the couple of places we
need to find the base-elements dir, and for the paths to import the
library shell functions.
Elements such as svc-map and pkg-map include python unit-tests, which
we do not need tests/test_elements.py to special-case load any more.
They just get found automatically by the normal subunit loader.
I have a follow-on change (I69ca3d26fede0506a6353c077c69f735c8d84d28)
to move disk-image-create to a regular python entry-point.
Unfortunately, this has to move to work with setuptools. You'd think
a symlink under diskimage_builder/[elements|lib] would work, but it
doesn't.
[1] this API handles stuff like getting files out of .zip archive
modules, which we don't do. Essentially for us it's returning
__file__.
Change-Id: I5e3e3c97f385b1a4ff2031a161a55b231895df5b
2016-11-01 17:27:41 -07:00
Renamed from elements/dhcp-all-interfaces/README.rst (Browse further)
