From 9c147e8341e287366790e60658f646cdcc59bef2 Mon Sep 17 00:00:00 2001 From: James Falcon Date: Thu, 7 Oct 2021 11:27:36 -0500 Subject: Allow disabling of network activation (SC-307) (#1048) In #919 (81299de), we refactored some of the code used to bring up networks across distros. Previously, the call to bring up network interfaces during 'init' stage unintentionally resulted in a no-op such that network interfaces were NEVER brought up by cloud-init, even if new network interfaces were found after crawling the metadata. The code was altered to bring up these discovered network interfaces. On ubuntu, this results in a 'netplan apply' call during 'init' stage for any ubuntu-based distro on a datasource that has a NETWORK dependency. On GCE, this additional 'netplan apply' conflicts with the google-guest-agent service, resulting in an instance that can no be connected to. This commit adds a 'disable_network_activation' option that can be enabled in /etc/cloud.cfg to disable the activation of network interfaces in 'init' stage. LP: #1938299 --- doc/rtd/topics/network-config.rst | 11 +++++++++++ 1 file changed, 11 insertions(+) (limited to 'doc') diff --git a/doc/rtd/topics/network-config.rst b/doc/rtd/topics/network-config.rst index 8eb7a31b..494b687a 100644 --- a/doc/rtd/topics/network-config.rst +++ b/doc/rtd/topics/network-config.rst @@ -75,6 +75,17 @@ If `Cloud-init`_ 's networking config has not been disabled, and no other network information is found, then it will proceed to generate a fallback networking configuration. +Disabling Network Activation +---------------------------- + +Some datasources may not be initialized until after network has been brought +up. In this case, cloud-init will attempt to bring up the interfaces specified +by the datasource metadata. + +This behavior can be disabled in the cloud-init configuration dictionary, +merged from ``/etc/cloud/cloud.cfg`` and ``/etc/cloud/cloud.cfg.d/*``:: + + disable_network_activation: true Fallback Network Configuration ============================== -- cgit v1.2.3