Public bug reported: I'm using cloud-init on a Debian machien in AWS.
On these machiesn, ipv6 is disabled by setting /proc/sys/net/ipv6/conf/all/disable_ipv6 to 1. This causes the network to fail: bas@machine:/etc/network$ sudo ifup ens5 Internet Systems Consortium DHCP Client 4.4.1 Copyright 2004-2018 Internet Systems Consortium. All rights reserved. For info, please visit https://www.isc.org/software/dhcp/ Listening on LPF/ens5/02:45:ca:0d:93:76 Sending on LPF/ens5/02:45:ca:0d:93:76 Sending on Socket/fallback DHCPREQUEST for 10.0.16.20 on ens5 to 255.255.255.255 port 67 DHCPACK of 10.0.16.20 from 10.0.16.1 RTNETLINK answers: File exists bound to 10.0.16.20 -- renewal in 1796 seconds. Could not get a link-local address run-parts: /etc/network/if-pre-up.d/cloud_inet6 exited with return code 1 ifup: failed to bring up ens5 Even worse, on boot the machines do get a proper ipv4 address, but (apparently because setting up the network fails), the dhcp (v4) daemon is stopped, and the machines "mysteriously" drop off the net after the lease ends. 1. AWS with official Debian buster images (https://wiki.debian.org/Cloud/AmazonEC2Image/Buster) 2. bas@machine:~$ cat /etc/network/interfaces # Include files from /etc/network/interfaces.d: source-directory /etc/network/interfaces.d # Cloud images dynamically generate config fragments for newly # attached interfaces. See /etc/udev/rules.d/75-cloud-ifupdown.rules # and /etc/network/cloud-ifupdown-helper. Dynamically generated # configuration fragments are stored in /run: source-directory /run/network/interfaces.d bas@machine:~$ cat /run/network/interfaces.d/ens5 auto ens5 allow-hotplug ens5 iface ens5 inet dhcp iface ens5 inet6 manual try_dhcp 1 ** Affects: cloud-init Importance: Undecided Status: New ** Attachment added: "cloud-init.tar.gz" https://bugs.launchpad.net/bugs/1863773/+attachment/5329329/+files/cloud-init.tar.gz -- You received this bug notification because you are a member of Yahoo! Engineering Team, which is subscribed to cloud-init. https://bugs.launchpad.net/bugs/1863773 Title: cloud-init network fails if ipv6 is disabled Status in cloud-init: New Bug description: I'm using cloud-init on a Debian machien in AWS. On these machiesn, ipv6 is disabled by setting /proc/sys/net/ipv6/conf/all/disable_ipv6 to 1. This causes the network to fail: bas@machine:/etc/network$ sudo ifup ens5 Internet Systems Consortium DHCP Client 4.4.1 Copyright 2004-2018 Internet Systems Consortium. All rights reserved. For info, please visit https://www.isc.org/software/dhcp/ Listening on LPF/ens5/02:45:ca:0d:93:76 Sending on LPF/ens5/02:45:ca:0d:93:76 Sending on Socket/fallback DHCPREQUEST for 10.0.16.20 on ens5 to 255.255.255.255 port 67 DHCPACK of 10.0.16.20 from 10.0.16.1 RTNETLINK answers: File exists bound to 10.0.16.20 -- renewal in 1796 seconds. Could not get a link-local address run-parts: /etc/network/if-pre-up.d/cloud_inet6 exited with return code 1 ifup: failed to bring up ens5 Even worse, on boot the machines do get a proper ipv4 address, but (apparently because setting up the network fails), the dhcp (v4) daemon is stopped, and the machines "mysteriously" drop off the net after the lease ends. 1. AWS with official Debian buster images (https://wiki.debian.org/Cloud/AmazonEC2Image/Buster) 2. bas@machine:~$ cat /etc/network/interfaces # Include files from /etc/network/interfaces.d: source-directory /etc/network/interfaces.d # Cloud images dynamically generate config fragments for newly # attached interfaces. See /etc/udev/rules.d/75-cloud-ifupdown.rules # and /etc/network/cloud-ifupdown-helper. Dynamically generated # configuration fragments are stored in /run: source-directory /run/network/interfaces.d bas@machine:~$ cat /run/network/interfaces.d/ens5 auto ens5 allow-hotplug ens5 iface ens5 inet dhcp iface ens5 inet6 manual try_dhcp 1 To manage notifications about this bug go to: https://bugs.launchpad.net/cloud-init/+bug/1863773/+subscriptions -- Mailing list: https://launchpad.net/~yahoo-eng-team Post to : [email protected] Unsubscribe : https://launchpad.net/~yahoo-eng-team More help : https://help.launchpad.net/ListHelp
