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Hi there, I have also came across this issue in Amazon AWS with the official CentOS 7 image, but in my case the file to edit is /etc/sysconfig/network and must manually change to IPV6_AUTOCONF=yes I have also tried to simply add a script to /etc/cloud/cloud.cfg.d/99-net-ipv6.cfg #cloud-config network: version: 1 config: - type: physical name: eth0 subnets: - type: dhcp - type: dhcp6 just by adding the script mand rebooting it doesn't work. I had to go manually and edit /etc/sysconfig/network setting ipv6_autoconf to yes and has been persisting... |
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Meanwhile I just verified on cloud-init bug tracker the fix has been committed 1 hour ago... |
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@maverickws : myself have the issue that appeared in cloud-init from 7.7 it seems : Commit : https://git.centos.org/rpms/cloud-init/c/738010598bffd8b7f249b35fe0ed5020b442dfec?branch=c7 It patches upstream cloud-init like this : https://git.centos.org/rpms/cloud-init/blob/c7/f/SOURCES/0006-sysconfig-Don-t-write-BOOTPROTO-dhcp-for-ipv6-dhcp.patch#_26 Have you pointer to upstream cloud-init bug tracker ? we can then have a look as I see conflicting ideas in that .patch files. I can confirm that having the CentOS 7 AMI image deployed needs this to work fine : sed -i 's/IPV6_AUTOCONF=no/IPV6_AUTOCONF=yes/' /usr/lib/python2.7/site-packages/cloudinit/net/sysconfig.py And it works so after a reboot too (as cloud-init then puts IPV6_AUTOCONF=yes in /etc/sysconfig/network) The only "interesting" thing is that through autoconf/radvd, the centos ami gets a wrong /128 subnet, but router is reachable and connectivity works too |
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I can confirm that arrfabs fix works (t2 micro instance) |
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Confirm that this fix still works (and is still needed) on some CentOS images as most recent as 7.8 |
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The complete cloud-init configuration I'm having to use to properly get IPV6 routing working in 7.8: ``` #cloud-config network: version: 1 config: - type: physical name: eth0 subnets: - type: dhcp4 - type: dhcp6 bootcmd: - "sed -i 's/^IPV6_AUTOCONF=.*$/IPV6_AUTOCONF=yes/g' /etc/sysconfig/network-scripts/ifcfg-eth0 /etc/sysconfig/network" - systemctl restart network ``` |
- Anonymous
