The code that generates the invalid /run/net-enp0s3.conf belongs in the
Ubuntu isc-dhcp package, and specifically in debian/initramfs-
tools/lib/etc/dhcp/dhclient-enter-hooks.d/config.
It got in effect in 18.10 when initramfs-tools in Ubuntu switched to
calling dhclient instead of ipconfig.
Additionally, dhclient-script calls `chmod --reference=/etc/resolv.conf
$new_resolv_conf`, but busybox chmod doesn't support the --reference
parameter.
I.e. dhclient has numerous issues that need to be fixed, otherwise the
ipconfig => dhclient change should be reverted...
Thank you.
** Also affects: isc-dhcp (Ubuntu)
Importance: Undecided
Status: New
** Description changed:
- While netbooting, in initramfs-tools/scripts/functions, netplan for some
- reason tries to overwrite /run/net-enp0s3.conf that is initially and
- correctly generated by ipconfig.
-
- There, it writes unquoted values like the following, which are a shell syntax
error:
+ Since 18.10, Ubuntu switched to using dhclient instead of ipconfig in
initramfs configure_networking(). And now a malformed /run/net-enp0s3.conf is
generated, with unquoted values like the following, which are a shell syntax
error:
IPV4DNS0=1.2.3.1 1.2.3.2 1.2.3.3
- Then, initramfs-tools/init tries to source that in various places, and
produces the following message a lot of times:
+ This file is sourced by initramfs-tools/init in various places, and produces
the following message a lot of times:
/init: /run/net-enp0s3.conf: line 8: 1.2.3.2: not found
I.e. values should be quoted, and 2 DNS entries should go in
IPV4DNS0/IPV4DNS1, not multiple unquoted ones in IPV4DNS0.
- Here is the erroneous file that netplan produces:
+ Here is the erroneous file that dhclient-enter-hooks.d/config produces:
DEVICE=enp0s3
PROTO=dhcp
IPV4PROTO=dhcp
IPV4ADDR=10.161.254.38
IPV4NETMASK=255.255.255.0
IPV4BROADCAST=10.161.254.255
IPV4GATEWAY=10.161.254.1
IPV4DNS0=194.63.237.4 194.63.239.164 194.63.238.4
ROOTSERVER=10.161.254.1
HOSTNAME=
DNSDOMAIN=
- Here is the correct one that ipconfig initially produces, before getting
overwritten:
+ Here is the correct one that ipconfig produces:
DEVICE='enp0s3'
PROTO='dhcp'
IPV4ADDR='10.161.254.38'
IPV4BROADCAST='10.161.254.255'
IPV4NETMASK='255.255.255.0'
IPV4GATEWAY='10.161.254.1'
IPV4DNS0='194.63.237.4'
IPV4DNS1='194.63.239.164'
HOSTNAME=''
DNSDOMAIN=''
NISDOMAIN=''
ROOTSERVER='10.161.254.1'
ROOTPATH=''
filename=''
UPTIME='594'
DHCPLEASETIME='25200'
DOMAINSEARCH=''
- Thank you.
+ I.e. please either fix dhclient-enter-hooks.d/config, or revert the
+ ipconfig => dhclient change.
** Summary changed:
- netplan initramfs code writes invalid net-eth0.conf
+ dhclient initramfs code writes invalid net-eth0.conf
--
You received this bug notification because you are a member of Ubuntu
Touch seeded packages, which is subscribed to initramfs-tools in Ubuntu.
https://bugs.launchpad.net/bugs/1840965
Title:
dhclient initramfs code writes invalid net-eth0.conf
Status in netplan:
New
Status in initramfs-tools package in Ubuntu:
New
Status in isc-dhcp package in Ubuntu:
New
Bug description:
Since 18.10, Ubuntu switched to using dhclient instead of ipconfig in
initramfs configure_networking(). And now a malformed /run/net-enp0s3.conf is
generated, with unquoted values like the following, which are a shell syntax
error:
IPV4DNS0=1.2.3.1 1.2.3.2 1.2.3.3
This file is sourced by initramfs-tools/init in various places, and produces
the following message a lot of times:
/init: /run/net-enp0s3.conf: line 8: 1.2.3.2: not found
I.e. values should be quoted, and 2 DNS entries should go in
IPV4DNS0/IPV4DNS1, not multiple unquoted ones in IPV4DNS0.
Here is the erroneous file that dhclient-enter-hooks.d/config produces:
DEVICE=enp0s3
PROTO=dhcp
IPV4PROTO=dhcp
IPV4ADDR=10.161.254.38
IPV4NETMASK=255.255.255.0
IPV4BROADCAST=10.161.254.255
IPV4GATEWAY=10.161.254.1
IPV4DNS0=194.63.237.4 194.63.239.164 194.63.238.4
ROOTSERVER=10.161.254.1
HOSTNAME=
DNSDOMAIN=
Here is the correct one that ipconfig produces:
DEVICE='enp0s3'
PROTO='dhcp'
IPV4ADDR='10.161.254.38'
IPV4BROADCAST='10.161.254.255'
IPV4NETMASK='255.255.255.0'
IPV4GATEWAY='10.161.254.1'
IPV4DNS0='194.63.237.4'
IPV4DNS1='194.63.239.164'
HOSTNAME=''
DNSDOMAIN=''
NISDOMAIN=''
ROOTSERVER='10.161.254.1'
ROOTPATH=''
filename=''
UPTIME='594'
DHCPLEASETIME='25200'
DOMAINSEARCH=''
I.e. please either fix dhclient-enter-hooks.d/config, or revert the
ipconfig => dhclient change.
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https://bugs.launchpad.net/netplan/+bug/1840965/+subscriptions
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