Alexandre Takacs
asked on
Basic Linux / Debian networking question
I have just provisioned a Debian 9 VM.
My /etc/network/interfaces file reads
I'm sure I am missing something obvious... but what??
My /etc/network/interfaces file reads
auto ens32
iface ens32 inet static
address 172.16.50.210
netmask 255.255.255.0
broadcast 172.16.50.254
network 172.16.50.0
gateway 172.16.50.254
Yet for some reason, I end up with the system having one DHCP address and the static one I'd like for the file above.I'm sure I am missing something obvious... but what??
ASKER
Thanks - good catche(s) - corrected.
But doesn't address my underlying issue - still end up with a multi-homed system (one IP via DHCP, one static)
But doesn't address my underlying issue - still end up with a multi-homed system (one IP via DHCP, one static)
Dual homed means there are 2 ethernet adapters...
Then 2 adapters descriptions are needed.
Is there a misspelling in the name?
What is the output from:
Then 2 adapters descriptions are needed.
Is there a misspelling in the name?
What is the output from:
ip addr show
ASKER
You are correct - multihomed ins not the word to use here.
Still
Still
bitnami@debian:~$ ip address show
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: ens32: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UNKNOWN group default qlen 1000
link/ether 00:0c:29:88:c7:ca brd ff:ff:ff:ff:ff:ff
inet 172.16.50.100/24 brd 172.16.50.255 scope global dynamic ens32
valid_lft 255623sec preferred_lft 255623sec
inet 172.16.50.210/24 brd 172.16.50.255 scope global secondary ens32
valid_lft forever preferred_lft forever
inet6 fe80::20c:29ff:fe88:c7ca/64 scope link
valid_lft forever preferred_lft forever
bitnami@debian:~$
Uninstall the DHCP service.
apt remove dhcp-client isc-dhcp-client isc-dhcp-common
If this fails to solve the issue, then look for one of the other DHCP clients being installed instead of the default dhcp-client or isc-dhcp-client.
Also note that if the system has not been rebooted since changing /etc/interfaces, those changes will not be applied until the next reboot.
apt remove dhcp-client isc-dhcp-client isc-dhcp-common
If this fails to solve the issue, then look for one of the other DHCP clients being installed instead of the default dhcp-client or isc-dhcp-client.
Also note that if the system has not been rebooted since changing /etc/interfaces, those changes will not be applied until the next reboot.
ASKER
Getting a bit crazy... I have removed dhcp client - rebooted - still two IP, one being apparently visa DHCP !!
Did the system actually uninstall anything when the Apt command was issued?
ASKER
> Did the system actually uninstall anything when the Apt command was issued?
Yes it did - as a matter of fact:
It is not anymore installed ... yet I still gat a DHCP IP !!
Yes it did - as a matter of fact:
bitnami@debian:~$ sudo apt remove dhcp-client isc-dhcp-client isc-dhcp-common Reading package lists... Done
Building dependency tree
Reading state information... Done
Virtual packages like 'dhcp-client' can't be removed
Package 'isc-dhcp-client' is not installed, so not removed
Package 'isc-dhcp-common' is not installed, so not removed
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
bitnami@debian:~$
It is not anymore installed ... yet I still gat a DHCP IP !!
No, it did not uninstall anything. There is still a DHCP client in the system.
I'll take a further look at this later on. I believe the problem is related to the recent "deprecation" of the old startup method, and replacement by the new one which is much harder to deal with.
I'll take a further look at this later on. I believe the problem is related to the recent "deprecation" of the old startup method, and replacement by the new one which is much harder to deal with.
ASKER
Well it certainly reported a desinstall the first time I ran the command.
Then the second time it reports that the client is not installed (my lattest trace).
But I agree there is still something getting a DHCP (I clearly see the lease request on the router side) address!
Then the second time it reports that the client is not installed (my lattest trace).
But I agree there is still something getting a DHCP (I clearly see the lease request on the router side) address!
There are more posibiities for dhcp clients.. dhclient f.e there used to be even more like pump, dhcpcd (i am not sure if NetworkManager has support by itself)
Can you also check the /etc/networking/interfaces .d directory if there is another definition of the interface there?
Can you also check the /etc/networking/interfaces
ASKER
/etc/networking/interfaces .d contains a file "setup" with following content
auto lo
iface lo inet loopback
auto eth0
iface eth0 inet dynamic
I have amended the last line to read asiface eth0 inet static
but still does results in the same result
No that one operates on the eth0 interface if there is none it won't affect ens32
Any chance of VM tooling doing anything?
can you provide a ps -axf output, to see what processes are active?
Any chance of VM tooling doing anything?
can you provide a ps -axf output, to see what processes are active?
ASKER
We are running ESX - I don't think there are any networking shenanigans there...
bitnami@debian:~$ ps -axf
PID TTY STAT TIME COMMAND
2 ? S 0:00 [kthreadd]
3 ? S 0:00 \_ [ksoftirqd/0]
4 ? S 0:00 \_ [kworker/0:0]
5 ? S< 0:00 \_ [kworker/0:0H]
7 ? S 0:00 \_ [rcu_sched]
8 ? S 0:00 \_ [rcu_bh]
9 ? S 0:00 \_ [migration/0]
10 ? S< 0:00 \_ [lru-add-drain]
11 ? S 0:00 \_ [watchdog/0]
12 ? S 0:00 \_ [cpuhp/0]
13 ? S 0:00 \_ [cpuhp/1]
14 ? S 0:00 \_ [watchdog/1]
15 ? S 0:00 \_ [migration/1]
16 ? S 0:00 \_ [ksoftirqd/1]
18 ? S< 0:00 \_ [kworker/1:0H]
19 ? S 0:00 \_ [cpuhp/2]
20 ? S 0:00 \_ [watchdog/2]
21 ? S 0:00 \_ [migration/2]
22 ? S 0:00 \_ [ksoftirqd/2]
24 ? S< 0:00 \_ [kworker/2:0H]
25 ? S 0:00 \_ [cpuhp/3]
26 ? S 0:00 \_ [watchdog/3]
27 ? S 0:00 \_ [migration/3]
28 ? S 0:00 \_ [ksoftirqd/3]
30 ? S< 0:00 \_ [kworker/3:0H]
31 ? S 0:00 \_ [kdevtmpfs]
32 ? S< 0:00 \_ [netns]
33 ? S 0:00 \_ [khungtaskd]
34 ? S 0:00 \_ [oom_reaper]
35 ? S< 0:00 \_ [writeback]
36 ? S 0:00 \_ [kcompactd0]
38 ? SN 0:00 \_ [ksmd]
39 ? SN 0:00 \_ [khugepaged]
40 ? S< 0:00 \_ [crypto]
41 ? S< 0:00 \_ [kintegrityd]
42 ? S< 0:00 \_ [bioset]
43 ? S< 0:00 \_ [kblockd]
44 ? S 0:00 \_ [kworker/1:1]
45 ? S< 0:00 \_ [devfreq_wq]
46 ? S< 0:00 \_ [watchdogd]
47 ? S 0:00 \_ [kswapd0]
48 ? S< 0:00 \_ [vmstat]
60 ? S< 0:00 \_ [kthrotld]
61 ? S 0:00 \_ [kworker/3:1]
62 ? S 0:00 \_ [kworker/2:1]
63 ? S< 0:00 \_ [ipv6_addrconf]
96 ? S< 0:00 \_ [bioset]
97 ? S< 0:00 \_ [bioset]
98 ? S< 0:00 \_ [bioset]
99 ? S< 0:00 \_ [bioset]
100 ? S< 0:00 \_ [bioset]
101 ? S< 0:00 \_ [bioset]
102 ? S< 0:00 \_ [bioset]
103 ? S< 0:00 \_ [bioset]
104 ? S 0:00 \_ [kworker/u8:1]
106 ? S< 0:00 \_ [ata_sff]
108 ? S< 0:00 \_ [mpt_poll_0]
109 ? S< 0:00 \_ [mpt/0]
136 ? S 0:00 \_ [scsi_eh_0]
137 ? S< 0:00 \_ [scsi_tmf_0]
138 ? S< 0:00 \_ [bioset]
139 ? S 0:00 \_ [scsi_eh_1]
141 ? S< 0:00 \_ [scsi_tmf_1]
142 ? S 0:00 \_ [scsi_eh_2]
143 ? S< 0:00 \_ [scsi_tmf_2]
145 ? S 0:00 \_ [kworker/u8:2]
161 ? S< 0:00 \_ [kworker/1:1H]
162 ? S< 0:00 \_ [kworker/0:1H]
163 ? S< 0:00 \_ [kworker/3:1H]
164 ? S< 0:00 \_ [kworker/2:1H]
181 ? S< 0:00 \_ [kworker/u9:0]
191 ? S 0:00 \_ [jbd2/sda1-8]
192 ? S< 0:00 \_ [ext4-rsv-conver]
219 ? S 0:00 \_ [kauditd]
229 ? S 0:00 \_ [kworker/1:2]
264 ? S 0:00 \_ [kworker/0:2]
283 ? S< 0:00 \_ [ttm_swap]
337 ? S< 0:00 \_ [edac-poller]
1848 ? S 0:00 \_ [kworker/3:0]
1850 ? S 0:00 \_ [kworker/2:0]
1 ? Ss 0:01 /sbin/init
217 ? Ss 0:00 /lib/systemd/systemd-journald
218 ? Ss 0:01 /usr/bin/vmtoolsd
243 ? Ss 0:00 /lib/systemd/systemd-udevd
254 ? Ss 0:00 /lib/systemd/systemd-networkd
276 ? Ssl 0:00 /lib/systemd/systemd-timesyncd
277 ? Ss 0:00 /usr/sbin/haveged --Foreground --verbose=1 -w 1024
317 ? Ssl 0:00 /usr/sbin/syslog-ng -F
318 ? Ss 0:00 /usr/sbin/irqbalance --foreground
319 ? Ss 0:00 /usr/sbin/atd -f
320 ? Ss 0:00 /usr/sbin/cron -f
322 ? Ss 0:00 /usr/bin/VGAuthService
446 ? Ss 0:00 /usr/sbin/sshd -D
1665 ? Ss 0:00 \_ sshd: bitnami [priv]
1673 ? S 0:00 \_ sshd: bitnami@pts/0
1674 pts/0 Ss 0:00 \_ -bash
1979 pts/0 R+ 0:00 \_ ps -axf
537 tty1 Ss+ 0:00 /sbin/agetty --noclear tty1 linux
545 tty2 Ss+ 0:00 /sbin/agetty --noclear tty2 linux
553 tty3 Ss+ 0:00 /sbin/agetty --noclear tty3 linux
561 tty4 Ss+ 0:00 /sbin/agetty --noclear tty4 linux
569 tty5 Ss+ 0:00 /sbin/agetty --noclear tty5 linux
577 tty6 Ss+ 0:00 /sbin/agetty --noclear tty6 linux
601 ? S 0:00 /bin/sh /opt/bitnami/mysql/bin/mysqld_safe --defaults
933 ? Sl 0:01 \_ /opt/bitnami/mysql/bin/mysqld.bin --defaults-file
961 ? Ss 0:00 /usr/bin/perl /usr/share/webmin/miniserv.pl /etc/webm
990 ? Ss 0:00 php-fpm: master process (/opt/bitnami/php/etc/php-fpm
991 ? S 0:02 \_ php-fpm: pool owncloud
992 ? S 0:01 \_ php-fpm: pool owncloud
1330 ? S 0:01 \_ php-fpm: pool owncloud
999 ? Ss 0:00 /opt/bitnami/apache2/bin/httpd.bin -f /opt/bitnami/ap
1004 ? Sl 0:00 \_ /opt/bitnami/apache2/bin/httpd.bin -f /opt/bitnam
1005 ? Sl 0:00 \_ /opt/bitnami/apache2/bin/httpd.bin -f /opt/bitnam
1006 ? Sl 0:00 \_ /opt/bitnami/apache2/bin/httpd.bin -f /opt/bitnam
1262 ? Sl 0:00 \_ /opt/bitnami/apache2/bin/httpd.bin -f /opt/bitnam
1409 ? Ssl 0:00 /usr/bin/gonit
bitnami@debian:~$
SOLUTION
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ASKER CERTIFIED SOLUTION
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ASKER
Ok I found a file 99-dhcp.network in /etc/systemd/network that reads
set DHCP to no
and finally no more DHCP !
[Match]
Name=en*
[Network]
DHCP=yes
set DHCP to no
and finally no more DHCP !
bitnami@debian:~$ ip address show
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: ens32: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UNKNOWN group default qlen 1000
link/ether 00:0c:29:88:c7:ca brd ff:ff:ff:ff:ff:ff
inet 172.16.50.210/24 brd 172.16.50.255 scope global ens32
valid_lft forever preferred_lft forever
inet6 fe80::20c:29ff:fe88:c7ca/64 scope link
valid_lft forever preferred_lft forever
wow - wasn't that trivial after all - somewhat reassured... :)
ASKER
thanks for your help - I think you both contributed equally here
NP., problem solved, that's important...
(last 4 into a 5)...
Or leave the line out, then it will be computed....
same for network, you can leave that out.