Hi all!
I have Debian 11 host and Oracle 8 LXC container
root@d11:/boot# uname -ar
Linux d11.localdomain 5.10.0-19-amd64 #1 SMP Debian 5.10.149-2 (2022-10-21) x86_64 GNU/Linux
with LXC 4
mvg@d11:~$ apt list -i| grep lxc
liblxc1/stable,now 1:4.0.6-2+deb11u1 amd64 [installed,automatic]
lxc-templates/stable,now 3.0.4-5 amd64 [installed,automatic]
lxc/stable,now 1:4.0.6-2+deb11u1 amd64 [installed]
lxcfs/stable,now 4.0.7-1 amd64 [installed,automatic]
and dnsmask-base
mvg@d11:~$ apt list -i | grep dnsmasq
dnsmasq-base/stable,now 2.85-1 amd64 [installed,automatic]
with setting for host
mvg@d11:~$ cat /etc/hosts
127.0.0.1 localhost
::1 localhost ip6-localhost ip6-loopback
ff02::1 ip6-allnodes
ff02::2 ip6-allrouters
192.168.1.15 d11.localdomain d11
mvg@d11:~$ cat /etc/hostname
d11.localdomain
and next container setting
[root@ol8-19c mvg]# cat /etc/hosts
127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4
::1 localhost localhost.localdomain localhost6 localhost6.localdomain6
10.0.3.15 ol8-19c.localdomain ol8-19c
[root@ol8-19c mvg]# cat /etc/hostname
ol8-19c.localdomain
When I ping from container to host by host IP all work fine
[root@ol8-19c mvg]# ping -c3 192.168.1.15
PING 192.168.1.15 (192.168.1.15) 56(84) bytes of data.
64 bytes from 192.168.1.15: icmp_seq=1 ttl=64 time=0.118 ms
64 bytes from 192.168.1.15: icmp_seq=2 ttl=64 time=0.072 ms
64 bytes from 192.168.1.15: icmp_seq=3 ttl=64 time=0.071 ms
but when I ping from container to host ping dropped
[root@ol8-19c mvg]# ping -c3 d11.localdomain d11
PING d11.localdomain (192.168.1.15) 56(124) bytes of data.
^C
--- d11.localdomain ping statistics ---
3 packets transmitted, 0 received, 100% packet loss, time 2043ms
Seems things I see when I ping container from host by IP and hostname
mvg@d11:~$ ping -c3 10.0.3.15
PING 10.0.3.15 (10.0.3.15) 56(84) bytes of data.
64 bytes from 10.0.3.15: icmp_seq=1 ttl=64 time=0.075 ms
64 bytes from 10.0.3.15: icmp_seq=2 ttl=64 time=0.058 ms
64 bytes from 10.0.3.15: icmp_seq=3 ttl=64 time=0.063 ms
mvg@d11:~$ ping ol8-19c.localdomain
ping: ol8-19c.localdomain: Name or service not known
Where and which files I must edit for correct names resolving between host and container?
Internet show a lot of information that does not match each other, I want to solve this problem by standard packages without installing additional packages.
Best Regards,
Vadim Maklakov.