Arch Linux - Docker Node - Network Breakdown

Let's examine the docker VM from the container to the proxmox host perspective.

1) Pihole Container - 192.168.55.10

[root@docker0 ~]# docker exec -ti pihole bash
root@pihole:/# ip -c l
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN mode DEFAULT group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
11: eth0@if4: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP mode DEFAULT group default 
    link/ether 02:42:c0:a8:37:0a brd ff:ff:ff:ff:ff:ff link-netnsid 0

Pihole Container - 192.168.55.10

root@pihole:/# ip -c addr
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
    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
11: eth0@if4: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default 
    link/ether 02:42:c0:a8:37:0a brd ff:ff:ff:ff:ff:ff link-netnsid 0
    inet 192.168.55.10/24 brd 192.168.55.255 scope global eth0
       valid_lft forever preferred_lft forever

Pihole Container - 192.168.55.10

2) Docker0 - 192.168.45.5

[root@docker0 ~]# ip -c l
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN mode DEFAULT group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
2: ens18: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP mode DEFAULT group default qlen 1000
    link/ether 5a:a4:8c:e9:00:83 brd ff:ff:ff:ff:ff:ff
    altname enp0s18
3: docker0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN mode DEFAULT group default 
    link/ether 02:42:32:86:1d:e8 brd ff:ff:ff:ff:ff:ff
4: ens18.55@ens18: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP mode DEFAULT group default 
    link/ether 5a:a4:8c:e9:00:83 brd ff:ff:ff:ff:ff:ff

Docker0 - 192.168.45.5

[root@docker0 ~]# ip -c addr
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
    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: ens18: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000
    link/ether 5a:a4:8c:e9:00:83 brd ff:ff:ff:ff:ff:ff
    altname enp0s18
    inet 192.168.45.5/24 brd 192.168.45.255 scope global ens18
       valid_lft forever preferred_lft forever
    inet6 fe80::58a4:8cff:fee9:83/64 scope link 
       valid_lft forever preferred_lft forever
3: docker0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN group default 
    link/ether 02:42:32:86:1d:e8 brd ff:ff:ff:ff:ff:ff
    inet 172.17.0.1/16 brd 172.17.255.255 scope global docker0
       valid_lft forever preferred_lft forever
    inet6 fe80::42:32ff:fe86:1de8/64 scope link 
       valid_lft forever preferred_lft forever
4: ens18.55@ens18: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default 
    link/ether 5a:a4:8c:e9:00:83 brd ff:ff:ff:ff:ff:ff
    inet6 fe80::58a4:8cff:fee9:83/64 scope link 
       valid_lft forever preferred_lft forever

Docker0 - 192.168.45.5

3) HV2 - Bridge VLAN - 192.168.1.101

hv2-ssh@hv2:~$ bridge v s
port    vlan ids
enp4s0f0         15 PVID Egress Untagged

vmbr0   None
veth1    2 PVID Egress Untagged

team2    2
         15
         25
         35
         45
         55
         201

tap101i0         2
         15
         25
         35
         45
         55
         201

tap100i0         45 PVID Egress Untagged

tap103i1         45 PVID Egress Untagged

tap105i0         45 PVID Egress Untagged

tap106i0         45 PVID Egress Untagged

tap104i0         45 PVID Egress Untagged
         55

HV2 - 192.168.1.101