I cannot resolve an issue with internet access from container. Can you help me please? I use lxd 4.3.
From my container:
# ping 8.8.8.8 - doesn't work
# ping <host ip> - works
tried with containers on CentOS 7 and Ubuntu 18, same issue. It’s interresting, that one of containers (where I added proxy device, and mapped user) I can access internet as non-root user. (though all containers use same default profile, and lxbr0).
Host os: Ubuntu 20.04
One of container’s internal IP - 10.0.200.133.
Commands on host:
lxc config show os1 --expanded
architecture: x86_64
config:
image.architecture: amd64
image.description: Centos 7 amd64 (20200703_07:08)
image.os: Centos
image.release: "7"
image.serial: "20200703_07:08"
image.type: squashfs
raw.idmap: both 1000 1000
volatile.base_image: ef84015078407f31c1db169344742b7062deb465189a5a3ec186e9d1e0cb4185
volatile.eth0.host_name: vetha95bafd5
volatile.eth0.hwaddr: 00:16:3e:af:11:df
volatile.idmap.base: "0"
volatile.idmap.current: '[{"Isuid":true,"Isgid":false,"Hostid":1000000,"Nsid":0,"Maprange":1000},{"Isuid":true,"Isgid":true,"Hostid":1000,"Nsid":1000,"Maprange":1},{"Isuid":true,"Isgid":false,"Hostid":1001001,"Nsid":1001,"Maprange":999998999},{"Isuid":false,"Isgid":true,"Hostid":1000000,"Nsid":0,"Maprange":1000},{"Isuid":true,"Isgid":true,"Hostid":1000,"Nsid":1000,"Maprange":1},{"Isuid":false,"Isgid":true,"Hostid":1001001,"Nsid":1001,"Maprange":999998999}]'
volatile.idmap.next: '[{"Isuid":true,"Isgid":false,"Hostid":1000000,"Nsid":0,"Maprange":1000},{"Isuid":true,"Isgid":true,"Hostid":1000,"Nsid":1000,"Maprange":1},{"Isuid":true,"Isgid":false,"Hostid":1001001,"Nsid":1001,"Maprange":999998999},{"Isuid":false,"Isgid":true,"Hostid":1000000,"Nsid":0,"Maprange":1000},{"Isuid":true,"Isgid":true,"Hostid":1000,"Nsid":1000,"Maprange":1},{"Isuid":false,"Isgid":true,"Hostid":1001001,"Nsid":1001,"Maprange":999998999}]'
volatile.last_state.idmap: '[{"Isuid":true,"Isgid":false,"Hostid":1000000,"Nsid":0,"Maprange":1000},{"Isuid":true,"Isgid":true,"Hostid":1000,"Nsid":1000,"Maprange":1},{"Isuid":true,"Isgid":false,"Hostid":1001001,"Nsid":1001,"Maprange":999998999},{"Isuid":false,"Isgid":true,"Hostid":1000000,"Nsid":0,"Maprange":1000},{"Isuid":true,"Isgid":true,"Hostid":1000,"Nsid":1000,"Maprange":1},{"Isuid":false,"Isgid":true,"Hostid":1001001,"Nsid":1001,"Maprange":999998999}]'
volatile.last_state.power: RUNNING
devices:
eth0:
name: eth0
network: lxdbr0
type: nic
root:
path: /
pool: default
type: disk
ephemeral: false
profiles:
- default
stateful: false
description: ""
lxc network info lxdbr0
Name: lxdbr0
MAC address: 3e:31:f9:8c:13:26
MTU: 1500
State: up
Ips:
inet 10.0.200.1
inet6 fe80::a4f1:adff:fe18:f67f
Network usage:
Bytes received: 7.93kB
Bytes sent: 45.28kB
Packets received: 94
Packets sent: 261
iptables -L -v -n -t nat
Chain PREROUTING (policy ACCEPT 311 packets, 34583 bytes)
pkts bytes target prot opt in out source destination
7 1549 DOCKER all -- * * 0.0.0.0/0 0.0.0.0/0 ADDRTYPE match dst-type LOCAL
Chain INPUT (policy ACCEPT 135 packets, 20414 bytes)
pkts bytes target prot opt in out source destination
Chain OUTPUT (policy ACCEPT 4543 packets, 829K bytes)
pkts bytes target prot opt in out source destination
0 0 DOCKER all -- * * 0.0.0.0/0 !127.0.0.0/8 ADDRTYPE match dst-type LOCAL
Chain POSTROUTING (policy ACCEPT 4501 packets, 821K bytes)
pkts bytes target prot opt in out source destination
0 0 MASQUERADE all -- * !docker0 172.17.0.0/16 0.0.0.0/0
0 0 MASQUERADE all -- * !br-42712dcc4910 172.18.0.0/24 0.0.0.0/0
0 0 MASQUERADE all -- * !br-3122fd0dcf95 172.19.0.0/16 0.0.0.0/0
0 0 MASQUERADE tcp -- * * 172.18.0.2 172.18.0.2 tcp dpt:80
Chain DOCKER (2 references)
pkts bytes target prot opt in out source destination
0 0 RETURN all -- docker0 * 0.0.0.0/0 0.0.0.0/0
0 0 RETURN all -- br-42712dcc4910 * 0.0.0.0/0 0.0.0.0/0
0 0 RETURN all -- br-3122fd0dcf95 * 0.0.0.0/0 0.0.0.0/0
0 0 DNAT tcp -- !br-42712dcc4910 * 0.0.0.0/0 0.0.0.0/0 tcp dpt:8088 to:172.18.0.2:80
iptables -L -v -n -t filter
Chain INPUT (policy ACCEPT 131K packets, 223M bytes)
pkts bytes target prot opt in out source destination
Chain FORWARD (policy DROP 25 packets, 2552 bytes)
pkts bytes target prot opt in out source destination
25 2552 DOCKER-USER all -- * * 0.0.0.0/0 0.0.0.0/0
25 2552 DOCKER-ISOLATION-STAGE-1 all -- * * 0.0.0.0/0 0.0.0.0/0
0 0 ACCEPT all -- * docker0 0.0.0.0/0 0.0.0.0/0 ctstate RELATED,ESTABLISHED
0 0 DOCKER all -- * docker0 0.0.0.0/0 0.0.0.0/0
0 0 ACCEPT all -- docker0 !docker0 0.0.0.0/0 0.0.0.0/0
0 0 ACCEPT all -- docker0 docker0 0.0.0.0/0 0.0.0.0/0
0 0 ACCEPT all -- * br-42712dcc4910 0.0.0.0/0 0.0.0.0/0 ctstate RELATED,ESTABLISHED
0 0 DOCKER all -- * br-42712dcc4910 0.0.0.0/0 0.0.0.0/0
0 0 ACCEPT all -- br-42712dcc4910 !br-42712dcc4910 0.0.0.0/0 0.0.0.0/0
0 0 ACCEPT all -- br-42712dcc4910 br-42712dcc4910 0.0.0.0/0 0.0.0.0/0
0 0 ACCEPT all -- * br-3122fd0dcf95 0.0.0.0/0 0.0.0.0/0 ctstate RELATED,ESTABLISHED
0 0 DOCKER all -- * br-3122fd0dcf95 0.0.0.0/0 0.0.0.0/0
0 0 ACCEPT all -- br-3122fd0dcf95 !br-3122fd0dcf95 0.0.0.0/0 0.0.0.0/0
0 0 ACCEPT all -- br-3122fd0dcf95 br-3122fd0dcf95 0.0.0.0/0 0.0.0.0/0
Chain OUTPUT (policy ACCEPT 96022 packets, 15M bytes)
pkts bytes target prot opt in out source destination
Chain DOCKER (3 references)
pkts bytes target prot opt in out source destination
0 0 ACCEPT tcp -- !br-42712dcc4910 br-42712dcc4910 0.0.0.0/0 172.18.0.2 tcp dpt:80
Chain DOCKER-ISOLATION-STAGE-1 (1 references)
pkts bytes target prot opt in out source destination
0 0 DOCKER-ISOLATION-STAGE-2 all -- docker0 !docker0 0.0.0.0/0 0.0.0.0/0
0 0 DOCKER-ISOLATION-STAGE-2 all -- br-42712dcc4910 !br-42712dcc4910 0.0.0.0/0 0.0.0.0/0
0 0 DOCKER-ISOLATION-STAGE-2 all -- br-3122fd0dcf95 !br-3122fd0dcf95 0.0.0.0/0 0.0.0.0/0
25 2552 RETURN all -- * * 0.0.0.0/0 0.0.0.0/0
Chain DOCKER-ISOLATION-STAGE-2 (3 references)
pkts bytes target prot opt in out source destination
0 0 DROP all -- * docker0 0.0.0.0/0 0.0.0.0/0
0 0 DROP all -- * br-42712dcc4910 0.0.0.0/0 0.0.0.0/0
0 0 DROP all -- * br-3122fd0dcf95 0.0.0.0/0 0.0.0.0/0
0 0 RETURN all -- * * 0.0.0.0/0 0.0.0.0/0
Chain DOCKER-USER (1 references)
pkts bytes target prot opt in out source destination
25 2552 RETURN all -- * * 0.0.0.0/0 0.0.0.0/0
iptables-legacy -L -v -n -t nat
Chain PREROUTING (policy ACCEPT 319 packets, 35429 bytes)
pkts bytes target prot opt in out source destination
8 1853 DOCKER all -- * * 0.0.0.0/0 0.0.0.0/0 ADDRTYPE match dst-type LOCAL
Chain INPUT (policy ACCEPT 139 packets, 21087 bytes)
pkts bytes target prot opt in out source destination
Chain OUTPUT (policy ACCEPT 4623 packets, 854K bytes)
pkts bytes target prot opt in out source destination
0 0 DOCKER all -- * * 0.0.0.0/0 !127.0.0.0/8 ADDRTYPE match dst-type LOCAL
Chain POSTROUTING (policy ACCEPT 4580 packets, 847K bytes)
pkts bytes target prot opt in out source destination
0 0 MASQUERADE all -- * !docker0 172.17.0.0/16 0.0.0.0/0
0 0 MASQUERADE all -- * !br-42712dcc4910 172.18.0.0/24 0.0.0.0/0
0 0 MASQUERADE all -- * !br-3122fd0dcf95 172.19.0.0/16 0.0.0.0/0
0 0 MASQUERADE tcp -- * * 172.18.0.2 172.18.0.2 tcp dpt:80
Chain DOCKER (2 references)
pkts bytes target prot opt in out source destination
0 0 RETURN all -- docker0 * 0.0.0.0/0 0.0.0.0/0
0 0 RETURN all -- br-42712dcc4910 * 0.0.0.0/0 0.0.0.0/0
0 0 RETURN all -- br-3122fd0dcf95 * 0.0.0.0/0 0.0.0.0/0
0 0 DNAT tcp -- !br-42712dcc4910 * 0.0.0.0/0 0.0.0.0/0 tcp dpt:8088 to:172.18.0.2:80
iptables-legacy -L -v -n -t filter
Chain INPUT (policy ACCEPT 131K packets, 223M bytes)
pkts bytes target prot opt in out source destination
Chain FORWARD (policy DROP 25 packets, 2552 bytes)
pkts bytes target prot opt in out source destination
25 2552 DOCKER-USER all -- * * 0.0.0.0/0 0.0.0.0/0
25 2552 DOCKER-ISOLATION-STAGE-1 all -- * * 0.0.0.0/0 0.0.0.0/0
0 0 ACCEPT all -- * docker0 0.0.0.0/0 0.0.0.0/0 ctstate RELATED,ESTABLISHED
0 0 DOCKER all -- * docker0 0.0.0.0/0 0.0.0.0/0
0 0 ACCEPT all -- docker0 !docker0 0.0.0.0/0 0.0.0.0/0
0 0 ACCEPT all -- docker0 docker0 0.0.0.0/0 0.0.0.0/0
0 0 ACCEPT all -- * br-42712dcc4910 0.0.0.0/0 0.0.0.0/0 ctstate RELATED,ESTABLISHED
0 0 DOCKER all -- * br-42712dcc4910 0.0.0.0/0 0.0.0.0/0
0 0 ACCEPT all -- br-42712dcc4910 !br-42712dcc4910 0.0.0.0/0 0.0.0.0/0
0 0 ACCEPT all -- br-42712dcc4910 br-42712dcc4910 0.0.0.0/0 0.0.0.0/0
0 0 ACCEPT all -- * br-3122fd0dcf95 0.0.0.0/0 0.0.0.0/0 ctstate RELATED,ESTABLISHED
0 0 DOCKER all -- * br-3122fd0dcf95 0.0.0.0/0 0.0.0.0/0
0 0 ACCEPT all -- br-3122fd0dcf95 !br-3122fd0dcf95 0.0.0.0/0 0.0.0.0/0
0 0 ACCEPT all -- br-3122fd0dcf95 br-3122fd0dcf95 0.0.0.0/0 0.0.0.0/0
Chain OUTPUT (policy ACCEPT 96652 packets, 15M bytes)
pkts bytes target prot opt in out source destination
Chain DOCKER (3 references)
pkts bytes target prot opt in out source destination
0 0 ACCEPT tcp -- !br-42712dcc4910 br-42712dcc4910 0.0.0.0/0 172.18.0.2 tcp dpt:80
Chain DOCKER-ISOLATION-STAGE-1 (1 references)
pkts bytes target prot opt in out source destination
0 0 DOCKER-ISOLATION-STAGE-2 all -- docker0 !docker0 0.0.0.0/0 0.0.0.0/0
0 0 DOCKER-ISOLATION-STAGE-2 all -- br-42712dcc4910 !br-42712dcc4910 0.0.0.0/0 0.0.0.0/0
0 0 DOCKER-ISOLATION-STAGE-2 all -- br-3122fd0dcf95 !br-3122fd0dcf95 0.0.0.0/0 0.0.0.0/0
25 2552 RETURN all -- * * 0.0.0.0/0 0.0.0.0/0
Chain DOCKER-ISOLATION-STAGE-2 (3 references)
pkts bytes target prot opt in out source destination
0 0 DROP all -- * docker0 0.0.0.0/0 0.0.0.0/0
0 0 DROP all -- * br-42712dcc4910 0.0.0.0/0 0.0.0.0/0
0 0 DROP all -- * br-3122fd0dcf95 0.0.0.0/0 0.0.0.0/0
0 0 RETURN all -- * * 0.0.0.0/0 0.0.0.0/0
Chain DOCKER-USER (1 references)
pkts bytes target prot opt in out source destination
25 2552 RETURN all -- * * 0.0.0.0/0 0.0.0.0/0
cat /etc/netplan/01-network-manager-all.yaml
# Let NetworkManager manage all devices on this system
network:
version: 2
renderer: NetworkManager