IPv6 support #844

Peetz0r · 2021-01-30T19:55:09Z

matrix_docker_ipv6_enabled is true by default. I think IPv6 should be everywhere by now.

Nginx now always listens on ipv6.

When the setting is true, the matrix_docker_network gets created with ipv6 enabled. Because we are basically doing NATv6 between the host and the containers there is a service that sets up the ip6tables rule.

I also moved the matrix-certbot into the matrix_docker_network because in my ipv6-only tests it couldn't validate in the default bridge network.

roles/matrix-base/tasks/server_base/docker_ipv6.yml

pushytoxin · 2021-01-30T20:15:05Z

You are running NAT6 in one direction, but I can't see ~~FORWARD~~ DNAT rules for the exposed sockets in the other. How does this even work?
Or does it rely on the userland proxy?

Peetz0r · 2021-01-30T20:29:06Z

You are running NAT6 in one direction, but I can't see FORWARD rules for the exposed sockets in the other. How does this even work?
Or does it rely on the userland proxy?

Yes, it uses the userland proxy for incoming traffic, and it uses NAT6 for outgoing traffic.

As of a few minutes ago I am running this setup on glitch.im, so you see it working when you see @peetz0r:glitch.im talking anywhere.

pushytoxin · 2021-01-30T20:33:51Z

Last time I tried this, the nginx/coturn logs from IPv6 users and federated servers contained nothing but the userland proxy address, which is the same as the gateway. Is it still like that?

Peetz0r · 2021-01-30T20:41:29Z

Last time I tried this, the nginx/coturn logs from IPv6 users and federated servers contained nothing but the userland proxy address, which is the same as the gateway. Is it still like that?

Correct, they all get reported as fd00::1.

Peetz0r · 2021-01-30T20:42:57Z

Also I did some more testing, and it's still not fully working. When I go inside a container I can reach only v4 servers on the internet somehow. This worked earlier and I have no clue what I am doing...

pushytoxin · 2021-01-30T20:45:33Z

Last time I tried this, the nginx/coturn logs from IPv6 users and federated servers contained nothing but the userland proxy address, which is the same as the gateway. Is it still like that?

Correct, they all get reported as fd00::1.

That's kind of a bummer

aaronraimist · 2021-01-30T23:54:50Z

roles/matrix-base/templates/matrix-ip6tables.service.j2

+Type=oneshot
+Environment="HOME={{ matrix_systemd_unit_home_path }}"
+
+ExecStart=ip6tables -t nat -A POSTROUTING -s fd00::/80 ! -o docker0 -j MASQUERADE


Suggested change

ExecStart=ip6tables -t nat -A POSTROUTING -s fd00::/80 ! -o docker0 -j MASQUERADE

ExecStart={{ matrix_host_command_sh }} -c "ip6tables -t nat -A POSTROUTING -s fd00::/80 ! -o docker0 -j MASQUERADE"

Changing this made it work for me. I don't know if this is the right solution.

That'd be unnecessary shell invocation. It works, but it's not the best. Something involving an absolute path to env is probably the right solution. And I also forgot the second import ip6tables rule in there.

Like I said, this needs more testing before it's ready :p

It is recommended to put absolute paths into ExecStart=, in this case that would be /usr/sbin/ip6tables

Peetz0r · 2021-01-31T00:02:54Z

@aaronraimist your ip6tables rules should now work.

Also I did some more testing, and it's still not fully working. When I go inside a container I can reach only v4 servers on the internet somehow. This worked earlier and I have no clue what I am doing...

This should also be fixed now

Peetz0r · 2021-01-31T02:43:05Z

Last time I tried this, the nginx/coturn logs from IPv6 users and federated servers contained nothing but the userland proxy address, which is the same as the gateway. Is it still like that?

Correct, they all get reported as fd00::1.

That's kind of a bummer

I might spend some time next week on trying out https://github.com/robbertkl/docker-ipv6nat to fix this.

No guarantees, obviously.

aaronraimist · 2021-02-16T20:46:11Z

Is there anything else that needs to happen here to merge this? It's been working for me. Seems like using https://github.com/robbertkl/docker-ipv6nat could happen in the future.

spantaleev · 2021-02-17T07:16:16Z

matrix_host_command_iptables seems to be unused, so we can remove it.

I was wondering if we need to install iptables explicitly to ensure it's there, but it seems like it's pulled as a dependency for various things on various distros. On Archlinux, even systemd requires iptables to be there. On CentOS 7, iptables is also required by docker-ce one way or another. On Debian (well, Raspbian), iptables is some dependency for containerd.io. I guess we can safely assume that it's available.

aaronraimist · 2021-04-17T04:23:52Z

Could we move this forward?

Peetz0r · 2021-04-17T04:51:46Z

I guess I'm not gonna do the proper fix for the "everything is fd00::1" issue. But some support might still be better than none. Especially if it's disabled by default.

Having IPv6 disabled by default doesn't sit well with me, but having this PR sitting dormant for months is definitely worse.

Lemme mark as non-a-draft-anymore and get it into a state without conflicts.

Works for all containers Major downside is that all ipv6 adresses are logged as fd00::1

Required in ipv6-only setups. The default docker network is ipv4-only, so validation would fail. Our own network has ipv6 (if enabled) so that works fine.

spantaleev · 2021-04-17T08:25:30Z

roles/matrix-base/tasks/server_base/docker_ipv6.yml

+      daemon_reload: yes
+    when: "matrix_ip6tables_systemd_service_result.changed"
+
+  - name: Ensure matrix-ip6tables.service is started and autoruns


We should probably inject this into matrix_systemd_services_list and start it as part of --tags=start.

On the other hand, maybe that makes it start too late? We probably wish to have working IPv6 connectivity for the purposes of obtaining SSL certificates, for example..? Is that why this is here?

CaptainMalu · 2023-09-14T09:42:31Z

Any news about this topic?
I'm not good enough with docker and ansible to configure IPv6 support on my own.

I added this part into my vars.yaml to most likely only have to set enable ipv6 for the network creation part. But i'm not sure which dockernetworks need it and if it will work.

docker_daemon_options:
  experimental:  true
  ip6tables:     true
  ipv6:          true
  fixed-cidr-v6: "fc01:1:1:1::/64"
  default-address-pools: [
    { "base": "172.17.0.0/16", "size": 16 },
    { "base": "172.18.0.0/16", "size": 16 },
    { "base": "172.19.0.0/16", "size": 16 },
    { "base": "172.20.0.0/14", "size": 16 },
    { "base": "172.24.0.0/14", "size": 16 },
    { "base": "172.28.0.0/14", "size": 16 },
    { "base": "192.168.0.0/16", "size": 20 },
    { "base": "fc01:1:1:2:1::/104", "size": 112 },
    { "base": "fc01:1:1:2:2::/104", "size": 112 },
    { "base": "fc01:1:1:2:3::/104", "size": 112 },
    { "base": "fc01:1:1:2:4::/104", "size": 112 },
    { "base": "fc01:1:1:2:5::/104", "size": 112 }
    ]

ly1998117 · 2023-12-19T12:05:02Z

Any news about this topic? I'm not good enough with docker and ansible to configure IPv6 support on my own.

I added this part into my vars.yaml to most likely only have to set enable ipv6 for the network creation part. But i'm not sure which dockernetworks need it and if it will work.

docker_daemon_options:
  experimental:  true
  ip6tables:     true
  ipv6:          true
  fixed-cidr-v6: "fc01:1:1:1::/64"
  default-address-pools: [
    { "base": "172.17.0.0/16", "size": 16 },
    { "base": "172.18.0.0/16", "size": 16 },
    { "base": "172.19.0.0/16", "size": 16 },
    { "base": "172.20.0.0/14", "size": 16 },
    { "base": "172.24.0.0/14", "size": 16 },
    { "base": "172.28.0.0/14", "size": 16 },
    { "base": "192.168.0.0/16", "size": 20 },
    { "base": "fc01:1:1:2:1::/104", "size": 112 },
    { "base": "fc01:1:1:2:2::/104", "size": 112 },
    { "base": "fc01:1:1:2:3::/104", "size": 112 },
    { "base": "fc01:1:1:2:4::/104", "size": 112 },
    { "base": "fc01:1:1:2:5::/104", "size": 112 }
    ]

I used ipv6nat to make the server work on my IPv6 VPS. According to my practice, the federation function works well. For more details, please refer to my repo ipv6 support.

Peetz0r force-pushed the ipv6 branch from 223f14d to 75c4679 Compare January 30, 2021 19:56

pushytoxin reviewed Jan 30, 2021

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roles/matrix-base/tasks/server_base/docker_ipv6.yml Outdated Show resolved Hide resolved

Peetz0r force-pushed the ipv6 branch 2 times, most recently from b7cf268 to d62111d Compare January 30, 2021 20:11

Peetz0r marked this pull request as draft January 30, 2021 20:43

aaronraimist reviewed Jan 30, 2021

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Peetz0r force-pushed the ipv6 branch from d62111d to 5aa7ab4 Compare January 31, 2021 00:01

Peetz0r marked this pull request as ready for review April 17, 2021 04:49

Peetz0r added 4 commits April 17, 2021 07:11

Let nginx listen op ipv6

b38fc14

IPv6 support for docker

dcc178a

Works for all containers Major downside is that all ipv6 adresses are logged as fd00::1

Run certbot in matrix docker-network

31a9548

Required in ipv6-only setups. The default docker network is ipv4-only, so validation would fail. Our own network has ipv6 (if enabled) so that works fine.

Workers listen on ipv6

2d04d1e

Peetz0r force-pushed the ipv6 branch 2 times, most recently from bed6253 to 2d04d1e Compare April 17, 2021 05:17

spantaleev reviewed Apr 17, 2021

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IPv6 support #844

IPv6 support #844

Peetz0r commented Jan 30, 2021

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Peetz0r commented Jan 30, 2021

Peetz0r commented Jan 30, 2021

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aaronraimist Jan 30, 2021

Peetz0r Jan 31, 2021

pushytoxin Feb 1, 2021

Peetz0r commented Jan 31, 2021

Peetz0r commented Jan 31, 2021

aaronraimist commented Feb 16, 2021

spantaleev commented Feb 17, 2021

aaronraimist commented Apr 17, 2021

Peetz0r commented Apr 17, 2021

spantaleev Apr 17, 2021

CaptainMalu commented Sep 14, 2023 •

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ly1998117 commented Dec 19, 2023

	ExecStart=ip6tables -t nat -A POSTROUTING -s fd00::/80 ! -o docker0 -j MASQUERADE
	ExecStart={{ matrix_host_command_sh }} -c "ip6tables -t nat -A POSTROUTING -s fd00::/80 ! -o docker0 -j MASQUERADE"

IPv6 support #844

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IPv6 support #844

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