Problem with IPv6

[josselinlbe]

Hi,

Google Cloud Platform Docker version 18.06.0-ce, build 0ffa825 Docker-compose version 1.22.0, build f46880fe

I update my repo and I have this error:

root@mx:/home/**/Mailcow# docker-compose up -d
Creating network "mailcow_mailcow-network" with driver "bridge"
ERROR: Pool overlaps with other one on this address space
root@mx:/home/**/Mailcow# docker network create mailcow_mailcow-network
0a3a9927b57f4ac1bcb6a53679f1393bb88a63236fd1ff48799567d644c448e2
root@mx:/home/**/Mailcow# docker-compose up -d
ERROR: Network "mailcow_mailcow-network" needs to be recreated - enable_ipv6 has changed

I test this: https://docs.docker.com/config/daemon/ipv6/ + docker-compose down + docker network rm = but it didn't change anything.

And try to disabled IpV6: docker-compose.yml

networks:
  mailcow-network:
    driver: bridge
    enable_ipv6: true
    ipam:
      driver: default
      config:
        - subnet: ${IPV4_NETWORK:-172.22.1}.0/24
        - subnet: ${IPV6_NETWORK:-fd4d:6169:6c63:6f77::/64}

mailcow.conf

# Disable IPv6
# mailcow-network will still be created as IPv6 enabled, all containers will be created
# without IPv6 support.
# Use 1 for disabled, 0 for enabled
SYSCTL_IPV6_DISABLED=0

But i have many errors...

root@mx:/home/**/Mailcow# docker-compose up -d
Creating network "mailcow_mailcow-network" with driver "bridge"
ERROR: Pool overlaps with other one on this address space
root@mx:/home/**/Mailcow# docker network create mailcow_mailcow-network
0c821ce01ba590affffb9f219b869c02c26f7816867f0b622f4e54586b8feddb
root@mx:/home/**/Mailcow# docker-compose up -d
Creating mailcow_watchdog-mailcow_1 ...
Creating mailcow_unbound-mailcow_1  ...
Creating mailcow_sogo-mailcow_1      ... error
Creating mailcow_unbound-mailcow_1   ... error
Creating mailcow_clamd-mailcow_1    ...
Creating mailcow_ipv6nat_1          ...
Creating mailcow_watchdog-mailcow_1  ... done
Creating mailcow_dovecot-mailcow_1   ...
Creating mailcow_memcached-mailcow_1 ...
Creating mailcow_postfix-mailcow_1   ... done
Creating mailcow_clamd-mailcow_1     ... done
Creating mailcow_ipv6nat_1           ... done
Creating mailcow_dockerapi-mailcow_1 ... done
Creating mailcow_dovecot-mailcow_1   ... done
Creating mailcow_memcached-mailcow_1 ... done
Creating mailcow_mysql-mailcow_1     ... done
ERROR: for mailcow_redis-mailcow_1  user specified IP address is supported only when connecting to networks with user configured subnets

ERROR: for sogo-mailcow  user specified IP address is supported only when connecting to networks with user configured subnets

ERROR: for unbound-mailcow  user specified IP address is supported only when connecting to networks with user configured subnets

ERROR: for redis-mailcow  user specified IP address is supported only when connecting to networks with user configured subnets
ERROR: Encountered errors while bringing up the project.
root@mx:/home/**/Mailcow#

[mkuron]

If it worked previously, there is no need to disable IPv6. It looks like you might still have containers or networks that were not taken down successfully before the upgrade. Try docker-compose down, check whether docker ps lists any leftover containers, reboot your server and then bring Mailcow back up.

[andryyy]

Also looks like you moved the folder and it cannot read a .env file anymore. Is .env still a symlink to mailcow.conf?

[josselinlbe]

Hi there, ok @mkuron. Done but I still have the same error. .env symlink is ok. If I save mailcow with the tool, it is possible to reinstall everything cleanly?

root@mx:/home/**/Mailcow# ls -l -a
total 124
drwxr-xr-x 5 root           root            4096 Jul 23 16:05 .
drwxr-xr-x 8 ** ** 4096 Jul 22 19:08 ..
-rw-r--r-- 1 root           root            3223 Jan 16  2018 CODE_OF_CONDUCT.md
-rw-r--r-- 1 root           root             954 Jan 16  2018 CONTRIBUTING.md
drwxr-xr-x 6 root           root            4096 Jan 16  2018 data
-rw-r--r-- 1 root           root           12755 Jul 23 16:05 docker-compose.yml
-rw-r--r-- 1 root           root            2327 Jul 22 18:54 .env
-rwxr-xr-x 1 root           root            4209 Jul 22 17:55 generate_config.sh
drwxr-xr-x 8 root           root            4096 Jul 22 20:20 .git
-rw-r--r-- 1 root           root             578 Apr 12 10:24 .gitignore
drwxr-xr-x 2 root           root            4096 Jul 22 17:55 helper-scripts
-rw-r--r-- 1 root           root           35141 Jan 16  2018 LICENSE
-rw-r--r-- 1 root           root            2446 Jul 23 16:05 mailcow.conf
-rw-r--r-- 1 root           root            2537 Jul 22 17:56 mailcow.conf_backup
-rw-r--r-- 1 root           root             592 Jan 16  2018 README.md
-rw-r--r-- 1 root           root            1746 Jan 16  2018 .travis.yml
-rwxr-xr-x 1 root           root           12171 Jul 22 17:55 update.sh
root@mx:/home/**/Mailcow# cat .env
# ------------------------------
# mailcow web ui configuration
# ------------------------------
# example.org is _not_ a valid hostname, use a fqdn here.
# Default admin user is "admin"
# Default password is "moohoo"
MAILCOW_HOSTNAME=**

# ------------------------------
# SQL database configuration
# ------------------------------
DBNAME=**
DBUSER=**
....

[mkuron]

Something is wrong with your Docker. Please check docker network ls after doing docker-compose down. There are leftovers somewhere. A backup and restore won't help here, you would need to reinstall the entire machine. Or we can try to figure out what is stuck.

[mkuron]

And judging from your ls, the symlink is not ok. It's a file, not a link.

[josselinlbe]

Ah yes, it's ok for the symlink... :+1:

root@mx:/home/**/Mailcow# ls -a -l
total 120
drwxr-xr-x 5 root           root            4096 Jul 23 16:24 .
drwxr-xr-x 8 ** ** 4096 Jul 22 19:08 ..
-rw-r--r-- 1 root           root            3223 Jan 16  2018 CODE_OF_CONDUCT.md
-rw-r--r-- 1 root           root             954 Jan 16  2018 CONTRIBUTING.md
drwxr-xr-x 6 root           root            4096 Jan 16  2018 data
-rw-r--r-- 1 root           root           12755 Jul 23 16:05 docker-compose.yml
lrwxrwxrwx 1 root           root              12 Jul 23 16:24 .env -> mailcow.conf
-rwxr-xr-x 1 root           root            4209 Jul 22 17:55 generate_config.sh
drwxr-xr-x 8 root           root            4096 Jul 22 20:20 .git
-rw-r--r-- 1 root           root             578 Apr 12 10:24 .gitignore
drwxr-xr-x 2 root           root            4096 Jul 22 17:55 helper-scripts
-rw-r--r-- 1 root           root           35141 Jan 16  2018 LICENSE
-rw-r--r-- 1 root           root            2446 Jul 23 16:05 mailcow.conf
-rw-r--r-- 1 root           root            2537 Jul 22 17:56 mailcow.conf_backup
-rw-r--r-- 1 root           root             592 Jan 16  2018 README.md
-rw-r--r-- 1 root           root            1746 Jan 16  2018 .travis.yml
-rwxr-xr-x 1 root           root           12171 Jul 22 17:55 update.sh

root@mx:/home/**/Mailcow# docker-compose down
WARNING: The WATCHDOG_NOTIFY_EMAIL variable is not set. Defaulting to a blank string.
Removing network mailcowdockerized_mailcow-network

root@mx:/home/**/Mailcow# docker network create mailcowdockerized_mailcow-network
4ff15e9c7cf07aa897c26f3277a535815657edf41d714b8c2a075ca4455c9f2d

root@mx:/home/**/Mailcow# docker-compose up -d
WARNING: The WATCHDOG_NOTIFY_EMAIL variable is not set. Defaulting to a blank string.
ERROR: Network "mailcowdockerized_mailcow-network" needs to be recreated - enable_ipv6 has changed

Wut, I don't understand... Even with a new installation it doesn't work, is it my Docker (Compose) version ?

root@mx:/home/**/Mailcow# docker-compose down
WARNING: The WATCHDOG_NOTIFY_EMAIL variable is not set. Defaulting to a blank string.
Removing network mailcowdockerized_mailcow-network

root@mx:/home/**/Mailcow# docker network ls
NETWORK ID          NAME                          DRIVER              SCOPE
0be8e0b85b3b        bridge                        bridge              local
3f777dcff60d        host                          host                local
6c7c9fcdbe0d        **          bridge              local
6fe25796d1d8        **            bridge              local
efb917c032a2        **   bridge              local
e8ed930baa5f        **        bridge              local
45b969e69f63        web                           bridge              local

root@mx:/home/**/Mailcow# docker network create mailcowdockerized_mailcow-network
f8c256fc0ece8ff5de07ce19ad6fd8a2ad44d3cdb687fdaf277f9b39acde256f

root@mx:/home/**/Mailcow# docker-compose up -d
WARNING: The WATCHDOG_NOTIFY_EMAIL variable is not set. Defaulting to a blank string.
ERROR: Network "mailcowdockerized_mailcow-network" needs to be recreated - enable_ipv6 has changed

[andryyy]

Sure, your previous network (and most likely still existing network) was named "mailcow". Do you have any other containers running? If not, kill them all..

docker rm -f $(docker ps -a -q)
docker-compose down
docker network rm $(docker network ls | grep bridge | grep mailcow | awk '{print $1}')
systemctl restart docker
docker-compose up -d

[mkuron]

docker network create mailcowdockerized_mailcow-network

Why would you create the network manually? Delete it and have docker-compose automatically create it (with the right settings) and everything should be fine.

[josselinlbe]

When i try docker network prune + docker-compose up -d I have this:

root@mx:/home/**/Mailcow# docker-compose up -d
WARNING: The WATCHDOG_NOTIFY_EMAIL variable is not set. Defaulting to a blank string.
Creating network "mailcowdockerized_mailcow-network" with driver "bridge"
ERROR: Pool overlaps with other one on this address space

[josselinlbe]

It's ok. I've stop all my containers + deleted all my networks..

root@mx:/home/**/Mailcow# docker network prune
WARNING! This will remove all networks not used by at least one container.
Are you sure you want to continue? [y/N] y
Deleted Networks:
**
**
**

root@mx:/home/**/Mailcow# docker-compose up -d
WARNING: The WATCHDOG_NOTIFY_EMAIL variable is not set. Defaulting to a blank string.
Creating network "mailcowdockerized_mailcow-network" with driver "bridge"
Creating mailcowdockerized_watchdog-mailcow_1  ... done
Creating mailcowdockerized_memcached-mailcow_1 ... done
Creating mailcowdockerized_clamd-mailcow_1     ... done
Creating mailcowdockerized_dockerapi-mailcow_1 ... done
Creating mailcowdockerized_sogo-mailcow_1      ... done
..