diff --git a/docs/swarm/1.5/README.md b/docs/swarm/1.5/README.md new file mode 100644 index 00000000..6b56e642 --- /dev/null +++ b/docs/swarm/1.5/README.md @@ -0,0 +1,364 @@ +# Install Mailu on a docker swarm + +## Prequisites + +### Swarm + +In order to deploy Mailu on a swarm, you will first need to initialize the swarm: + +The main command will be: +```bash +docker swarm init --advertise-addr +``` +See https://docs.docker.com/engine/swarm/swarm-tutorial/create-swarm/ + +If you want to add other managers or workers, please use: +```bash +docker swarm join --token xxxxx +``` +See https://docs.docker.com/engine/swarm/join-nodes/ + +You have now a working swarm, and you can check its status with: +```bash +core@coreos-01 ~/git/Mailu/docs/swarm/1.5 $ docker node ls +ID HOSTNAME STATUS AVAILABILITY MANAGER STATUS ENGINE VERSION +xhgeekkrlttpmtgmapt5hyxrb black-pearl Ready Active 18.06.0-ce +sczlqjgfhehsfdjhfhhph1nvb * coreos-01 Ready Active Leader 18.03.1-ce +mzrm9nbdggsfz4sgq6dhs5i6n flying-dutchman Ready Active 18.06.0-ce +``` + +### Volume definition +For data persistance (the Mailu services might be launched/relaunched on any of the swarm nodes), we need to have Mailu data stored in a manner accessible by every manager or worker in the swarm. +Hereafter we will use a NFS share: +```bash +core@coreos-01 ~ $ showmount -e 192.168.0.30 +Export list for 192.168.0.30: +/mnt/Pool1/pv 192.168.0.0 +``` + +on the nfs server, I am using the following /etc/exports +```bash +$more /etc/exports +/mnt/Pool1/pv -alldirs -mapall=root -network 192.168.0.0 -mask 255.255.255.0 +``` +on the nfs server, I created the Mailu directory (in fact I copied a working Mailu set-up) +```bash +$mkdir /mnt/Pool1/pv/mailu +``` + +On your manager node, mount the nfs share to check that the share is available: +```bash +core@coreos-01 ~ $ sudo mount -t nfs 192.168.0.30:/mnt/Pool1/pv/mailu /mnt/local/ +``` +If this is ok, you can umount it: +```bash +core@coreos-01 ~ $ sudo umount /mnt/local/ +``` + + +### Networking mode +On a swarm, the services are available (default mode) through a routing mesh managed by docker itself. With this mode, each service is given a virtual IP adress and docker manages the routing between this virtual IP and the container(s) provinding this service. +With this default networking mode, I cannot get login working properly... As found in https://github.com/Mailu/Mailu/issues/375 , a workaround is to use the dnsrr networking mode at least for the front services. + +The main consequence/limitation will be that the front services will *not* be available on every node, but only on the node where it will be deployed. In my case, I have only one manager and I choose to deploy the front service to the manager node, so I know on wich IP the front service will be available (aka the IP adress of my manager node). + +### Variable substitution and docker-compose.yml +The docker stack deploy command doesn't support variable substitution in the .yml file itself (but we still can use .env file to pass variables to the services). As a consequence we need to adjust the docker-compose file in order to : +- remove all variables : $VERSION , $BIND_ADDRESS4 , $BIND_ADDRESS6 , $ANTIVIRUS , $WEBMAIL , etc +- change the way we define the volumes (nfs share in our case) +- add a deploy section for every service + +### Docker compose +An example of docker-compose-stack.yml file is available here: + +```yaml + +version: '3.2' + +services: + + front: + image: mailu/nginx:1.5 + env_file: .env + ports: + - target: 80 + published: 80 + mode: host + - target: 443 + published: 443 + mode: host + - target: 110 + published: 110 + mode: host + - target: 143 + published: 143 + mode: host + - target: 993 + published: 993 + mode: host + - target: 995 + published: 995 + mode: host + - target: 25 + published: 25 + mode: host + - target: 465 + published: 465 + mode: host + - target: 587 + published: 587 + mode: host + volumes: +# - "$ROOT/certs:/certs" + - type: volume + source: mailu_certs + target: /certs + deploy: + endpoint_mode: dnsrr + replicas: 1 + placement: + constraints: [node.role == manager] + + redis: + image: redis:alpine + restart: always + volumes: +# - "$ROOT/redis:/data" + - type: volume + source: mailu_redis + target: /data + deploy: + endpoint_mode: dnsrr + replicas: 1 + placement: + constraints: [node.role == manager] + + imap: + image: mailu/dovecot:1.5 + restart: always + env_file: .env + volumes: +# - "$ROOT/data:/data" + - type: volume + source: mailu_data + target: /data +# - "$ROOT/mail:/mail" + - type: volume + source: mailu_mail + target: /mail +# - "$ROOT/overrides:/overrides" + - type: volume + source: mailu_overrides + target: /overrides + depends_on: + - front + deploy: + endpoint_mode: dnsrr + replicas: 1 + placement: + constraints: [node.role == manager] + + smtp: + image: mailu/postfix:1.5 + restart: always + env_file: .env + volumes: +# - "$ROOT/data:/data" + - type: volume + source: mailu_data + target: /data +# - "$ROOT/overrides:/overrides" + - type: volume + source: mailu_overrides + target: /overrides + depends_on: + - front + deploy: + endpoint_mode: dnsrr + replicas: 1 + placement: + constraints: [node.role == manager] + + antispam: + image: mailu/rspamd:1.5 + restart: always + env_file: .env + depends_on: + - front + volumes: +# - "$ROOT/filter:/var/lib/rspamd" + - type: volume + source: mailu_filter + target: /var/lib/rspamd +# - "$ROOT/dkim:/dkim" + - type: volume + source: mailu_dkim + target: /dkim +# - "$ROOT/overrides/rspamd:/etc/rspamd/override.d" + - type: volume + source: mailu_overrides_rspamd + target: /etc/rspamd/override.d + deploy: + endpoint_mode: dnsrr + replicas: 1 + placement: + constraints: [node.role == manager] + + antivirus: + image: mailu/none:1.5 + restart: always + env_file: .env + volumes: +# - "$ROOT/filter:/data" + - type: volume + source: mailu_filter + target: /data + deploy: + endpoint_mode: dnsrr + replicas: 1 + placement: + constraints: [node.role == manager] + + webdav: + image: mailu/none:1.5 + restart: always + env_file: .env + volumes: +# - "$ROOT/dav:/data" + - type: volume + source: mailu_dav + target: /data + deploy: + endpoint_mode: dnsrr + replicas: 1 + placement: + constraints: [node.role == manager] + + admin: + image: mailu/admin:1.5 + restart: always + env_file: .env + volumes: +# - "$ROOT/data:/data" + - type: volume + source: mailu_data + target: /data +# - "$ROOT/dkim:/dkim" + - type: volume + source: mailu_dkim + target: /dkim + - /var/run/docker.sock:/var/run/docker.sock:ro + depends_on: + - redis + deploy: + endpoint_mode: dnsrr + replicas: 1 + placement: + constraints: [node.role == manager] + + webmail: + image: "mailu/roundcube:1.5" + restart: always + env_file: .env + volumes: +# - "$ROOT/webmail:/data" + - type: volume + source: mailu_data + target: /data + depends_on: + - imap + deploy: + endpoint_mode: dnsrr + replicas: 1 + placement: + constraints: [node.role == manager] + + fetchmail: + image: mailu/fetchmail:1.5 + restart: always + env_file: .env + volumes: +# - "$ROOT/data:/data" + - type: volume + source: mailu_data + target: /data + logging: + driver: none + deploy: + endpoint_mode: dnsrr + replicas: 1 + placement: + constraints: [node.role == manager] + +volumes: + mailu_filter: + driver_opts: + type: "nfs" + o: "addr=192.168.0.30,nolock,soft,rw" + device: ":/mnt/Pool1/pv/mailu/filter" + mailu_dkim: + driver_opts: + type: "nfs" + o: "addr=192.168.0.30,nolock,soft,rw" + device: ":/mnt/Pool1/pv/mailu/dkim" + mailu_overrides_rspamd: + driver_opts: + type: "nfs" + o: "addr=192.168.0.30,nolock,soft,rw" + device: ":/mnt/Pool1/pv/mailu/overrides/rspamd" + mailu_data: + driver_opts: + type: "nfs" + o: "addr=192.168.0.30,nolock,soft,rw" + device: ":/mnt/Pool1/pv/mailu/data" + mailu_mail: + driver_opts: + type: "nfs" + o: "addr=192.168.0.30,nolock,soft,rw" + device: ":/mnt/Pool1/pv/mailu/mail" + mailu_overrides: + driver_opts: + type: "nfs" + o: "addr=192.168.0.30,nolock,soft,rw" + device: ":/mnt/Pool1/pv/mailu/overrides" + mailu_dav: + driver_opts: + type: "nfs" + o: "addr=192.168.0.30,nolock,soft,rw" + device: ":/mnt/Pool1/pv/mailu/dav" + mailu_certs: + driver_opts: + type: "nfs" + o: "addr=192.168.0.30,nolock,soft,rw" + device: ":/mnt/Pool1/pv/mailu/certs" + mailu_redis: + driver_opts: + type: "nfs" + o: "addr=192.168.0.30,nolock,soft,rw" + device: ":/mnt/Pool1/pv/mailu/redis" +``` + +### Deploy Mailu on the docker swarm +Run the following command: +```bash +docker stack deploy -c docker-compose-stack.yml mailu +``` +See how the services are being deployed: +```bash +core@coreos-01 ~ $ docker service ls +ID NAME MODE REPLICAS IMAGE PORTS +ywnsetmtkb1l mailu_antivirus replicated 1/1 mailu/none:1.5 +pqokiaz0q128 mailu_fetchmail replicated 1/1 mailu/fetchmail:1.5 +``` +check a specific service: +```bash +core@coreos-01 ~ $ docker service ps mailu_fetchmail +ID NAME IMAGE NODE DESIRED STATE CURRENT STATE ERROR PORTS +tbu8ppgsdffj mailu_fetchmail.1 mailu/fetchmail:1.5 coreos-01 Running Running 11 days ago +``` + +### Remove the stack +Run the follwoing command: +```bash +core@coreos-01 ~ $ docker stack rm mailu +```