From 23e288aadcf7d5df941c8516fae9d0cbd6b1e054 Mon Sep 17 00:00:00 2001 From: ofthesun9 Date: Mon, 24 Sep 2018 17:29:31 +0000 Subject: [PATCH] Enabling swarm deployment on master branch: -Extends the usage of POD_ADDRESS_RANGE -Provides documentation --- core/dovecot/conf/dovecot.conf | 2 +- core/postfix/conf/main.cf | 2 +- docs/swarm/master/README.md | 349 +++++++++++++++++++++ services/rspamd/conf/worker-controller.inc | 2 +- 4 files changed, 352 insertions(+), 3 deletions(-) create mode 100644 docs/swarm/master/README.md diff --git a/core/dovecot/conf/dovecot.conf b/core/dovecot/conf/dovecot.conf index a5973bf8..7cf10774 100644 --- a/core/dovecot/conf/dovecot.conf +++ b/core/dovecot/conf/dovecot.conf @@ -5,7 +5,7 @@ log_path = /dev/stderr protocols = imap pop3 lmtp sieve postmaster_address = {{ POSTMASTER }}@{{ DOMAIN }} hostname = {{ HOSTNAMES.split(",")[0] }} -submission_host = {{ FRONT_ADDRESS }} +submission_host = {{ FRONT_ADDRESS }} {{ POD_ADDRESS_RANGE }} service dict { unix_listener dict { diff --git a/core/postfix/conf/main.cf b/core/postfix/conf/main.cf index 2f2c6990..bde42dd1 100644 --- a/core/postfix/conf/main.cf +++ b/core/postfix/conf/main.cf @@ -32,7 +32,7 @@ relayhost = {{ RELAYHOST }} recipient_delimiter = {{ RECIPIENT_DELIMITER }} # Only the front server is allowed to perform xclient -smtpd_authorized_xclient_hosts={{ FRONT_ADDRESS }} +smtpd_authorized_xclient_hosts={{ FRONT_ADDRESS }} {{ POD_ADDRESS_RANGE }} ############### # TLS diff --git a/docs/swarm/master/README.md b/docs/swarm/master/README.md new file mode 100644 index 00000000..1406e05c --- /dev/null +++ b/docs/swarm/master/README.md @@ -0,0 +1,349 @@ +# 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) providing this service. + +In order to allow every (front & webmail) container to access the other services, we will use the variable POD_ADDRESS_RANGE. + +Let's create the mailu_default network: +```bash +core@coreos-01 ~ $ docker network create -d overlay --attachable mailu_default +core@coreos-01 ~ $ docker network inspect mailu_default | grep Subnet + "Subnet": "10.0.1.0/24", +``` +In the docker-compose.yml file, we will then use POD_ADDRESS_RANGE = 10.0.1.0/24 + +Nota: on my setup, imap & smtp logs doesn't show the IPs from the front(s) container(s), but the IP of "mailu_default-endpoint". So it might be sufficient to set POD_ADDRESS_RANGE to this specific ip (which can be found by inspecting mailu_default network) + +### Scalability +- smtp and imap are scalable +- front and webmail are scalable (pending POD_ADDRESS_RANGE is used), although the let's encrypt magic might not like it (race condidtion ? or risk to be banned by let's encrypt server if too many front containers attemps to renew the certs at the same time) +- redis, antispam, antivirus, fetchmail, admin, webdav have not been tested (hence replicas=1 in the following docker-compose.yml file) + +### 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 , $WEBMAIL , etc +- change the way we define the volumes (nfs share in our case) +- add a deploy section for every service + +### Docker compose +An example of docker-compose-stack.yml file is available here: + +```yaml + +version: '3.2' + +services: + + front: + image: mailu/nginx:master + restart: always + env_file: .env + ports: + - target: 80 + published: 80 + - target: 443 + published: 443 + - target: 110 + published: 110 + - target: 143 + published: 143 + - target: 993 + published: 993 + - target: 995 + published: 995 + - target: 25 + published: 25 + - target: 465 + published: 465 + - target: 587 + published: 587 + volumes: +# - "$ROOT/certs:/certs" + - type: volume + source: mailu_certs + target: /certs + deploy: + replicas: 2 + + redis: + image: redis:alpine + restart: always + volumes: +# - "$ROOT/redis:/data" + - type: volume + source: mailu_redis + target: /data + deploy: + replicas: 1 + + imap: + image: mailu/dovecot:master + restart: always + env_file: .env + environment: + - POD_ADDRESS_RANGE=10.0.1.0/24 + volumes: +# - "$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: + replicas: 2 + + smtp: + image: mailu/postfix:master + restart: always + env_file: .env + environment: + - POD_ADDRESS_RANGE=10.0.1.0/24 + 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: + replicas: 2 + + antispam: + image: mailu/rspamd:master + restart: always + env_file: .env + environment: + - POD_ADDRESS_RANGE=10.0.1.0/24 + 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 +# - "$ROOT/overrides/rspamd:/etc/rspamd/override.d" + - type: volume + source: mailu_overrides_rspamd + target: /etc/rspamd/override.d + deploy: + replicas: 1 + + antivirus: + image: mailu/none:master + restart: always + env_file: .env + volumes: +# - "$ROOT/filter:/data" + - type: volume + source: mailu_filter + target: /data + deploy: + replicas: 1 + + webdav: + image: mailu/none:master + restart: always + env_file: .env + volumes: +# - "$ROOT/dav:/data" + - type: volume + source: mailu_dav + target: /data + deploy: + replicas: 1 + + admin: + image: mailu/admin:master + restart: always + env_file: .env + volumes: +# - "$ROOT/data:/data" + - type: volume + source: mailu_data + target: /data +# - "$ROOT/dkim:/dkim" + - type: volume + source: mailu_dkim + target: /dkim + - /var/run/docker.sock:/var/run/docker.sock:ro + depends_on: + - redis + deploy: + replicas: 1 + + webmail: + image: "mailu/roundcube:master" + restart: always + env_file: .env + volumes: +# - "$ROOT/webmail:/data" + - type: volume + source: mailu_data + target: /data + depends_on: + - imap + deploy: + replicas: 2 + + fetchmail: + image: mailu/fetchmail:master + restart: always + env_file: .env + volumes: +# - "$ROOT/data:/data" + - type: volume + source: mailu_data + target: /data + deploy: + replicas: 1 + +networks: + default: + external: + name: mailu_default + +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 +``` diff --git a/services/rspamd/conf/worker-controller.inc b/services/rspamd/conf/worker-controller.inc index 6a020672..0cb0d5c0 100644 --- a/services/rspamd/conf/worker-controller.inc +++ b/services/rspamd/conf/worker-controller.inc @@ -1,3 +1,3 @@ bind_socket = "*:11334"; password = "mailu"; -secure_ip = "{{ FRONT_ADDRESS }}"; +secure_ip = "{{ FRONT_ADDRESS }} {{ POD_ADDRESS_RANGE }}";