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Mesos Compose Docker-in-Docker

This is a docker-compose cluster that uses mesos-slave-dind to collocate multiple slave nodes, each with their own docker daemon and /24 network allocation.

Cluster Topology

The cluster consists of several docker containers linked together by docker-managed hostnames:

Component Hostname Description
Zookeeper + Exhibitor zookeeper key/value store w/ process monitor & web gui
Mesos Master mesosmaster
master0.mesos
leader.mesos		 resource manager w/ web gui
Mesos-DNS mesosdns dns for mesos components, frameworks, and tasks
Mesos Slave (x2) mesosslave
slave0.mesos
slave1.mesos		 resource owner
Marathon marathon.mesos resource scheduler & container PaaS

Install on Mac

  1. Install Docker For Mac

  2. Install wget

    brew install wget

  3. Install probe

    brew tap karlkfi/homebrew-terminal
brew install probe

Install on Linux

  • Docker CLI - container management command line client
  • Docker Engine - container management daemon
  • Docker Compose - multi-container application orchestration
  • Probe (>= 0.2.0) - command-line service interrogator
  • Wget - command-line http client

Most of the above are available via apt and yum, but depending on your distribution, you may have to install via other means to get the latest versions.

It is recommended to use Ubuntu, simply because it supports OverlayFS, used by docker to mount volumes. Alternate file systems may not fully support docker-in-docker.

Configuration

Most configuration is contained in the docker-compose.yaml file.

Mesos-DNS is configured by mesos-dns-config.json.

Some other details (e.g. number of slaves) can be modified with environment variables. See env.sh for details.

Usage

Create a new cluster:

./bin/create.sh

Stop a running cluster:

./bin/stop.sh

Start a stopped cluster:

./bin/start.sh

Destroy a running or stopped cluster:

./bin/destroy.sh

DNS Config

In order to allow resolution of domain names on your host machine, mesos-dns need to be added as a nameserver.

Add Nameserver

sudo ./bin/dns-update.sh $(source lib/util.sh && util::find_docker_service_ips "mesosdns" | tail -1)

WARNING: This can be done before or after create, but will slow down host domain name resolution if mesos-dns is not running.

Remove Nameserver

This will remove the extra nameserver and leave the original one.

sudo ./bin/dns-update.sh

WARNING: Macs normally use auto-updating DNS, which is disabled as a side effect of dns-update. To restore auto-updates on network change: delete all DNS records in System Preferences > Network > [current network] > Advanced > DNS.

Tests

To verify Mesos-DNS (after running dns-update) run:

./test/dns.sh

To verify Marathon (after running dns-update) run:

./test/marathon.sh

User Interfaces

Mesos UI is accessible on port 5050. Get the IP on the command-line:

docker inspect -f '{{.NetworkSettings.IPAddress}}:5050' mcd_mesosmaster_1

Marathon UI is accessible on port 8080. Get the IP on the command-line:

docker inspect -f '{{.NetworkSettings.IPAddress}}:8080' mcd_marathon_1

Exhibitor UI is accessible on port 8080. Get the IP on the command-line:

docker inspect -f '{{.NetworkSettings.IPAddress}}:8080/exhibitor/v1/ui/index.html' mcd_zookeeper_1

License

Copyright 2015-2018 The Mesos Compose Docker-in-Docker Authors

Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at

http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.