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https://github.com/lloesche/mesosphere-dnsconfig
Generate Mesosphere configuration files from DNS data
https://github.com/lloesche/mesosphere-dnsconfig
Last synced: about 1 month ago
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Generate Mesosphere configuration files from DNS data
- Host: GitHub
- URL: https://github.com/lloesche/mesosphere-dnsconfig
- Owner: lloesche
- Created: 2015-04-28T14:57:13.000Z (over 9 years ago)
- Default Branch: master
- Last Pushed: 2015-04-28T15:03:13.000Z (over 9 years ago)
- Last Synced: 2023-09-05T04:25:47.315Z (about 1 year ago)
- Language: Go
- Size: 125 KB
- Stars: 1
- Watchers: 1
- Forks: 0
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
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README
# mesosphere-dnsconfig
Generate Mesosphere configuration files from DNS data
Set Up
------
* Install Go.
* Build source
```bash
go build mesosphere-dnsconfig.go
```
Usage
-----
```
# ./mesosphere-dnsconfig
-exec=false: start service
-hostname="": hostname to use, os hostname is used by default
-service="": service to configure: mesos-master, mesos-slave, marathon or zookeeper
-write=false: write configs to files
```
Paths
-----
Right now the following paths are hard coded:
- mesos-master: /etc/mesos-master/
- mesos-slave: /etc/mesos-slave/
- marathon: /etc/marathon/conf/
- zookeeper: /var/lib/zookeeper/myid and /etc/zookeeper/conf/zoo.cfg
For Mesosphere services configuration files are being created in the Mesosphere filename=key, file_content=value style. For Zookeeper the key myid will be written to /var/lib/zookeeper/myid, everything else is written to /etc/zookeeper/zoo.cfg.
DNS Setup
---------
mesosphere-dnsconfig starts by querying the nameserver for the following TXT record:
`config.._mesosphere.`
It then continues down the name hirarchy.
***Example***
- Hostname: srv2.hw.ca1.mesosphere.com
- Service: marathon
TXT record lookups:
```
config.marathon._mesosphere.srv2.hw.ca1.mesosphere.com
config.marathon._mesosphere.hw.ca1.mesosphere.com
config.marathon._mesosphere.ca1.mesosphere.com
config.marathon._mesosphere.mesosphere.com
config.marathon._mesosphere.com
```
The contents of the TXT records are either 'key=value' pairs for options or just 'key' for flags.
E.g.
```
config.marathon._mesosphere.mesosphere.com IN TXT "task_launch_timeout=300000"
IN TXT "checkpoint"
```
becomes the arguments `--task_launch_timeout=300000 --checkpoint`.
***Extended Example***
```
$ host -t txt config.marathon._mesosphere.hw.ca1.mesosphere.com
config.marathon._mesosphere.hw.ca1.mesosphere.com descriptive text "checkpoint"
config.marathon._mesosphere.hw.ca1.mesosphere.com descriptive text "event_subscriber=http_callback"
config.marathon._mesosphere.hw.ca1.mesosphere.com descriptive text "framework_name=marathon"
config.marathon._mesosphere.hw.ca1.mesosphere.com descriptive text "task_launch_timeout=300000"
$ host -t txt config.mesos._mesosphere.hw.ca1.mesosphere.com
config.mesos._mesosphere.hw.ca1.mesosphere.com descriptive text "zk=zk://172.16.0.12:2181,172.16.0.13:2181,172.16.0.14:2181/mesos"
$ host -t txt config.mesos-master._mesosphere.hw.ca1.mesosphere.com
config.mesos-master._mesosphere.hw.ca1.mesosphere.com descriptive text "cluster=OVH1"
config.mesos-master._mesosphere.hw.ca1.mesosphere.com descriptive text "quorum=2"
config.mesos-master._mesosphere.hw.ca1.mesosphere.com descriptive text "work_dir=/hdd/mesos/master"
$ host -t txt config.mesos-slave._mesosphere.hw.ca1.mesosphere.com
config.mesos-slave._mesosphere.hw.ca1.mesosphere.com descriptive text "containerizers=docker,mesos"
config.mesos-slave._mesosphere.hw.ca1.mesosphere.com descriptive text "executor_registration_timeout=5mins"
config.mesos-slave._mesosphere.hw.ca1.mesosphere.com descriptive text "isolation=cgroups/cpu,cgroups/mem"
config.mesos-slave._mesosphere.hw.ca1.mesosphere.com descriptive text "work_dir=/hdd/mesos/slave"
$ host -t txt config.mesos-slave._mesosphere.srv2.hw.ca1.mesosphere.com
config.mesos-slave._mesosphere.srv2.hw.ca1.mesosphere.com descriptive text "hostname=srv2.hw.ca1.mesosphere.com"
$ host -t txt config.mesos-master._mesosphere.srv2.hw.ca1.mesosphere.com
config.mesos-master._mesosphere.srv2.hw.ca1.mesosphere.com descriptive text "hostname=srv2.hw.ca1.mesosphere.com"
$ host -t txt config.zookeeper._mesosphere.srv2.hw.ca1.mesosphere.com
config.zookeeper._mesosphere.srv2.hw.ca1.mesosphere.com descriptive text "myid=1"
$ host -t txt config.zookeeper._mesosphere.hw.ca1.mesosphere.com
config.zookeeper._mesosphere.hw.ca1.mesosphere.com descriptive text "clientPort=2181"
config.zookeeper._mesosphere.hw.ca1.mesosphere.com descriptive text "dataDir=/var/lib/zookeeper"
config.zookeeper._mesosphere.hw.ca1.mesosphere.com descriptive text "initLimit=10"
config.zookeeper._mesosphere.hw.ca1.mesosphere.com descriptive text "maxClientCnxns=60"
config.zookeeper._mesosphere.hw.ca1.mesosphere.com descriptive text "server.1=172.16.0.12:2888:3888"
config.zookeeper._mesosphere.hw.ca1.mesosphere.com descriptive text "server.2=172.16.0.13:2888:3888"
config.zookeeper._mesosphere.hw.ca1.mesosphere.com descriptive text "server.3=172.16.0.14:2888:3888"
config.zookeeper._mesosphere.hw.ca1.mesosphere.com descriptive text "syncLimit=5"
config.zookeeper._mesosphere.hw.ca1.mesosphere.com descriptive text "tickTime=2000"
```