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BOSH Release for VM fine tuning

The purpose of this release is provide a way to fine tune and customize a VM.

Capabilities of the jobs:

  • users job manages the users on the server. It allows defining several public keys, the password, uid, ssh and sudo access, shell, the profile and a way to disable a user.
  • sysctl manages the sys settings on the system, starting the job will apply the new settings defined on the properties and stopping will restore the orginal settings on the system.
  • scheduler defines udev rules to manage the IO scheduler, global default or per device
  • resolvconf job manages domain, search and options for the dns resolver. See resolv.conf manual to define the options.
  • login_banner manages the content of the file /etc/issue.net. There are some variables predefined you can use in the text.
  • hosts manages static dns entries defined in /etc/hosts

Usage

Example manifest with job properties:

  jobs:
  - name: sysctl
    release: vm-tuning
    properties:
      sysctl:
        config:
        - name: enable-ipv6
          index: 70
          config: |
            # undo BOSH's stemcell's IPv6 lockdowns
            # 10-ipv6-privacy.conf
            net.ipv6.conf.all.use_tempaddr = 0
            net.ipv6.conf.default.use_tempaddr = 0
            # 60-bosh-sysctl.conf
            net.ipv6.conf.all.accept_ra=1
            net.ipv6.conf.default.accept_ra=1
            net.ipv6.conf.all.disable_ipv6=0
            net.ipv6.conf.default.disable_ipv6=0
            net.ipv6.conf.default.accept_redirects=1
            net.ipv6.conf.all.accept_redirects=1
            net.ipv6.route.flush=0
  - name: hosts
    release: vm-tuning
    properties: {}
      hosts:
        "192.168.1.10": ['fqdn.domain.com', 'alias', 'name'] 
        "fe00::0": []
  - name: resolvconf
    release: vm-tuning
    properties:
      resolvconf:
        search: local springer.com
        options:
        - "timeout:3"
        - "attempts:1"
  - name: scheduler
    release: vm-tuning
    properties:
      scheduler:
        default: noop
        devices:
        - name: sdb
          scheduler: cfq
  - name: users
    release: vm-tuning
    properties:
      users:
      - name: jriguera
        uid: 1010
        disable: false
        sudo: true
        ssh: true
        public_key:
         - ssh-rsa AAAA .... kna jriguera@thinkpad
  - name: login_banner
    release: vm-tuning
    properties:
      login_banner:
        text: |
          This server is managed by Bosh Director
           ___ ___
          | _ \ __|   It's PE,
          |  _/ _|      baby!
          |_| |___|             [email protected]
          
          # $JOB_FULL on $DEPLOYMENT_NAME

Development

Steps to build a new release:

git clone https://github.com/SpringerPE/vm-tuning-boshrelease.git
cd vm-tuning-boshrelease
bosh target BOSH_HOST
bosh create release --force && bosh upload release

Final releases

In order to publish a final release, you can run ./bosh_final_release for:

  • Upload all blobs to the public S3 bucket (and set them to public)
  • Create a final Bosh release (increasing the version number)
  • Upload and publish the new boshrelease tgz file in GitHub releases section, so you can point it directly in the manifest file (sha1 checksum is also calculated)
  • Pushes and commits the changes to git

After that, you can also, upload the new release to bosh director bosh upload release

Author

Based on https://github.com/cloudfoundry/os-conf-release

Springer Nature Platform Engineering, Jose Riguera

Copyright 2017 Springer Nature

License

MIT License