Salt – A Scalable Systems Management Solution for Datacenters Open Source Data Center Conference April 26-28, 2016 Sebastian Meyer Linux Consultant & Trainer B1 Systems GmbH meyer@b1-systems.de B1 Systems GmbH - Linux/Open Source Consulting, Training, Support & Development
Introducing B1 Systems founded in 2004 operating both nationally and internationally nearly 100 employees provider for IBM, SUSE, Oracle & HP vendor-independent (hardware and software) focus: consulting support development training operations solutions B1 Systems GmbH Salt – Scalable Systems Management 2 / 47
Areas of Expertise B1 Systems GmbH Salt – Scalable Systems Management 3 / 47
Salt – Introduction B1 Systems GmbH Salt – Scalable Systems Management 4 / 47
Yet Another Systems Management Solution? takes inspiration from Puppet, Chef or Ansible focuses on the entire system life cycle easily scalable to a few thousand systems convenient and easy to learn configuration management and remote execution B1 Systems GmbH Salt – Scalable Systems Management 5 / 47
Salt – Concept B1 Systems GmbH Salt – Scalable Systems Management 6 / 47
Master & Minions B1 Systems GmbH Salt – Scalable Systems Management 7 / 47
Scalability: Masters, Syndics & Minions B1 Systems GmbH Salt – Scalable Systems Management 8 / 47
High Availability: Multiple Masters& Minions B1 Systems GmbH Salt – Scalable Systems Management 9 / 47
Salt Modes minions pull from master master pushes to Minions minions apply states locally master applies states on minions via SSH B1 Systems GmbH Salt – Scalable Systems Management 10 / 47
Remote Execution System B1 Systems GmbH Salt – Scalable Systems Management 11 / 47
Salt Command B1 Systems GmbH Salt – Scalable Systems Management 12 / 47
Grains B1 Systems GmbH Salt – Scalable Systems Management 13 / 47
Configuration Management B1 Systems GmbH Salt – Scalable Systems Management 14 / 47
States ID: module.function: - name: name - argument1: value - argument2: - value1 - value2 B1 Systems GmbH Salt – Scalable Systems Management 15 / 47
Top File base: all servers: ’*’: monitoring - monitoring ssh config - ssh syslog - syslog servers in LAN: ’*lan*’: ntp config - ntp.lan servers in DMZ: ’*dmz*’: ntp config - ntp.dmz firewall - firewall B1 Systems GmbH Salt – Scalable Systems Management 16 / 47
Pillars B1 Systems GmbH Salt – Scalable Systems Management 17 / 47
Pillar Data Pillar Example ntp: {% if grains[’id’].startswith(’myntpserver’) %} ntpservers: ["0.us.pool.ntp.org","1.us.pool.ntp.org"] comment: ’’ {% else %} ntpservers: ["10.1.1.20","10.1.1.21"] comment: ’myinternalservers’ {% endif %} Source: https://github.com/saltstack-formulas/ntp-formula/blob/master/pillar.example B1 Systems GmbH Salt – Scalable Systems Management 18 / 47
Pillars and States Pillar top.sls base: States top.sls ’*’: base: - monitoring ’*’: - ssh - monitoring - syslog - ssh - syslog ’*lan*’: - ntp - ntp.lan ’*dmz*’: ’*dmz*’: - firewall - ntp.dmz - firewall B1 Systems GmbH Salt – Scalable Systems Management 19 / 47
Deploying the State Master pushes to minions salt ’*’ state.highstate salt ’*’ state.sls mystate Minions pull from master salt-call state.highstate salt-call state.sls mystate B1 Systems GmbH Salt – Scalable Systems Management 20 / 47
Reusing States: Formulas reusing existing code roughly the same as Puppet modules/Ansible roles collection of States and files github.com/saltstack-formulas/ for "official" formulas B1 Systems GmbH Salt – Scalable Systems Management 21 / 47
Using Formulas directly from VCS or local extendable via include configurable via Pillar data variables mapped via Jinja map requirements across Formulas possible B1 Systems GmbH Salt – Scalable Systems Management 22 / 47
Demo B1 Systems GmbH Salt – Scalable Systems Management 23 / 47
Returners salt ’*’ disk.usage --return redis_return B1 Systems GmbH Salt – Scalable Systems Management 24 / 47
Salts Event Driven Infrastructure B1 Systems GmbH Salt – Scalable Systems Management 25 / 47
Overview actions trigger events events are communicated via the event bus reactors execute trigger actions responding to events B1 Systems GmbH Salt – Scalable Systems Management 26 / 47
Event Bus B1 Systems GmbH Salt – Scalable Systems Management 27 / 47
Actions & Events master# salt ’salt-minion-01’ disk.percent /srv salt-minion-01: 11% B1 Systems GmbH Salt – Scalable Systems Management 28 / 47
Actions & Events 20160422163250339970 { [...] } salt/job/20160422163250339970/new { "_stamp": "2016-04-22T14:32:50.340357", "arg": [ "/srv" ], "fun": "disk.percent", "jid": "20160422163250339970", "minions": [ "salt-minion-01" ], "tgt": "salt-minion-01", "tgt_type": "glob", "user": "root" } B1 Systems GmbH Salt – Scalable Systems Management 29 / 47
Actions & Events salt/job/20160422163250339970/ret/salt-minion-01 { "_stamp": "2016-04-22T14:32:50.536877", "cmd": "_return", "fun": "disk.percent", "fun_args": [ "/srv" ], "id": "salt-minion-01", "jid": "20160422163250339970", "retcode": 0, "return": "11%", "success": true } B1 Systems GmbH Salt – Scalable Systems Management 30 / 47
Events in a State b1/mystate/status/update: event.send: - data: status: "Installation done!" B1 Systems GmbH Salt – Scalable Systems Management 31 / 47
Beacons hook into system on minion create events inotify, diskusage, load, journald ... B1 Systems GmbH Salt – Scalable Systems Management 32 / 47
Beacons - Example inotify Beacon beacons: inotify: /etc/motd: mask: - modify B1 Systems GmbH Salt – Scalable Systems Management 33 / 47
Reactors B1 Systems GmbH Salt – Scalable Systems Management 34 / 47
Calling Reactors on Events Reactor Example reactor: - ’salt/minion/*/start’: - /srv/reactor/start.sls - ’b1/mystate/status/*’: - salt://reactor/status.sls B1 Systems GmbH Salt – Scalable Systems Management 35 / 47
Demo B1 Systems GmbH Salt – Scalable Systems Management 36 / 47
Use Cases? load-balancing job automation alerting B1 Systems GmbH Salt – Scalable Systems Management 37 / 47
Salt Cloud B1 Systems GmbH Salt – Scalable Systems Management 38 / 47
Overview B1 Systems GmbH Salt – Scalable Systems Management 39 / 47
Providers Amazon EC2 Provider Example my-ec2: driver: ec2 id: ’MYEC2ID’ key: ’adsfrf453fMYKEYasdsadg43’ private_key: /etc/salt/my_key.pem keyname: my_key securitygroup: default minion: master: saltmaster.example.com B1 Systems GmbH Salt – Scalable Systems Management 40 / 47
Profiles profile name provider image or template options for the instance minion options B1 Systems GmbH Salt – Scalable Systems Management 41 / 47
Profiles LXC Profile Example myfancyprofile: provider: lxc-host01 lxc_profile: template: ubuntu options: release: trusty password: test123 B1 Systems GmbH Salt – Scalable Systems Management 42 / 47
Maps Mapfile profile1: - instance_name_1 - instance_name_2 profile2: - instance_name_3: grains: mykey: myvalue - instance_name_4 Execute Mapfile salt-cloud -m /path/to/mapfile B1 Systems GmbH Salt – Scalable Systems Management 43 / 47
Bootstrapping a New Salt Environment Mapfile profile1: - instance_name_1: make_master: True minion: master: myoldmaster local_master: True - instance_name_2 - instance_name_3 - instance_name_4 ... B1 Systems GmbH Salt – Scalable Systems Management 44 / 47
Saltify Existing Machines 1/2 Saltify Provider saltify-all-machines: driver: saltify minion: master: mysaltmaster Saltify Profile salt-machine: provider: saltify-all-machines ssh_username: root key_filename: ’/etc/salt/pki/master/ssh/salt-ssh.rsa’ B1 Systems GmbH Salt – Scalable Systems Management 45 / 47
Saltify Existing Machines 2/2 Mapfile salt-machine: - first-machine: ssh_host: 1.2.3.4 - second-machine: ssh_host: 1.2.3.5 - third-machine: ssh_host: 1.2.3.6 B1 Systems GmbH Salt – Scalable Systems Management 46 / 47
Thank You! For more information, refer to info@b1-systems.de or +49 (0)8457 - 931096 B1 Systems GmbH - Linux/Open Source Consulting, Training, Support & Development
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