DevOps

• Why SaltStack 2016 - http://ryandlane.com/blog/2014/08/04/moving-away-from-puppet-saltstack-or-ansible/

Tools

1. Kubernetes (See below)

2. kaniko - container builder - gcr.io/kaniko-project/executor

Kubernetes

• Info YouTube

• Google, pod docker/container manager
• Labels
• Node
• Pods - one or more containers, share network name space, pods expose single IP for all containers.

• Reconciliation loop -> Driver current state to expected state.

  • Create, Delete, Monitor, Replication

• Service -> discover dynamic - long lived. uses selector to match labels and proxy's

  • Fake IP and DNS available in single pod.
• Network Model
  • Load balancer/proxy between every layer in the application.
    • Handles service discovery with fixed IP.
• Kubernetes infrastructure

  • CoreOs

  • Docker / Rocket
    • Docker generates dynamic IP.
      • Kubernetes node launches infrastructure container first on Docker, to get IP and report back.

  • etcd - user raft protocol, for highly available key value store.

  • flannel
  • Kubernetes controller (etcd webservice exposure, scheduler, replication controller)
  • Kubernetes node (kubelet, watch controller, and update status, talks to container e.g. docker)
  • Terraform
  • Google Compute Engine.

• etcd

...