elsonrodriguez

Quick and Dirty Single Node Kubernetes Setup.

Preq-reqs:

• You need a node
• Your node's OS should be Linux
• It should be a good Linux distro (Ubuntu 15.10)
• Not a bad one
• It should have Docker running
• It should be disposable
• It shouldn't have been previously traumatized

elsonrodriguez

Intro

This is the formula for terminating k8s nodes that have a bad kubelet. This effectively fences nodes that are unable to unmount/detach their own storage.

Caveats

Early testing shows that this may not work if a node is rebooted in response to a kubelet/system issue. Therefore the action taken in response to a problem on a kubernetes node MUST BE to terminate it.

Overview

Make LB like this:

 "HealthCheck": {

elsonrodriguez

Summarizing 16 Failures:

[Fail] [k8s.io] EmptyDir volumes [It] should support (non-root,0777,default) [Conformance] 
/Users/eorodrig/oss/kubernetes-elsonrodriguez/_output/local/go/src/k8s.io/kubernetes/test/e2e/framework/util.go:1617

[Fail] [k8s.io] EmptyDir volumes [It] should support (root,0644,tmpfs) [Conformance] 
/Users/eorodrig/oss/kubernetes-elsonrodriguez/_output/local/go/src/k8s.io/kubernetes/test/e2e/framework/util.go:1617

[Fail] [k8s.io] EmptyDir volumes [It] volume on default medium should have the correct mode [Conformance] 
/Users/eorodrig/oss/kubernetes-elsonrodriguez/_output/local/go/src/k8s.io/kubernetes/test/e2e/framework/util.go:1617

elsonrodriguez

Course Prerequisites

• Local (No VM) terminal with working bash and curl (for Windows users, gitbash or cygwin can accomplish this).
• Windows, Linux, OSX
• Slack

Installing kubectl, the Kubernetes client

First create directories for this class:

elsonrodriguez

Summarizing 20 Failures:

[Fail] [k8s.io] ConfigMap [It] should be consumable from pods in volume as non-root [Conformance] 
/Users/elsonrodriguez/oss/kubernetes-elsonrodriguez/_output/local/go/src/k8s.io/kubernetes/test/e2e/framework/util.go:1620

[Fail] [k8s.io] EmptyDir volumes [It] should support (non-root,0777,default) [Conformance] 
/Users/elsonrodriguez/oss/kubernetes-elsonrodriguez/_output/local/go/src/k8s.io/kubernetes/test/e2e/framework/util.go:1620

[Fail] [k8s.io] EmptyDir volumes [It] should support (root,0644,tmpfs) [Conformance] 
/Users/elsonrodriguez/oss/kubernetes-elsonrodriguez/_output/local/go/src/k8s.io/kubernetes/test/e2e/framework/util.go:1620

elsonrodriguez

{
  "metadata": {
    "name": "pachyderm",
    "creationTimestamp": null,
    "labels": {
      "app": "",
      "suite": "pachyderm"
    }
  },
  "secrets": null,

elsonrodriguez

---
kind: DaemonSet
apiVersion: extensions/v1beta1
metadata:
  labels:
    app: ceph
    daemon: mon
  name: ceph-mon
  namespace: ceph
spec:

elsonrodriguez

apiVersion: apps/v1alpha1
kind: PetSet
metadata:
  labels:
    name: mongo
  name: mongo
spec:
  replicas: 1
  serviceName: mongo
  volumeClaimTemplates:

elsonrodriguez

apiVersion: extensions/v1beta1
kind: Deployment
metadata:
  name: flink-jobmanager
  labels:
    app: flink-jobmanager 
spec:
  replicas: 1
  template:
    metadata:

elsonrodriguez

##This grabs what should be the only interface's ip address.
#set ip_suffix = $interfaces.itervalues().next()['ip_address'].split(".",2)[2]
[Service]
ExecStart=
ExecStart=/usr/bin/docker daemon -H fd:// --bip=10.$ip_suffix.1/24 --storage-driver=overlay