manics

kubeadm cloudinit

Setup a single node Kubernetes cluster for development using kubeadm: https://kubernetes.io/docs/setup/independent/install-kubeadm/

Create a CentOS 7 or Ubuntu Xenial (16.04) machine, and run kubeadm.sh as root.

You can pass this script as user-data to cloud-init so that it will be automatically run. For example, on openstack:

openstack server create NAME --flavor FLAVOR --key-name KEY --image 'Ubuntu Xenial' --network NET --security-group SECGROUP --user-data kubeadm.sh

davewongillies

Supported built-in functions

• abs(float) - Returns the absolute value of a given float. Example: abs(1) returns 1, and abs(-1) would also return 1, whereas abs(-3.14) would return 3.14. See also the signum function.

• basename(path) - Returns the last element of a path.

• base64decode(string) - Given a base64-encoded string, decodes it and returns the original string.

ipedrazas

kubectl get pods | grep Evicted | awk '{print $1}' | xargs kubectl delete pod

ahawkins

{{- $stage := .Values.stage }}
{{- range $pod := .Values.topology.pods }}
---
apiVersion: extensions/v1beta1
kind: Deployment
metadata:
  name: '{{ template "fullname" $ }}-{{ $pod.name | replace "_" "-" }}-{{ $pod.tier }}'
  labels:
    release: "{{ $.Release.Name }}"
    chart: '{{ $.Chart.Name }}-{{ $.Chart.Version | replace "+" "-" }}'

mcastelino

Summary

• dnsmasq front ends the requests and sends them on to kube-dns

  dnsmasq
    --cache-size=1000
    --no-resolv
    --server=127.0.0.1#10053
  

--log-facility=-

GLMeece

Latency Comparison Numbers

Note: "Forked" from Latency Numbers Every Programmer Should Know

Event	Nanoseconds	Microseconds	Milliseconds	Comparison
L1 cache reference	0.5	-	-	-
Branch mispredict	5.0	-	-	-
L2 cache reference	7.0	-	-	14x L1 cache
Mutex lock/unlock	25.0	-	-	-

arsdehnel

resource "aws_iam_policy" "terraform_create_policy" {
    name = "terraform_create_policy"
    path = "/"
    policy = "${data.aws_iam_policy_document.terraform_create_policy.json}"
}

data "aws_iam_policy_document" "terraform_create_policy" {
    statement {
        sid = "1"
        actions = [

clemlatz

1. Configure server: Nginx

Create the certificate:

$ sudo openssl req -x509 -nodes -days 365 -newkey rsa:2048 -keyout /etc/ssl/private/nginx-selfsigned.key -out /etc/ssl/certs/nginx-selfsigned.crt

Create a strong Diffie-Hellman group:

$ sudo openssl dhparam -out /etc/ssl/certs/dhparam.pem 2048

so0k

Kubectl output options

Let's look at some basic kubectl output options.

Our intention is to list nodes (with their AWS InstanceId) and Pods (sorted by node).

We can start with:

kubectl get no

tillkuhn

---
################################################################################
## K8S Default Backend for Nginx if no endpoint is available e.g. 404 servers
###############################################################################
apiVersion: extensions/v1beta1
kind: Deployment
metadata:
  name: nginx-default-backend
  namespace: kube-system
  labels: