DevopsVlogger

apiVersion: v1
kind: ReplicationController
metadata:
  name: webapp-rs
  labels:
    app: webapp

spec:
  template:
    metadata:

DevopsVlogger

apiVersion: apps/v1
kind: ReplicaSet
metadata:
  name: webapp-rs
  labels:
    app: webapp

spec:
  template:
    metadata:

DevopsVlogger

apiVersion: apps/v1
kind: Deployment
metadata:
  name: my-dep
  namespace: default
spec:
  replicas: 2
  strategy:
    type: RollingUpdate
    rollingUpdate:

DevopsVlogger

apiVersion: apps/v1
kind: Deployment
metadata:
  name: my-dep
  namespace: default
spec:
  replicas: 2
  selector:
    matchLabels:
      app: my-dep

DevopsVlogger

apiVersion: v1
kind: Service
metadata:
  name: mydep-service
spec:
  type: NodePort
  ports:
  - port: 8080         #service port
    targetPort: 8080   #Pod Port
    nodePort: 30088  #Node Port from the range - 30000-32767

DevopsVlogger

apiVersion: v1
kind: Pod
metadata:
   name: labels-demo-pod
   labels:
      app: front-end
      rel: dev
spec:
  containers:
  - name: httpd

DevopsVlogger

- name: Deploy a Web Application
  hosts: db_and_webserver1, db_and_webserver2
  tasks:
   - name: Install dependencies
     apt: name={{ item }} state=present
     with_items:
       - python
       - python-setuptools
       - python-dev
       - build-essential

DevopsVlogger

FROM ubuntu:16.04

RUN apt-get update && apt-get install -y openssh-server && apt-get install -y python python-setuptools python-dev build-essential python-pip
RUN mkdir /var/run/sshd
RUN echo 'root:Passw0rd' | chpasswd
RUN sed -i 's/#*PermitRootLogin prohibit-password/PermitRootLogin yes/g' /etc/ssh/sshd_config

# SSH login fix. Otherwise user is kicked off after login
RUN sed -i 's@session\s*required\s*pam_loginuid.so@session optional pam_loginuid.so@g' /etc/pam.d/sshd

DevopsVlogger

import os
from flask import Flask
from flaskext.mysql import MySQL      # For newer versions of flask-mysql 
# from flask.ext.mysql import MySQL   # For older versions of flask-mysql
app = Flask(__name__)

mysql = MySQL()

mysql_database_host = 'MYSQL_DATABASE_HOST' in os.environ and os.environ['MYSQL_DATABASE_HOST'] or  'localhost'

DevopsVlogger

KataContainers
- image coupled with kernel 
- light vm layer
- can run in nested virturalization environments if hardware supports and you can enable it in bios (ex. only bare metal EC2 instances, limits many cloud providers)
- slower startup time
- OCI compliant
- previously known as ClearContainers by Intel

gvisor
- kernel implemented in userspace