devops-with-docker

Part 1

Exercise 1.1

$ docker ps -a
CONTAINER ID        IMAGE               COMMAND                  CREATED             STATUS                     PORTS               NAMES
bb27ea2a4484        nginx:alpine        "nginx -g 'daemon of…"   15 seconds ago      Exited (0) 5 seconds ago                       awesome_greider
a31a11ad3e12        nginx:alpine        "nginx -g 'daemon of…"   16 seconds ago      Exited (0) 9 seconds ago                       lucid_proskuriakova
1b10852465f7        nginx:alpine        "nginx -g 'daemon of…"   19 seconds ago      Up 18 seconds              80/tcp              compassionate_knuth

Exercise 1.2

$ docker ps -a
CONTAINER ID        IMAGE               COMMAND             CREATED          STATUS              PORTS               NAMES
$ docker images
REPOSITORY          TAG                 IMAGE ID            CREATED          SIZE

Exercise 1.3

$ docker run --rm -it ubuntu

# apt-get update && apt-get install -y curl
# sh -c 'read website; sleep 3; curl http://$website;'

Exercise 1.4

curler.sh:

#!/bin/sh
read website; sleep 3; curl http://$website;

Dockerfile:

FROM ubuntu
RUN apt-get update && apt-get install -y curl
WORKDIR /app
COPY curler.sh ./
CMD ["/app/curler.sh"]

How to run:

docker build -t curler 104
docker run --rm -it curler

Exercise 1.5

docker build -t devops-105 105
docker run --rm -p 5000:5000 devops-105

Exercise 1.6

docker build -t devops-106 106
docker run --rm -p 8000:8000 -v (pwd)/logs.txt:/app/logs.txt devops-106

Exercise 1.7

See exercises 1.5 and 1.6.

Exercise 1.8

docker run --rm -v (pwd)/108/logs.txt:/usr/app/logs.txt devopsdockeruh/first_volume_exercise

Exercise 1.9

docker run --rm -p 8080:80 devopsdockeruh/ports_exercise

Exercise 1.10

Dockerfile

Exercise 1.11

Dockerfile

docker build -t 111 .
docker run --rm -p 8000:8000 -v (pwd)/logs.txt:/app/logs.txt 111

Exercise 1.12

Frontend Dockerfile Backend Dockerfile

Exercise 1.13

Dockerfile

Exercise 1.14

Had to add SECRET_KEY_BASE environment variable to get the server running. Precompiled assets are not loaded but I think this is due to configuration / having to setup nginx to serve the assets.

Dockerfile

Exercise 1.15

Dockerfile Docker Hub

Exercise 1.16

Heroku

Part 2

Exercise 2.01

docker-compose.yml

Exercise 2.02

docker-compose.yml

Exercise 2.03

docker-compose.yml

Exercise 2.04

docker-compose up
docker-compose scale compute=3

Exercise 2.05

docker-compose.yml

Exercise 2.06

docker-compose.yml

Exercise 2.07

docker-compose.yml

Exercise 2.08

docker-compose.yml nginx.conf Dockerfile frontend Dockerfile backend

Exercise 2.09

docker-compose.yml

Exercise 2.10

Everything seems to be working already.

Part 3

Exercise 3.02

Dockerfile

Exercise 3.03

Dockerfile frontend Dockerfile backend