Docker for Frontend Engineers

In this (internal) workshop, I led a session to familiarize a group of frontend engineers with Docker.

This version of the workshop was held at Royal Schiphol Group in October 2017.

Transcript

2. Let's talk about Docker
3. Docker History • 1979: Unix V7
4. Docker History • 1974: Matijs born • 1979: Unix V7 • 2001: Linux VServer • 2008: Linux Containers (LXC) • 2013: Docker ⚠ learn more: dcmnt.me/2hjIl5V
5. • lightweight virtual environment • faster startup than virtual machines • focus is on "do one thing, well"
6. What Docker is not • not good at running multiple processes • not suitable for all kinds of applications • not (very) good at distributed stateful applications
7. What is Docker used for?
8. What is Docker used for? ⚠ learn more: dcmnt.me/2hjIl5V
10. Docker Basics OS Download URL dcmnt.me/2hmxGYm dcmnt.me/2hmtbgp
12. Docker Basics • Docker Runtime • Docker Images
13. Docker Runtime
14. Docker Runtime
15. Docker Images • Tarball of OS and application • built from a Dockerfile • can use Docker Compose, Packer, Ansible etc.
16. Dockerfiles • plain-text files with little magic
17. Dockerfiles • plain-text files with little magic • contain instructions on how a Docker Image should be built
18. FROM alpine CMD ["echo", "Hello ✈ "] ⚠ learn more: dcmnt.me/2hkSoHQ
20. FROM alpine CMD ["echo", "Hello ✈ "]
21. FROM alpine CMD ["echo", "Hello ✈ "]
22. FROM withmethod/alpine-base:3.6 RUN apk add --no-cache nodejs=6.10.3-r1 nodejs-npm=6.10.3-r1
23. FROM withmethod/alpine-base:3.6 RUN \ apk \ add \ --no-cache \ nodejs=6.10.3-r1 \ nodejs-npm=6.10.3-r1
24. FROM withmethod/alpine-base:3.6 ENV IMAGE_VERSION=6.10.3-r1 RUN \ apk \ add \ --no-cache \ nodejs=${IMAGE_VERSION} \ nodejs-npm=${IMAGE_VERSION}
25. FROM withmethod/alpine-nodejs:6.10.3-r1 ENV IMAGE_NAME=loop-and-crash ENV IMAGE_VERSION=1.4.3 ENV WORKDIR=/tmp WORKDIR "${WORKDIR}" ADD "https://github.com/withmethod/${IMAGE_NAME}/archive/${IMAGE_VERSION}.tar.gz" "${WORKDIR}" RUN \ tar xzf "${IMAGE_VERSION}.tar.gz" \ && \ rm -rf "${WORKDIR}/${IMAGE_VERSION}.tar.gz" WORKDIR "${WORKDIR}/${IMAGE_NAME}-${IMAGE_VERSION}" RUN npm install --production USER "alpine" EXPOSE 2774 CMD ["npm", "start"]
26. FROM withmethod/alpine-nodejs:6.10.3-r1 ENV IMAGE_NAME=loop-and-crash ENV IMAGE_VERSION=1.4.3 ENV WORKDIR=/tmp WORKDIR "${WORKDIR}" ADD "https://github.com/withmethod/${IMAGE_NAME}/archive/${IMAGE_VERSION}.tar.gz" "${WORKDIR}" RUN \ tar xzf "${IMAGE_VERSION}.tar.gz" \ && \ rm -rf "${WORKDIR}/${IMAGE_VERSION}.tar.gz" WORKDIR "${WORKDIR}/${IMAGE_NAME}-${IMAGE_VERSION}" RUN npm install --production USER "alpine" EXPOSE 2774 CMD ["npm", "start"]
27. FROM withmethod/alpine-nodejs:6.10.3-r1 ENV IMAGE_NAME=loop-and-crash ENV IMAGE_VERSION=1.4.3 ENV WORKDIR=/tmp WORKDIR "${WORKDIR}" ADD "https://github.com/withmethod/${IMAGE_NAME}/archive/${IMAGE_VERSION}.tar.gz" "${WORKDIR}" RUN \ tar xzf "${IMAGE_VERSION}.tar.gz" \ && \ rm -rf "${WORKDIR}/${IMAGE_VERSION}.tar.gz" WORKDIR "${WORKDIR}/${IMAGE_NAME}-${IMAGE_VERSION}" RUN npm install --production USER "alpine" EXPOSE 2774 CMD ["npm", "start"]
28. FROM withmethod/alpine-nodejs:6.10.3-r1 ENV IMAGE_NAME=loop-and-crash ENV IMAGE_VERSION=1.4.3 ENV WORKDIR=/tmp WORKDIR "${WORKDIR}" ADD "https://github.com/withmethod/${IMAGE_NAME}/archive/${IMAGE_VERSION}.tar.gz" "${WORKDIR}" RUN \ tar xzf "${IMAGE_VERSION}.tar.gz" \ && \ rm -rf "${WORKDIR}/${IMAGE_VERSION}.tar.gz" WORKDIR "${WORKDIR}/${IMAGE_NAME}-${IMAGE_VERSION}" RUN npm install --production USER "alpine" EXPOSE 2774 CMD ["npm", "start"]
29. FROM withmethod/alpine-nodejs:6.10.3-r1 ENV IMAGE_NAME=loop-and-crash ENV IMAGE_VERSION=1.4.3 ENV WORKDIR=/tmp WORKDIR "${WORKDIR}" ADD "https://github.com/withmethod/${IMAGE_NAME}/archive/${IMAGE_VERSION}.tar.gz" "${WORKDIR}" RUN \ tar xzf "${IMAGE_VERSION}.tar.gz" \ && \ rm -rf "${WORKDIR}/${IMAGE_VERSION}.tar.gz" WORKDIR "${WORKDIR}/${IMAGE_NAME}-${IMAGE_VERSION}" RUN npm install --production USER "alpine" EXPOSE 2774 CMD ["npm", "start"]
30. FROM withmethod/alpine-nodejs:6.10.3-r1 ENV IMAGE_NAME=loop-and-crash ENV IMAGE_VERSION=1.4.3 ENV WORKDIR=/tmp WORKDIR "${WORKDIR}" ADD "https://github.com/withmethod/${IMAGE_NAME}/archive/${IMAGE_VERSION}.tar.gz" "${WORKDIR}" RUN \ tar xzf "${IMAGE_VERSION}.tar.gz" \ && \ rm -rf "${WORKDIR}/${IMAGE_VERSION}.tar.gz" WORKDIR "${WORKDIR}/${IMAGE_NAME}-${IMAGE_VERSION}" RUN npm install --production USER "alpine" EXPOSE 2774 CMD ["npm", "start"]
32. Building Images • docker build . • docker build --file single-line.Dockerfile . ⚠ learn more: dcmnt.me/2zOHtNn
33. Pulling Images • docker pull alpine ⚠ learn more: dcmnt.me/2hkr1xO
34. Running Images • docker run $containerName $command • docker run alpine /bin/echo "Hello " ⚠ learn more: dcmnt.me/2zOdR2Q
35. Running Images • docker run $containerId • docker run a125 ⚠ learn more: dcmnt.me/2zOdR2Q
36. Running Images • docker run $containerName • docker run busybox echo "Hello " ⚠ learn more: dcmnt.me/2zOdR2Q
37. Listing Images • docker images
38. Listing Images docker \ run \ --name portainer \ --privileged \ --detach \ -p 9000:9000 \ -v /var/run/docker.sock:/var/run/docker.sock \ -v ~/Sites/docker-data/portainer/:/data \ portainer/portainer \ --no-auth \ -H unix:///var/run/docker.sock ⚠ learn more: dcmnt.me/2zOdrtm
40. Takeaways • Containers are not new but require different thinking • Docker Images work best when they are minimal • Do not overcomplicate your image's build instructions • Security is hard, so ask around for best-practices
41. Handout dcmnt.me/2zOkcva