DevOps Workflow. From 0 to kube in 60 min. Christian Kniep, v Technical Account Manager, Docker Inc.

Transcription

1 DevOps Workflow From 0 to kube in 60 min Christian Kniep, v Technical Account Manager, Docker Inc.

2 Motivation Iteration barriers

3 Works on my Laptop! Why is DevOps not enough. Laptop Cluster Development Experiment Prod DevOps Dev Artifact: code Env: interactive Ops Artifact: pkg/img Env: automated Development Experiment Release/Integration Prod DevRelOps Dev Artifact: code Env: interactive Release Artifact: pkg/img Env: automated Ops Artifact: pkg/img Env: automated DevRel*Ops Development Experiment Dev Artifact: code Env: interactive Release/Integration Release Artifact: pkg/img Env: automated Q&A Performance Prod Ops Artifact: pkg/img Env: automated

4 Build, Ship & Run Where Run == Orchestrate Build the image: Dockerfile + context -> Docker Image Ship the image using a (private) Docker Registry Orchestrate the Image: docker-compose.yml For the developer the orchestration should be transparent and out of scope. Artifacts are: 1. Dockerfile + context (git repository) 2. docker-compose.yml (git repository)

5 Application Containerization Portability, Reproducibility As a developer I want to work on a webapp for DockerCon EU, which represents a simple three tier stack. web: JS app I am working on words: API serving business logic db: Database backend api web api db

6 Prerequisite for Workshop Docker Desktop - Docker4Mac / Docker4Win edge-channel (provides kubernetes) - DockerCE for Linux Git Repository git clone git@github.com:christiankniep/k8s-wordsmith-demo.git cd k8s-wordsmith-demo.git git checkout -b update/container_to_kube docker-compose pull cd swarmprom ; docker-compose pull

7 #1 Building the Image(s) First Step as a Developer

8 docker-compose build $ export TAG=$(date +%s) $ docker-compose build WARNING: Some services (api) use the 'deploy' key, which will be ignored. Building web Step 1/12 : FROM golang:1.9.1-alpine3.6 as builder *snip* Successfully tagged qnib/k8s-wordsmith-web: Building api *snip* Successfully tagged qnib/k8s-wordsmith-api: Building db *snip* Successfully tagged qnib/k8s-wordsmith-db:

9 #2 Simple Container One-shot Orchestration

10 docker-compose build $ docker-compose up WARNING: Some services (api) use the 'deploy' key, which will be ignored. Creating network "k8swordsmithdemo_default" with the default driver Creating k8swordsmithdemo_web_1... done Creating k8swordsmithdemo_api_1... done Creating k8swordsmithdemo_db_1... done Attaching to k8swordsmithdemo_db_1, k8swordsmithdemo_api_1, k8swordsmithdemo_web_1 db_1 The files belonging to this database system will be owned by user "postgres". db_1 This user must also own the server process.

11 #3 Deploying Stack in SWARM Simple yet Powerful Orchestration

12 SWARM at a Glance Easy to understand and reason about

13 Deploy Auxiliary Stack to Monitor SWARM Fork of: $ cd swarmprom $ docker stack deploy -c docker-compose.yml prom Creating network prom_net Creating config prom_service_rules Creating config prom_node_name Creating config prom_caddy_config Creating config prom_dockerd_config Creating config prom_node_rules Creating config prom_task_rules Creating service prom_caddy Creating service prom_dockerd-exporter Creating service prom_cadvisor Creating service prom_grafana Creating service prom_node-exporter Creating service prom_prometheus

14 Docker stack deploy Using the Docker SWARM API $ docker stack deploy -c docker-compose.yml words Ignoring unsupported options: build Creating network words_default Creating service words_web Creating service words_db Creating service words_api $ docker service ls --format="{{.name}}\t{{.replicas}}\t{{.image}}\t{{.ports}}" words_api 5/5 qnib/k8s-wordsmith-api: words_db 1/1 qnib/k8s-wordsmith-db: words_web 1/1 qnib/k8s-wordsmith-web: *:8080->80/tcp $ $ docker stack deploy -c docker-compose.yml words #2>dev/null Updating service words_web (id: fv7z1lryqmysxhzobdjrbgecl) image qnib/k8s-wordsmith-web: could not be accessed on a registry to record its digest. Each node will access qnib/k8s-wordsmith-web: independently, possibly leading to different nodes running different versions of the image.

15 #4 Deploying Stack in Kubernetes Using CustomResourceDefinitions

16 Docker stack deploy #2 Using the docker-crd within Kube $ docker stack rm words Removing service words_api Removing service words_db Removing service words_web Removing network words_default $ export DOCKER_ORCHESTRATOR=kubernetes $ docker stack deploy -c docker-compose.yml words Stack words was created Waiting for the stack to be stable and running... - Service api has one container running - Service db has one container running - Service web has one container running Stack words is stable and running $

17 #5 Deploying Stack in Kubernetes Using Kubernetes Object Files

18 Kubectl deploy #2 Using the kubectl CLI $ export DOCKER_ORCHESTRATOR=kubernetes $ kubectl apply -f. deployment "kube-api" created service "kube-api" created deployment "kube-db" created service "kube-db" created deployment "kube-web" created service "kube-web" created $

19 THANK YOU :)