Docker & rancher
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- Docker allows for OS-level virtualization of applications into lightweight isolated containers. Docker Hub is used to store and distribute Docker images. - Rancher provides tools for orchestrating Docker containers across multiple hosts. The Rancher Catalog allows deploying Dockerized applications in a standardized way using templates that prompt for configurable options. - The document discusses using Docker and Rancher together to build, deploy, manage and scale containerized applications both on a single host and across multiple hosts for production use.
![Custom Docker Image: Dockerifle
FROM plone:5.1.5
RUN apt-get update
&& apt-get install -y --no-install-recommends libldap2-dev libssl-dev
&& rm -rf /var/lib/apt/lists/*
COPY site.cfg /plone/instance/
COPY docker-entrypoint.sh
RUN gosu plone buildout -c site.cfg
HEALTHCHECK --interval=1m --timeout=5s --start-period=1m
CMD curl -f http://localhost:8080/ || exit 1
ENTRYPOINT [“/plone/instance/docker-entrypoint.sh”]](https://image.slidesharecdn.com/dockerrancher-190226182524/85/Docker-amp-rancher-5-320.jpg)
Docker & rancher
- 1. Alin Voinea Eau de Web, Romania Docker & Rancher Docker Hub, Rancher Catalog
- 2. Summary ● Docker ○ Docker Hub ● Rancher ○ Rancher Catalog
- 3. What is Docker? ● OS level virtualization - “containerization” ● First released in 2013 - Solomon Hykes - dotCloud ● Maintained and and developed by Docker Inc. ● Lightweight than virtual machines ● Single operating-system kernel ● Portable ● Scalable ● Stackable
- 4. Running Applications w/ Docker $ docker run plone:5 $ docker run eeacms/eionet:5.1-1.0 $ docker run registry.gitlab.com/avoinea/docker:3.5
- 5. Custom Docker Image: Dockerifle FROM plone:5.1.5 RUN apt-get update && apt-get install -y --no-install-recommends libldap2-dev libssl-dev && rm -rf /var/lib/apt/lists/* COPY site.cfg /plone/instance/ COPY docker-entrypoint.sh RUN gosu plone buildout -c site.cfg HEALTHCHECK --interval=1m --timeout=5s --start-period=1m CMD curl -f http://localhost:8080/ || exit 1 ENTRYPOINT [“/plone/instance/docker-entrypoint.sh”]
- 6. Custom Docker Image: docker-entrypoint.sh #!/bin/bash set -e # Make sure that the application can write within data volume chown -R plone:plone /data # Move the main application to `PID 1` by using `exec` # Use a non-root user to start your app exec gosu plone bin/instance "$@"
- 7. Build Docker Image: devel $ docker build -t eionet-dev /path/to/Dockerfile $ docker run -p 8080:8080 eionet-dev
- 8. Build Docker Image: production $ docker push eeacms/eionet $ git tag 5.1-1.0 $ git push --tags
- 9. $ docker-compose up $ docker-compose down $ docker-compose down -v Orchestration: Single host
- 10. $ docker-compose up -d $ docker-compose scale plone=3 version: "2" services: plone: image: eeacms/eionet:5.1-1.0 environment: - ZEO_ADDRESS=zeo:8100 zeo: image: plone:5.1.5 command: zeoserver volumes: - data:/data volumes: data: driver: local Orchestration: docker-compose docker-compose.yml
- 12. version: "2" services: plone: scale: 2 health_check: healthy_threshold: 2 response_timeout: 2000 port: 8080 unhealthy_threshold: 3 interval: 5000 strategy: recreate request_line: GET / zeo: scale: 1 health_check: ... version: "2" services: plone: mem_reservation: 1g mem_limit: 2g labels: io.rancher.scheduler.affinity:host_label: backend=yes io.rancher.scheduler.affinity:host_label_ne: reserved=yes io.rancher.scheduler.affinity:container_label_soft_ne: io.rancher.stack_service.name=$${stack_name}/$${service_name} eu.europa.eionet.plone: true … volumes: data: driver: rancher-ebs / netapp / rancher-nfs / local driver-opts: size: 1g volumeType: gp2 docker-compose.yml rancher-compose.yml Orchestration: rancher-compose
- 13. version: "2" catalog: name: "Eionet - WWW" description: "Eionet Plone 5 website" version: "5.1-1.0" questions: - variable: "HOST_LABELS" label: "Do not schedule services on these hosts" description: "List of host labels” type: "string" required: true default: "reserved=yes" - variable: "TZ" ... version: "2" services: plone: labels: io.rancher.scheduler.affinity:host_label_ne: ${HOST_LABELS} … volumes: data: driver: ${DATA_VOLUME_DRIVER} driver-opts: {{.Values.DATA_VOLUME_DRIVER_OPTS}} docker-compose.yml rancher-compose.yml Rancher Catalog
- 14. $ rancher catalog ls $ rancher catalog install --name www-eionet-demo --answers /path/to/answers.txt EEA:www-eionet:1 Rancher Catalog: CLI & Web UI
- 16. Rancher Catalog: Upgrades & Roll-back
- 17. Rancher Load Balancer ● Service rules ● Selector rules
- 18. Thank you! ● EEA Rancher Catalog: ○ github.com/eea/eea.rancher.catalog ● Documentation ○ docker.com ○ rancher.com ● Examples ○ github.com/eea?q=docker