Docker on Docker
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This document discusses Docker Inc's transition to running their infrastructure on Docker EE (Docker Enterprise Edition). Some key points: - Previously Docker Inc ran their infrastructure (Docker Hub, Docker Store, etc) on a collection of Docker hosts managed imperatively without orchestration. - They transitioned to running everything on Docker EE for the benefits of declarative orchestration using Docker Swarm, access controls, and resource management. - The transition was done by changing the orchestration layer only, without changing applications, containers, logs, metrics, etc. This allowed them to gradually transition services to Docker EE. - Running as a customer of their own product has provided Docker Inc valuable insights into best practices, feature requests
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Deep Dive into Docker Swarm ModeAjeet Singh Raina Since its first 1.12 release on July 2016, Docker Swarm Mode has matured enough as a clustering and scheduling tool for IT administrators and developers who can easily establish and manage a cluster of Docker nodes as a single virtual system. Swarm mode integrates the orchestration capabilities of Docker Swarm into Docker Engine itself and help administrators and developers with the ability to add or subtract container iterations as computing demands change. With sophisticated but easy to implement features like built-in Service Discovery, Routing Mesh, Secrets, declarative service model, scaling of the services, desired state reconciliation, scheduling, filters, multi-host networking model, Load-Balancing, rolling updates etc. Docker 17.06 is all set for production-ready product today. Join me webinar organised by Docker Izmir, to get familiar with the current Swarm Mode capabilities & functionalities across the heterogeneous environments.
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Moby and Kubernetes entitlements Docker, Inc. The document proposes a new system called "entitlements" for defining high-level security profiles and permissions for containers. It would allow defining permissions profiles like "network.admin" instead of low-level options. Entitlements would be attached to container images to define their security properties. The goals are to improve the user experience, support a standard across platforms, and securely tie security profiles to images through signing. Implementation is still needed in Moby and Kubernetes. Feedback is welcomed on usability, default entitlements, and design.
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- 1. Docker on Docker Add picture here Brett Inman Infrastructure Engineer Marcus Martins Senior Manager - Orchestration Docker Inc Docker Inc
- 2. Docker on Docker ● Where we were ● How we moved to Docker EE ● What we learned ● How we’re making Docker EE better
- 3. SaaS at Docker ● Docker Hub ● Docker Store ● Docker Cloud > 1B pulls a month > 500K builds a month > 5000 requests / sec
- 4. Philosophy ● High Availability ● Self-healing ● Self-service ● Build it - own it
- 6. Previous Infrastructure Infra provides: ● Group of Docker Hosts per team ● Docker TLS Certs ● Centralized logging ● Centralized metrics ● Service discovery / routing
- 7. How dev used the old setup Dogfooding Docker since 2013
- 8. How dev used the old setup The good parts: ● Fully containerized ● Docker as the only interface ● No SSH access
- 9. How dev used the old setup The bad parts: ● Multiple deployments tools ● Imperative deployments
- 10. How dev used the old setup The bad parts: ● Hosts as pets ● Manual resource management
- 11. What was missing
- 12. Docker EE Add picture here ● Docker Swarm ● User Management ● Resource Access Control
- 13. How we did it
- 15. Focus Changed: ● Orchestration Did not change: ● Code ● Containers ● Logs ● Metrics ● Service Discovery ● Routing
- 17. Self-service transition ● Goal: give service teams control ● Use both deployments at will ● Swarmkit mesh networking - magic, but: ○ Hard cutover transition for us ○ Can’t pull metrics from individual containers
- 18. Our Routing ● Registrator ● Consul ● Consul-template ● Haproxy
- 19. Host Port Publishing --publish mode=host Enables classic engine behavior of exposing container port on host for Swarm services
- 20. Automation ● Bootstrap lock ● Discovery - Load balancer or tags
- 22. Resources Constraints Human is no longer the scheduler
- 24. Reservation = Limit docker service create --reserve-memory 640m --limit-memory 640m
- 25. System Reservation docker service create --name system-reservation --reserve-memory 1G --limit-memory 1G --mode global --init ubuntu sleep infinity
- 26. Cloud Permissions ● IAM is at host level - not container ● Each team gets an autoscaling group ● Leverage UCP Collections
- 28. Declarative version: '3.3' services: api: image: example/api:2.1.2 ports: - mode: host protocol: tcp target: 80 environment: DEBUG: False ENVIRONMENT: product ... ● Compose file ● Deploy with `docker stack deploy` ● All stacks defined in source control
- 29. Updates version: '3.2' services: api: image: example/api:2.1.2 deploy: replicas: 20 … update_config: delay: 10s parallelism: 2 order: stop-first max_failure_ratio: 0 failure_action: rollback ● Rolling updates ● Automated rollback
- 30. Access Control version: '3.2' services: api: image: example/api:2.1.2 deploy: replicas: 2 … labels: com.docker.ucp.access.label:/Api … ● Using Docker EE Collections
- 31. What’s better? Decouple host from application ● Host replacement ● Host failures ● Build it own it - developers don’t own hosts
- 32. Host Replacement Three touches: ● Ops ● Dev ● Ops
- 34. What else? ● Easy to scale application ● Standardization ● Docker-native
- 35. Where we are now
- 36. Now ● All of Docker SaaS is running on Docker EE ● 80 worker nodes ● 60 swarm services ● 1000 tasks ● Multiple deployments a day
- 38. Best Practices Topics including: ● Managing Resources ● Provisioning and Automation ● Logging and Monitoring Coming soon to success.docker.com
- 39. Product guidance ● In-house customer at scale in production ● Architecture ● 35+ feature requests ● Host port publishing ● More soon!
- 40. Canary ● Running every Docker EE Release Candidate ● 50+ bugs filed ● Customer Zero
- 41. Docker EE with Kubernetes in production
- 43. Docker EE Hosted Demo Add picture here docker.com/trial ● Free 4 Hour Demo ● No Servers Required ● Full Docker EE Cluster Access