Lean & mean applications using Docker EE and golang
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The document discusses the use of multi-stage builds in Docker to optimize application images, highlighting features like selective artifact copying and smaller production-ready images. It also covers orchestration concepts using Docker Swarm for managing mixed Windows and Linux container clusters, emphasizing security and efficiency. Key takeaways include the ease of clustering applications and the benefits of minimal images for security and resource management.
Lean & mean applications using Docker EE and golang
- 1. Lean & Mean Application stack using Docker EE, Golang & Multi Stage builds Anoop Kumar | [email protected] Solution Architect, Docker Inc @anooplive
- 2. Today • Multi Stage builds in Docker • Orchestration Concepts • Demo
- 3. Docker is a Platform
- 5. Multi-Stage Builds OPTIMIZE IMAGES FOR MORE EFFICIENT RESOURCE UTILIZATION build App.go App.go Stage 1 Stage 2 293 MB 11.6 MB KEY FEATURES BENEFITS • Use multiple FROM statements to define stages • Selectively copy artifacts from one stage to another • Create thinner images, optimized for production without manual tuning • Accelerate image pulls and deployment time while also improving resource efficiency in both the registry and resulting containers
- 8. Managing Swarm Nodes $ docker swarm init $ docker swarm join-token worker|manager $ docker swarm join $ docker node ls $ docker node inspect $ docker swarm leave $ docker node remove
- 9. UNIFORMLY OPERATE, MANAGE, AND SECURE WINDOWS AND LINUX CONTAINERS Node Manager Node Worker Node Manager Node Manager Node Worker Node Worker Node Worker Worker Nodes docker universal control plane trusted registry KEY FEATURES BENEFITS • Extend enterprise security features like image signing, image scanning, and secrets management to both Windows and Linux worker nodes • Leverage the same LDAP/AD integration and RBAC rules across Windows and Linux nodes • Visualize all apps in the same environment • Improve resource utilization and incur less management overhead with centralized management across Windows and Linux apps • Reduce risk with enforced processes and policies that are consistent across Windows & Linux apps Mixed Windows and Linux Clusters
- 10. Services • A service represents a single unique component of an application. • Composed of one or more tasks • Created in docker cli, compose, and UCP
- 11. Docker Tasks: Atomic Unit of Orchestration
- 13. 13 Publish Mode: Host vs Ingress Docker host 2task2.myservice Docker host 1task1.myservice Docker host 3 IPVS IPVS IPVS Ingress network 8080 8080 “mynet” overlay network LB 8080 Docker host 2 Docker host 1task1.myservice Docker host 3 bridge LB bridge task3.myservice bridge 8080 8080
- 14. Stacks • A Stack is a collection of services making up an application. • Define a stack using a compose yaml file. • Manage stacks using cli or Docker EE UI.
- 15. Demo Application ● 3 tier - Web (Caddy), application tier logic, redis db ● App tier (tracks hits to each container) ○ Written in Golang ○ Using ONBUILD & statically linked binary ● Accounts for environmental differences ● Graceful exits on SIGTERM ● Custom hostnames ● Deployable on Docker4M/W, Docker EE & PWD ● One click deploy
- 16. > demo
- 17. Key Takeaways • Clustering applications in Docker is easy • Docker swarm is secure (TLS) by default • Minimal images offer higher security, better efficiency and low technical debt
- 18. Next Steps THE CALL TO ACTION • Docker Labs | dockr.ly/labs • | Oct 16-19 Copenhagen • | dockr.ly/2yLY7h5 GetDockerCertified