Docker & Pods

Transcript

1. Docker & Pods The many forms of containers
2. Confidential & Proprietary Google Cloud Platform 2 Ian Lewis Developer Advocate - Google Cloud Platform Tokyo, Japan google.com/+IanLewis-hoge @IanMLewis
4. Confidential & Proprietary Google Cloud Platform 4 What are containers?
5. Confidential & Proprietary Google Cloud Platform 5 1. Linux cgroup 2. Linux Namespace a. IPC b. Network (eth & IP address) c. Mount d. PID e. User f. UTS (Hostname & NIS) Containers
6. Confidential & Proprietary Google Cloud Platform 6 1. Linux cgroup 2. Linux Namespace a. IPC b. Network (eth & IP address) c. Mount d. PID e. User f. UTS (Hostname & NIS) Containers Container Image File System Metadata
7. Confidential & Proprietary Google Cloud Platform 7 docker run nginx
8. Google Cloud Platform Docker Containers IPC Network PID Hostname Mount nginx IPC Network PID Hostname Mount nginx IPC Network PID Hostname Mount nginx
9. Google Cloud Platform IPC Network PID Hostname Mounts nginx IPC Network PID Hostname Mount git pull IPC Network PID Hostname Mount nginx Docker Containers
10. Google Cloud Platform IPC Network PID Hostname IPC Network PID Hostname Mount git pull IPC Network PID Hostname Mount nginx VOLUME Docker Containers nginx
11. Copyright 2015 Google Inc Container Cluster Management Node Node Cluster Node
12. Copyright 2015 Google Inc Container Cluster Management Node Node Node VOLUME?? VOLUME?? Cluster
13. Copyright 2015 Google Inc Container Cluster Management Node VOLUME
14. Copyright 2015 Google Inc Container Cluster Management Node NFS NFS NAS
15. Copyright 2015 Google Inc Node Container Cluster Management Node N FS N FS NAS
16. Google Cloud Platform Pods & Docker? confd nginx HUP W RITE READ etcd CHANGE nginx.conf app app app IP Address LB
17. Google Cloud Platform Container Container Pods & Docker? confd nginx HUP W RITE READ etcd CHANGE ? ? ? ?
18. Google Cloud Platform Pods & Docker? Container nginx confd foreman
19. Google Cloud Platform Container foreman Pods & Docker? nginx confd
20. Google Cloud Platform Container foreman Pods & Docker? Everything’s A-OK!! nginx confd Crash-Restart Loop
21. Copyright 2015 Google Inc Google has been running all of it’s services in containers for about 10 years. We start about 2 billion containers per week. Images by Connie Zhou
22. Confidential & Proprietary Google Cloud Platform 22 http://research.google.com/pubs/pub43438.html
23. http://research.google.com/pubs/pub43438.html
24. Image by Connie Zhou
25. job hello_world = { runtime = { cell = 'ic' } // Cell (cluster) to run in binary = '.../hello_world_webserver' // Program to run args = { port = '%port%' } // Command line parameters requirements = { // Resource requirements ram = 100M disk = 100M cpu = 0.1 } replicas = 5 // Number of tasks } 10000 Developer View
26. Hello world! Hello world! Hello world! Hello world! Hello world! Hello world! Hello world! Hello world! Hello world! Hello world! Hello world! Hello world! Hello world! Hello world! Hello world! Hello world! Hello world! Hello world! Hello world! Hello world! Hello world! Hello world! Hello world! Hello world! Hello world! Hello world! Hello world! Image by Connie Zhou Hello world! Hello world! Hello world! Hello world! Hello world! Hello world! Hello world! Hello world! Hello world! Hello world! Hello world! Hello world! Hello world! Hello world! Hello world! Hello world! Hello world! Hello world! Hello world! Hello world! Hello world! Hello world! Hello world! Hello world!
27. Kubernetes κυβερνήτης: Greek for “pilot” or “helmsman of a ship” the open source cluster manager from Google
28. Google Cloud Platform Pods Small group of containers & volumes Tightly coupled The atom of scheduling & placement Shared namespace • share IP address & localhost • share IPC, etc. Managed lifecycle • bound to a node, restart in place • can die, cannot be reborn with same ID Example: data puller & web server Consumers Content Manager File Puller Web Server Volume Pod
29. Google Cloud Platform Pods & Docker? confd nginx HUP W RITE READ etcd CHANGE nginx.conf app app app IP Address LB
30. Google Cloud Platform IPC Network Pods docker … --net=container: id --ipc=container:id Hostname cgroup Web Server Pod cgroup File Puller localhost
31. Google Cloud Platform Pods (TODO) docker … --net=container: id --ipc=container:id -- pid=container:id https://github. com/docker/docker/issue s/10163 IPC Network PID Hostname cgroup Web Server cgroup File Puller localhost
32. Kubernetes Master/Scheduler Cluster: Execution Environment Machine Host Machine Host Machine Host Machine Host Machine Host Machine Host Machine Host Container Agent Container Agent Container Agent Container Agent Container Agent Container Agent Container Agent Node
33. Log Roller Web Server Machine Host Machine Host Machine Host Machine Host Machine Host Machine Host Machine Host Container Agent Container Agent Container Agent Container Agent Container Agent Container Agent Container Agent Kubernetes Master/Scheduler Pods Container Container Pod
34. FE FE FE FE FE FE BE BE BE BE BE BE BE BE BE Machine Host Machine Host Machine Host Machine Host Machine Host Machine Host Machine Host Container Agent Container Agent Container Agent Container Agent Container Agent Container Agent Container Agent Kubernetes - Master/Scheduler How to differentiate multiple pods?
35. labels: role: frontend FE FE FE FE FE FE BE BE BE BE BE BE BE BE BE Machine Host Machine Host Machine Host Machine Host Machine Host Machine Host Machine Host Container Agent Container Agent Container Agent Container Agent Container Agent Container Agent Container Agent Kubernetes - Master/Scheduler Labels
36. labels: role: frontend stage: production Machine Host Machine Host Machine Host Machine Host Machine Host Machine Host Machine Host Container Agent Container Agent Container Agent Container Agent Container Agent Container Agent Container Agent Kubernetes - Master/Scheduler FE FE FE FE FE FE BE BE BE BE BE BE BE BE BE Labels
37. FE FE FE FE replicas: 4 template: ... labels: role: frontend stage: production Machine Host Machine Host Machine Host Machine Host Machine Host Machine Host Machine Host Container Agent Container Agent Container Agent Container Agent Container Agent Container Agent Container Agent Kubernetes - Master/Scheduler Replication Controller: Managing Many Pods
38. FE replicas: 1 template: ... labels: role: frontend stage: production Machine Host Machine Host Machine Host Machine Host Machine Host Machine Host Machine Host Container Agent Container Agent Container Agent Container Agent Container Agent Container Agent Container Agent Kubernetes - Master/Scheduler Replication Controller: Scaling FE FE FE
39. FE FE FE replicas: 3 template: ... labels: role: frontend stage: production Machine Host Machine Host Machine Host Machine Host Machine Host Machine Host Machine Host Container Agent Container Agent Container Agent Container Agent Container Agent Container Agent Container Agent Kubernetes - Master/Scheduler Replication Controller: Scaling
40. Thank you! Thanks! Ian Lewis twitter.com/IanMLewis