Pods @ Container Meetup Tokyo

by Ian Lewis

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Docker & Pods The many forms of containers

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Confidential & Proprietary Google Cloud Platform 2 Ian Lewis Developer Advocate - Google Cloud Platform Tokyo, Japan google.com/+IanLewis-hoge @IanMLewis

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Confidential & Proprietary Google Cloud Platform 3 What are containers?

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Confidential & Proprietary Google Cloud Platform 4 1. Linux cgroup 2. Linux Namespace a. IPC b. Network (eth & IP address) c. Mount d. PID e. User f. UTS (Hostname & NIS) Containers

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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 Container Image File System Metadata

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Confidential & Proprietary Google Cloud Platform 6 docker run nginx

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Google Cloud Platform Docker Containers IPC Network PID Hostname Mount nginx IPC Network PID Hostname Mount nginx IPC Network PID Hostname Mount nginx

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Google Cloud Platform IPC Network PID Hostname Mounts nginx IPC Network PID Hostname Mount git pull IPC Network PID Hostname Mount nginx Docker Containers

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Google Cloud Platform IPC Network PID Hostname Mounts nginx IPC Network PID Hostname Mount git pull IPC Network PID Hostname Mount nginx Docker Containers VOLUME VOLUME Host Volume

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Google Cloud Platform IPC Network PID Hostname IPC Network PID Hostname Mount git pull IPC Network PID Hostname Mount nginx Docker Containers nginx Host Volume

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Google Cloud Platform Pods & Docker? confd nginx HUP W RITE READ etcd CHANGE nginx.conf app app app IP Address LB

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Google Cloud Platform Container Container Pods & Docker? confd nginx HUP W RITE READ etcd CHANGE ? ? ? ?

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Google Cloud Platform Pods & Docker? Container nginx confd foreman

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Google Cloud Platform Container foreman Pods & Docker? nginx confd

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Google Cloud Platform Container foreman Pods & Docker? Everything’s A-OK!! nginx confd Crash-Restart Loop

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Kubernetes κυβερνήτης: Greek for “pilot” or “helmsman of a ship” the open source cluster manager from Google

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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

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Google Cloud Platform Pods & Docker? confd nginx HUP W RITE READ etcd CHANGE nginx.conf app app app IP Address LB

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Google Cloud Platform IPC Network Pods docker … --net=container:id --ipc=container:id Hostname cgroup Web Server Pod cgroup File Puller localhost

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Google Cloud Platform Pods (TODO) docker … --net=container:id --ipc=container:id --pid=container:id https://github.com/docker /docker/issues/10163 IPC Network PID Hostname cgroup Web Server cgroup File Puller localhost

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Thank you! Thanks! Ian Lewis twitter.com/IanMLewis