Elara Introduction Wentao Zhang? (NOTE: PASTE IN PORTRAIT AND SEND BEHIND FOREGROUND GRAPHIC FOR CROP)

About Me Seven Years Work Experience: , Ericsson. 14-Now, 2012 Lab department, Huawei Company. Skills: Familiar with Docker platform Familiar with Openstack storage. Good at Linux Platform Software Development. Familiar with Linux Kernel development.

Agenda Why Elara Local Storage vs Shared Storage Why Elara What is Elara New Features of Elara Architecture Status Management Elara Scenario Backend driver Support Storage Interface

Elara Introduction A docker Volume plugin

A Glimpse of Elara

A Docker Volume Plugin A Distributed Volume Management Tool A Connection between Container and Shared Storage Provider Rich of volume operations. A Glimpse of Elara Storage Pool … Elara docker Elara docker

Why Elara?

Local Storage vs Shared Storage Local Storage – Data stores in Local machine. – Migration is difficult and cost high – Server crash hard to recover data. – Docker graphic driver Shared Storage – Persistent Storage for Docker – Easy to support Container Migration – Like openstack (cinder, manila, Swift), ceph… migration Host A Host B copy Glad to useShared Storage by Plugins in containers!

Elara come up Focus on large container cloud distribution. Node Management (domain) Auto-deploy Focus on shared storage only. Meet all the requirement from Docker data volume storage. Run on Huawei Storage Device and the Devices from other manufactory. Why Elara Docker Volume Status Docker and lots of Plugins Supports Local Volume. Local Storage. Local Database. Lack of volume operation interface. Snapshot operation Qos(IOPS and disk quota, resize..) No resource Scheduler(!)

What is Elara?

New Features of Elara Node management Status stored remotely in credible storage. Focus on shared storage Advanced operations on volumes Multiple backend driver Resource scheduler(!)

Architecture KV storage as database. Container migration Support snapshot, backup, migration, Support Qos like IPOS, disk quota, extend volume. Suport bckend driver extention Focus on shared storage only

Status Management Elara node status management K-v storage Each node registered All Status stored remotely All nodes Equal K-V Storage Node info Volume Status Elara …

Elara Scenario The connection between Container and shared storage. Cover all the North Interfaces for Docker

Backend driver Filesystem & Block Device NFS, Cinder, DJ as backend easy to extend Difference opaque to user Driver + Instance concept Block Device Driver Volume Manager Driver Interface FileSystem Driver Cinder Huawei DJ SAN NFS Driver NAS Manila

Support Storage Interface Management Interface: – Volume Operation Create Volume Delete Volume – Snapshot & Backup Create snapshot Delete snapshot Restore volume from snapshot – Oos: IPOS. Extend Volume. Disk Quota. Data Plane: – Volume Resource Pool Provide muti-backends to virtual Pool, maybe several physical volume make up one virtual pool. – Volume Scheduler Load Backend, scheduler – Volume Transfer Migration and backup the data volume.

Demo

A glance for Elara. Elara Openstack show. Node Status. Volume operation. Snapshot operation. Elara Show Openstack show

Thank you!

(NOTE: PASTE IN PHOTO AND SEND BEHIND FOREGROUND GRAPHIC FOR CROP) Docker origin Volume Interface Docker Volume Plugin Docker Volume Interface

Docker Supported Volume operation docker run –v /xx/volume:/data niginx:web_server Kubernets distributed volumes Kubernetes has many backends Do not support volume plugin K8S Master Host A Docker Storage kubelet Volume Container Volume

Docker Volume Plugin Basic knowledge – Defined by community – Plugin Discovery(config) APIs – VolumeDriver.Active – VolumeDriver.Create – VolumeDriver.Remove – VolumeDriver.Mount – VolumeDriver.Path – VolumeDriver.Umount – VolumeDriver.Get – VolumeDriver.List

Elara Volume Work Flow 1.Create Volume request from docker, elara, kubelete.. 2.Docker Daemon send Volume Plugin API to Elara daemon 3.Elara daemon access database (etcd), 4.Elara send request to backend storage 5.Backend storage will create a volume. 6.Elara send attach command to attach volume to host. 7.Storage backend will use protocol (like iscsi) to attach it to the host. Host will scan this volume. 8.Elara will format this volume and mkfs for it, and mount to a path and send to docker to use it. Host A Docker Daemon Elara Daemon ETCD Docker Client Elara Client Backend Storage /dev/vdx volume

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