Local Storage Module

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Introduction

Local Storage is one of modules of HwameiStor which is a cloud native local storage system. it aims to provision high performance persistent LVM volume with local access to applications.

Support local volume kinds: LVM.

Support disk types: HDD, SSD, NVMe.

Architecture of HwameiStor

Features and Roadmap

This Roadmap provides information about local-storage releases, as well as feature tracking.

Use Cases

HwameiStor provisions two kind of local volumes, LVM and Disk. As a component of HwameiStor, Local Storage provisions two types of local LVM volumes, HA and non-HA.

For the non-HA local LVM volume, it's the best data persistent solution for the following use cases:

• Database with HA capability, such as MongoDB, etc..
• Messaging system with HA capability, such as Kafka, RabbitMQ, etc..
• Key-value store with HA capability, such as Redis, etc..
• Others with HA capability

For the HA local LVM volume, it's the best data persistent solution for the following use cases:

• Database, such as MySQL, PostgreSQL etc..
• Other applications which requires the data HA feature.

Usage With Helm Chart

Local Storage must work with Local Disk Manager module. It's suggested to install by helm-charts

Usage With Independent Installation

Developer can start using local-storage With independent-installation， This is for developing or test, and will deploy local-storage from github repo. Please install the Local Disk Manager firstly.

Glossary

• LocalDisk LDM abstracts disk resources into objects in k8s. A LocalDisk (LD) resource object represents the disk resources on the host..
• LocalDiskClaim The way to use disk, users can add a description of the disk to select the disk to be used..
• LocalVolume LocalVolume is a logical concept in the system, with control node management..
• LocalVolumeReplica The LocalVolumeReplica resource is created by a control node when creating or updating the Volume.The LocalVolumeReplica is assigned to the specified node that creates / manages the local storage (e.g. LV) based on its content, and maintains it in real-time..
• LocalStorageNode Each node should create its own Node CRD resource and proactively maintain and update relevant information..

Feedbacks

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