Sheng Yang ab63788557 Longhorn v1.0.1 release

i## Highlights:
1. [Make Longhorn Helm Chart directly available through Helm repo](https://github.com/longhorn/longhorn/issues/1043). Now the users can use `helm repo add longhorn https://charts.longhorn.io` to find and install Longhorn easily through Helm command line.
1. [NFS on Longhorn for RWX Access Mode (experimental)](https://github.com/longhorn/longhorn/issues/1183). We've provided a way to add Longhorn backed NFS provisioner to the cluster, so now user can use `longhorn-nfs` StorageClass to provision RWX volumes. Note: currently NFS provisioner is not highly available. If the node NFS provisioner running is down, the workload using RWX volume might be interrupted for a couple of minutes before restoring the service. Check [here](https://staging.longhorn.io/docs/1.0.0/advanced-resources/rwx-workloads/) for details.
1. Improved Air Gap Environment Support. Check [here](https://staging.longhorn.io/docs/1.0.0/advanced-resources/deploy/airgap/) for updated document for air gap installation.
    1. [Remove the air gap image name length limitation](https://github.com/longhorn/longhorn/issues/1323).
    1. [Change the default image pull policy from `Always` to `IfNotPresent`](https://github.com/longhorn/longhorn/issues/1491)
    1. [Aggregate the necessary Docker images](https://github.com/longhorn/longhorn/issues/1419)
    1. [HTTP/HTTPS_PROXY support for S3 backupstore](https://github.com/longhorn/longhorn/issues/1540)
1. [Support PriorityClass for Longhorn deployment](https://github.com/longhorn/longhorn/issues/1487). Check [here](https://staging.longhorn.io/docs/1.0.0/advanced-resources/deploy/priority-class/) for details.

Live upgrade from v1.0.0 to v1.0.1 is supported.

Signed-off-by: Sheng Yang <sheng.yang@rancher.com>

2020-07-20 20:25:13 -07:00

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Longhorn

Build Status

Engine:
Instance Manager:
Manager:
UI:
Test:

Overview

Longhorn is a distributed block storage system for Kubernetes.

Longhorn is lightweight, reliable, and powerful. You can install Longhorn on an existing Kubernetes cluster with one kubectl apply command or using Helm charts. Once Longhorn is installed, it adds persistent volume support to the Kubernetes cluster.

Longhorn implements distributed block storage using containers and microservices. Longhorn creates a dedicated storage controller for each block device volume and synchronously replicates the volume across multiple replicas stored on multiple nodes. The storage controller and replicas are themselves orchestrated using Kubernetes. Here are some notable features of Longhorn:

Enterprise-grade distributed storage with no single point of failure
Incremental snapshot of block storage
Backup to secondary storage (NFSv4 or S3-compatible object storage) built on efficient change block detection
Recurring snapshot and backup
Automated non-disruptive upgrade. You can upgrade the entire Longhorn software stack without disrupting running volumes!
Intuitive GUI dashboard

You can read more technical details of Longhorn here.

Current status

The latest release of Longhorn is v1.0.1.

Source code

Longhorn is 100% open source software. Project source code is spread across a number of repos:

Longhorn engine -- Core controller/replica logic https://github.com/longhorn/longhorn-engine
Longhorn manager -- Longhorn orchestration https://github.com/longhorn/longhorn-manager
Longhorn UI -- Dashboard https://github.com/longhorn/longhorn-ui

Requirements

For the installation requirements, refer to the Longhorn documentation.

Install

Longhorn can be installed on a Kubernetes cluster in several ways:

Documentation

The official Longhorn documentation is here.

Community

Longhorn is an open source software, so contribution are greatly welcome. Please read Code of Conduct and Contributing Guideline before contributing.

Contributing code is not the only way of contributing. We value feedbacks very much and many of the Longhorn features are originated from users' feedback. If you have any feedbacks, feel free to file an issue and talk to the developers at the CNCF #longhorn slack channel.

License

Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at

http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.

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