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Kube-ovn | ||
# Kube-OVN | ||
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kube-ovn is a Kubernetes network plugin on top of OVN. | ||
Kube-OVN is an advanced Kubernetes network fabric designed for Enterprise container network management. | ||
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Roadmap: http://confluence.alaudatech.com/pages/viewpage.action?pageId=30868972 | ||
Technical Detail: http://confluence.alaudatech.com/pages/viewpage.action?pageId=36871817 | ||
## Primary Features | ||
- **Namespaced Subnet Allocation**: Each namespace can has a unique subnet(backend by a vswitch) to allocated pod ip. Multiple namespaces can also share a same subnet. | ||
- **Subnet Isolation**: Control which address can visit a specific subnet. | ||
- **Static IP Address for Workload**: Allocate random or static IP addresses to workloads just as you wish. | ||
- **Dynamic QoS**: Modify pod ingress/egress traffic rate on the fly. | ||
- **Embedded Loadbalancer**: Replace kube-proxy by ovn embedded distributed L2 Loadbalancer. | ||
- **Distributed Gateway**: Every node can act as a gateway to provide external network connectivity. | ||
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## Features on The Way | ||
- **Namespaced Gateway** | ||
- **Direct External Connectivity** | ||
- **ACL Based Network Policy** | ||
- **Policy based QoS** | ||
- **More Metrics and Traffic Graph** | ||
- **More Diagnose and Tracing Tools** | ||
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## Quick Start | ||
Kube-OVN is easy to use and has a quick out of box installation. Please refer to [Installation](docs/install.md). | ||
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## Documents | ||
- [Namespaced Subnet](docs/subnet.md) | ||
- [Subnet Isolation](docs/isolation.md) | ||
- [Static IP](docs/static-ip.md) | ||
- [Dynamic QoS](docs/qos.md) | ||
- [Policy Routing Gateway](docs/policy-gateway.md) | ||
- [Direct External Connectivity](docs/direct-connect.md) | ||
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## !!Cautions!! | ||
Kube-OVN is still in early stage and heavy development. Please *DO NOT* use it in production!! | ||
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## Contact | ||
Mail: mengxin#alauda.io | ||
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WeChat: liumengxinfly |
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# Installation | ||
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Kube-OVN includes two parts: | ||
- Native OVS and OVN | ||
- Controller and CNI plugins that combine OVN and Kubernetes | ||
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## Steps | ||
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1. Add label to node which will deploy the ovn db and ovn central control plan | ||
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`kubectl label node <node to deploy ovn db> kube-ovn/role=master` | ||
2. Install native OVS and OVN | ||
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`kubectl apply -f https://raw.githubusercontent.com/alauda/kube-ovn/master/yamls/ovn.yaml` | ||
3. Install Controller and CNI plugins | ||
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`kubectl apply -f https://raw.githubusercontent.com/alauda/kube-ovn/master/yamls/kube-ovn.yaml` | ||
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That's all! You can try to create pod and test connectivity. | ||
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## More Configuration | ||
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### Controller Configuration | ||
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```bash | ||
--default-cidr: Default cidr for namespace with no logical switch annotation, default: 10.16.0.0/16 | ||
--node-switch-cidr: The cidr for node switch. Default: 100.64.0.0/16 | ||
``` |
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# Subnet Isolation | ||
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Kube-OVN supports subnet isolation and access control by modifying annotation of namespace. | ||
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Use following keys to modify isolation policy: | ||
- `ovn.kubernetes.io/private`: boolean, control whether ip outside this subnet can access this subnet. Default: false. | ||
- `ovn.kubernetes.io/allow`: strings of cidr separated by comma, control which address can visit this subnet, if private=true. | ||
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Example: | ||
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```bash | ||
apiVersion: v1 | ||
kind: Namespace | ||
metadata: | ||
annotations: | ||
ovn.kubernetes.io/cidr: 10.17.0.0/16 | ||
ovn.kubernetes.io/gateway: 10.17.0.1 | ||
ovn.kubernetes.io/logical_switch: ovn-subnet | ||
ovn.kubernetes.io/exclude_ips: 10.17.0.0..10.17.0.10 | ||
ovn.kubernetes.io/private: "true" | ||
ovn.kubernetes.io/allow: 10.17.0.0/16,10.18.0.0/16 | ||
name: ovn-subnet | ||
``` |
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# QoS | ||
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Kube-OVN supports dynamically change ingress and egress traffic rate control by modifying annotation to pod spec. | ||
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Use following keys to define qos: | ||
- `ovn.kubernetes.io/ingress_rate`: traffic rate that inbound pod, unit Mbit/s | ||
- `ovn.kubernetes.io/egress_rate`: traffic rate that outbound pod, unit Mbit/s | ||
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Example: | ||
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```bash | ||
apiVersion: v1 | ||
kind: Pod | ||
metadata: | ||
name: qos | ||
namespace: ls1 | ||
annotations: | ||
ovn.kubernetes.io/ingress_rate: "3" | ||
ovn.kubernetes.io/egress_rate: "1" | ||
spec: | ||
containers: | ||
- name: qos | ||
image: nginx:alpine | ||
``` |
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