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# Features covered in each CNI-Genie version: | ||
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## Existing features | ||
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**Feature 1: CNI-Genie "Multiple CNI Plugins"** | ||
* Interface Connector to 3rd party CNI-Plugins. The user can [manually select one of the multiple CNI plugins](multiple-cni-plugins/README.md) | ||
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**Feature 2: CNI-Genie "Multiple IP Addresses"** | ||
* Injects multiple IPs to a single container. The container is reachable using any of the [multiple IP Addresses](multiple-ips/README.md) | ||
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**Feature 3: CNI-Genie "Network Attachment Definition"** | ||
* [Network Attachment Definition](network-attachment-definitions/README.md) feature incorporates Kubernetes Network Custom Resource Definition De-facto Standard in CNI-Genie | ||
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**Feature 4: CNI-Genie "Smart CNI Plugin Selection"** | ||
* Intelligence in selecting the CNI plugin. CNI-Genie [watches the KPI of interest and selects](smart-cni-genie/README.md) the CNI plugin, accordingly | ||
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**Feature 5: CNI-Genie "Default Plugin Selection"** | ||
* Support to set default plugin of user choice to be used for all the pods being created | ||
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**Feature 6: CNI-Genie "Network Isolation"** | ||
* Dedicated 'physical' network for a tenant | ||
* Isolated 'logical' networks for different tenants on a shared 'physical'network | ||
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## Future features | ||
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**Feature 7: CNI-Genie "Network Policy Engine"** | ||
* [CNI-Genie network policy engine](network-policy/README.md) allows for network level ACLs | ||
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**Feature 8: CNI-Genie "Real-time Network Switching"** | ||
* Price minimization: dynamically switching workload to a cheaper network as network prices change | ||
* Maximizing network utilization: dynamically switching workload to the less congested network at a threshold | ||
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# Getting started | ||
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### Prerequisite | ||
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* Linux box with | ||
* We tested on Ubuntu 14.04 & 16.04 | ||
* Docker installed | ||
* Kubernetes cluster running with CNI enabled | ||
* One easy way to bring up a cluster is to use [kubeadm](https://kubernetes.io/docs/getting-started-guides/kubeadm/): | ||
* We tested on Kubernetes 1.5, 1.6, 1.7, 1.8 | ||
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Till 1.7 version: | ||
``` | ||
$ kubeadm init --use-kubernetes-version=v1.7.0 --pod-network-cidr=10.244.0.0/16 | ||
``` | ||
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Version 1.8 onwards: | ||
``` | ||
$ kubeadm init --pod-network-cidr=10.244.0.0/16 | ||
``` | ||
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Next steps: | ||
``` | ||
$ mkdir -p $HOME/.kube | ||
$ sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config | ||
$ sudo chown $(id -u):$(id -g) $HOME/.kube/config | ||
``` | ||
* To schedule pods on the master, e.g. for a single-machine Kubernetes cluster, | ||
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Till 1.7 version, run: | ||
``` | ||
$ kubectl taint nodes --all dedicated- | ||
``` | ||
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Version 1.8 onwards, run: | ||
``` | ||
$ kubectl taint nodes --all node-role.kubernetes.io/master- | ||
``` | ||
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* One (or more) CNI plugin(s) installed, e.g., Calico, Weave, Flannel | ||
* Use this [link](https://docs.projectcalico.org/v3.2/getting-started/kubernetes) to install Calico | ||
* Use this [link](https://www.weave.works/docs/net/latest/kube-addon/) to install Weave | ||
* Use this [link](https://github.com/coreos/flannel/blob/master/Documentation/kube-flannel.yml) to install Flannel | ||
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### Installing genie | ||
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We install genie as a Docker Container on every node | ||
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Till Kubernetes 1.7 version: | ||
``` | ||
$ kubectl apply -f https://raw.githubusercontent.com/Huawei-PaaS/CNI-Genie/master/conf/1.5/genie.yaml | ||
``` | ||
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Kubernetes 1.8 version onwards: | ||
``` | ||
$ kubectl apply -f https://raw.githubusercontent.com/Huawei-PaaS/CNI-Genie/master/releases/v3.0/genie.yaml | ||
``` | ||
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### Building, Testing, Making changes to source code | ||
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Refer to our [Developer's Guide](developer-guide.md) section. | ||
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### Genie Logs | ||
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For now Genie logs are stored in /var/log/syslog | ||
To see the logs: | ||
``` | ||
$ cat /dev/null > /var/log/syslog | ||
$ tail -f /var/log/syslog | grep 'CNI' | ||
``` | ||
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### Troubleshooting | ||
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* Note: one a single node cluster, after your Kubernetes master is initialized successfully, make sure you are able to schedule pods on the master by running: | ||
``` | ||
$ kubectl taint nodes --all node-role.kubernetes.io/master- | ||
``` | ||
* Note: most plugins use differenet installation files for Kuberenetes 1.5, 1.6, 1.7 & 1.8. Make sure you use the right one! |
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# CNI-Genie | ||
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CNI-Genie enables container orchestrators ([Kubernetes](https://github.com/kubernetes/kubernetes), [Mesos](https://mesosphere.com/)) to seamlessly connect to the choice of CNI plugins installed on a host, including | ||
1. ['reference' CNI plugins](https://github.com/containernetworking/plugins), e.g., bridge, macvlan, ipvlan, loopback | ||
2. '3rd-party' CNI plugins, e.g., ([Calico](https://github.com/projectcalico/calico), [Romana](https://github.com/romana/romana), [Weave-net](https://github.com/weaveworks/weave)) | ||
3. 'specialized' CNI plugins, e.g., [SR-IOV](https://github.com/hustcat/sriov-cni), DPDK (work-in-progress) | ||
4. any generic CNI plugin of choice installed on the host | ||
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Without CNI-Genie, the orchestrator is bound to only a single CNI plugin. E.g., for the case of Kubernetes, without CNI-Genie, kubelet is bound to only a single CNI plugin passed to kubelet on start. CNI-Genie allows for the co-existance of multiple CNI plugins in runtime. | ||
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[![Build Status](https://travis-ci.org/Huawei-PaaS/CNI-Genie.svg)](https://travis-ci.org/Huawei-PaaS/CNI-Genie) | ||
[![Go Report Card](https://goreportcard.com/badge/github.com/Huawei-PaaS/CNI-Genie)](https://goreportcard.com/report/github.com/Huawei-PaaS/CNI-Genie) | ||
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Please feel free to post your feedback, questions on CNI-Genie [Slack channel](https://cni-genie.slack.com/) | ||
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## Demo | ||
Here is a 6 minute demo video that demonstrates 3 scenarios | ||
1. Assign an IP address to a pod from a particular network solution, e.g., 'Weave-net' | ||
2. Assign multi-IP addresses to a pod from multiple network solutions, e.g., 1st IP address from 'Weave-net', 2nd IP address from 'Canal' | ||
3. Assign an IP address to a pod from the "less congested" network solution, e.g., from 'Canal' that is less congested | ||
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[![asciicast](https://asciinema.org/a/118191.png)](https://asciinema.org/a/118191) | ||
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# Contributing | ||
[Contributing](../../CONTRIBUTING.md) | ||
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[Code of Conduct](../../CODE_OF_CONDUCT.md) | ||
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# Why we created CNI-Genie? | ||
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CNI Genie is an add-on to [Kuberenets](https://github.com/kubernetes/kubernetes) open-source project and is designed to provide the following features: | ||
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1. [wide range of network offerings, CNI plugins](../../docs/multiple-cni-plugins/README.md), available to the users in runtime. This figure shows Kubernetes CNI Plugin landscape before and after CNI-Genie | ||
![image](../../docs/multiple-cni-plugins/what-cni-genie.png) | ||
- User-story: based on "performance" requirements, "application" requirements, “workload placement” requirements, the user could be interested to use different CNI plugins for different application groups | ||
- Different CNI plugins are different in terms of need for port-mapping, NAT, tunneling, interrupting host ports/interfaces | ||
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[Watch multiple CNI plugins demo](https://github.com/Huawei-PaaS/CNI-Genie/blob/master/docs/multiple-cni-plugins/README.md#demo) | ||
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2. [Multiple NICs per container & per pod](../../docs/multiple-ips/README.md). The user can select multiple NICs to be added to a container upon creating them. Each NIC can get an IP address from an existing CNI plugin of choice. This makes the container reachable across multiple networks. Some use-cases from [SIG-Network](https://github.com/kubernetes/community/wiki/SIG-Network) are depicted in the figure below | ||
![image](../../docs/multiple-ips/multi-interface.PNG) | ||
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[Watch multi-NICs per 'container' demo](https://github.com/Huawei-PaaS/CNI-Genie/blob/master/docs/multiple-ips/README.md#demo) | ||
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[Watch multi-NICs per 'pod' demo](https://github.com/Huawei-PaaS/CNI-Genie/blob/master/docs/multiple-ips/README.md#feature-2-extension-cni-genie-multiple-ip-addresses-per-pod) (IP addresses assigned not only to the container, but also to the Pod) | ||
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3. [Network Attachment Definition](../../docs/network-attachment-definitions/README.md). CNI-Genie supports [NPWG Multi-Network Specification v1](https://github.com/K8sNetworkPlumbingWG/multi-net-spec) style network attachment to pods, where pods can be assigned IP according to network-attachment-definition CRD objects created by user. | ||
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4. The user can leave the CNI plugin selection to CNI-Genie. CNI-Genie watches the Key Performance Indicator (KPI) that is of interest to the user and [selects the CNI plugin](../../docs/smart-cni-genie/README.md), accordingly. | ||
- CNI Genie watches KPI(s) of interest for existing CNI plugins, e.g., occupancy rate, number of subnets, latency, bandwidth | ||
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[Watch Smart CNI Plugin Selection demo](https://github.com/Huawei-PaaS/CNI-Genie/blob/master/docs/smart-cni-genie/README.md#demo) | ||
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5. [Default plugin support](../../docs/default-plugin/README.md). Another useful feature from genie. Using this, we can ensure to get ip address(es) for a pod by selecting default set of plugins | ||
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6. Network isolation, i.e., | ||
- Dedicated 'physical' network for a tenant | ||
- Isolated 'logical' networks for different tenants on a shared 'physical'network | ||
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Usecase : [Obtaining Pod Ip address from customized subnet](../../docs/network-isolation/README.md) | ||
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7. [CNI-Genie network policy engine](../../docs/network-policy/README.md) for network level ACLs | ||
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8. Real-time switching between different (physical or logical) networks for a given workload. This allows for | ||
- Price minimization: dynamically switching workload to a cheaper network as network prices change | ||
- Maximizing network utilization: dynamically switching workload to the less congested network at a threshold | ||
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![image](../../docs/network-switching.PNG) | ||
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Note: CNI-Genie itself is NOT a routing solution! It makes a call to CNI plugins that provide routing service | ||
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### More docs here [Getting started](GettingStarted.md), [CNI-Genie Feature Set](CNIGenieFeatureSet.md) | ||
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## Developer's Guide | ||
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### Build process | ||
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After making any modification to source files, below steps can be followed to build and use the new binary. | ||
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Note that you should install genie first before making changes to the source. This ensures genie conf file is generated successfully. | ||
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Please make sure to run the below commands with root privilege. | ||
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#### *Building and Using CNI-Genie plugin:* | ||
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Build genie binary by running: | ||
``` | ||
make plugin | ||
``` | ||
Place "genie" binary from dest/ into /opt/cni/bin/ directory. | ||
``` | ||
cp dist/genie /opt/cni/bin/genie | ||
``` | ||
### Test process | ||
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#### prerequisites | ||
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A running kubernetes cluster is required to run the tests. | ||
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#### Running the tests | ||
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To run ginkgo tests for CNI-Genie run the following command: | ||
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If Kubernetes cluster is 1.7+ | ||
``` | ||
make test testKubeVersion=1.7 testKubeConfig=/etc/kubernetes/admin.conf | ||
``` | ||
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If Kubernetes cluster is 1.5.x | ||
``` | ||
make test testKubeVersion=1.5 |
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--- | ||
kind: ClusterRole | ||
apiVersion: rbac.authorization.k8s.io/v1beta1 | ||
metadata: | ||
name: genie | ||
rules: | ||
- apiGroups: | ||
- "" | ||
resources: | ||
- pods | ||
verbs: | ||
- get | ||
- update | ||
- patch | ||
- apiGroups: | ||
- "alpha.network.k8s.io" | ||
resources: | ||
- logicalnetworks | ||
verbs: | ||
- get | ||
- update | ||
- patch | ||
- apiGroups: | ||
- "alpha.network.k8s.io" | ||
resources: | ||
- physicalnetworks | ||
verbs: | ||
- get | ||
- update | ||
- patch | ||
- apiGroups: | ||
- "k8s.cni.cncf.io" | ||
resources: | ||
- network-attachment-definitions | ||
verbs: | ||
- get | ||
- update | ||
- apiGroups: | ||
- "" | ||
resources: | ||
- configmaps | ||
verbs: | ||
- get | ||
- apiGroups: | ||
- "admissionregistration.k8s.io" | ||
resources: | ||
- validatingwebhookconfigurations | ||
verbs: | ||
- get | ||
- update | ||
- create | ||
- delete | ||
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--- | ||
kind: ClusterRoleBinding | ||
apiVersion: rbac.authorization.k8s.io/v1beta1 | ||
metadata: | ||
name: genie | ||
roleRef: | ||
apiGroup: rbac.authorization.k8s.io | ||
kind: ClusterRole | ||
name: genie | ||
subjects: | ||
- kind: ServiceAccount | ||
name: genie | ||
namespace: kube-system | ||
- kind: Group | ||
name: system:authenticated | ||
apiGroup: rbac.authorization.k8s.io | ||
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--- | ||
apiVersion: v1 | ||
kind: ServiceAccount | ||
metadata: | ||
name: genie | ||
namespace: kube-system | ||
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--- | ||
# This ConfigMap can be used to configure a self-hosted CNI-Genie installation. | ||
kind: ConfigMap | ||
apiVersion: v1 | ||
metadata: | ||
name: genie-config | ||
namespace: kube-system | ||
data: | ||
# The CNI network configuration to install on each node. | ||
cni_genie_network_config: |- | ||
{ | ||
"name": "k8s-pod-network", | ||
"type": "genie", | ||
"log_level": "info", | ||
"datastore_type": "kubernetes", | ||
"hostname": "__KUBERNETES_NODE_NAME__", | ||
"policy": { | ||
"type": "k8s", | ||
"k8s_auth_token": "__SERVICEACCOUNT_TOKEN__" | ||
}, | ||
"kubernetes": { | ||
"k8s_api_root": "https://__KUBERNETES_SERVICE_HOST__:__KUBERNETES_SERVICE_PORT__", | ||
"kubeconfig": "/etc/cni/net.d/genie-kubeconfig" | ||
}, | ||
"romana_root": "http://__ROMANA_SERVICE_HOST__:__ROMANA_SERVICE_PORT__", | ||
"segment_label_name": "romanaSegment" | ||
} | ||
--- | ||
# Install CNI-Genie plugin on each slave node. | ||
kind: DaemonSet | ||
apiVersion: extensions/v1beta1 | ||
metadata: | ||
name: genie-plugin | ||
namespace: kube-system | ||
labels: | ||
k8s-app: genie | ||
spec: | ||
selector: | ||
matchLabels: | ||
k8s-app: genie | ||
template: | ||
metadata: | ||
labels: | ||
k8s-app: genie | ||
annotations: | ||
scheduler.alpha.kubernetes.io/critical-pod: '' | ||
spec: | ||
hostNetwork: true | ||
hostPID: true | ||
serviceAccountName: genie | ||
tolerations: | ||
- key: CriticalAddonsOnly | ||
operator: Exists | ||
- key: node.kubernetes.io/not-ready | ||
effect: NoSchedule | ||
operator: Exists | ||
containers: | ||
# Create a container with install.sh that | ||
# Installs required 00-genie.conf and genie binary | ||
# on slave node. | ||
- name: install-cni | ||
image: cnigenie/genie-plugin:v3.0 | ||
imagePullPolicy: Always | ||
command: ["/launch.sh"] | ||
env: | ||
- name: CNI_NETWORK_CONFIG | ||
valueFrom: | ||
configMapKeyRef: | ||
name: genie-config | ||
key: cni_genie_network_config | ||
- name: KUBERNETES_NODE_NAME | ||
valueFrom: | ||
fieldRef: | ||
fieldPath: spec.nodeName | ||
volumeMounts: | ||
- mountPath: /host/opt/cni/bin | ||
name: cni-bin-dir | ||
- mountPath: /host/etc/cni/net.d | ||
name: cni-net-dir | ||
volumes: | ||
- name: cni-bin-dir | ||
hostPath: | ||
path: /opt/cni/bin | ||
- name: cni-net-dir | ||
hostPath: | ||
path: /etc/cni/net.d |