Kubernetes Nacos K8SNacos

This project contains a Nacos Docker image meant to facilitate the deployment of Nacos on Kubernetes via StatefulSets.

Quick Start

Environment

Machine configuration

Intranet IP	Hostname	Configuration
172.17.79.3	k8s-master	CentOS Linux release 7.4.1708 (Core) Single-core processor Mem 4G Cloud disk 40G
172.17.79.4	node01	CentOS Linux release 7.4.1708 (Core) Single-core processor Mem 4G Cloud disk 40G
172.17.79.5	node02	CentOS Linux release 7.4.1708 (Core) Single-core processor Mem 4G Cloud disk 40G

Kubernetes 版本：1.12.2 （如果你和我一样只使用了三台机器,那么记得开启master节点的部署功能）
NFS 版本：4.1 在k8s-master进行安装Server端,并且指定共享目录,本项目指定的**/data/nfs-share**
Git

Clone Project

git clone https://github.com/nacos-group/nacos-k8s.git

Deploy NFS

Create Role

kubectl create -f deploy/nfs/rbac.yaml

If your K8S namespace is not default, execute the following script before creating RBAC

# Set the subject of the RBAC objects to the current namespace where the provisioner is being deployed
$ NS=$(kubectl config get-contexts|grep -e "^\*" |awk '{print $5}')
$ NAMESPACE=${NS:-default}
$ sed -i'' "s/namespace:.*/namespace: $NAMESPACE/g" ./deploy/nfs/rbac.yaml

Create ServiceAccount And deploy NFS-Client Provisioner

kubectl create -f deploy/nfs/deployment.yaml

Create NFS StorageClass

kubectl create -f deploy/nfs/class.yaml

Verify that NFS is working

kubectl get pod -l app=nfs-client-provisioner

Deploy database

Deploy master

cd nacos-k8s

kubectl create -f deploy/mysql/mysql-master-nfs.yaml

Deploy slave

cd nacos-k8s 

kubectl create -f deploy/mysql/mysql-slave-nfs.yaml

Verify that Database is working

# master
kubectl get pod 
NAME                         READY   STATUS    RESTARTS   AGE
mysql-master-gf2vd                        1/1     Running   0          111m

# slave
kubectl get pod 
mysql-slave-kf9cb                         1/1     Running   0          110m

Deploy Nacos

Get master-slave database cluster IP

# Get master-slave database cluster IP
kubectl get svc

mysql            NodePort    10.105.42.247   <none>        3306:31833/TCP   2d23h
mysql-bak        NodePort    10.105.35.138   <none>        3306:31522/TCP   2d23h

Modify depoly/nacos/nacos-pvc-nfs.yaml

data:
  mysql.master.db.name: "db name"
  mysql.master.port: "master db port"
  mysql.slave.port: "slave db port"
  mysql.master.user: "master db username"
  mysql.master.password: "master db password"

Create Nacos

kubectl create -f nacos-k8s/deploy/nacos/nacos-pvc-nfs.yaml

Verify that Nacos is working

kubectl get pod -l app=nacos


AME      READY   STATUS    RESTARTS   AGE
nacos-0   1/1     Running   0          19h
nacos-1   1/1     Running   0          19h
nacos-2   1/1     Running   0          19h

Limitations

Scaling is not currently supported
Persistent Volumes must be used. emptyDirs will possibly result in a loss of data

Docker Image

Image build source code in build directory,It's comprised of a base Ubuntu 16.04 image using the latest release of the OpenJDK JRE based on the 1.8 JVM (JDK 8u111) and the latest stable release of Nacos,0.5.0, And already pushed into Docker Hub

Project directory

Directory Name	Description
build	Image build source code
deploy	Deploy the required files

Configuration properties

nacos-pvc-nfs.yaml or nacos-quick-start.yaml

Name	Required	Description
mysql.master.db.name	Y	Master database name
mysql.master.port	N	Master database port
mysql.slave.port	N	Slave database port
mysql.master.user	Y	Master database username
mysql.master.password	Y	Master database password
NACOS_REPLICAS	Y	The number of clusters must be consistent with the value of the replicas attribute
NACOS_SERVER_PORT	N	Nacos port,default:8848
PREFER_HOST_MODE	Y	Enable Nacos cluster node domain name support

nfs deployment.yaml

Name	Required	Description
NFS_SERVER	Y	NFS server address
NFS_PATH	Y	NFS server shared directory
server	Y	NFS server address
path	Y	NFS server shared directory

mysql yaml

Name	Required	Description
MYSQL_ROOT_PASSWORD	N	Root password
MYSQL_DATABASE	Y	Database Name
MYSQL_USER	Y	Database Username
MYSQL_PASSWORD	Y	Database Password
MYSQL_REPLICATION_USER	Y	Master-slave replication username
MYSQL_REPLICATION_PASSWORD	Y	Master-slave replication password
Nfs:server	Y	NFS server address
Nfs:path	Y	NFS server shared path

Test

Service registration

curl -X PUT 'http://cluster-ip:8848/nacos/v1/ns/instance?serviceName=nacos.naming.serviceName&ip=20.18.7.10&port=8080'

Service discovery

curl -X GET 'http://cluster-ip:8848/nacos/v1/ns/instances?serviceName=nacos.naming.serviceName'

Publish config

curl -X POST "http://cluster-ip:8848/nacos/v1/cs/configs?dataId=nacos.cfg.dataId&group=test&content=helloWorld"

Get config

curl -X GET "http://集群地址:8848/nacos/v1/cs/configs?dataId=nacos.cfg.dataId&group=test"

FAQ

Q:If you don't want to build NFS, and you want to experience the nacos-k8s?

A:You can skip deploying NFS and use the following script to create Nacos

kubectl create -f nacos-k8s/deploy/nacos/nacos-quick-start.yaml

Q:If NFS is not deployed, how is the database deployed？

A:You can deploy in a local persistent, as follows：

kubectl create -f nacos-k8s/deploy/mysql/nacos-master-local.yaml

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