K8S--部署Nacos

原文网址：K8S--部署Nacos-CSDN博客

简介

本文介绍K8S部署Nacos的方法。Nacos版本是：2.2.3。

部署方案

本文为了简单，使用此部署方式：使用本地pv+configmap，以embedded模式部署单机nacos。以nodePort方式暴露端口。

正式环境可以这样部署：使用nfs，以mysql方式部署集群nacos，以ingress方式暴露端口。

官网网址

Kubernetes Nacos | Nacos

https://github.com/nacos-group/nacos-k8s/blob/master/deploy/nacos/nacos-pvc-nfs.yaml

部署结果

我的工作目录：/work/devops/k8s/app/nacos

1.创建命名空间

创建namespace.yaml文件

内容如下：

# 创建命名空间
apiVersion: v1
kind: Namespace
metadata:
  name: middle
  labels:
    name: middle

创建命名空间

kubectl apply -f namespace.yaml

结果

2.用ConfigMap创建配置

这里只能用ConfigMap，因为PV不能挂载单个文件，只能挂载目录。ConfigMap可以单独挂载配置文件。（想要挂载单个文件可以用hostPath方式）。

1.修改配置

先从github上下载nacos压缩包，地址：这里

修改配置文件（nacos-server-2.2.3\nacos\conf\application.properties），修改点如下：

备注：除了第一个要改为true之外，下边的几个都是随便写（最后一个配置必须大于32个字符，不然会报错）。

修改后的配置文件如下：

#
# Copyright 1999-2021 Alibaba Group Holding Ltd.
#
# 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.
#

#*************** Spring Boot Related Configurations ***************#
### Default web context path:
server.servlet.contextPath=/nacos
### Include message field
server.error.include-message=ALWAYS
### Default web server port:
server.port=8848

#*************** Network Related Configurations ***************#
### If prefer hostname over ip for Nacos server addresses in cluster.conf:
# nacos.inetutils.prefer-hostname-over-ip=false

### Specify local server's IP:
# nacos.inetutils.ip-address=


#*************** Config Module Related Configurations ***************#
### If use MySQL as datasource:
### Deprecated configuration property, it is recommended to use `spring.sql.init.platform` replaced.
# spring.datasource.platform=mysql
# spring.sql.init.platform=mysql

### Count of DB:
# db.num=1

### Connect URL of DB:
# db.url.0=jdbc:mysql://127.0.0.1:3306/nacos?characterEncoding=utf8&connectTimeout=1000&socketTimeout=3000&autoReconnect=true&useUnicode=true&useSSL=false&serverTimezone=UTC
# db.user.0=nacos
# db.password.0=nacos

### Connection pool configuration: hikariCP
db.pool.config.connectionTimeout=30000
db.pool.config.validationTimeout=10000
db.pool.config.maximumPoolSize=20
db.pool.config.minimumIdle=2

#*************** Naming Module Related Configurations ***************#

### If enable data warmup. If set to false, the server would accept request without local data preparation:
# nacos.naming.data.warmup=true

### If enable the instance auto expiration, kind like of health check of instance:
# nacos.naming.expireInstance=true

### Add in 2.0.0
### The interval to clean empty service, unit: milliseconds.
# nacos.naming.clean.empty-service.interval=60000

### The expired time to clean empty service, unit: milliseconds.
# nacos.naming.clean.empty-service.expired-time=60000

### The interval to clean expired metadata, unit: milliseconds.
# nacos.naming.clean.expired-metadata.interval=5000

### The expired time to clean metadata, unit: milliseconds.
# nacos.naming.clean.expired-metadata.expired-time=60000

### The delay time before push task to execute from service changed, unit: milliseconds.
# nacos.naming.push.pushTaskDelay=500

### The timeout for push task execute, unit: milliseconds.
# nacos.naming.push.pushTaskTimeout=5000

### The delay time for retrying failed push task, unit: milliseconds.
# nacos.naming.push.pushTaskRetryDelay=1000

### Since 2.0.3
### The expired time for inactive client, unit: milliseconds.
# nacos.naming.client.expired.time=180000

#*************** CMDB Module Related Configurations ***************#
### The interval to dump external CMDB in seconds:
# nacos.cmdb.dumpTaskInterval=3600

### The interval of polling data change event in seconds:
# nacos.cmdb.eventTaskInterval=10

### The interval of loading labels in seconds:
# nacos.cmdb.labelTaskInterval=300

### If turn on data loading task:
# nacos.cmdb.loadDataAtStart=false


#*************** Metrics Related Configurations ***************#
### Metrics for prometheus
#management.endpoints.web.exposure.include=*

### Metrics for elastic search
management.metrics.export.elastic.enabled=false
#management.metrics.export.elastic.host=http://localhost:9200

### Metrics for influx
management.metrics.export.influx.enabled=false
#management.metrics.export.influx.db=springboot
#management.metrics.export.influx.uri=http://localhost:8086
#management.metrics.export.influx.auto-create-db=true
#management.metrics.export.influx.consistency=one
#management.metrics.export.influx.compressed=true

#*************** Access Log Related Configurations ***************#
### If turn on the access log:
server.tomcat.accesslog.enabled=true

### The access log pattern:
server.tomcat.accesslog.pattern=%h %l %u %t "%r" %s %b %D %{User-Agent}i %{Request-Source}i

### The directory of access log:
server.tomcat.basedir=file:.

#*************** Access Control Related Configurations ***************#
### If enable spring security, this option is deprecated in 1.2.0:
#spring.security.enabled=false

### The ignore urls of auth
nacos.security.ignore.urls=/,/error,/**/*.css,/**/*.js,/**/*.html,/**/*.map,/**/*.svg,/**/*.png,/**/*.ico,/console-ui/public/**,/v1/auth/**,/v1/console/health/**,/actuator/**,/v1/console/server/**

### The auth system to use, currently only 'nacos' and 'ldap' is supported:
nacos.core.auth.system.type=nacos

### If turn on auth system:
#nacos.core.auth.enabled=false
nacos.core.auth.enabled=true

### Turn on/off caching of auth information. By turning on this switch, the update of auth information would have a 15 seconds delay.
nacos.core.auth.caching.enabled=true

### Since 1.4.1, Turn on/off white auth for user-agent: nacos-server, only for upgrade from old version.
nacos.core.auth.enable.userAgentAuthWhite=false

### Since 1.4.1, worked when nacos.core.auth.enabled=true and nacos.core.auth.enable.userAgentAuthWhite=false.
### The two properties is the white list for auth and used by identity the request from other server.
#nacos.core.auth.server.identity.key=
#nacos.core.auth.server.identity.value=
nacos.core.auth.server.identity.key=exampleKey
nacos.core.auth.server.identity.value=exampleValue

### worked when nacos.core.auth.system.type=nacos
### The token expiration in seconds:
nacos.core.auth.plugin.nacos.token.cache.enable=false
nacos.core.auth.plugin.nacos.token.expire.seconds=18000
### The default token (Base64 String):
#nacos.core.auth.plugin.nacos.token.secret.key=
nacos.core.auth.plugin.nacos.token.secret.key=Ho9pJlDFurhga1847fhj3jtlsvc18jguehfjgkhh17365jdf8

### worked when nacos.core.auth.system.type=ldap，{0} is Placeholder,replace login username
#nacos.core.auth.ldap.url=ldap://localhost:389
#nacos.core.auth.ldap.basedc=dc=example,dc=org
#nacos.core.auth.ldap.userDn=cn=admin,${nacos.core.auth.ldap.basedc}
#nacos.core.auth.ldap.password=admin
#nacos.core.auth.ldap.userdn=cn={0},dc=example,dc=org
#nacos.core.auth.ldap.filter.prefix=uid
#nacos.core.auth.ldap.case.sensitive=true


#*************** Istio Related Configurations ***************#
### If turn on the MCP server:
nacos.istio.mcp.server.enabled=false

#*************** Core Related Configurations ***************#

### set the WorkerID manually
# nacos.core.snowflake.worker-id=

### Member-MetaData
# nacos.core.member.meta.site=
# nacos.core.member.meta.adweight=
# nacos.core.member.meta.weight=

### MemberLookup
### Addressing pattern category, If set, the priority is highest
# nacos.core.member.lookup.type=[file,address-server]
## Set the cluster list with a configuration file or command-line argument
# nacos.member.list=192.168.16.101:8847?raft_port=8807,192.168.16.101?raft_port=8808,192.168.16.101:8849?raft_port=8809
## for AddressServerMemberLookup
# Maximum number of retries to query the address server upon initialization
# nacos.core.address-server.retry=5
## Server domain name address of [address-server] mode
# address.server.domain=jmenv.tbsite.net
## Server port of [address-server] mode
# address.server.port=8080
## Request address of [address-server] mode
# address.server.url=/nacos/serverlist

#*************** JRaft Related Configurations ***************#

### Sets the Raft cluster election timeout, default value is 5 second
# nacos.core.protocol.raft.data.election_timeout_ms=5000
### Sets the amount of time the Raft snapshot will execute periodically, default is 30 minute
# nacos.core.protocol.raft.data.snapshot_interval_secs=30
### raft internal worker threads
# nacos.core.protocol.raft.data.core_thread_num=8
### Number of threads required for raft business request processing
# nacos.core.protocol.raft.data.cli_service_thread_num=4
### raft linear read strategy. Safe linear reads are used by default, that is, the Leader tenure is confirmed by heartbeat
# nacos.core.protocol.raft.data.read_index_type=ReadOnlySafe
### rpc request timeout, default 5 seconds
# nacos.core.protocol.raft.data.rpc_request_timeout_ms=5000

#*************** Distro Related Configurations ***************#

### Distro data sync delay time, when sync task delayed, task will be merged for same data key. Default 1 second.
# nacos.core.protocol.distro.data.sync.delayMs=1000

### Distro data sync timeout for one sync data, default 3 seconds.
# nacos.core.protocol.distro.data.sync.timeoutMs=3000

### Distro data sync retry delay time when sync data failed or timeout, same behavior with delayMs, default 3 seconds.
# nacos.core.protocol.distro.data.sync.retryDelayMs=3000

### Distro data verify interval time, verify synced data whether expired for a interval. Default 5 seconds.
# nacos.core.protocol.distro.data.verify.intervalMs=5000

### Distro data verify timeout for one verify, default 3 seconds.
# nacos.core.protocol.distro.data.verify.timeoutMs=3000

### Distro data load retry delay when load snapshot data failed, default 30 seconds.
# nacos.core.protocol.distro.data.load.retryDelayMs=30000

### enable to support prometheus service discovery
#nacos.prometheus.metrics.enabled=true

### Since 2.3
#*************** Grpc Configurations ***************#

## sdk grpc(between nacos server and client) configuration
## Sets the maximum message size allowed to be received on the server.
#nacos.remote.server.grpc.sdk.max-inbound-message-size=10485760

## Sets the time(milliseconds) without read activity before sending a keepalive ping. The typical default is two hours.
#nacos.remote.server.grpc.sdk.keep-alive-time=7200000

## Sets a time(milliseconds) waiting for read activity after sending a keepalive ping. Defaults to 20 seconds.
#nacos.remote.server.grpc.sdk.keep-alive-timeout=20000


## Sets a time(milliseconds) that specify the most aggressive keep-alive time clients are permitted to configure. The typical default is 5 minutes
#nacos.remote.server.grpc.sdk.permit-keep-alive-time=300000

## cluster grpc(inside the nacos server) configuration
#nacos.remote.server.grpc.cluster.max-inbound-message-size=10485760

## Sets the time(milliseconds) without read activity before sending a keepalive ping. The typical default is two hours.
#nacos.remote.server.grpc.cluster.keep-alive-time=7200000

## Sets a time(milliseconds) waiting for read activity after sending a keepalive ping. Defaults to 20 seconds.
#nacos.remote.server.grpc.cluster.keep-alive-timeout=20000

## Sets a time(milliseconds) that specify the most aggressive keep-alive time clients are permitted to configure. The typical default is 5 minutes
#nacos.remote.server.grpc.cluster.permit-keep-alive-time=300000

2.生成ConfigMap

将上一步的文件放到此路径：/work/devops/k8s/app/nacos/conf/application.properties

kubectl create configmap nacos-configmap --namespace=middle --from-file=conf/application.properties

结果：

configmap/nacos-configmap created

命令查看结果

kubectl get configmap -n middle

结果

dashboard查看结果

3.创建K8S配置

创建k8s.yaml文件，内容如下：

#用PV创建存储空间
---
apiVersion: v1
kind: PersistentVolume
metadata:
  name: pv-volume-nacos
  namespace: middle
  labels:
    type: local
    pv-name: pv-volume-nacos
spec:
  storageClassName: manual-nacos
  capacity:
    storage: 1Gi
  accessModes:
    - ReadWriteOnce
  hostPath:
    path: "/work/devops/k8s/app/nacos/pv"
---
apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: pv-claim-nacos
  namespace: middle
spec:
  storageClassName: manual-nacos
  accessModes:
    - ReadWriteOnce
  resources:
    requests:
      storage: 1Gi
  selector:
    matchLabels:
      pv-name: pv-volume-nacos

#创建Nacos容器
---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: nacos-standalone
  namespace: middle
spec:
  replicas: 1  #单机模式下若副本大于1,注册时会分配到不同副本上。web查看时，只能看到一个副本的注册服务。刷新web网页可切换副本
  selector:
    matchLabels:
      app: nacos-standalone
  template:
    metadata:
      labels:
        app: nacos-standalone
      annotations:
        pod.alpha.kubernetes.io/initialized: "true"
    spec:
      tolerations:       #设置能在master上部署
      - key: node-role.kubernetes.io/master
        operator: Exists
      initContainers:
        - name: peer-finder-plugin-install
          image: nacos/nacos-peer-finder-plugin:1.1
          imagePullPolicy: Always
          volumeMounts:
            - mountPath: /home/nacos/plugins/peer-finder
              name: volume
              subPath: peer-finder
      containers:
        - name: nacos
          image: nacos/nacos-server:v2.3.0
          imagePullPolicy: IfNotPresent
          env:
            - name: TZ
              value: Asia/Shanghai
            - name: MODE
              value: standalone
            - name: EMBEDDED_STORAGE
              value: embedded
          volumeMounts:
            - name: volume
              mountPath: /home/nacos/plugins/peer-finder
              subPath: peer-finder
            - name: volume
              mountPath: /home/nacos/data
              subPath: data
            - name: volume
              mountPath: /home/nacos/logs
              subPath: logs
            - name: config-map
              mountPath: /home/nacos/conf/application.properties
              subPath: application.properties
          ports:
            - containerPort: 8848
              name: client
            - containerPort: 9848
              name: client-rpc
            - containerPort: 9849
              name: raft-rpc
            - containerPort: 7848
              name: old-raft-rpc

      volumes:
      - name: volume
        persistentVolumeClaim:
          claimName: pv-claim-nacos
      - name: config-map
        configMap:
          name: nacos-configmap
      affinity:
        podAntiAffinity:
          requiredDuringSchedulingIgnoredDuringExecution:
            - labelSelector:
                matchExpressions:
                  - key: "app"
                    operator: In
                    values:
                      - nacos-standalone
              topologyKey: "kubernetes.io/hostname"

---
apiVersion: v1
kind: Service
metadata:
  namespace: middle
  name: nacos-service
  labels:
    app: nacos-service
spec:
  type: NodePort
  ports:
    - port: 8848
      name: server-regist
      targetPort: 8848
      nodePort: 30006
    - port: 9848  # 必须开放出去，否则开发和互联网环境无法访问，这是rpc 服务调用，程序默认 端口 偏移 1000 
      name: server-grpc
      targetPort: 9848
      nodePort: 30007 
    - port: 9849  # 必须开放出去，否则开发和互联网环境无法访问，这是rpc 服务调用，程序默认 端口 偏移 1000 
      name: server-grpc-sync
      targetPort: 9849
      nodePort: 30008
  selector:
    app: nacos-standalone

4.启动Nacos

kubectl apply -f k8s.yaml

结果

persistentvolume/pv-volume-nacos created
persistentvolumeclaim/pv-claim-nacos created
deployment.apps/nacos-standalone created
service/nacos-service created

用命令查看结果