kubernetes部署高可用Harbor

前言

本文Harbor高可用依照Harbor官网部署，主要思路如下，大家可以根据具体情况选择搭建。

• 部署Postgresql高可用集群。（本文选用Stolon进行管理，请查看文章《kubernetes下Stolon部署高可用Postgresql》）
• 部署redis高可用集群。（本文选用Helm对redis进行高可用部署，请查看文章《kubernetes部署高可用redis》，该文以整理好redis编排文件可直接使用）
• 部署Harbor高可用集群。（本文主要阐述Harbor的高可用部署，为《kubernetes搭建Harbor无坑及Harbor仓库同步》补充部分，请先行阅读）

一、Harbor部署前准备

本文仅说明高可用配置，其余部署请查看《kubernetes搭建Harbor无坑及Harbor仓库同步》

.安装方式

• helm安装
• 直接使用博主整理好的编排文件安装（通过Helm生成）

1.helm安装

安装Helm请查看《kubernetes搭建Harbor无坑及Harbor仓库同步》，其中包含Helm安装。

1.1.下载 harbor-helm

git clone https://github.com/goharbor/harbor-helm.git
cd XXX/harbor-helm

1.2.修改value.yaml

database的Postgresql配置

database:
  # if external database is used, set "type" to "external"
  # and fill the connection informations in "external" section
  type: external
  internal:
    image:
      repository: goharbor/harbor-db
      tag: v1.8.2-dev
    # The initial superuser password for internal database
    password: "changeit"
    # resources:
    #  requests:
    #    memory: 256Mi
    #    cpu: 100m
    nodeSelector: {}
    tolerations: []
    affinity: {}
  external:
    host: "stolon-proxy-service" #管理postgresql的stolon的service，因为都在Pod中可相互访问
    port: "5432"
    username: "postgres"
    password: "password1"
    coreDatabase: "registry"
    clairDatabase: "clair"
    notaryServerDatabase: "notaryserver"
    notarySignerDatabase: "notarysigner"
    sslmode: "disable"
  ## Additional deployment annotations
  podAnnotations: {}

redis的配置

redis:
  # if external Redis is used, set "type" to "external"
  # and fill the connection informations in "external" section
  type: external
  internal:
    image:
      repository: goharbor/redis-photon
      tag: v1.8.2-dev
    # resources:
    #  requests:
    #    memory: 256Mi
    #    cpu: 100m
    nodeSelector: {}
    tolerations: []
    affinity: {}
  external:
    host: "10.8.4.133" #haproxy的地址通过haproxy管理redis集群
    port: "6379"
    # The "coreDatabaseIndex" must be "0" as the library Harbor
    # used doesn't support configuring it
    coreDatabaseIndex: "0"
    jobserviceDatabaseIndex: "1"
    registryDatabaseIndex: "2"
    chartmuseumDatabaseIndex: "3"
    password: ""

修改Harbor其他组件replicas(副本数)

# 例如nginx的副本数更改
nginx:
  image:
    repository: goharbor/nginx-photon
    tag: v1.8.2-dev
  replicas: 3

1.3.准备Harbor所需的registry、notarysigner、notaryserver、clair数据库，Harbor会自动在其中建表。

执行sql语句脚本，供stolon-init-database-job.yaml使用

cat <<EOF > ./postgresql.sh
#!/bin/bash

host="stolon-proxy-service"
user="postgres"
db="postgres"
export PGPASSWORD="password1"

args=(
        # force postgres to not use the local unix socket (test "external" connectibility)
        --host "$host"
        --username "$user"
        --dbname "$db"
        --quiet --no-align --tuples-only
)

if select="$(echo 'SELECT 1' | psql "${args[@]}")" && [ "$select" = '1' ]; then
   echo "====notaryserver==database==creating===="
   psql -h stolon-proxy-service -p 5432 -U postgres -f "/docker-entrypoint-initdb.d/initial-notaryserver.sql"
   echo "====notarysigner==database==creating===="
   psql -h stolon-proxy-service -p 5432 -U postgres -f "/docker-entrypoint-initdb.d/initial-notarysigner.sql"
   echo "====registry==database==creating===="
   psql -h stolon-proxy-service -p 5432 -U postgres -f "/docker-entrypoint-initdb.d/initial-registry.sql"
   echo "====clair==database==creating===="
   psql -h stolon-proxy-service -p 5432 -U postgres -f "/docker-entrypoint-initdb.d/initial-clair.sql"
   exit 0
fi
exit 1
EOF

创建registry数据库

cat <<EOF > ./initial-registry.sql
CREATE DATABASE registry ENCODING 'UTF8';
\c registry;
CREATE TABLE schema_migrations(version bigint not null primary key, dirty boolean not null);
EOF

创建notaryserver数据库

cat <<EOF > ./initial-notaryserver.sql
CREATE DATABASE notaryserver;
CREATE USER server;
alter user server with encrypted password 'password';
GRANT ALL PRIVILEGES ON DATABASE notaryserver TO server;
EOF

创建notarysigner数据库

cat <<EOF > ./initial-notarysigner.sql
CREATE DATABASE notarysigner;
CREATE USER signer;
alter user signer with encrypted password 'password';
GRANT ALL PRIVILEGES ON DATABASE notarysigner TO signer;
EOF

创建clair数据库

cat <<EOF > ./initial-clair.sql
CREATE DATABASE clair;
EOF

创建一个job的yaml（stolon-init-database-job.yaml），用于创建数据库，注意更改脚本的挂载位置，并复制脚本到各个节点或为node和yaml加上nodeselect标签，只在当前标签node下复制脚本

apiVersion: batch/v1
kind: Job
metadata:
  name: stolon-init-database-job
spec:
  template:
    spec:
      containers:
      - name: stolon-proxy
        image: sorintlab/stolon:master-pg10
        command:
          - "/bin/bash"
          - "/docker-entrypoint-initdb.d/postgresql.sh"
        volumeMounts:
        - mountPath: /docker-entrypoint-initdb.d
          name: database
      restartPolicy: OnFailure     #失败重启
      volumes:
        - name: database
          hostPath:
            path: /root/tmp/harbor/stolon/examples/kubernetes/sql
  activeDeadlineSeconds: 600   #10分钟没有complete，不再重启并移除Pod

1.3.部署Postgresql、redis

• 按照《kubernetes下Stolon部署高可用Postgresql》部署Postgresql，注意加入stolon-init-database-job.yaml。
• 按照《kubernetes部署高可用redis》部署redis，之后用haproxy管理redis集群（不可直接使用redis的service暴露，service会访问到slave节点，redis副本是只读不可写的，在harbor中会有报错）
• 部署haproxy
  1. 安装haproxy
     
     yum -y install haproxy

cp /etc/haproxy/haproxy.cfg /etc/haproxy/haproxy.cfg-back

vim /etc/haproxy/haproxy.cfg
  2. 加入配置

defaults REDIS
mode tcp
timeout connect 1m
timeout server 6m
timeout client 6m

frontend ft_redis
 bind 0.0.0.0:6379 name redis
 default_backend bk_redis

backend bk_redis
 option tcp-check
 tcp-check connect
 tcp-check send PING\r\n
 tcp-check expect string +PONG
 tcp-check send info\ replication\r\n
 tcp-check expect string role:master
 tcp-check send QUIT\r\n
 tcp-check expect string +OK
 server R1 redis-0.redis-headless.default.svc.cluster.local:6379 check inter 1s
 server R2 redis-1.redis-headless.default.svc.cluster.local:6379 check inter 1s
 server R3 redis-2.redis-headless.default.svc.cluster.local:6379 check inter 1s

listen admin_stats
        stats   enable
        bind    *:9090
        mode    http
        option  httplog
        log     global
        maxconn 10
        stats   refresh 30s
        stats   uri /admin
        stats   realm haproxy
        stats   auth admin:admin
        stats   hide-version
        stats   admin if TRUE

systemctl start haproxy && systemctl enable haproxy && systemctl status haproxy

访问 harbor节点Ip:9090/admin如图所示，便成功

⚠️k8s master节点高可用可阅读《haproxy+keepalive实现master集群高可用》

1.4.部署Harbor

安装harbor并将日志写入文件，可编辑文件保留.yaml编排文件，以便以后使用

helm install . --debug --name hub |sed 'w harbor.yaml'

或执行以下命令，编排chart不执行，作用生成编排文件，删除多余部分，进行使用

helm install . --debug --dry-run --name hub |sed 'w harbor.yaml'

2.通过整理好的编排文件执行

链接:https://pan.baidu.com/s/1cr1fnWGHc-70HAxx1YH4kg 密码:21a8

直接使用这个编排文件可能会有问题，最好勤劳以下使用helm跑，也可避免更改配置遗漏或错误的问题，适用用于实验，如若搭建请注意修改Volum、requestsource等Pod设置