docker swarm 集群
用Docker swarm快速部署Nebula Graph集群的教程一、前言
本文介绍如何使用 Docker Swarm 来部署 Nebula Graph 集群。
二、nebula集群搭建
2.1 环境准备
机器准备
ip 内存(Gb) cpu(核数) 192.168.1.166 16 4 192.168.1.167 16 4 192.168.1.168 16 4
在安装前确保所有机器已安装docker
2.2 初始化swarm集群
在192.168.1.166机器上执行
$ docker swarm init --advertise-addr 192.168.1.166 Swarm initialized: current node (dxn1zf6l61qsb1josjja83ngz) is now a manager. To add a worker to this swarm, run the following command: docker swarm join \ --token SWMTKN-1-49nj1cmql0jkz5s954yi3oex3nedyz0fb0xx14ie39trti4wxv-8vxv8rssmk743ojnwacrr2e7c \ 192.168.1.166:2377 To add a manager to this swarm, run 'docker swarm join-token manager' and follow the instructions.
2.3 加入worker节点
根据init命令提示内容，加入swarm worker节点，在192.168.1.167 192.168.1.168分别执行
docker swarm join \ --token SWMTKN-1-49nj1cmql0jkz5s954yi3oex3nedyz0fb0xx14ie39trti4wxv-8vxv8rssmk743ojnwacrr2e7c \ 192.168.1.166:2377
2.4 验证集群
docker node ls ID HOSTNAME STATUS AVAILABILITY MANAGER STATUS ENGINE VERSION h0az2wzqetpwhl9ybu76yxaen * KF2-DATA-166 Ready Active Reachable 18.06.1-ce q6jripaolxsl7xqv3cmv5pxji KF2-DATA-167 Ready Active Leader 18.06.1-ce h1iql1uvm7123h3gon9so69dy KF2-DATA-168 Ready Active 18.06.1-ce
2.5 配置docker stack
vi docker-stack.yml
配置如下内容
version: '3.6' services: metad0: image: vesoft/nebula-metad:nightly env_file: - ./nebula.env command: - --meta_server_addrs=192.168.1.166:45500,192.168.1.167:45500,192.168.1.168:45500 - --local_ip=192.168.1.166 - --ws_ip=192.168.1.166 - --port=45500 - --data_path=/data/meta - --log_dir=/logs - --v=0 - --minloglevel=2 deploy: replicas: 1 restart_policy: condition: on-failure placement: constraints: - node.hostname == KF2-DATA-166 healthcheck: test: ["CMD", "curl", "-f", "http://192.168.1.166:11000/status"] interval: 30s timeout: 10s retries: 3 start_period: 20s ports: - target: 11000 published: 11000 protocol: tcp mode: host - target: 11002 published: 11002 protocol: tcp mode: host - target: 45500 published: 45500 protocol: tcp mode: host volumes: - data-metad0:/data/meta - logs-metad0:/logs networks: - nebula-net metad1: image: vesoft/nebula-metad:nightly env_file: - ./nebula.env command: - --meta_server_addrs=192.168.1.166:45500,192.168.1.167:45500,192.168.1.168:45500 - --local_ip=192.168.1.167 - --ws_ip=192.168.1.167 - --port=45500 - --data_path=/data/meta - --log_dir=/logs - --v=0 - --minloglevel=2 deploy: replicas: 1 restart_policy: condition: on-failure placement: constraints: - node.hostname == KF2-DATA-167 healthcheck: test: ["CMD", "curl", "-f", "http://192.168.1.167:11000/status"] interval: 30s timeout: 10s retries: 3 start_period: 20s ports: - target: 11000 published: 11000 protocol: tcp mode: host - target: 11002 published: 11002 protocol: tcp mode: host - target: 45500 published: 45500 protocol: tcp mode: host volumes: - data-metad1:/data/meta - logs-metad1:/logs networks: - nebula-net metad2: image: vesoft/nebula-metad:nightly env_file: - ./nebula.env command: - --meta_server_addrs=192.168.1.166:45500,192.168.1.167:45500,192.168.1.168:45500 - --local_ip=192.168.1.168 - --ws_ip=192.168.1.168 - --port=45500 - --data_path=/data/meta - --log_dir=/logs - --v=0 - --minloglevel=2 deploy: replicas: 1 restart_policy: condition: on-failure placement: constraints: - node.hostname == KF2-DATA-168 healthcheck: test: ["CMD", "curl", "-f", "http://192.168.1.168:11000/status"] interval: 30s timeout: 10s retries: 3 start_period: 20s ports: - target: 11000 published: 11000 protocol: tcp mode: host - target: 11002 published: 11002 protocol: tcp mode: host - target: 45500 published: 45500 protocol: tcp mode: host volumes: - data-metad2:/data/meta - logs-metad2:/logs networks: - nebula-net storaged0: image: vesoft/nebula-storaged:nightly env_file: - ./nebula.env command: - --meta_server_addrs=192.168.1.166:45500,192.168.1.167:45500,192.168.1.168:45500 - --local_ip=192.168.1.166 - --ws_ip=192.168.1.166 - --port=44500 - --data_path=/data/storage - --log_dir=/logs - --v=0 - --minloglevel=2 deploy: replicas: 1 restart_policy: condition: on-failure placement: constraints: - node.hostname == KF2-DATA-166 depends_on: - metad0 - metad1 - metad2 healthcheck: test: ["CMD", "curl", "-f", "http://192.168.1.166:12000/status"] interval: 30s timeout: 10s retries: 3 start_period: 20s ports: - target: 12000 published: 12000 protocol: tcp mode: host - target: 12002 published: 12002 protocol: tcp mode: host volumes: - data-storaged0:/data/storage - logs-storaged0:/logs networks: - nebula-net storaged1: image: vesoft/nebula-storaged:nightly env_file: - ./nebula.env command: - --meta_server_addrs=192.168.1.166:45500,192.168.1.167:45500,192.168.1.168:45500 - --local_ip=192.168.1.167 - --ws_ip=192.168.1.167 - --port=44500 - --data_path=/data/storage - --log_dir=/logs - --v=0 - --minloglevel=2 deploy: replicas: 1 restart_policy: condition: on-failure placement: constraints: - node.hostname == KF2-DATA-167 depends_on: - metad0 - metad1 - metad2 healthcheck: test: ["CMD", "curl", "-f", "http://192.168.1.167:12000/status"] interval: 30s timeout: 10s retries: 3 start_period: 20s ports: - target: 12000 published: 12000 protocol: tcp mode: host - target: 12002 published: 12004 protocol: tcp mode: host volumes: - data-storaged1:/data/storage - logs-storaged1:/logs networks: - nebula-net storaged2: image: vesoft/nebula-storaged:nightly env_file: - ./nebula.env command: - --meta_server_addrs=192.168.1.166:45500,192.168.1.167:45500,192.168.1.168:45500 - --local_ip=192.168.1.168 - --ws_ip=192.168.1.168 - --port=44500 - --data_path=/data/storage - --log_dir=/logs - --v=0 - --minloglevel=2 deploy: replicas: 1 restart_policy: condition: on-failure placement: constraints: - node.hostname == KF2-DATA-168 depends_on: - metad0 - metad1 - metad2 healthcheck: test: ["CMD", "curl", "-f", "http://192.168.1.168:12000/status"] interval: 30s timeout: 10s retries: 3 start_period: 20s ports: - target: 12000 published: 12000 protocol: tcp mode: host - target: 12002 published: 12006 protocol: tcp mode: host volumes: - data-storaged2:/data/storage - logs-storaged2:/logs networks: - nebula-net graphd1: image: vesoft/nebula-graphd:nightly env_file: - ./nebula.env command: - --meta_server_addrs=192.168.1.166:45500,192.168.1.167:45500,192.168.1.168:45500 - --port=3699 - --ws_ip=192.168.1.166 - --log_dir=/logs - --v=0 - --minloglevel=2 deploy: replicas: 1 restart_policy: condition: on-failure placement: constraints: - node.hostname == KF2-DATA-166 depends_on: - metad0 - metad1 - metad2 healthcheck: test: ["CMD", "curl", "-f", "http://192.168.1.166:13000/status"] interval: 30s timeout: 10s retries: 3 start_period: 20s ports: - target: 3699 published: 3699 protocol: tcp mode: host - target: 13000 published: 13000 protocol: tcp # mode: host - target: 13002 published: 13002 protocol: tcp mode: host volumes: - logs-graphd:/logs networks: - nebula-net graphd2: image: vesoft/nebula-graphd:nightly env_file: - ./nebula.env command: - --meta_server_addrs=192.168.1.166:45500,192.168.1.167:45500,192.168.1.168:45500 - --port=3699 - --ws_ip=192.168.1.167 - --log_dir=/logs - --v=2 - --minloglevel=2 deploy: replicas: 1 restart_policy: condition: on-failure placement: constraints: - node.hostname == KF2-DATA-167 depends_on: - metad0 - metad1 - metad2 healthcheck: test: ["CMD", "curl", "-f", "http://192.168.1.167:13001/status"] interval: 30s timeout: 10s retries: 3 start_period: 20s ports: - target: 3699 published: 3640 protocol: tcp mode: host - target: 13000 published: 13001 protocol: tcp mode: host - target: 13002 published: 13003 protocol: tcp # mode: host volumes: - logs-graphd2:/logs networks: - nebula-net graphd3: image: vesoft/nebula-graphd:nightly env_file: - ./nebula.env command: - --meta_server_addrs=192.168.1.166:45500,192.168.1.167:45500,192.168.1.168:45500 - --port=3699 - --ws_ip=192.168.1.168 - --log_dir=/logs - --v=0 - --minloglevel=2 deploy: replicas: 1 restart_policy: condition: on-failure placement: constraints: - node.hostname == KF2-DATA-168 depends_on: - metad0 - metad1 - metad2 healthcheck: test: ["CMD", "curl", "-f", "http://192.168.1.168:13002/status"] interval: 30s timeout: 10s retries: 3 start_period: 20s ports: - target: 3699 published: 3641 protocol: tcp mode: host - target: 13000 published: 13002 protocol: tcp # mode: host - target: 13002 published: 13004 protocol: tcp mode: host volumes: - logs-graphd3:/logs networks: - nebula-net networks: nebula-net: external: true attachable: true name: host volumes: data-metad0: logs-metad0: data-metad1: logs-metad1: data-metad2: logs-metad2: data-storaged0: logs-storaged0: data-storaged1: logs-storaged1: data-storaged2: logs-storaged2: logs-graphd: logs-graphd2: logs-graphd3: docker-stack.yml
编辑 nebula.env
加入如下内容
TZ=UTC USER=root
nebula.env
2.6 启动nebula集群
docker stack deploy nebula -c docker-stack.yml
三、集群负载均衡及高可用配置
Nebula Graph的客户端目前(1.X)没有提供负载均衡的能力，只是随机选一个graphd去连接。所以生产使用的时候要自己做个负载均衡和高可用。
图3.1
将整个部署架构分为三层，数据服务层，负载均衡层及高可用层。如图3.1所示
负载均衡层：对client请求做负载均衡，将请求分发至下方数据服务层
高可用层: 这里实现的是haproxy的高可用，保证负载均衡层的服务从而保证整个集群的正常服务
3.1 负载均衡配置
haproxy使用docker-compose配置。分别编辑以下三个文件
Dockerfile 加入以下内容
FROM haproxy:1.7 COPY haproxy.cfg /usr/local/etc/haproxy/haproxy.cfg EXPOSE 3640
Dockerfile
docker-compose.yml加入以下内容
version: "3.2" services: haproxy: container_name: haproxy build: . volumes: - ./haproxy.cfg:/usr/local/etc/haproxy/haproxy.cfg ports: - 3640:3640 restart: always networks: - app_net networks: app_net: external: true
docker-compose.yml
haproxy.cfg加入以下内容
global daemon maxconn 30000 log 127.0.0.1 local0 info log 127.0.0.1 local1 warning defaults log-format %hr\ %ST\ %B\ %Ts log global mode http option http-keep-alive timeout connect 5000ms timeout client 10000ms timeout server 50000ms timeout http-request 20000ms # custom your own frontends && backends && listen conf #CUSTOM listen graphd-cluster bind *:3640 mode tcp maxconn 300 balance roundrobin server server1 192.168.1.166:3699 maxconn 300 check server server2 192.168.1.167:3699 maxconn 300 check server server3 192.168.1.168:3699 maxconn 300 check listen stats bind *:1080 stats refresh 30s stats uri /stats
3.2 启动haproxy
docker-compose up -d
3.2 高可用配置
注：配置keepalive需预先准备好vip (虚拟ip)，在以下配置中192.168.1.99便为虚拟ip
在192.168.1.166 、192.168.1.167、192.168.1.168上均做以下配置
安装keepalived
apt-get update && apt-get upgrade && apt-get install keepalived -y
更改keepalived配置文件/etc/keepalived/keepalived.conf（三台机器中 做如下配置，priority应设置不同值确定优先级）
192.168.1.166机器配置
global_defs {
router_id lb01 #标识信息，一个名字而已；
}
vrrp_script chk_haproxy {
script "killall -0 haproxy" interval 2
}
vrrp_instance VI_1 {
state MASTER
interface ens160
virtual_router_id 52
priority 999
# 设定MASTER与BACKUP负载均衡器之间同步检查的时间间隔，单位是秒
advert_int 1
# 设置验证类型和密码
authentication {
# 设置验证类型，主要有PASS和AH两种
auth_type PASS
# 设置验证密码，在同一个vrrp_instance下，MASTER与BACKUP必须使用相同的密码才能正常通信
auth_pass amber1
}
virtual_ipaddress {
# 虚拟IP为192.168.1.99/24;绑定接口为ens160;别名ens169:1，主备相同
192.168.1.99/24 dev ens160 label ens160:1
}
track_script {
chk_haproxy
}
}
167机器配置
global_defs {
router_id lb01 #标识信息，一个名字而已；
}
vrrp_script chk_haproxy {
script "killall -0 haproxy" interval 2
}
vrrp_instance VI_1 {
state BACKUP
interface ens160
virtual_router_id 52
priority 888
# 设定MASTER与BACKUP负载均衡器之间同步检查的时间间隔，单位是秒
advert_int 1
# 设置验证类型和密码
authentication {
# 设置验证类型，主要有PASS和AH两种
auth_type PASS
# 设置验证密码，在同一个vrrp_instance下，MASTER与BACKUP必须使用相同的密码才能正常通信
auth_pass amber1
}
virtual_ipaddress {
# 虚拟IP为192.168.1.99/24;绑定接口为ens160;别名ens160:1，主备相同
192.168.1.99/24 dev ens160 label ens160:1
}
track_script {
chk_haproxy
}
}
168机器配置
global_defs {
router_id lb01 #标识信息，一个名字而已；
}
vrrp_script chk_haproxy {
script "killall -0 haproxy" interval 2
}
vrrp_instance VI_1 {
state BACKUP
interface ens160
virtual_router_id 52
priority 777
# 设定MASTER与BACKUP负载均衡器之间同步检查的时间间隔，单位是秒
advert_int 1
# 设置验证类型和密码
authentication {
# 设置验证类型，主要有PASS和AH两种
auth_type PASS
# 设置验证密码，在同一个vrrp_instance下，MASTER与BACKUP必须使用相同的密码才能正常通信
auth_pass amber1
}
virtual_ipaddress {
# 虚拟IP为192.168.1.99/24;绑定接口为ens160;别名ens160:1，主备相同
192.168.1.99/24 dev ens160 label ens160:1
}
track_script {
chk_haproxy
}
}
keepalived相关命令
# 启动keepalived systemctl start keepalived # 使keepalived开机自启 systemctl enable keeplived # 重启keepalived systemctl restart keepalived
四、其他
离线怎么部署？把镜像更改为私有镜像库就成了，有问题欢迎来勾搭啊。
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