多节点bigchaindb集群部署

文章比较的长，安装下来大概4个小时左右，我个人使用的服务器，速度会快一点。

安装环境

ostname	ip	os
node-admin	192.168.237.130	ubuntu 18.04.2 desktop
node1	192.168.237.131	ubuntu 18.04.2 server
node2	192.168.237.132	ubuntu 18.04.2 server
node3	192.168.237.133	ubuntu 18.04.2 server
node4	192.168.237.134	ubuntu 18.04.2 server
node5	192.168.237.135	ubuntu 18.04.2 server

其中node-admin用来使用ansible来执行远程命令（为了部署便利），node1-node5为bigchain DB节点。所有机器用户均为root

需要首先安装ansible，

sudo apt-add-repository ppa:ansible/ansible

sudo apt-get update

sudo apt-get install ansible

首先在所有节点上安装openssh-server，并允许root用户ssh。具体方式为修改/etc/ssh/sshd_config，修改为PermitRootLogin yes，然后重启ssh服务。

安装与配置ansible

接下来在node-admin上安装与配置ansible。

sudo apt-add-repository ppa:ansible/ansible
apt-get update && apt-get upgrade
apt-get install ansible

然后修改/etc/ansible/hosts:

root@node-admin:~# grep -Ev  "^$|#" /etc/ansible/hosts
[bigchain]
192.168.237.131 ansible_ssh_pass=123
192.168.237.132 ansible_ssh_pass=123
192.168.237.133 ansible_ssh_pass=123
192.168.237.134 ansible_ssh_pass=123
192.168.237.135 ansible_ssh_pass=123
root@node-admin:~#

设置为首次链接不需要key认证

sed -i "s/^#\(host_key_checking\).*/\1 = False/g" /etc/ansible/ansible.cfg

设置好了，可以测试一下：

ansible bigchain -m ping

如果这里测试失败，那就是安装ansible失败，最好，每一个节点单独安装一下。

安装bigchainDB

默认是在node-admin上执行

• 同步时钟

# 测试是否能ping通cn.pool.ntp.org
ansible bigchain -m command -a "ping cn.pool.ntp.org -c 4"
# 同步
ansible bigchain -m command -a "ntpdate cn.pool.ntp.org"

这里需要在每一个节点安装ntpdate

sudo apt-get install ntpdate

• 安装mongoDB

编辑sources.list

echo "deb [ arch=amd64 ] http://repo.mongodb.org/apt/ubuntu trusty/mongodb-org/3.4 multiverse" > mongodb-org-3.4.list

备用 清华的源  https://mirrors.tuna.tsinghua.edu.cn/help/mongodb/

echo "deb [ arch=amd64 ] https://mirrors.tuna.tsinghua.edu.cn/mongodb/apt/ubuntu trusty/mongodb-org/3.4 multiverse" > mongodb-org-3.4.list

创建mongod.yml，内容如下：

vim mongod.yml

---

- hosts: bigchain
  remote_user: root
  # invoke setup module to gather facts before executing tasks
  gather_facts: true

  tasks:
  - name: debug
    debug: msg="myhostname={{ansible_hostname}}"

  - name: apt-key
    command: sudo apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv 0C49F3730359A14518585931BC711F9BA15703C6

  - name: sources.list
    template:
      src: mongodb-org-3.4.list
      dest: /etc/apt/sources.list.d/mongodb-org-3.4.list
      owner: root
      group: root
      mode: 0644

  - name: update
    command: apt-get update -y

  - name: install packages
    apt:
      name: "{{item}}"
      force: yes
    with_items:
      - mongodb-org
      - g++
      - python3-dev
      - libffi-dev
      - python3-pip

  - name: setuptools
    command: pip3 install --upgrade pip setuptools

  - name: db
    command: mkdir -p /data/db

运行yml(耗时很长，中间需要等待所有的安装)

ansible-playbook mongod.yml

• 启动mongod

# 启动mongo
ansible bigchain -m command -a "mongod --replSet bigchain --fork --logpath /var/log/mongodb/mongod.log"

• 创建副本集

在node1执行，其它节点就会同步。

# 进入mongodb 命令行模式下
mongo
config = {_id: 'bigchain', members: [{
    "_id": 0,
    "host":"192.168.237.131:27017"
    }]
    }

    rs.initiate(config);
    rs.add("192.168.237.132:27017")
    rs.add("192.168.237.133:27017")
    rs.add("192.168.237.134:27017")
    rs.add("192.168.237.135:27017")

• 安装bigchainDB

ansible bigchain -m command -a "pip3 install --upgrade bigchaindb"
ansible bigchain -m command -a "bigchaindb -y configure mongodb"

• 修改bigchainDB配置

允许接收所有地址信息

ansible bigchain -m raw -a "sed -i 's/\(\"bind\": \"\)localhost:9984\"/\192.168.237.0:9984\"/g' /root/.bigchaindb"

修改replSet名称为bigchain（之前mongod的replset名称）：

ansible bigchain -m raw -a "sed -i 's/\(\"replicaset\": \"\).*/\1bigchain\",/g' /root/.bigchaindb"

还需要修改keyring选项，使之存储除本节点之外的所有其他的节点的keyring的公钥。先来获取所有节点的keyring的公钥

ansible bigchain -m raw -a "cat .bigchaindb | grep public | awk -F\\\" '{print \$4}'"

输出如下：

这里的keyring是需要记录下来，下面会用到。

在/root下创建conf.py文件

import sys
import json

keyring = {
    "192.168.237.131": "7772APkwHENC8j3tDaUK2WJYPF3AMrTkVgR7sW1y3bkZ",
    "192.168.237.132": "GRTkTmFuYETDaXAftSZW1SdCMMwaYs6p6yhAn5C4QBZv",
    "192.168.237.134": "Eok1FnDbKpak9t6SpJVpFsMqkvNiVGsys6BP8UbSiCTv",
    "192.168.237.133": "8bXEbEJVCDNhptYyAJ5WWHCngiie6VuwTKF5NmZ4Fazv",
    "192.168.237.135": "GH3uAPwi1MzXsxy4PJdj4p5m55nXuLAakNtpFNJw7cqH"
}

rets = []
for key, value in keyring.items():
    if key != sys.argv[1]:
        rets.append(value)

conf = json.load(open("/root/.bigchaindb"))
conf['keyring'] = rets

json.dump(conf, open("/root/.bigchaindb", "w"), indent=2)

继续在/root下创建bigchain.yml，用来分发该脚本，并执行该脚本

--

- hosts: bigchain
  remote_user: root
  # invoke setup module to gather facts before executing tasks
  gather_facts: true

  tasks:
  - name: debug
    debug: msg="my ip of eth0 is {{ansible_eth0.ipv4.address}}"

  - name: copy file
    template:
      src: conf.py
      dest: /root/conf.py
      owner: root
      group: root
      mode: 0644

  - name: modify configuration
    command: python conf.py {{ansible_eth0.ipv4.address}}

在node-admin下执行：

ansible-playbook bigchain.yml

执行成功后，可以看到node1-node5的.bigchaindb里keyring均成功写入。

• 启动bigchainDB

任选一节点（如node1上）执行：

bigchaindb init

然后启动所有节点的bigchaindb

bigchaindb start

# 或者后台启动
nohup bigchaindb start > /dev/null 2>&1 &

# 启动全部
ansible bigchain -m shell -a "nohup bigchaindb start > /dev/null 2>&1 &"

# kill全部
ansible bigchain -m raw -a "kill -9 \$(ps -ef | grep bigchaindb | awk 'NR>1{print p}{p=\$2}')"

使用bigchaindb

首先安装bigchaindb的python driver

• git安装方式：

ansible bigchain -m command -a "apt-get install git -y"

ansible bigchain -m command -a "apt-get install libssl-dev -y"

ansible bigchain -m command -a "pip3 install --process-dependency-links git+https://github.com/bigchaindb/bigchaindb-driver.git"

• pip3安装方式：https://pypi.org/project/bigchaindb-driver/#install

ansible bigchain -m command -a "pip3 install bigchaindb-driver"

测试实例可以参考官网：https://docs.bigchaindb.com/projects/py-driver/en/latest/usage.html