【Linux】MongoDB 集群部署（二进制方式）

# 创建安装目录、运行目录、pid目录、数据目录、配置目录、日志目录
mkdir -p /data/mongodb4-install /data/mongodb4/bin /data/mongodb4/run /data/mongodb4/data /data/mongodb4/conf /data/mongodb4/log

cd /data/mongodb4-install
wget https://fastdl.mongodb.org/linux/mongodb-linux-x86_64-rhel70-4.2.25.tgz

cd /data/mongodb4-install
 
# 解压文件
tar -xzf mongodb-linux-x86_64-rhel70-4.2.25.tgz
 
# 拷贝可执行文件
cp mongodb-linux-x86_64-rhel70-4.2.25/bin/* /data/mongodb4/bin/
 
# 拷贝配置文件（文件内容见附录）
cp /data/mongodb4-install/mongod.conf /data/mongodb4/conf/mongod.conf
 
# 拷贝启动文件（文件内容见附录）
cp /data/mongodb4-install/mongod.service /usr/lib/systemd/system/mongod.service

# 创建用户、用户主
groupadd mongod
useradd -g mongod mongod
 
# 修改目录属主
chown -R mongod:mongod /data/mongodb4
 
# 可以为 mongod 设置密码
# passwd mongod 或 echo <new_password> | passwd --stdin mongod

# 分别在 root 用户和 mongod 用户下执行
cat >> ~/.bashrc  <<EOF
export PATH=$PATH:/data/mongodb4/bin
EOF
############################################################################
tail -5 ~/.bashrc && source ~/.bashrc

ldd /data/mongodb4/bin/mongod | grep "not found"
# 如果返回的结果为空，则可以忽略后续步骤
# 如果返回的结果如下，则需要执行后续步骤
libcrypto.so.10 => not found
libssl.so.10 => not found
 
cd /data/mongodb4-install
 
# 下载 openssl 源码
wget -O OpenSSL_1_0_2n.tgz https://codeload.github.com/openssl/openssl/tar.gz/refs/tags/OpenSSL_1_0_2n
 
# 解压文件
tar -xzf OpenSSL_1_0_2n.tgz && cd openssl-OpenSSL_1_0_2n
 
# 源码编译
mkdir -p /usr/local/openssl_1.0.2
./config shared --prefix=/usr/local/openssl_1.0.2
make && make install
 
cp -p /usr/local/openssl_1.0.2/lib/libssl.so /lib64/libssl.so.10
cp -p /usr/local/openssl_1.0.2/lib/libcrypto.so /lib64/libcrypto.so.10
 
# 再次检查动态库文件
ldd /data/mongodb4/bin/mongod | grep "not found"

#重新加载
systemctl daemon-reload
 
#启动服务
systemctl start mongod.service
 
#查看服务状态
systemctl status mongod.service
 
#设置服务自启
systemctl enable mongod.service

# 执行 mongo 命令
mongo
 
# 连接到任何一个节点，执行初始化
rs.initiate( {
   _id : "prod01",
   members: [
      { _id: 0, host: "<节点一IP>:27017" },
      { _id: 1, host: "<节点二IP>:27017" },
      { _id: 2, host: "<节点三IP>:27017" }
   ]
})
 
# 注意：其他服务无法解析主机名，请使用节点IP进行初始化，否则业务服务会有如下报错：
panic: server selection error: server selection timeout, current topology: { Type: ReplicaSetNoPrimary, Servers: [{ Addr: kylin-test-00003:27017, Type: Unknown, Last error: connection() error occurred during connection handshake: dial tcp: lookup kylin-test-00003 on 10.96.0.10:53: no such host }, { Addr: kylin-test-00004:27017, Type: Unknown, Last error: connection() error occurred during connection handshake: dial tcp: lookup kylin-test-00004 on 10.96.0.10:53: no such host }, { Addr: kylin-test-00005:27017, Type: Unknown, Last error: connection() error occurred during connection handshake: dial tcp: lookup kylin-test-00005 on 10.96.0.10:53: no such host }, ] }
 
# 查看副本集配置、状态
rs.conf()
rs.status()
 
# 其他必要的初始化处理

# 主库服务器执行，切换至 root 用户
mkdir /data/backup && touch /data/backup/backup.sh
cat > /data/backup/backup.sh <<EOF
#!/bin/bash
data_time=\$(date +%F_%H)
save_time=7
/data/mongodb4/bin/mongodump -u<your_user> -p<your_passwd> --authenticationDatabase user_log --gzip -o /data/backup/\${data_time}mongo
find /data/backup -maxdepth 1 -type d -mtime +\${save_time} | xargs rm -rf
EOF
############################################################################
echo "00 */6 * * * bash /data/backup/backup.sh" > /var/spool/cron/root
crontab -l

# where to write logging data.
systemLog:
  quiet: true
  destination: file
  logAppend: true
  path: /data/mongodb4/log/mongod.log
 
# Where and how to store data.
storage:
  dbPath: /data/mongodb4/data
  journal:
    enabled: true
    commitIntervalMs: 500
 
# how the process runs
processManagement:
  fork: true  # fork and run in background
  pidFilePath: /data/mongodb4/run/mongod.pid  # location of pidfile
  timeZoneInfo: /usr/share/zoneinfo
 
# network interfaces
net:
  port: 27017
  bindIp: 0.0.0.0  # Enter 0.0.0.0,:: to bind to all IPv4 and IPv6 addresses or, alternatively, use the net.bindIpAll setting.
 
#security:
#  authorization: enabled
 
#replca set
replication:
  replSetName: "prod01"

[Unit]
Description=MongoDB Database Server
Documentation=https://docs.mongodb.org/manual
After=network.target
 
[Service]
User=mongod
Group=mongod
Environment="OPTIONS=-f /data/mongodb4/conf/mongod.conf"
EnvironmentFile=-/etc/sysconfig/mongod
ExecStart=/data/mongodb4/bin/mongod $OPTIONS
PermissionsStartOnly=true
PIDFile=/data/mongodb4/run/mongod.pid
Type=forking
# file size
LimitFSIZE=infinity
# cpu time
LimitCPU=infinity
# virtual memory size
LimitAS=infinity
# open files
LimitNOFILE=64000
# processes/threads
LimitNPROC=64000
# locked memory
LimitMEMLOCK=infinity
# total threads (user+kernel)
TasksMax=infinity
TasksAccounting=false
# Recommended limits for for mongod as specified in
# http://docs.mongodb.org/manual/reference/ulimit/#recommended-settings
 
[Install]
WantedBy=multi-user.target