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为 EOSIO MongoDB 插件搭建高可用集群

选型

系统：CentOS7。 正像大部分国人喜欢用免费的 Windows 旗舰版，采用 RedHat 社区版，既有“企业级待遇”，又免费。实在是解决选择恐惧症必备良药……

MongoDB：4.0.4。 4.0 之前的版本不支持一些类型转换的函数，后期使用起来很麻烦。举个例子：

$toDate

New in version 4.0.

文件系统：XFS。 4.0 已经抛弃 MMAPv1 Storage Engine，官方文档强烈建议
WiredTiger Storage Engine 和 XFS 配套使用。

With the WiredTiger storage engine, using XFS is strongly recommended for data bearing nodes to avoid performance issues that may occur when using EXT4 with WiredTiger.

副本数：1。 数据可以很容易重新获取，丢失的代价不高，所以副本不是很重要（有钱请搞三副本）。另外，目前 nodeos 较常把数据弄脏，在它本身没高可用时，不宜对数据库投入太多成本。

机器配置：某云服务器一台。 16 Cores，256G RAM，启动盘 10G，额外八个 1T Disk。

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$ lsblk
NAME   MAJ:MIN RM  SIZE RO TYPE MOUNTPOINT
sda      8:0    0   10G  0 disk 
└─sda1   8:1    0   10G  0 part /
sdb      8:16   0    1T  0 disk 
sdc      8:32   0    1T  0 disk 
sdd      8:48   0    1T  0 disk 
sde      8:64   0    1T  0 disk 
sdf      8:80   0    1T  0 disk 
sdg      8:96   0    1T  0 disk 
sdh      8:112  0    1T  0 disk 
sdi      8:128  0    1T  0 disk

环境配置

1. 设置 SE Linux

安装过程中，若您需要 reboot 系统，则每次 reboot 之后都要做一次：

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setenforce Permissive

2. 关闭 TPH

以下命令不是持久化改变，但比较容易说明改了啥，仅供参考：

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echo never > /sys/kernel/mm/transparent_hugepage/enabled
echo never > /sys/kernel/mm/transparent_hugepage/defrag

根据 Disable Transparent Huge Pages (THP)，真正使用的是：

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mkdir -p /etc/tuned/no-thp

echo '[main]
include=virtual-guest

[vm]
transparent_hugepages=never' > /etc/tuned/no-thp/tuned.conf

tuned-adm profile no-thp

3. TCP 优化

以下命令不是持久化改变，但比较容易说明优化了啥，仅供参考：

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echo 120 > /proc/sys/net/ipv4/tcp_keepalive_time
echo 3 > /proc/sys/net/ipv4/tcp_fin_timeout
echo 3 > /proc/sys/net/ipv4/tcp_orphan_retries

真正使用的是：

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FILE=/etc/sysctl.conf
cp $FILE ${FILE}_`date +%Y%m%d%H%M`

KEY=tcp_keepalive_time
VALUE=120

egrep "net.ipv4.$KEY" $FILE && sed -i -c "s/net\.ipv4\.$KEY.*/net\.ipv4\.$KEY = $VALUE/g" $FILE || echo "net.ipv4.$KEY = $VALUE" >> $FILE

VALUE=3
KEY=tcp_fin_timeout

egrep "net.ipv4.$KEY" $FILE && sed -i -c "s/net\.ipv4\.$KEY.*/net\.ipv4\.$KEY = $VALUE/g" $FILE || echo "net.ipv4.$KEY = $VALUE" >> $FILE

KEY=tcp_orphan_retries

egrep "net.ipv4.$KEY" $FILE && sed -i -c "s/net\.ipv4\.$KEY.*/net\.ipv4\.$KEY = $VALUE/g" $FILE || echo "net.ipv4.$KEY = $VALUE" >> $FILE

sysctl -p 2>/tmp/sysctl.tmp

安装步骤

1. 全局设置

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PASSWORD=MEETONE_FAKE_PASSWORD

PREFIX=/disk
BIND_IP=10.140.0.10
D_PORT=17089
CS_PORT=17088
S_PORT=17087
NUM_SHARD=7

2. 防火墙例外

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semanage port -a -t mongod_port_t -p tcp 17087-17095

3. 分区

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yum install -y xfsprogs

function InitDisk {
  umount ${PREFIX}*
  sed -i "s:^LABEL=${PREFIX}:#LABEL=${PREFIX}:" /etc/fstab
  i=0
  for drv in {b..i}; do
    /sbin/parted /dev/sd"$drv" -s mklabel gpt mkpart primary 2048s 100%
    sleep 1
    mkfs.xfs -f -b size=4096 -d su=64k,sw=4,agcount=2000 /dev/sd"$drv"1
    xfs_admin -L ${PREFIX}$i /dev/sd"$drv"1
    mkdir -p ${PREFIX}$i
    echo "LABEL=${PREFIX}$i ${PREFIX}$i xfs rw,noatime,nodiratime,allocsize=16M,inode64,logbsize=256k,delaylog,nobarrier,nolargeio,swalloc 0 0" >> /etc/fstab

    i=$[i+1]
  done
  mount -a
}

InitDisk

4. 安装 MongoDB Community Edition

参考官网的安装文档：Install MongoDB Community Edition on Red Hat Enterprise or CentOS Linux

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echo '[mongodb-org-4.0]
name=MongoDB Repository
baseurl=https://repo.mongodb.org/yum/redhat/$releasever/mongodb-org/4.0/x86_64/
gpgcheck=1
enabled=1
gpgkey=https://www.mongodb.org/static/pgp/server-4.0.asc' > /etc/yum.repos.d/mongodb-org-4.0.repo

yum install -y mongodb-org

echo 'exclude=mongodb-org,mongodb-org-server,mongodb-org-shell,mongodb-org-mongos,mongodb-org-tools' >> /etc/yum.conf

5. 初始化数据库目录

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function InitDir {
  rm -rf ${PREFIX}0/mongod_conf_data ${PREFIX}0/mongo_log
  for ((i = 1; i <= $NUM_SHARD; ++i)); do
    rm -rf ${PREFIX}$i/mongo*
  done

  mkdir -p ${PREFIX}0/mongod_conf_data
  chown -R mongod. ${PREFIX}0/mongod_conf_data
  mkdir -p ${PREFIX}0/mongo_log
  chown -R mongod. ${PREFIX}0/mongo_log
  for ((i = 1; i <= $NUM_SHARD; ++i)); do
    mkdir -p ${PREFIX}$i/mongod_data
    chown mongod. ${PREFIX}$i/mongo*
  done
}

InitDir

6. 配置 MongoD 分片服务器

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function CreateShardConfig {
  for ((i = 1; i <= $NUM_SHARD; ++i)); do
    echo "shardsvr=true
replSet=shard$i
bind_ip=127.0.0.1,$BIND_IP
port=$[D_PORT+i-1]
dbpath=${PREFIX}$i/mongod_data
logpath=${PREFIX}0/mongo_log/shard$i.log
pidfilepath=/var/run/mongodb/mongod_shard$i.pid
logappend=true
logRotate=reopen
fork=true
wiredTigerCacheSizeGB=10
#keyFile=/etc/mongodb-keyfile
#verbose=true
directoryperdb=true
wiredTigerDirectoryForIndexes=true" > /etc/mongod_shard$i.conf
    chown mongod. /etc/mongod_shard$i.conf
  done
}

function CreateShardService {
  for ((i = 1; i <= $NUM_SHARD; ++i)); do
    echo "[Unit]
Description=MongoD
After=network.target
Documentation=https://docs.mongodb.org/manual

[Service]
User=mongod
Group=mongod
Environment=\"OPTIONS=-f /etc/mongod_shard$i.conf\"
EnvironmentFile=-/etc/sysconfig/mongod
ExecStart=/usr/bin/mongod \$OPTIONS
ExecStartPre=/usr/bin/mkdir -p /var/run/mongodb
ExecStartPre=/usr/bin/chown mongod:mongod /var/run/mongodb
ExecStartPre=/usr/bin/chmod 0755 /var/run/mongodb
PermissionsStartOnly=true
PIDFile=/var/run/mongodb/mongod_shard$i.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 mongod as specified in
# http://docs.mongodb.org/manual/reference/ulimit/#recommended-settings

[Install]
WantedBy=multi-user.target" > /usr/lib/systemd/system/mongod_shard$i.service
  done

  systemctl daemon-reload
}

function InitShard {
  SH=/tmp/mongod_shard.sh
  echo "" > $FILE
  for ((i = 1; i <= $NUM_SHARD; ++i)); do
    PORT=$[D_PORT+i-1]
    echo "echo \"rs.initiate({_id: 'shard$i', members:[{_id: 0, host: '$BIND_IP:$PORT'}]})\" | mongo --host 127.0.0.1 --port $PORT" >> $SH
  done
  bash $SH
}

function CreateShardUser {
  JS=/tmp/mongod_shard.js

  echo "use admin;
db.createUser({ \"user\": \"MongoAdmin\", \"pwd\": \"${PASSWORD}\", \"roles\": [\"root\"]});
cfg = rs.conf();
cfg.members[0].priority = 10;
rs.reconfig(cfg);" > $JS

  for ((i = 1; i <= $NUM_SHARD; ++i)); do
    mongo --port $[CS_PORT+i-1] < $JS
  done
}

CreateShardConfig
CreateShardService
for ((i = 1; i <= $NUM_SHARD; ++i)); do systemctl restart mongod_shard$i.service; done
InitShard
CreateShardUser

7. 配置 MongDB Config Server

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function CreateConfigServerConfig {
  FILE=/etc/mongod.conf

  echo "replSet=csReplSet
configsvr=true
bind_ip=127.0.0.1,$BIND_IP
port=$CS_PORT
dbpath=${PREFIX}0/mongod_conf_data
logpath=${PREFIX}0/mongo_log/config.log
pidfilepath=/var/run/mongodb/mongod.pid
logappend=true
logRotate=reopen
fork=true
#keyFile=/etc/mongodb-keyfile" > $FILE

  chown mongod. $FILE
}

function CreateConfigServerService {
  echo '[Unit]
Description=MongoCS
After=network.target
Documentation=https://docs.mongodb.org/manual

[Service]
User=mongod
Group=mongod
Environment="OPTIONS=-f /etc/mongod.conf"
EnvironmentFile=-/etc/sysconfig/mongod
ExecStart=/usr/bin/mongod $OPTIONS
ExecStartPre=/usr/bin/mkdir -p /var/run/mongodb
ExecStartPre=/usr/bin/chown mongod:mongod /var/run/mongodb
ExecStartPre=/usr/bin/chmod 0755 /var/run/mongodb
PermissionsStartOnly=true
PIDFile=/var/run/mongodb/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 mongod as specified in
# http://docs.mongodb.org/manual/reference/ulimit/#recommended-settings

[Install]
WantedBy=multi-user.target' > /usr/lib/systemd/system/mongod.service

  systemctl daemon-reload
}

CreateConfigServerConfig
CreateConfigServerService

systemctl restart mongod.service

sleep 5
echo "rs.initiate({_id: 'csReplSet', members:[{_id: 0, host: '$BIND_IP:$CS_PORT'}]})" | mongo --port $CS_PORT
echo "use admin;
db.createUser({ \"user\": \"MongoAdmin\", \"pwd\": \"${PASSWORD}\", \"roles\": [\"root\"]});" | mongo --port $CS_PORT

8. 配置 MongS

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function CreateMongoSConfig {
  FILE=/etc/mongos.conf

  echo "configdb=csReplSet/$BIND_IP:$CS_PORT
bind_ip_all=true
port=17087
logpath=${PREFIX}0/mongos_log/mongos.log
pidfilepath=/var/run/mongodb/mongos.pid
logappend=true
logRotate=reopen
fork=true
#keyFile=/etc/mongodb-keyfile" > $FILE

  chown mongod. $FILE

  mkdir -p ${PREFIX}0/mongos_log
  chown -R mongod. ${PREFIX}0/mongos_log
}

function CreateMongoSService {
  echo '[Unit]
Description=MongoS
After=network.target
Documentation=https://docs.mongodb.org/manual

[Service]
User=mongod
Group=mongod
Environment="OPTIONS=-f /etc/mongos.conf"
EnvironmentFile=-/etc/sysconfig/mongod
ExecStart=/usr/bin/mongos $OPTIONS
ExecStartPre=/usr/bin/mkdir -p /var/run/mongodb
ExecStartPre=/usr/bin/chown mongod:mongod /var/run/mongodb
ExecStartPre=/usr/bin/chmod 0755 /var/run/mongodb
PermissionsStartOnly=true
PIDFile=/var/run/mongodb/mongos.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 mongod as specified in
# http://docs.mongodb.org/manual/reference/ulimit/#recommended-settings

[Install]
WantedBy=multi-user.target' > /usr/lib/systemd/system/mongos.service

  systemctl daemon-reload
}

function AddShards {
  FILE=/tmp/mongo_add_shards.js
  echo "use admin;" > $FILE
  for ((i = 1; i <= $NUM_SHARD; ++i)); do
    echo "db.runCommand({addshard:\"shard$i/$BIND_IP:$[D_PORT+i-1]\"});" >> $FILE
  done

  mongo --port $S_PORT < $FILE
}

CreateMongoSConfig
CreateMongoSService

systemctl restart mongos.service

AddShards

9. 【可选】配置 keyfile

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function ConfigKeyfile {
  FILE=/etc/mongodb-keyfile
  openssl rand -base64 745 > $FILE
  chown mongod. $FILE
  chmod 600 $FILE

  grep -P '^#keyFile' /etc/mongod*.conf  &&  sed -i 's/#keyFile/keyFile/g' /etc/mongod*.conf

  grep -P '^#keyFile' /etc/mongos.conf  &&  sed -i 's/#keyFile/keyFile/g' /etc/mongos.conf
}

function RestartMongo {
  systemctl restart mongod.service
  for ((i = 1; i <= $NUM_SHARD; ++i)); do
    systemctl restart mongod_shard$i.service;
  done
  systemctl restart mongos.service
}

ConfigKeyfile
RestartMongo

10. 【可选】配置集合和创建索引

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use EOS
db.action_traces.createIndex({"act.account": 1, "_id":1},{background: true, sparse: true})
db.action_traces.createIndex({"act.name": 1, "_id":1},{background: true, sparse: true})
db.action_traces.createIndex({"act.data.receiver": 1, "_id":1},{background: true, sparse: true})
db.action_traces.createIndex({"act.data.from": 1, "_id":1},{background: true, sparse: true})
db.action_traces.createIndex({"act.data.to": 1, "_id":1},{background: true, sparse: true})
db.action_traces.createIndex({"act.data.name": 1, "_id":1},{background: true, sparse: true})
db.action_traces.createIndex({"act.data.voter": 1, "_id":1},{background: true, sparse: true})
db.action_traces.createIndex({"act.authorization.actor": 1, "_id":1},{background: true, sparse: true})
db.action_traces.createIndex({"receipt.receiver": 1, "_id":1},{background: true, sparse: true})

db.action_traces.createIndex({"block_num": 1, "_id":1},{background: true})
db.action_traces.createIndex({"block_time": 1, "_id":1},{background: true})

db.transaction_traces.createIndex({"id": 1, "_id":1},{background: true})

sh.enableSharding("EOS")
sh.shardCollection("EOS.action_traces", {"_id" : 1},  true)
sh.shardCollection("EOS.transaction_traces", {"_id" : 1},  true)

11. 【可选】安装 EOSIO 1.5

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wget https://github.com/eosio/eos/releases/download/v1.5.0/eosio-1.5.0-1.el7.x86_64.rpm
rpm -ivh ./eosio-1.5.0-1.el7.x86_64.rpm --nodeps
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