몽고디비 클러스터

/etc/m0d.conf

m0d.conf

m1d.conf

m2d.conf

 

# mongod.conf

# for documentation of all options, see:
#   http://docs.mongodb.org/manual/reference/configuration-options/

# Where and how to store data.
storage:
  dbPath: /mongodb/s0
  directoryPerDB: true
  journal:
    enabled: true

#  engine:
#  wiredTiger:

# where to write logging data.
systemLog:
  destination: file
  logAppend: true
  path: /var/log/mongodb/m0d.log

# network interfaces
net:
  port: 27010
  bindIp: 0.0.0.0


# how the process runs
processManagement:
  timeZoneInfo: /usr/share/zoneinfo

#security:

#operationProfiling:

replication:
  replSetName: "mainSet"

#sharding:

## Enterprise-Only Options:

#auditLog:

#snmp:

/lib/systemd/system/m0d.service

m0d.service

m1d.service

m2d.service

 

[Unit]
Description=MongoDB Database Server
Documentation=https://docs.mongodb.org/manual
After=network-online.target
Wants=network-online.target

[Service]
User=mongodb
Group=mongodb
EnvironmentFile=-/etc/default/mongod
# Environment="MONGODB_CONFIG_OVERRIDE_NOFORK=1"
ExecStart=/usr/bin/mongod --config /etc/m0d.conf
RuntimeDirectory=mongodb
# 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
# https://docs.mongodb.com/manual/reference/ulimit/#recommended-ulimit-settings

[Install]
WantedBy=multi-user.target

sudo chown -R mongodb:mongodb /mongodb/s0

 

sudo systemctl daemon-reload

 

 

 

 

I fix it by adding parameter suffix "?readPreference=secondary&directConnection=true" to connection string, so the connection string look like,

"mongodb://name:passwd@ip:port?readPreference=secondary&directConnection=true"

https://stackoverflow.com/a/72877483

nodejs or golang client can not access mongodb, however, mongsh can connect and read with same auth setting

 

not primary and secondaryOk=false

 

db.getMongo().setReadPref("primaryPreferred")

rs.initiate(
   {
      _id: "mainSet",
      version: 1,
      members: [
         { _id: 0, host : "[ip]:27010" },
         { _id: 1, host : "[ip]:27011" },
         { _id: 2, host : "[ip]:27012" },
      ]
   }
)

 

rs.secondaryOk()