本地搭建一个MongoDB副本集

mkdir -p /data/mongo/27017 /data/mongo/27018 /data/mongo/27019
mkdir -p /var/log/mongodb

sudo mongod --replSet rs-local-test --dbpath /data/mongo/27017 --port 27017 --logpath /var/log/mongodb/27017.log --fork
sudo mongod --replSet rs-local-test --dbpath /data/mongo/27018 --port 27018 --logpath /var/log/mongodb/27018.log --fork
sudo mongod --replSet rs-local-test --dbpath /data/mongo/27019 --port 27019 --logpath /var/log/mongodb/27019.log --fork

mongostat --host 127.0.0.1 --port 27017  --discover

rs.initiate({
     "_id":"rs-local-test",
     "members":[
         {"_id":0,"host":"127.0.0.1:27017"},
         {"_id":1,"host":"127.0.0.1:27018"},
         {"_id":2,"host":"127.0.0.1:27019"}
    ]
})