服務器信息
| ip | 系統 | 配置 | 服務 | 目錄 |
|---|---|---|---|---|
| 172.24.32.201 | centos7.7 | 2c4g | mongo-primary | /var/lib/mongo (the data directory) /var/log/mongodb (the log directory) |
| 172.24.32.201 | centos7.7 | 2c4g | mongo-secondary | /var/lib/mongo27018 (the data directory) /var/log/mongodb27018 (the log directory) |
| 172.24.32.201 | centos7.7 | 2c4g | mongo-secondary | /var/lib/mongo27019 (the data directory) /var/log/mongodb27019 (the log directory) |
由于config、mongos、mongod全部在一臺服務器上。所以這里用目錄區分
整理下服務目錄和文件名
這里先清空之前的架構為一主兩從的三副本集,整理下目錄名和文件名
systemctl stop mongod
systemctl stop mongod27018
systemctl stop mongod27019
rm -rf /var/lib/mongo/*
rm -rf /var/lib/mongo2701*/*
mongo27017的信息
- 配置文件
/etc/mongod27017.conf - 啟動文件
/usr/lib/systemd/system/mongod27017.service
mongo27018的信息
- 配置文件
/etc/mongod27018.conf - 啟動文件
/usr/lib/systemd/system/mongod27018.service
mongo27019的信息
- 配置文件
/etc/mongod27019.conf - 啟動文件
/usr/lib/systemd/system/mongod27019.service
啟動
systemctl daemon-reload
systemctl start mongod27017
systemctl start mongod27018
systemctl start mongod27019
進入并創建副本集
mongo 127.0.0.1:27017/admin
config = {
_id : "lugotestrepl",
members : [
{_id : 0, host : "127.0.0.1:27017" , priority:33},
{_id : 1, host : "127.0.0.1:27018" , priority:2},
{_id : 2, host : "127.0.0.1:27019" , priority:2}
]
}
rs.initiate(config);
副本集狀態
lugotestrepl:PRIMARY> rs.status();
{
"set" : "lugotestrepl",
"date" : ISODate("2020-05-15T06:50:06.639Z"),
"myState" : 1,
"term" : NumberLong(2),
"syncingTo" : "",
"syncSourceHost" : "",
"syncSourceId" : -1,
"heartbeatIntervalMillis" : NumberLong(2000),
"optimes" : {
"lastCommittedOpTime" : {
"ts" : Timestamp(1589525404, 1),
"t" : NumberLong(2)
},
"readConcernMajorityOpTime" : {
"ts" : Timestamp(1589525404, 1),
"t" : NumberLong(2)
},
"appliedOpTime" : {
"ts" : Timestamp(1589525404, 1),
"t" : NumberLong(2)
},
"durableOpTime" : {
"ts" : Timestamp(1589525404, 1),
"t" : NumberLong(2)
}
},
"members" : [
{
"_id" : 0,
"name" : "127.0.0.1:27017",
"health" : 1,
"state" : 1,
"stateStr" : "PRIMARY",
"uptime" : 1569,
"optime" : {
"ts" : Timestamp(1589525404, 1),
"t" : NumberLong(2)
},
"optimeDate" : ISODate("2020-05-15T06:50:04Z"),
"syncingTo" : "",
"syncSourceHost" : "",
"syncSourceId" : -1,
"infoMessage" : "",
"electionTime" : Timestamp(1589524572, 1),
"electionDate" : ISODate("2020-05-15T06:36:12Z"),
"configVersion" : 1,
"self" : true,
"lastHeartbeatMessage" : ""
},
{
"_id" : 1,
"name" : "127.0.0.1:27018",
"health" : 1,
"state" : 2,
"stateStr" : "SECONDARY",
"uptime" : 855,
"optime" : {
"ts" : Timestamp(1589525404, 1),
"t" : NumberLong(2)
},
"optimeDurable" : {
"ts" : Timestamp(1589525404, 1),
"t" : NumberLong(2)
},
"optimeDate" : ISODate("2020-05-15T06:50:04Z"),
"optimeDurableDate" : ISODate("2020-05-15T06:50:04Z"),
"lastHeartbeat" : ISODate("2020-05-15T06:50:05.477Z"),
"lastHeartbeatRecv" : ISODate("2020-05-15T06:50:04.876Z"),
"pingMs" : NumberLong(0),
"lastHeartbeatMessage" : "",
"syncingTo" : "127.0.0.1:27017",
"syncSourceHost" : "127.0.0.1:27017",
"syncSourceId" : 0,
"infoMessage" : "",
"configVersion" : 1
},
{
"_id" : 2,
"name" : "127.0.0.1:27019",
"health" : 1,
"state" : 2,
"stateStr" : "SECONDARY",
"uptime" : 855,
"optime" : {
"ts" : Timestamp(1589525404, 1),
"t" : NumberLong(2)
},
"optimeDurable" : {
"ts" : Timestamp(1589525404, 1),
"t" : NumberLong(2)
},
"optimeDate" : ISODate("2020-05-15T06:50:04Z"),
"optimeDurableDate" : ISODate("2020-05-15T06:50:04Z"),
"lastHeartbeat" : ISODate("2020-05-15T06:50:05.477Z"),
"lastHeartbeatRecv" : ISODate("2020-05-15T06:50:04.755Z"),
"pingMs" : NumberLong(0),
"lastHeartbeatMessage" : "",
"syncingTo" : "127.0.0.1:27017",
"syncSourceHost" : "127.0.0.1:27017",
"syncSourceId" : 0,
"infoMessage" : "",
"configVersion" : 1
}
],
"ok" : 1
}
插入數據
創建用戶
db.createUser({
user: "admin",
pwd: "test123",
roles: ["root"]
});
插入數據
lugotestrepl:PRIMARY> db.movie.insert({"moviename":"大偵探福爾摩斯","points":"9.5"})
WriteResult({ "nInserted" : 1 })
查看數據
lugotestrepl:PRIMARY> db.movie.find().pretty();
{
"_id" : ObjectId("5ebe402573a048240cf0e087"),
"moviename" : "大偵探福爾摩斯",
"points" : "9.5"
}
{
"_id" : ObjectId("5ebe404173a048240cf0e088"),
"moviename" : "掠奪",
"points" : "9.2"
}
{
"_id" : ObjectId("5ebe405073a048240cf0e089"),
"moviename" : "搖滾黑幫",
"points" : "9.9"
}
{
"_id" : ObjectId("5ebe405b73a048240cf0e08a"),
"moviename" : "兩桿大煙槍",
"points" : "9.1"
}
{
"_id" : ObjectId("5ebe406873a048240cf0e08b"),
"moviename" : "殺死比爾",
"points" : "9.0"
}
至此，mongo27017~27018副本集重構完畢
架構為一主兩從。
搭建config副本集
mongodb3.4以后要求配置服務器也創建副本集，不然集群搭建不成功。
-------------------config21000目錄--------------------------
mkdir -p /var/log/mongodbconfig/
mkdir -p /var/lib/mongoconfig/config21000/data
mkdir -p /var/run/mongodbconfig21000/
chown -R mongod:mongod /var/log/mongodbconfig/ &&chmod 0755 /var/log/mongodbconfig/
chown -R mongod:mongod /var/lib/mongoconfig/config21000/data &&chmod 0755 /var/lib/mongoconfig/config21000/data
chown -R mongod:mongod /var/run/mongodbconfig21000/ &&chmod 0755 /var/run/mongodbconfig21000/
-------------------config21001目錄--------------------------
mkdir -p /var/lib/mongoconfig/config21001/data
mkdir -p /var/run/mongodbconfig21001/
chown -R mongod:mongod /var/lib/mongoconfig/config21001/data &&chmod 0755 /var/lib/mongoconfig/config21001/data
chown -R mongod:mongod /var/run/mongodbconfig21001/ &&chmod 0755 /var/run/mongodbconfig21001/
-------------------config21002目錄--------------------------
mkdir -p /var/lib/mongoconfig/config21002/data
mkdir -p /var/run/mongodbconfig21002/
chown -R mongod:mongod /var/lib/mongoconfig/config21002/data &&chmod 0755 /var/lib/mongoconfig/config21002/data
chown -R mongod:mongod /var/run/mongodbconfig21002/ &&chmod 0755 /var/run/mongodbconfig21002/
config的副本集文件結構
- 21000實例的配置文件
cat >>/etc/mongod/conf.d/config_21000.conf<<EOF
systemLog:
destination: file
logAppend: true
path: /var/log/mongodbconfig/configsvr21000.log
storage:
dbPath: /var/lib/mongoconfig/config21000/data
journal:
enabled: true
processManagement:
fork: true
pidFilePath: /var/run/mongodbconfig21000/configsvr.pid
net:
port: 21000
bindIp: 0.0.0.0
maxIncomingConnections: 20000
replication:
replSetName: lugotestreplconfig
sharding:
clusterRole: configsvr
security:
keyFile: /etc/mongokey/mongodb-keyfile
clusterAuthMode: keyFile
setParameter:
enableLocalhostAuthBypass: true
EOF
----------------------------------------------------------------------------
cat >>/usr/lib/systemd/system/mongodconfig21000.service<<EOF
[Unit]
Description=MongoDB Database Server
Documentation=https://docs.mongodb.org/manual
After=network.target
[Service]
User=mongod
Group=mongod
Environment="OPTIONS=-f /etc/mongod/conf.d/config_21000.conf"
ExecStart=/usr/bin/mongod $OPTIONS
#ExecStartPre=/usr/bin/mkdir -p /var/run/mongodb
#ExecStartPre=/usr/bin/chown mongod:mongod /var/run/mongodb
#ExecStartPre=/usr/bin/chmod 0755 /var/run/mongodb
PermissionsStartOnly=true
PIDFile=/var/run/mongodbconfig21000/mongod.pid
Type=forking
# file size
LimitFSIZE=infinity
# cpu time
LimitCPU=infinity
# virtual memory size
LimitAS=infinity
# open files
LimitNOFILE=64000
# processes/threads
LimitNPROC=64000
# locked memory
LimitMEMLOCK=infinity
# total threads (user+kernel)
TasksMax=infinity
TasksAccounting=false
# Recommended limits for for mongod as specified in
# http://docs.mongodb.org/manual/reference/ulimit/#recommended-settings
[Install]
WantedBy=multi-user.target
EOF
- 21001實例的配置文件
/etc/mongod/conf.d/config_21001.conf
/usr/lib/systemd/system/mongodconfig21001.service
- 21002實例的配置文件
/etc/mongod/conf.d/config_21002.conf
/usr/lib/systemd/system/mongodconfig21002.service
啟動config的三個實例
systemctl restart mongodconfig21001
systemctl restart mongodconfig21002
systemctl restart mongodconfig21000
進入實例，開始創建config副本集
mongo 127.0.0.1:21000
> config = {
... _id : "lugotestreplconfig",
... members : [
... {_id : 0, host : "127.0.0.1:21000" },
... {_id : 1, host : "127.0.0.1:21001" },
... {_id : 2, host : "127.0.0.1:21002" }
... ]
... }
{
"_id" : "lugotestreplconfig",
"members" : [
{
"_id" : 0,
"host" : "127.0.0.1:21000"
},
{
"_id" : 1,
"host" : "127.0.0.1:21001"
},
{
"_id" : 2,
"host" : "127.0.0.1:21002"
}
]
}
> rs.initiate(config)
{
"ok" : 1,
"$gleStats" : {
"lastOpTime" : Timestamp(1589527585, 1),
"electionId" : ObjectId("000000000000000000000000")
}
}
至此，config節點副本集搭建完成，這個節點主要存放集群信息
mongos搭建
搭建路由節點，這里搭建個單機的測試使用
- 配置文件
cat >>/etc/mongod/conf.d/mongos_22222.conf<<EOF
systemLog:
destination: file
logAppend: true
path: /var/log/mongodb/mongos22222.log
processManagement:
fork: true
pidFilePath: /var/run/mongodb/mongos22222.pid
net:
port: 22222
bindIp: 0.0.0.0
maxIncomingConnections: 20000
sharding:
configDB: lugotestreplconfig/172.24.32.201:21000,172.24.32.201:21001,172.24.32.201:21002
security:
keyFile: /etc/mongokey/mongodb-keyfile
clusterAuthMode: keyFile
setParameter:
enableLocalhostAuthBypass: true
EOF
- 啟動文件
cat >>/usr/lib/systemd/system/mongos22222.service<<EOF
[Unit]
Description=MongoDB Database Server
Documentation=https://docs.mongodb.org/manual
After=network.target
[Service]
User=mongod
Group=mongod
Environment="OPTIONS=-f /etc/mongod/conf.d/mongos_22222.conf"
ExecStart=/usr/bin/mongos $OPTIONS
#ExecStartPre=/usr/bin/mkdir -p /var/run/mongodb
#ExecStartPre=/usr/bin/chown mongod:mongod /var/run/mongodb
#ExecStartPre=/usr/bin/chmod 0755 /var/run/mongodb
PermissionsStartOnly=true
PIDFile=/var/run/mongodb/mongos22222.pid
Type=forking
# file size
LimitFSIZE=infinity
# cpu time
LimitCPU=infinity
# virtual memory size
LimitAS=infinity
# open files
LimitNOFILE=64000
# processes/threads
LimitNPROC=64000
# locked memory
LimitMEMLOCK=infinity
# total threads (user+kernel)
TasksMax=infinity
TasksAccounting=false
# Recommended limits for for mongod as specified in
# http://docs.mongodb.org/manual/reference/ulimit/#recommended-settings
[Install]
WantedBy=multi-user.target
EOF
啟動和開機自啟動mongos
systemctl start mongos22222
systemctl enable mongos22222
將先前部署的副本集升級為一個分片副本集群中的一個分片
進入mongos
mongo 127.0.0.1:22222/admin
創建賬號
mongos> db.createUser({
... user: "admin",
... pwd: "test123",
... roles: ["root"]
... });
Successfully added user: { "user" : "admin", "roles" : [ "root" ] }
mongos> db.auth('admin','test123')
1
分片
sh.addShard("lugotestrepl/127.0.0.1:27017,127.0.0.1:27018,127.0.0.1:27019")
查看信息
mongos> db.runCommand({ listshards : 1 });
{
"shards" : [
{
"_id" : "lugotestrepl",
"host" : "lugotestrepl/127.0.0.1:27017,127.0.0.1:27018,127.0.0.1:27019",
"state" : 1
}
],
"ok" : 1,
"operationTime" : Timestamp(1589528828, 1),
"$clusterTime" : {
"clusterTime" : Timestamp(1589528828, 1),
"signature" : {
"hash" : BinData(0,"9kplNbREI1p373yIwx9vXICQy1w="),
"keyId" : NumberLong("6826969049499435034")
}
}
}
在分片副本集中，加入第二個副本集分片，并驗證分片集群狀態
創建第二個副本集，并加入分片
- mongod37017配置文件
/etc/mongod37017.conf - 啟動文件
/usr/lib/systemd/system/mongod37017.service
mongo37018的信息
- 配置文件
/etc/mongod37018.conf - 啟動文件
/usr/lib/systemd/system/mongod37019.service
mongo37019的信息
- 配置文件
/etc/mongod37019.conf - 啟動文件
usr/lib/systemd/system/mongod37019.service
啟動mongod37017、mongod37018、mongod37019節點
systemctl start mongod37017
systemctl start mongod37018
systemctl start mongod37019
systemctl enable mongod37017
systemctl enable mongod37018
systemctl enable mongod37019
進入37017節點，創建副本集
mongo 127.0.0.1:37017/admin
config = {
_id : "shard2",
members : [
{_id : 0, host : "127.0.0.1:37017" , priority:33},
{_id : 1, host : "127.0.0.1:37018" , priority:2},
{_id : 2, host : "127.0.0.1:37019" , priority:2}
]
}
初始化，并查看狀態
> rs.initiate(config);
{ "ok" : 1 }
狀態
shard2:PRIMARY> rs.status();
{
"set" : "shard2",
"date" : ISODate("2020-05-15T08:25:25.375Z"),
"myState" : 1,
"term" : NumberLong(1),
"syncingTo" : "",
"syncSourceHost" : "",
"syncSourceId" : -1,
"heartbeatIntervalMillis" : NumberLong(2000),
"optimes" : {
"lastCommittedOpTime" : {
"ts" : Timestamp(1589531119, 1),
"t" : NumberLong(1)
},
"readConcernMajorityOpTime" : {
"ts" : Timestamp(1589531119, 1),
"t" : NumberLong(1)
},
"appliedOpTime" : {
"ts" : Timestamp(1589531119, 1),
"t" : NumberLong(1)
},
"durableOpTime" : {
"ts" : Timestamp(1589531119, 1),
"t" : NumberLong(1)
}
},
"members" : [
{
"_id" : 0,
"name" : "127.0.0.1:37017",
"health" : 1,
"state" : 1,
"stateStr" : "PRIMARY",
"uptime" : 555,
"optime" : {
"ts" : Timestamp(1589531119, 1),
"t" : NumberLong(1)
},
"optimeDate" : ISODate("2020-05-15T08:25:19Z"),
"syncingTo" : "",
"syncSourceHost" : "",
"syncSourceId" : -1,
"infoMessage" : "could not find member to sync from",
"electionTime" : Timestamp(1589531097, 1),
"electionDate" : ISODate("2020-05-15T08:24:57Z"),
"configVersion" : 1,
"self" : true,
"lastHeartbeatMessage" : ""
},
{
"_id" : 1,
"name" : "127.0.0.1:37018",
"health" : 1,
"state" : 2,
"stateStr" : "SECONDARY",
"uptime" : 37,
"optime" : {
"ts" : Timestamp(1589531119, 1),
"t" : NumberLong(1)
},
"optimeDurable" : {
"ts" : Timestamp(1589531119, 1),
"t" : NumberLong(1)
},
"optimeDate" : ISODate("2020-05-15T08:25:19Z"),
"optimeDurableDate" : ISODate("2020-05-15T08:25:19Z"),
"lastHeartbeat" : ISODate("2020-05-15T08:25:23.540Z"),
"lastHeartbeatRecv" : ISODate("2020-05-15T08:25:24.791Z"),
"pingMs" : NumberLong(0),
"lastHeartbeatMessage" : "",
"syncingTo" : "127.0.0.1:37017",
"syncSourceHost" : "127.0.0.1:37017",
"syncSourceId" : 0,
"infoMessage" : "",
"configVersion" : 1
},
{
"_id" : 2,
"name" : "127.0.0.1:37019",
"health" : 1,
"state" : 2,
"stateStr" : "SECONDARY",
"uptime" : 37,
"optime" : {
"ts" : Timestamp(1589531119, 1),
"t" : NumberLong(1)
},
"optimeDurable" : {
"ts" : Timestamp(1589531119, 1),
"t" : NumberLong(1)
},
"optimeDate" : ISODate("2020-05-15T08:25:19Z"),
"optimeDurableDate" : ISODate("2020-05-15T08:25:19Z"),
"lastHeartbeat" : ISODate("2020-05-15T08:25:23.540Z"),
"lastHeartbeatRecv" : ISODate("2020-05-15T08:25:24.754Z"),
"pingMs" : NumberLong(0),
"lastHeartbeatMessage" : "",
"syncingTo" : "127.0.0.1:37017",
"syncSourceHost" : "127.0.0.1:37017",
"syncSourceId" : 0,
"infoMessage" : "",
"configVersion" : 1
}
],
"ok" : 1
}
分片
進入mongos
[root@test02 run]# mongo 127.0.0.1:22222/admin
MongoDB shell version v3.6.18
connecting to: mongodb://127.0.0.1:22222/admin?gssapiServiceName=mongodb
Implicit session: session { "id" : UUID("098a5b12-bd06-4812-aa68-e2a0edb19136") }
MongoDB server version: 3.6.18
mongos> db.auth('admin','test123')
1
分片指令
sh.addShard("shard2/127.0.0.1:37017,127.0.0.1:37018,127.0.0.1:37019")
分片成功
1
mongos> sh.addShard("shard2/127.0.0.1:37017,127.0.0.1:37018,127.0.0.1:37019")
{
"shardAdded" : "shard2",
"ok" : 1,
"operationTime" : Timestamp(1589531264, 7),
"$clusterTime" : {
"clusterTime" : Timestamp(1589531264, 7),
"signature" : {
"hash" : BinData(0,"Ks/rUayKm+xbS1OLr04B2DAt2g4="),
"keyId" : NumberLong("6826969049499435034")
}
}
}
查看分片狀態
mongos> db.runCommand({ listshards : 1 });
{
"shards" : [
{
"_id" : "lugotestrepl",
"host" : "lugotestrepl/127.0.0.1:27017,127.0.0.1:27018,127.0.0.1:27019",
"state" : 1
},
{
"_id" : "shard2",
"host" : "shard2/127.0.0.1:37017,127.0.0.1:37018,127.0.0.1:37019",
"state" : 1
}
],
"ok" : 1,
"operationTime" : Timestamp(1589531316, 1),
"$clusterTime" : {
"clusterTime" : Timestamp(1589531316, 1),
"signature" : {
"hash" : BinData(0,"EoOJLcpnWACjeMa+VNRBmcg2UOE="),
"keyId" : NumberLong("6826969049499435034")
}
}
}
對先前創建的數據表進行分片操作，并驗證數據的分布狀態
指定lugotest這個庫分片生效
db.runCommand( { enablesharding :"lugotest"});
結果
mongos> db.runCommand( { enablesharding :"lugotest"});
{
"ok" : 1,
"operationTime" : Timestamp(1589532403, 5),
"$clusterTime" : {
"clusterTime" : Timestamp(1589532403, 5),
"signature" : {
"hash" : BinData(0,"UkLPinHxT7rZ9EOxSNVTB4EHi+Q="),
"keyId" : NumberLong("6826969049499435034")
}
}
}
指定數據庫lugotest里需要分片的集合test和片鍵id
db.runCommand( { shardcollection : "lugotest.moive",key : {points: "hashed"} } )
查看分片狀態
mongos> sh.status();
--- Sharding Status ---
sharding version: {
"_id" : 1,
"minCompatibleVersion" : 5,
"currentVersion" : 6,
"clusterId" : ObjectId("5ebe442e2923573eb3ecbdea")
}
shards:
{ "_id" : "lugotestrepl", "host" : "lugotestrepl/127.0.0.1:27017,127.0.0.1:27018,127.0.0.1:27019", "state" : 1 }
{ "_id" : "shard2", "host" : "shard2/127.0.0.1:37017,127.0.0.1:37018,127.0.0.1:37019", "state" : 1 }
active mongoses:
"3.6.18" : 1
autosplit:
Currently enabled: yes
balancer:
Currently enabled: yes
Currently running: no
Failed balancer rounds in last 5 attempts: 0
Migration Results for the last 24 hours:
1 : Success
databases:
{ "_id" : "config", "primary" : "config", "partitioned" : true }
config.system.sessions
shard key: { "_id" : 1 }
unique: false
balancing: true
chunks:
lugotestrepl 1
{ "_id" : { "$minKey" : 1 } } -->> { "_id" : { "$maxKey" : 1 } } on : lugotestrepl Timestamp(1, 0)
{ "_id" : "lugotest", "primary" : "lugotestrepl", "partitioned" : true }
lugotest.test
shard key: { "id" : "hashed" }
unique: false
balancing: true
chunks:
lugotestrepl 2
shard2 2
{ "id" : { "$minKey" : 1 } } -->> { "id" : NumberLong("-4611686018427387902") } on : lugotestrepl Timestamp(3, 1)
{ "id" : NumberLong("-4611686018427387902") } -->> { "id" : NumberLong(0) } on : lugotestrepl Timestamp(3, 2)
{ "id" : NumberLong(0) } -->> { "id" : NumberLong("4611686018427387902") } on : shard2 Timestamp(3, 3)
{ "id" : NumberLong("4611686018427387902") } -->> { "id" : { "$maxKey" : 1 } } on : shard2 Timestamp(3, 4)
插入數據
mongos> for (var i = 1; i <=20; i++){
... db.test.insert({id: i, username: "U"});
... }
WriteResult({ "nInserted" : 1 })
mongos> db.test.stats();
{
"sharded" : true,
"capped" : false,
"warning" : "indexes don't all match - ok if ensureIndex is running",
"ns" : "lugotest.test",
"count" : 20,
"size" : 1000,
"storageSize" : 20480,
"totalIndexSize" : 24576,
"indexSizes" : {
"_id_" : 20480,
"id_hashed" : 4096
},
"avgObjSize" : 50,
"nindexes" : 2,
"nchunks" : 4,
"shards" : {
"lugotestrepl" : {
"ns" : "lugotest.test",
"size" : 300,
"shard2" : {
"ns" : "lugotest.test",
"size" : 700,
"count" : 14,
"avgObjSize" : 50,
"storageSize" : 4096,
"capped" : false,
"wiredTiger" : {
"metadata" : {
"formatVersion" : 1
可以看到，一個分片是6條數據，一個分片是14條數據
關閉第二個分片的所有節點，并驗證數據庫的可用性。
[root@test02 run]# systemctl stop mongod37017
[root@test02 run]# systemctl stop mongod37018
[root@test02 run]# systemctl stop mongod37019
mongos> use lugotest
switched to db lugotest
mongos> db.movie.find();
{ "_id" : ObjectId("5ebe402573a048240cf0e087"), "moviename" : "大偵探福爾摩斯", "points" : "9.5" }
{ "_id" : ObjectId("5ebe404173a048240cf0e088"), "moviename" : "掠奪", "points" : "9.2" }
{ "_id" : ObjectId("5ebe405073a048240cf0e089"), "moviename" : "搖滾黑幫", "points" : "9.9" }
{ "_id" : ObjectId("5ebe405b73a048240cf0e08a"), "moviename" : "兩桿大煙槍", "points" : "9.1" }
{ "_id" : ObjectId("5ebe406873a048240cf0e08b"), "moviename" : "殺死比爾", "points" : "9.0" }
mongos> db.test.find();
Error: error: {
"ok" : 0,
"errmsg" : "Could not find host matching read preference { mode: \"primary\" } for set shard2",
"code" : 133,
"codeName" : "FailedToSatisfyReadPreference",
"operationTime" : Timestamp(1589534845, 1),
"$clusterTime" : {
"clusterTime" : Timestamp(1589534867, 1),
"signature" : {
"hash" : BinData(0,"3pklCXoPiE8B7ateFALSmCsDdfM="),
"keyId" : NumberLong("6826969049499435034")
}
}
}
未分片的集合，且數據在未關閉的分片上，數據能正常使用
已分片的集合，數據不可查詢
重新啟用第二個分片的所有節點，使用 mongodump 備份數據庫中的測試數據。
備份
mongodump -h 127.0.0.1:22222 -u lugo -p test123 -d lugotest -o /data/mongodb_bak/20200512
清空lugotest的兩個集合
mongos> show collections;
movie
test
mongos> db.movie.drop()
true
mongos> db.test.drop()
true
還原數據
mongorestore -h 127.0.0.1:22222 -u lugo -p test123 --collection movie --db lugotest /data/mongodb_bak/20200512/lugotest/movie.bson
mongorestore -h 127.0.0.1:22222 -u lugo -p test123 --collection test --db lugotest /data/mongodb_bak/20200512/lugotest/test.bson
檢查數據
mongos> show collections;
movie
test
mongos> db.test.find();
{ "_id" : ObjectId("5ebe5eb9825f7f2e238543c8"), "id" : 2, "username" : "U" }
{ "_id" : ObjectId("5ebe5eb9825f7f2e238543d6"), "id" : 16, "username" : "U" }
{ "_id" : ObjectId("5ebe5eb9825f7f2e238543d7"), "id" : 17, "username" : "U" }
{ "_id" : ObjectId("5ebe5eb9825f7f2e238543c7"), "id" : 1, "username" : "U" }
{ "_id" : ObjectId("5ebe5eb9825f7f2e238543ca"), "id" : 4, "username" : "U" }
{ "_id" : ObjectId("5ebe5eb9825f7f2e238543cb"), "id" : 5, "username" : "U" }
{ "_id" : ObjectId("5ebe5eb9825f7f2e238543cd"), "id" : 7, "username" : "U" }
{ "_id" : ObjectId("5ebe5eb9825f7f2e238543cf"), "id" : 9, "username" : "U" }
{ "_id" : ObjectId("5ebe5eb9825f7f2e238543d0"), "id" : 10, "username" : "U" }
{ "_id" : ObjectId("5ebe5eb9825f7f2e238543d3"), "id" : 13, "username" : "U" }
{ "_id" : ObjectId("5ebe5eb9825f7f2e238543d4"), "id" : 14, "username" : "U" }
{ "_id" : ObjectId("5ebe5eb9825f7f2e238543d5"), "id" : 15, "username" : "U" }
{ "_id" : ObjectId("5ebe5eb9825f7f2e238543d8"), "id" : 18, "username" : "U" }
{ "_id" : ObjectId("5ebe5eb9825f7f2e238543d9"), "id" : 19, "username" : "U" }
{ "_id" : ObjectId("5ebe5eb9825f7f2e238543c9"), "id" : 3, "username" : "U" }
{ "_id" : ObjectId("5ebe5eb9825f7f2e238543cc"), "id" : 6, "username" : "U" }
{ "_id" : ObjectId("5ebe5eb9825f7f2e238543ce"), "id" : 8, "username" : "U" }
{ "_id" : ObjectId("5ebe5eb9825f7f2e238543d1"), "id" : 11, "username" : "U" }
{ "_id" : ObjectId("5ebe5eb9825f7f2e238543d2"), "id" : 12, "username" : "U" }
{ "_id" : ObjectId("5ebe5eb9825f7f2e238543da"), "id" : 20, "username" : "U" }
全部還原
