I'm setting up a sharded mongo cluster. I have two replica sets consisting of two nodes each, a replica set of three config servers, and a single mongos instance.
I have been able to add the replica set to the mongos instance:
sh.addShard("rs1/shard-rs01-s01");
This returns {"ok" : 1} and the same is true of the second replica set.
However when I try to do any database operations such as db.test.insert(...) I receive this error:
2017-02-23T01:17:28.599+0000 I ASIO [CatalogManagerReplacer]
Connecting to shard-RS01-S01:27017
2017-02-23T01:17:28.600+0000 I ASIO [CatalogManagerReplacer]
Connecting to config-01:27019
2017-02-23T01:17:28.603+0000 I ASIO [CatalogManagerReplacer]
Successfully connected to config-01:27019
2017-02-23T01:17:48.600+0000 I ASIO [CatalogManagerReplacer] Failed to connect to shard-RS01-S01:27017 - ExceededTimeLimit: Operation timed out
I double checked that the firewall wasn't blocking the connection by disabling it on all of the systems. For what it is worth, on the node that contains the mongos instance I can connect to the replica-set directly through the command like using this command regardless of the firewall state:
mongo --host rs1/shard-rs01-s01:27017
So I am fairly sure it is not a firewall issue. Anyone have any ideas?
Here's a shard map of the setup if it is useful for anyone able to help...
mongos> db.runCommand("getShardMap")
{
"map" : {
"config" : "rs0/config-01:27019,config-02:27019,config-03:27019",
"config-01:27019" : "rs0/config-01:27019,config-02:27019,config-03:27019",
"config-02:27019" : "rs0/config-01:27019,config-02:27019,config-03:27019",
"config-03:27019" : "rs0/config-01:27019,config-02:27019,config-03:27019",
"rs0/config-01:27019,config-02:27019,config-03:27019" : "rs0/config-01:27019,config-02:27019,config-03:27019",
"rs1" : "rs1/shard-RS01-S01:27017,shard-RS01-S02:27017",
"rs1/shard-RS01-S01:27017,shard-RS01-S02:27017" : "rs1/shard-RS01-S01:27017,shard-RS01-S02:27017",
"rs2" : "rs2/shard-RS02-S03:27017,shard-RS02-S04:27017",
"rs2/shard-RS02-S03:27017,shard-RS02-S04:27017" : "rs2/shard-RS02-S03:27017,shard-RS02-S04:27017",
"shard-RS01-S01:27017" : "rs1/shard-RS01-S01:27017,shard-RS01-S02:27017",
"shard-RS01-S02:27017" : "rs1/shard-RS01-S01:27017,shard-RS01-S02:27017",
"shard-RS02-S03:27017" : "rs2/shard-RS02-S03:27017,shard-RS02-S04:27017",
"shard-RS02-S04:27017" : "rs2/shard-RS02-S03:27017,shard-RS02-S04:27017"
},
"ok" : 1
}
you need to initialize your mongos.
rs.initiate( { _id: "configReplSet", configsvr: true, members: [ { _id: 0, host: "mongo-config-1:27017" }] } )
Related
We have 4 mongoDB servers of which the first one is currently the primary with 3 replicas. If I specify all 4 servers in the connection string it fails to connect at all, but if I just specify the first one it connects fine. This is bad because if the first server fails, it will not be able to connect.
This works:
mongodb://login:password#server1:27017/admin?readPreference=Primary
This does NOT work:
mongodb://login:password#server1:27017,server2:27017,server3:27017,server4:27017/admin?readPreference=Primary
Exception:
A timeout occured after 30000ms selecting a server using CompositeServerSelector{ Selectors = WritableServerSelector, LatencyLimitingServerSelector{ AllowedLatencyRange = 00:00:00.0150000 } }. Client view of cluster state is { ClusterId : "1", ConnectionMode : "Automatic", Type : "ReplicaSet", State : "Connected", Servers : [{ ServerId: "{ ClusterId : 1, EndPoint : "Unspecified/server1:27017" }", EndPoint: "Unspecified/server1:27017", State: "Disconnected", Type: "Unknown", HeartbeatException: "MongoDB.Driver.MongoConnectionException: An exception occurred while opening a connection to the server.
The service trying to connect runs on Kube.
Any idea why this would be?
you need to add the mode to the connection string: replicaSet=myRepl
I'm having extreme frustration trying to setup a MongoDB replica set from scratch.
I have 2 machine run debian os and installed mongodb. When i try use rs.add() to add member to replica set then i appear error although i still connect to mongodb by
mongo --host 13.212.31.212:27017
Here is the error messages
rs0:PRIMARY> rs.add("13.212.31.212:27017")
{
"operationTime" : Timestamp(1597144435, 1),
"ok" : 0,
"errmsg" : "Quorum check failed because not enough voting nodes responded; required 2 but only the following 1 voting nodes responded: 192.168.0.59:27017; the following nodes did not respond affirmatively: 13.212.31.212:27017 failed with Received heartbeat from member with the same member ID as ourself: 0",
"code" : 74,
"codeName" : "NodeNotFound",
"$clusterTime" : {
"clusterTime" : Timestamp(1597144440, 1),
"signature" : {
"hash" : BinData(0,"AAAAAAAAAAAAAAAAAAAAAAAAAAA="),
"keyId" : NumberLong(0)
}
}
}
Here is the mongod conf
# Where and how to store data.
storage:
dbPath: /var/lib/mongodb
journal:
enabled: true
# engine:
# mmapv1:
# wiredTiger:
# where to write logging data.
systemLog:
destination: file
logAppend: true
path: /var/log/mongodb/mongod.log
# network interfaces
net:
port: 27017
bindIp: 127.0.0.1,172.26.2.229
# how the process runs
processManagement:
timeZoneInfo: /usr/share/zoneinfo
what i am doing wrong ?
This is the descriptive error message:
the following 1 voting nodes responded: 192.168.0.59:27017; the following nodes did not respond affirmatively: 13.212.31.212:27017 failed with Received heartbeat from member with the same member ID as ourself: 0"
That is telling you that 192.168.0.59:27017 and 13.212.31.212:27017 are the same node, and you can't add the same node twice.
I have created one dataset in azure datafactory for connect mongodb.
While configuration i have added MongoDb connection string and it's show me connection successful. As per shown in image view
After that i have configure whole pipeline with proper configuration.
Now i am facing issue while run that pipeline.
I am getting below error as Mongodb connection is not valid.
Operation on target Copydataset1 failed: Failure happened on 'Source' side. ErrorCode=UserErrorMongoDbConnectionTimeout,'Type=Microsoft.DataTransfer.Common.Shared.HybridDeliveryException,Message=Connection to MongoDB server is timeout. This is usually caused by invalid connection string.,Source=Microsoft.DataTransfer.Runtime.MongoDbV2Connector,''Type=System.TimeoutException,Message=A timeout occured after 30000ms selecting a server using CompositeServerSelector{ Selectors = ReadPreferenceServerSelector{ ReadPreference = { Mode : Primary } }, LatencyLimitingServerSelector{ AllowedLatencyRange = 00:00:00.0150000 } }. Client view of cluster state is { ClusterId : "1", ConnectionMode : "Automatic", Type : "Unknown", State : "Disconnected", Servers : [{ ServerId: "{ ClusterId : 1, EndPoint : "192.0.0.1:27017" }", EndPoint: "192.0.0.1:27017", State: "Disconnected", Type: "Unknown" }] }.,Source=MongoDB.Driver.Core,'
NOTE: This ip 192.0.0.1:27017 is only for example.
I'm not a Go guy, just need to use a plugin written in Go and I'm having some trouble between plugin and MongoDB.
The error is:
server selection error: server selection timeout
current topology: Type: Unknown
Servers:
Addr: localhost:27017, Type: Unknown, State: Connected, Avergage RTT: 0, Last error: dial tcp 127.0.0.1:27017: connect: connection refused
exit status 1
My configuration:
time=“2019-09-03T16:29:35Z” level=debug msg=“Host: ip-XXX-XX-XX-XXX.sa-east-1.compute.internal”
time=“2019-09-03T16:29:35Z” level=debug msg=“Port: 27017”
time=“2019-09-03T16:29:35Z” level=debug msg=“Username: user”
time=“2019-09-03T16:29:35Z” level=debug msg=“Password: user123*”
time=“2019-09-03T16:29:35Z” level=debug msg=“DBName: dbBackend”
The plugin snippet that performs the connection:
addr := fmt.Sprintf("mongodb://%s:%s", m.Host, m.Port)
to := 60 * time.Second
opts := options.ClientOptions{
ConnectTimeout: &to,
}
opts.ApplyURI(addr)
if m.Username != "" && m.Password != "" {
opts.Auth = &options.Credential{
AuthSource: m.DBName,
Username: m.Username,
Password: m.Password,
PasswordSet: true,
}
}
client, err := mongo.Connect(context.TODO(), &opts)
if err != nil {
return m, errors.Errorf("couldn't start mongo backend. error: %s\n", err)
}
err1 := client.Ping(context.TODO(), nil)
if err1 != nil {
log.Fatal(err1) // error happens here
}
log.Debugf("MONGO CONNECTED")
m.Conn = client
return m, nil
I just can't realize why the mongo driver is looking on localhost if I'm setting the address of my mongoDB server.
EDIT 1
My db has replica set configured only to use change streams.
This is my RS configuration:
{
"_id" : "rs0",
"version" : 69559,
"protocolVersion" : 1,
"writeConcernMajorityJournalDefault" : true,
"members" : [
{
"_id" : 0,
"host" : "localhost:27017",
"arbiterOnly" : false,
"buildIndexes" : true,
"hidden" : false,
"priority" : 1,
"tags" : {
},
"slaveDelay" : 0,
"votes" : 1
}
],
"settings" : {
"chainingAllowed" : true,
"heartbeatIntervalMillis" : 2000,
"heartbeatTimeoutSecs" : 10,
"electionTimeoutMillis" : 10000,
"catchUpTimeoutMillis" : -1,
"catchUpTakeoverDelayMillis" : 30000,
"getLastErrorModes" : {
},
"getLastErrorDefaults" : {
"w" : 1,
"wtimeout" : 0
},
"replicaSetId" : ObjectId("5cf684c3c0db3f53727d1bb4")
}
}
Any help solving it appreciated.
Thanks
why the mongo driver is looking on localhost if I'm setting the address of my mongoDB server.
When mongo-go-driver's client is connecting to a MongoDB deployment, it will perform Server Discovery and Monitoring to discovers one or more servers (MongoDB being a distributed database by nature). One of the early steps is to begin monitoring the topology by invoking isMaster command on all servers. Based on the output of isMaster the client will try to contact those servers. In the case of Replica Set (your case), the client strives to connect to the primary server (from isMaster.primary).
However, the hostname address is not a Fully Qualified Domain Name (FQDN) to be resolvable from the client's machine. The client's machine trying to connect to localhost defined as the replica set primary, thus failed to make a connection. Also, this is why you're seeing a message status where current topology: Type: Unknown but State: Connected. It failed to discover the deployment topology even before able to select a server to execute the command (ping)
You can solve this by setting resolvable hostnames for the value of the members field in the replica set configuration. In addition, when possible, use a logical DNS hostname instead of an ip address, as this avoids configuration changes due to ip address changes.
You can change the replica set hostnames using rs.reconfig() i.e:
cfg = rs.conf()
cfg.members[1].host = "<RESOLVABLE HOSTNAME>:<PORT NUMBER>"
rs.reconfig(cfg)
In your case, where there's only one replica set member it's quite straight forward. However if you're in production mode and have more than one members you can follow the steps outlined in Change Hostnames in a Replica Set where there are two options:
Change Hostnames without disrupting availability
Change Hostnames at the same time (one-go)
Having said all the explanation above,
alternatively, as your replica set deployment is only one server (development mode) you can set the connection mode to direct via ClientOptions.SetDirect(). Which specifies whether the client should connect directly to a server instead of auto-discovering other servers in the cluster (although this means you have no redundancy) i.e.:
opts := options.ClientOptions{ ConnectTimeout: &timeoutVariable}
opts.SetDirect(true)
opts.ApplyURI(addr)
client, err := mongo.Connect(connect.TODO(), &opts)
I have restarted 2 shards on non standard ports, by chaning their .conf files. Now when I connect via mongo and issue a listshards I get:
mongos> db.runCommand( { listshards : 1 } );
Tue Oct 23 17:36:21 uncaught exception: error {
"$err" : "error creating initial database config information :: caused by :: socket exception [CONNECT_ERROR] for vserver-dev-2:37017",
"code" : 11002
}
(37017 is the old port).
How can I update the shard ports on the router (mongos) ?
Manual updating the ports on the mongo config server:
mongo
use config
configsvr> db.shards.update({_id: "shard0000"} , {$set: {"host" : "vserver-dev-2:37018"}})
configsvr> db.shards.find()
{ "_id" : "shard0000", "host" : "vserver-dev-2:37018" }