I’m trying to change the priority of the members of the replica set:
cfg = rs.conf();
output:
{
"_id" : "testRs",
"version" : 37747,
"protocolVersion" : NumberLong(1),
"members" : [
{
"_id" : 1,
"host" : "mongo1:27017",
"arbiterOnly" : false,
"buildIndexes" : true,
"hidden" : false,
"priority" : 0.5,
"tags" : {
},
"slaveDelay" : NumberLong(0),
"votes" : 1
},
{
"_id" : 3,
"host" : "mongo2:27017",
"arbiterOnly" : false,
"buildIndexes" : true,
"hidden" : false,
"priority" : 0.5,
"tags" : {
},
"slaveDelay" : NumberLong(0),
"votes" : 1
},
{
"_id" : 4,
"host" : "mongo3:27017",
"arbiterOnly" : false,
"buildIndexes" : true,
"hidden" : false,
"priority" : 1,
"tags" : {
},
"slaveDelay" : NumberLong(0),
"votes" : 1
},
{
"_id" : 5,
"host" : "mongo4:27017",
"arbiterOnly" : false,
"buildIndexes" : true,
"hidden" : false,
"priority" : 1,
"tags" : {
},
"slaveDelay" : NumberLong(0),
"votes" : 1
}
],
"settings" : {
"chainingAllowed" : true,
"heartbeatIntervalMillis" : 2000,
"heartbeatTimeoutSecs" : 10,
"electionTimeoutMillis" : 10000,
"getLastErrorModes" : {
},
"getLastErrorDefaults" : {
"w" : 1,
"wtimeout" : 0
},
"replicaSetId" : ObjectId("5800db44f99ff70bdbcdfdd9")
}
}
cfg.members[5].priority = 0.5
2016-12-12T23:13:06.399+0300 E QUERY [thread1] TypeError: cfg.members[5] is undefined :
cfg.members[4].priority = 0.5
2016-12-12T23:13:17.634+0300 E QUERY [thread1] TypeError: cfg.members[4] is undefined :
but id:3 change normaly:
cfg.members[3].priority = 0.5
0.5
what am I doing wrong? And why my version of the config too big? So many times that I couldn’t change the configuration)
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Answer
You should address to elements of list members, not using _id property. So it will be cfg.members[0], cfg.members[1], etc
To filter by _id I think u need to use
cfg.members.filter()