Sharded mongodb cluster use only one shard - mongodb

Question

I'm trying to create a sharded mongodb cluster, I have 3 VM to use and I was trying to get the following setup:
VM1) Node.js Application + mongos instance
VM2) CSRS PRIMARY + Shard
VM3) CSRS SECONDARY + Shard
I'm not interested in replication but I need sharding because I will have to query over large number of results.
To achieve what stated above I have done the following:
On both VM2 and VM3
mongod –configsvr --replSet configM4C –bind_ip <ipVM2/3> --port 27040
mongod –shardsvr --replSet shardM4C --bind_ip <ipVM2/3> --port 27041
Then, connected to the configM4C on VM2(mongo --host --port 27040) and run
rs.initiate({
_id:”configM4C”,
configsvr: true,
members: [
{_id: 0, host: “<ipVM2>:27040”},
{_id:1, host: “<ipVM3>:27040”}
]
})
Then, connected to shardM4C on VM2(mongo --host --port 27041) and run
rs.initiate({
_id: shardM4C,
members: [
{_id: 0, host: “<ip1>:27041”},
{_id:1, host: “<ip2>:27041”}
]
})
Started mongos on VM1
mongos –configdb configM4C/<ipVM2>:27040,<ipVM3>:27040 --port 27042
Connected to mongos on VM1(mongo --port 27042):
sh.addShard("<ipVM2>:27041)
sh.addShard("<ipVM3>:27041)
sh.enableSharding("pings")
sh.shardCollection("pings.pings", {provider:1, from_zone: 1, to_zone: 1})
Anyway at this point if I run db.pings.getShardDistribution() I get:
Shard shardM4C at shardM4C/<ipVM3>:27041,<ipVM2>:27041
data : 19.47MiB docs : 102876 chunks : 1
estimated data per chunk : 19.47MiB
estimated docs per chunk : 102876
Totals
data : 19.47MiB docs : 102876 chunks : 1
Shard shardM4C contains 100% data, 100% docs in cluster, avg obj size on shard : 198B
sh.status():
sharding version: {
"_id" : 1,
"minCompatibleVersion" : 5,
"currentVersion" : 6,
"clusterId" : ObjectId("5b58a6b4986cc2d94694a3f9")
}
shards:
{ "_id" : "shardM4C", "host" : "shardM4C/10.0.0.4:27041,10.0.0.7:27041", "state" : 1 }
active mongoses:
"3.6.3" : 1
autosplit:
Currently enabled: yes
balancer:
Currently enabled: yes
Currently running: no
Failed balancer rounds in last 5 attempts: 5
Last reported error: Could not find host matching read preference { mode: "primary" } for set shardM4C
Time of Reported error: Wed Jul 25 2018 21:44:24 GMT+0000 (UTC)
Migration Results for the last 24 hours:
No recent migrations
databases:
{ "_id" : "config", "primary" : "config", "partitioned" : true }
config.system.sessions
shard key: { "_id" : 1 }
unique: false
balancing: true
chunks:
shardM4C 1
{ "_id" : { "$minKey" : 1 } } -->> { "_id" : { "$maxKey" : 1 } } on : shardM4C Timestamp(1, 0)
{ "_id" : "pings", "primary" : "shardM4C", "partitioned" : true }
pings.pings
shard key: { "provider" : 1 }
unique: false
balancing: true
chunks:
shardM4C 1
{ "provider" : { "$minKey" : 1 } } -->> { "provider" : { "$maxKey" : 1 } } on : shardM4C Timestamp(1, 0)
{ "_id" : "test", "primary" : "shardM4C", "partitioned" : false }
And if I run a query in the executionStats I get:
...
"queryPlanner" : {
"mongosPlannerVersion" : 1,
"winningPlan" : {
"stage" : "SINGLE_SHARD",
"shards" : [
{
"shardName" : "shardM4C",
"connectionString" : "shardM4C/<ipVM3>:27041,<ipVM2>:27041",
"serverInfo" : {
"host" : "dpiscaglia-2",
"port" : 27041,
"version" : "3.6.3",
"gitVersion" : "9586e557d54ef70f9ca4b43c26892cd55257e1a5"
},
...
Both results makes me think that the query is actually working on only one shard, and the second is used only for replication and as a backup(which is not what i want), am i correct?
If yes could you please help me understand what I did wrong?
Thank you very much in advance for your help
Have a good day