# Best Practice for running PMM Client for MongoDB ReplicaSet
**URL:** https://forums.percona.com/t/best-practice-for-running-pmm-client-for-mongodb-replicaset/8956
**Category:** PMM 2.x
**Created:** [January 27, 2021, 7:54am UTC](https://forums.percona.com/t/best-practice-for-running-pmm-client-for-mongodb-replicaset/8956 "2021-01-27T07:54:34Z")
**Posts on this page:** 14
**Page:** 1
### Author:  [@rajalokan](https://forums.percona.com/u/rajalokan)
#### Post date: [January 27, 2021, 7:54am UTC](https://forums.percona.com/t/best-practice-for-running-pmm-client-for-mongodb-replicaset/8956/1 "2021-01-27T07:54:34Z")
Hi Team. Thanks a lot for this awesome PMM tool. Great Work.
I am trying to monitor a mongodb replicaset. I understand steps to setup a mongo client (on Ubuntu node) is
1. Install `pmm2` repo. (`apt install`).
2. Configure PMM client to talk to PMM server (`pmm-admin config ...`
3. Create role and user in mongodb. (`db.createRole` & `db.createUser`)
4. Create a PMM service for this mongodb. (`pmm-admin add mongodb`).
**My question is reg fourth (4th) step. Do we need to do this for all the nodes of replicaset. Or should this be done only once for one replicaset ?** I understand Step 1 and Step 2 should be done for all the nodes of replicaset to ensure we get OS metrics from those node. Can anyone please clarify reg step 3 and step 4.
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### Author:  [@Vadim\_Yalovets](https://forums.percona.com/u/Vadim_Yalovets)
#### Post date: [January 27, 2021, 8:39am UTC](https://forums.percona.com/t/best-practice-for-running-pmm-client-for-mongodb-replicaset/8956/2 "2021-01-27T08:39:39Z")
Hi Alok,
If your replica set is active than user can be created on the primary node.
All services should be added for monitoring (`pmm-admin add mongodb`)
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### Author:  [@ROHIT\_KHURANA](https://forums.percona.com/u/ROHIT_KHURANA)
#### Post date: [February 1, 2021, 11:52am UTC](https://forums.percona.com/t/best-practice-for-running-pmm-client-for-mongodb-replicaset/8956/3 "2021-02-01T11:52:51Z")
Step 3 need to run on primary node only. Rest steps should execute on all nodes separately.
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### Author:  [@ROHIT\_KHURANA](https://forums.percona.com/u/ROHIT_KHURANA)
#### Post date: [February 4, 2021, 9:56am UTC](https://forums.percona.com/t/best-practice-for-running-pmm-client-for-mongodb-replicaset/8956/4 "2021-02-04T09:56:41Z")
Yes, step 4, you need to run on each node of replica set
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### Author:  [@venkatsv.2020](https://forums.percona.com/u/venkatsv.2020)
#### Post date: [February 25, 2021, 7:51am UTC](https://forums.percona.com/t/best-practice-for-running-pmm-client-for-mongodb-replicaset/8956/5 "2021-02-25T07:51:48Z")
what is the syntax to add replica nodes for monitoring.
i am able to add cluster and but cannot able to add nodes.
pmm-admin list
Service type Service name Address and port Service ID
MongoDB xxxxxxx 127.0.0.1:27017 xxxxxxxxxxxx
Step1: add cluster → pmm-admin add mongodb --username=pmm --password=xxxx --cluster mongodev0 mongodev
on node1:
Step2: add replica cluster → pmm-admin add mongodb:metrics --uri “mongodb://xxxxxx:27017/admin?replicaSet=mongodev0” mongonode1 --cluster mongodev0 mongodev
Error at step2 : pmm-admin: error: expected command but got “mongodb:metrics”, try --help
Please advise
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### Author:  [@ROHIT\_KHURANA](https://forums.percona.com/u/ROHIT_KHURANA)
#### Post date: [February 25, 2021, 8:22am UTC](https://forums.percona.com/t/best-practice-for-running-pmm-client-for-mongodb-replicaset/8956/6 "2021-02-25T08:22:34Z")
Can you share out put of
> pmm-admin list.
it’s pmm-admin add **mongodb** not **mongodb:metrics**
if you have replica set, you need to add mongo as a cluster so that you will find all node under one cluster on dashboard.
> pmm-admin add mongodb --username=pmm --password=xxxx --cluster clustername
if you have standalone node. Then you need to add mongo node.
> pmm-admin add mongodb --username=pmm --password=pmm
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### Author:  [@venkatsv.2020](https://forums.percona.com/u/venkatsv.2020)
#### Post date: [February 25, 2021, 8:29am UTC](https://forums.percona.com/t/best-practice-for-running-pmm-client-for-mongodb-replicaset/8956/7 "2021-02-25T08:29:45Z")
Thank you Rohit.
pmm-admin list
Service type Service name Address and port Service ID
MongoDB xxxdb 127.0.0.1:27017 /service\_id/xxxxxx
Agent type Status Metrics Mode Agent ID Service ID
pmm\_agent Connected /agent\_id/xxxx
node\_exporter Running push /agent\_id/xxx
mongodb\_exporter Running push /agent\_id/xxxx /service\_id/xxxxx
mongodb\_profiler\_agent Running /agent\_id/xxx /service\_id/xxxxx
vmagent Running push /agent\_id/xxxx
1. i have a replicaset with three nodes, i am able to see cluster in dash board
2. but i do not see other node information ( secondary)
pmm-admin add mongodb --username=pmm --password=xxxx --cluster clustername → this is added
how do i configure all nodes/replicaset ( to monitor replication latency etc…)
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### Author:  [@ROHIT\_KHURANA](https://forums.percona.com/u/ROHIT_KHURANA)
#### Post date: [February 25, 2021, 9:28am UTC](https://forums.percona.com/t/best-practice-for-running-pmm-client-for-mongodb-replicaset/8956/8 "2021-02-25T09:28:33Z")
run below on each node
> pmm-admin add mongodb --username=pmm --password=xxxx --cluster clustername
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### Author:  [@Vadim\_Yalovets](https://forums.percona.com/u/Vadim_Yalovets)
#### Post date: [February 25, 2021, 9:34am UTC](https://forums.percona.com/t/best-practice-for-running-pmm-client-for-mongodb-replicaset/8956/9 "2021-02-25T09:34:30Z")
> [@venkatsv.2020](#):
>
> i have a replicaset with three nodes, i am able to see cluster in dash board
Could you check labels _set_ and _replication\_set_ on Explore page?
You may use the next command
`count by (set, replication_set) (mongodb_mongod_replset_my_state)`
e.g.
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### Author:  [@venkatsv.2020](https://forums.percona.com/u/venkatsv.2020)
#### Post date: [February 25, 2021, 12:35pm UTC](https://forums.percona.com/t/best-practice-for-running-pmm-client-for-mongodb-replicaset/8956/10 "2021-02-25T12:35:11Z")
i have executed below commands on clients to add cluster/nodes
Primary:
pmm-admin add mongodb --username=pmm --password=xxxx --cluster clustername
pmm-admin add mongodb --username=pmm --password=xxxxx node1
Secondary1
pmm-admin add mongodb --username=pmm --password=xxxxx node2
Secondary2 :
pmm-admin add mongodb --username=pmm --password=xxxx node3
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### Author:  [@venkatsv.2020](https://forums.percona.com/u/venkatsv.2020)
#### Post date: [February 25, 2021, 12:47pm UTC](https://forums.percona.com/t/best-practice-for-running-pmm-client-for-mongodb-replicaset/8956/11 "2021-02-25T12:47:04Z")
i cannot run the same command on all three nodes, only one node is possible , as above command register cluster
error : Service with name “xxxxx” already exists.
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### Author:  [@Vadim\_Yalovets](https://forums.percona.com/u/Vadim_Yalovets)
#### Post date: [February 25, 2021, 1:39pm UTC](https://forums.percona.com/t/best-practice-for-running-pmm-client-for-mongodb-replicaset/8956/12 "2021-02-25T13:39:38Z")
There is a no reason to add service twice on node1. It’s already monitored after the first command.
Also please use flag _–cluster clustername_ for all nodes.
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### Author:  [@venkatsv.2020](https://forums.percona.com/u/venkatsv.2020)
#### Post date: [February 25, 2021, 2:15pm UTC](https://forums.percona.com/t/best-practice-for-running-pmm-client-for-mongodb-replicaset/8956/13 "2021-02-25T14:15:40Z")
Thank you Adivinho.
i tried your suggestion , my problem still the same
1. i do not see replset members ( please refer picture)
2.just want to know why is the state null
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### Author:  [@ROHIT\_KHURANA](https://forums.percona.com/u/ROHIT_KHURANA)
#### Post date: [February 26, 2021, 10:15am UTC](https://forums.percona.com/t/best-practice-for-running-pmm-client-for-mongodb-replicaset/8956/14 "2021-02-26T10:15:45Z")
Below worked for me
primary
> pmm-admin add mongodb --username=pmm --password=xxxxx node1 --cluster clustername
Secondary1
> pmm-admin add mongodb --username=pmm --password=xxxxx node2 --cluster clustername
Secondary2 :
> pmm-admin add mongodb --username=pmm --password=xxxx node3 --cluster clustername
