configsvr:true

[Maxim Neverov]

Hi,

I'm trying to deploy mongo sharding cluster following this instruction. 

When I run mongod --config configuration_file_path I get the the error message in log:

"Locally stored replica set configuration is invalid; See http://www.mongodb.org/dochub/core/recover-replica-set-from-invalid-config for information on how to recover from this. Got "BadValue: Nodes started with the --configsvr flag must have configsvr:true in their config" while validating".

My configuration file is:

sharding:

    clusterRole: "configsvr"

replication:

    replSetName: "rs0"

net:

    port: 27017    

storage:

    dbPath: "db_path"

systemLog:

    destination: "file"

    path: "log_path"

I already tried to add configsvr: true to sharding and got "Unrecognized option: sharding.configsvr". I've also tried to set this option with 

setParameter:

    configsvr: "true"

with the same result.

mongod --version

db version v3.2.4

git version: e2ee9ffcf9f5a94fad76802e28cc978718bb7a30

allocator: tcmalloc

modules: none

build environment:

    distarch: x86_64

    target_arch: x86_64

How can I set this option?

[Kevin Adistambha]

Hi

It’s been a while since you posted this issue. Have you had success in resolving this?

To deploy config servers as a replica set, you need two basic things:

1. The mongod instance must be called with the --replSet and --configsvr options. The --configsvr option can also be set in the sharding.clusterRole: configsvr if using a config file.
2. The replica set configuration (i.e. the document you passed into rs.initiate()) must contain the field configsvr: true

The main issue in your deployment is this line you posted:

Got “BadValue: Nodes started with the —configsvr flag must have configsvr:true in their config” while validating”.

This error appears when you initiate a regular replica set (i.e. without the --configsvr option and without the configsvr: true during rs.initiate()) and then attempt to restart it using the --configsvr option. That is, you cannot repurpose an existing replica set into config servers.

To use replica set config servers, you must create a new replica set, or upgrade an existing config server deployment. This is because there are additional restrictions that replica set config servers must abide compared to a regular replica set.

For more information, please see:

• Replica Set Config Servers
• Upgrade Config Servers to Replica Set (without downtime)
• Upgrade Config Servers to Replica Set (with downtime)

Best regards,
Kevin

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