Identifying mongo server status from bash

Question

I am writing a bash script in our linux server about extracting a report from MongoDB. In fact, there are two more replica servers and I should extract the report if the it is master at that time for that server. If not, script will not extract anything.

Is there a way to get that information from shell? Thanks.

David Modica · Accepted Answer · 2015-06-09 14:24:48Z

5

you have to run a command to find out if it the PRIMARY or not.

i have a "js" file which contains this:

`printjson(db.isMaster().ismaster);

then in my bash script i run execute this and act accordingly:

PRIMARY=`/usr/bin/mongo ${SERVERNAME}:${PORT} --quiet     ${SCRIPTDIR}/isMaster.js`;
#
#
if [ "$PRIMARY" != "false" ]; then
# it is the PRIMARY

cheers

answered Jun 9, 2015 at 14:24

David Modica

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1 Comment

skynyrd Over a year ago

Thanks I just use it like this: mongo --quiet --eval "d=db.isMaster(); print( d['ismaster'] );"

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