https://gist.github.com/BlakeGardner/8548102

mongo "mongodb://admin:$(salt-call pillar.get mongodb:server:admin:password --out=newline_values_only)@localhost/?authSource=admin&ssl=false"


rs.secondaryOk();
db.getMongo().getDBNames().forEach(function(dbName) {
    if (!(["local", "admin", "system"].includes(dbName))) {
        var subject = db.getSiblingDB(dbName);
        subject.getCollectionNames().forEach(function (collectionName) {
            print('Compacting: ' +dbName + " - " + collectionName);
            subject.runCommand({ compact: collectionName, force: true });
        });
    }
});