Setup MongoDB replica set on local host with only a single primary - For Apple Silicon

gistfile1.txt

Add the `replication` section to the mongod.conf file:

```
$cat /opt/homebrew/etc/mongod.conf
systemLog:
  destination: file
  path: /opt/homebrew/var/log/mongodb/mongo.log
  logAppend: true
storage:
  dbPath: /opt/homebrew/var/mongodb
net:
  bindIp: 127.0.0.1, ::1
  ipv6: true
replication:
  replSetName: replocal
```

Restart mongod using brew(change @__ according to your version):

```sh
$ brew services restart [email protected]
```

Connect with local mongo shell and initiate the replica set:

```
$mongo


> rs.initiate({_id: "replocal", members: [{_id: 0, host: "127.0.0.1:27017"}] })
{ "ok" : 1 }
```

Now you'll be secondary, but then it will promote you to primary since you're the only one:

```
replocal:SECONDARY> rs.status
function () {
    return db._adminCommand("replSetGetStatus");
}

replocal:PRIMARY> rs.status()


```

You can tail the oplog at

```
replocal:PRIMARY> use local
switched to db local
replocal:PRIMARY> db.getCollection('oplog.rs').find()
```

...lots of output here

This is an updated version of this gist from Davisford. It is specifically for Apple Silicon architecture.