Add Dump A Remote Database as a mongo til

README.md

@@ -9,7 +9,7 @@ and pairing with smart people at Hashrocket.
 
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@@ -392,6 +392,7 @@ _925 TILs and counting..._
 ### MongoDB
 
 - [Determine The Database Version](mongodb/determine-the-database-version.md)
+- [Dump A Remote Database](mongodb/dump-a-remote-database.md)
 - [Get Size Stats For A Collection](mongodb/get-size-stats-for-a-collection.md)
 - [List Size Stats For All Collections](mongodb/list-size-stats-for-all-collections.md)
 

mongodb/dump-a-remote-database.md

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+# Dump A Remote Database
+
+Here is a single-line script for dumping a remote mongo database. This will
+dump it to your local filesystem in a binary format (`.bson`) that you can then
+restore to another mongo instance.
+
+Create a file like this called `mongdump-cmd` and replace the various
+placeholder values (e.g. `<HOST>`) with valid values for your remote mongo
+instance.
+
+```bash
+mongodump --host '<HOST>:<PORT>' \
+          --ssl \
+          --username '<USER>' \
+          --password '<PASSWORD>' \
+          --authenticationDatabase 'admin' \
+          --out ./mongo-backups/<DATE>-dump
+```
+
+Create the backup directory:
+
+```bash
+$ mkdir mongo-backups
+```
+
+Then execute the bash script:
+
+```bash
+$ bash mongodump-cmd
+```
+
+This will dump everything on the remote instance into the
+`mongo-backups/2020-06-20-dump/` directory. You can also include the `--db`
+flag to dump a specific database.
+
+This can later be used with `mongoresetore` to restore the data to the mongo
+instance you specify.