Mongodb Cheatsheet

This cheat sheet is based on the latest version of mongodb, which initial had setup and didn't encounter any problems. However that all changed when I was working remote and forgot I disabled the port no my network, rather than with the server. So I went pointing around where I didn't need to and ended up messing things up. The Best tutorial out there is of course on digital ocean for my setup on ubuntu 16.04, this articles isn't so much about getting setup. I just wanted to include it because I found myself looking back at it to see if I missed a step.

Bugs/Problems
Now comes all the messed up things I found and had to deal with.

If you issue starts with this config, (Can't connect to MongoDB with authentication enabled)
security:
  authorization: enabled
Start by looking at the user you are using, try adding using root and not the documentation's use of the userAdminAnyDatabase.

 
use admin
db.createUser(
  {
    user: "admin",
    pwd: "password",
    roles: [ { role: "root", db: "admin" } ]
  }
);
exit;
- mongodb-admin-user-not-authorized


Warning/Error (Assertion: 28595:13: Permission denied)
# storage.dbPath
sudo chown -R mongodb:mongodb /var/lib/mongodb

# systemLog.path
sudo chown -R mongodb:mongodb /var/log/mongodb
Similar issue with:
"MongoDB: exception in initAndListen: 20 Attempted to create a lock file on a read-only directory: /data/db, terminating". I added the bit for my machine to do this to the folder where my data was, /data/db. Note I'm not sure if you need to worry about this warnings I just was stuck and pick straws with what the issue was. 

The Finale
After all this I was back up and turned out to be a mix multiple things, I be sure to look out for more when I split my database up. Side note IDE's I am using because I haven't figured out which one I like more are Robo 3T, mongobooster.


Commands of Importance
  • mongo --port 27017 -u "myUserAdmin" -p "abc123" --authenticationDatabase "admin"
  • db.changeUserPassword("accountUser", "password")
  • db.getUsers()
  • For a clean install, 
    • sudo apt-get purge mongodb-org*
    • sudo apt-get autoremove
    • sudo rm -r /var/log/mongodb
    • sudo rm -r /var/lib/mongodb

Popular posts from this blog

UI-Bootstrap Collapsible Sticky Footer

    I could have done this a lot of ways and ultimately I made it work with javascript modifying the class names. I also had to create multiple class names which I didn't like to much, I might come back and improve this but for now this is was I got. Also I call bootstrap+angularjs = ui-bootstrap, not sure if that's common sense but thought I should include it somewhere in my notes. Working Example: http://plnkr.co/edit/2N9ENlbw3bSvg1W9n0ch?p=preview This little css was key to prevent any kind of animation on the collapse, which would result in a scrollbar appearing on the body. A scrollbar can appear when the content's too long but not on the sticky foot duh! .no-animate { transition-duration: 0.0125s; } Research Angular-UI Bootstrap Collapse without animation - Stack Overflow http://jsfiddle.net/paulalexandru/Z2Lu5/  - Was looking at this to see if I could reuse it but I ended but just doing my own thing. Another way which I've seen Using a sticky
Read more

Installing Windows on Acer chromebook 15 cb3-532

Much of my notes are just small problems I faced (what's new!) haha. Either way this was a really fun project to do for a friend and I got excited once I research all the information. You can find instruction videos but what helped me the most was the coolstar website. Sadly they don't have parameters in the url so I can link the machine I used in this article. -  https://coolstar.org/chromebook/windows-install.html Scared of messing with the bios? Don't be!    So you need to first remove the screw to put a legacy bios on the machine. Its easy to backup the chrome os one and with the same steps to change it. You can go back in and revert to the chrome version bios. Its that last part that had me worried and its very easy to do.  Problems getting into Developer Mode?   Follow the instructions to the letter, during the step to disable the OS verification, press Ctrl-D to boot into os. If you hear two beeps I would go back to set one. I got in a loop where it s
Read more

Aspetcore: NLog with Postgresql

This Article is base ASP.Net Core 2 and the latest version of Nlog. 1. Install NLog and the Postgresql Package Using NuGet to install the package into your ASP.NET Core project: PM > Install-Package NLog.Web.AspNetCore PM > Install-Package Npgsql 3. Register NLog Add in your Startup.cs  public void Configure ( IApplicationBuilder app, IHostingEnvironment env, ILoggerFactory loggerFactory ) { ... env.ConfigureNLog( "nlog.config" ); ... // make sure Chinese chars don't fk up Encoding.RegisterProvider(CodePagesEncodingProvider.Instance); //add NLog to ASP.NET Core loggerFactory.AddNLog(); //add NLog.Web app.AddNLogWeb(); } 4. Add to Your Controller Add a logger object to your Controller. private readonly ILogger<YourController> _logger; Modify the constructor to use it public YourController ( ILogger<YourController> logger = null ) { if ( null != logger) { _logger = logger;
Read more