DEV Community: Muhammed Ahmed

One tap navigation anywhere - iOS Google Maps Shortcut

Muhammed Ahmed — Tue, 02 Aug 2022 13:22:00 +0000

I've recently started using Shortcuts and I'm finding the concept so powerful.
I've created shortcuts that let me tap an icon on my home screen and Google Maps pops up with driving directions to that location
You can download the shortcut here and customise it for your own use
I've done a full writeup on how it works here

🕵🏽 Debug VS Code Keyboard Shortcuts

Muhammed Ahmed — Fri, 08 Apr 2022 14:20:44 +0000

Sharing an article I originally wrote here

Problem

Whilst using VS Code my Cmd + N keyboard shortcut stopped creating a new file
I was stumped on how to figure out what was causing the issue

Solution

Looking around on Stack Overflow people suggested looking at the Keybindings as installed plugins can cause keyboard shortcut conflicts
In VS Code go to Preferences > Keyboard Shortcuts
Whilst poking around here I discovered a handy little feature of VS Code where you can type a keyboard shortcut and find out what it's mapped to.
You just have to click the little keyboard icon (1)
I typed in Cmd + N and lo and behold it popped up with two entries and I found the source of the conflict and deleted the conflicting one

👋 Hope it helps someone figure out their issues. If you'd like to keep up with technical blog posts on a variety of topics please feel free to join me on upsync.dev 😎

Running a Mongo Replicaset Locally using Docker and Docker Compose

Muhammed Ahmed — Wed, 30 Mar 2022 22:00:23 +0000

TLDR

You can use Docker and Docker Compose to start a Mongo replica set locally
GitHub repo: docker-compose-mongo-replica-set
Use docker-compose up -d and off you go

Docker Compose File

version: "3.8"

services:
  mongo1:
    image: mongo:4.2
    container_name: mongo1
    command: ["--replSet", "my-replica-set", "--bind_ip_all", "--port", "30001"]
    volumes:
      - ./data/mongo-1:/data/db
    ports:
      - 30001:30001
    healthcheck:
      test: test $$(echo "rs.initiate({_id:'my-replica-set',members:[{_id:0,host:\"mongo1:30001\"},{_id:1,host:\"mongo2:30002\"},{_id:2,host:\"mongo3:30003\"}]}).ok || rs.status().ok" | mongo --port 30001 --quiet) -eq 1
      interval: 10s
      start_period: 30s

  mongo2:
    image: mongo:4.2
    container_name: mongo2
    command: ["--replSet", "my-replica-set", "--bind_ip_all", "--port", "30002"]
    volumes:
      - ./data/mongo-2:/data/db
    ports:
      - 30002:30002

  mongo3:
    image: mongo:4.2
    container_name: mongo3
    command: ["--replSet", "my-replica-set", "--bind_ip_all", "--port", "30003"]
    volumes:
      - ./data/mongo-3:/data/db
    ports:
      - 30003:30003

What is it?

A way to run 3 instances of Mongo in a replica set on your machine
This docker-compose setup starts a local mongo replica set with 3 instances running on:
- mongo1:30001
- mongo2:30002
- mongo3:30003

Are there any prerequisites?

• Docker
• Docker Compose
• The following in your /etc/hosts file:

127.0.0.1       mongo1
127.0.0.1       mongo2
127.0.0.1       mongo3

How do I run the Replica Set?

Simples:

docker-compose up -d

How do I access the Mongo Shells for each Instance?

docker exec -it mongo1 sh -c "mongo --port 30001"
docker exec -it mongo2 sh -c "mongo --port 30002"
docker exec -it mongo3 sh -c "mongo --port 30003"

How does it work?

Starts three instances of Mongo
On the first instance it runs the following Mongo Shell command:

rs.initiate(
  {
    s_id : 'my-replica-set',
    members: [
      { _id : 0, host : "mongo1:30001" },
      { _id : 1, host : "mongo2:30002" },
      { _id : 2, host : "mongo3:30003" }
    ]
  }
)

This causes all 3 instances to join the replica set named my-replica-set and start talking to each other
One is elected to become the PRIMARY and the other two become SECONDARY instances
The Docker healthcheck config is used to cause the initialisation of the replica set. More info in the further reading links.

Robo 3T

I used Robo 3T to test it locally and used the following config for the connection:

Acknowledgements / Further Reading

Cross posted from my blog here