wait-for | Python script that runs a command every N seconds | Command Line Interface library

I make this code for learning:-

I have a NodeJS Express App that depends on MongoDB change streams. For them to be available, MongoDB has to be configured to run as a replica set (even if there is only one node in that set).

I'm working on Windows 10 pro.

I'm trying to dockerize this App, basing the MongoDB container off the official mongo:5 image.

For this to work, I want an automated way of initializing the DB as a replica set. Tutorials I've found rely on either execing into the container and running rs.initiate() from mongosh (or similar approaches), which is manual work I want to avoid. Or they use hacks like wait-for-it.sh as here.

I feel there must be a better solution, based somehow on the paragraph "Initializing a fresh instance", from the docs.

It describes that

When a container is started for the first time it will execute files with extensions .sh and .js that are found in /docker-entrypoint-initdb.d.

When exactly in the container lifecycle does that happen? After the container is initialized? Or after the DB is ready? Because this seems to be the perfect place for this initialization logic, which runs flawlessly when executed manually, from within the container.

However, placing

Continuing the discussion from DDP: how do I wait for a connection?:

Based on the thread above, we an leverage Tracker.autorun to wait and confirm for a successful connection between a client and meteor server.

I would like to do the same on a server : server connection

Basically, I have a meteor server (server1), that will need to “test” and see if another meteor server (server2) is available.

Each time I run DDP.connect(remoteUrl).status() within server1’s meteor method, it always says “connection”. I know it connects in the next second or two, but I’m unable to wait for checking the connection success flag.

How do i do this on the server?

Thanks

I am working on a GitHub Actions Pipeline for the deployment of different images for a different environment, but I have been getting a "bad indentation of a mapping entry at line 72, column 5:" for this YAML, where I am trying to set prod variables, I have tried every which way but I am not sure what might be wrong here, please help me out.

I have an Airflow application running on Kubernetes that is using Vault as a secret backend. Recently I manage to move my config value sql_alchemy_conn to the Vault as it contains password for the user. I can see that it is fetching the value from secret backend and able to connect to database and run migration job.

But since then I cannot deploy the rest of the application because all other resources are stuck in the init container wait-for-airflow-migrations. I am using the official helm chart to deploy the application and this is the python code that it uses to check if the migrations are run

In bash scripts, I have seen codes like this

I am working with GitHub to deploy a container based application on multiple environments, I have two environments,

1. Dev
2. Prod

I am building the application on both the Environments, this is my yml file:

I am getting this message nc command is missing and by doing some R&D, I got to know that in order to resolve this, (I think) I need to run below command in MySQL container in docker-compose

I'm trying to have google datastore emulator run as part of the CI. I've added a services section to .gitlab-ci.yml but there's an error.

Here's the full configuration YAML: