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My objective is connect two different containers to get data, in other words:

• I have an instance of OpenCTI working in my docker , and I can access it through my browser (http://localhost:8080).
• Consequently, I am developing another one to get data from OpenCTI.

To connect both, I already created a docker network called "minharede".

However is not working.

The configuration of my containers is:

Docker-compose file of OpenCTI:

I was following this tutorial: https://www.youtube.com/watch?v=IiZZAu2Qtp0&ab_channel=LiliumCode

and the only changes I made were that I was using maven with eclipse instead. The rest of the code is exactly the same. When I run the app I get:

I have two separate projects in two separate folders. when I run one of them, the second one cannot run because of conflict between ports.

The problem is for ElasticSearch image. Followings are two docker-compose files:

Going through the Elasticsearch docs for setting up Elasticsearch/Kibana with Docker, but I'm getting several errors. I follow the steps exactly. I'm running this on an Ubuntu 20.04 EC2 instance. What am I doing wrong?

Here's what I did:

1. docker pull docker.elastic.co/elasticsearch/elasticsearch:8.0.0
2. docker pull docker.elastic.co/kibana/kibana:8.0.0
3. docker network create elastic
4. docker run --name es01 --net elastic -p 9200:9200 -it docker.elastic.co/elasticsearch/elasticsearch:8.0.0

After step 4, Elasticsearch says:

A password is generated for the elastic user and output to the terminal, plus enrollment tokens for enrolling Kibana and adding additional nodes to your cluster.

I get neither. Instead, I get these error logs:

I was referring to example given in the elasticsearch documentation for starting elastic stack (elastic and kibana) on docker using docker compose. It gives example of docker compose version 2.2 file. So, I tried to convert it to docker compose version 3.8 file. Also, it creates three elastic nodes and has security enabled. I want to keep it minimal to start with. So I tried to turn off security and also reduce the number of elastic nodes to 2. This is how my current compose file looks like:

I recieved a project and I need to make some changes to the code, the guy who was working on it was using Docker (a tool that I never used..), so now I am trying to "emulate" it but here it what happens :

Inside the root of the project I run the command : docker-compose up

Then, in Docker Desktop, under the container, I see every process running (beside webpacker_1), then I click on app, then "Open in browser" and then I have this error from Chrome :

I'm trying to setup logstash in docker. I'm using the logstash:8.0.0 image.

This is my logstash.yml

I want to simulate laravel logging to EFK system server
Base on this, I build up two container. One of laravel project's container. The ohter is EFK system container

but EFK's fluentd does not catch any data or event

my container's compose:

i am trying to connect ElasticSearch with my .NET Core project. I can send request and create data if i run my project manually. But if i try with the docker build it throws 500 error. I cant create data. It doesnt create elasticSearch index too. When i manually create index and send request, it doesnt create data either.

Dockerfile