I wanted to connect to some external site via my server in AWS because the site has IP address filters as security. However my apartment doesn't have a static IP address so I came up with an idea connecting to the site via SSH tunnel and if it runs as a container in docker-compose, it’s very easy to execute by the …

Busybox image is very useful to execute a simple binary on Docker because the image size is quite small. However there's no commands like apt-get or yum to install additional packages. So, if it's necessary to do that, using Alpine Linux image is the best choice instead of Busybox image . Let me share why is it and …

I saw this news about the serious vulnerability in composer which is PHP package management software. https://www.bankinfosecurity.com/php-composer-flaw-that-could-affect-millions-sites-patched-a-16523 So, I wanted to update composer in my Dockerfile but I realized that I already specified the version as follows. 1curl …

I created a small Python program to get data via the App Store Connect API for report automation with the appstoreconnect library. After update recently, I got the following error. 1Traceback (most recent call last): 2 File "/app/./main.py", line 88, in <module> 3 APP_STORECONNECT_API.execute() 4 File …

This is an example of how to run the Selenium with Python on Docker with the latest FireFox and its geckodriver. The official Python docker image is based on Debian 10 (Buster) 1$ docker run -i --rm python:3.9 cat /etc/os-release | grep VERSION= 2VERSION="10 (buster)" In this image, the installable FireFox …

Getting "503 service unavailable" error after executing "docker pull" command is a very rare situation but there was in the past. So, it’s worth knowing for using docker. Most of the time, this is Docker Hub’ server side problem not client one. Once the error happens, we should visit their web site …

It's a popular problem getting "403 Forbidden" errors from Apache. Even though it's working on the docker, it's the same but a little bit harder to investigate why it’s happened. However, most of the time, the cause of this problem is simple. Let’s take a look at some samples. First, let me show you the …

Many docker images execute its main process as root but it’s not good for security reasons and it depends on Kubernetes cluster, Pod Security Policies is applied to avoid running containers as root. So, let’s take a look at how to run Apache Web Server as a non-root user. Before trying, here is running the origin image …

One day, I realized that one of my CodePipeline was failed to build the docker image. I investigated what caused the error. And then, I found out the following error message when executing docker build command. 1ERROR: failed to copy: httpReaderSeeker: failed open: unexpected status code …

There are a lot of samples of Kubernetes and Docker Compose which define public images like nginx:alpine, golang php-fpm and so on. However even though it’s easy to use, it’s not good for production environments because there's a possibility that they are not up-to-date. For example, I’m trying with one of the famous …