Added information about using debug cotnainer

00-infrastructure/README.md

@@ -37,6 +37,26 @@ deb-src [signed-by=/etc/apt/keyrings/opentofu.gpg,/etc/apt/keyrings/opentofu-rep
 sudo apt install tofu
 ```
 
+## Important tasks
+
+### Reuse machine secrets
+
+```shell
+tofu state rm module.talos.talos_machine_secrets.this
+tofu import module.talos.talos_machine_secrets.this output/talos-machine-secrets.yaml
+tofu apply --refresh=false
+```
+
+### Run interactive container
+
+```shell
+kubectl run -i --tty --rm debug --image=harbor.prod.eis-mk8.de.s5b.org/internal/debug-container:latest --restart=Never -- sh
+```
+
+If the container is not automatically removed, use
+```shell
+kubectl delete pod debug
+```
 
 
 ## Literature

90-debugging/00-dev_container/Dockerfile

@@ -0,0 +1,22 @@
+FROM harbor.prod.eis-mk8.de.s5b.org/proxy-mcr.microsoft.com/devcontainers/base:trixie 
+
+ARG USERNAME=vscode
+
+# Default powerline10k theme, no plugins installed
+RUN sh -c "$(wget -O- https://github.com/deluan/zsh-in-docker/releases/download/v1.2.1/zsh-in-docker.sh)"
+
+# Install important packages
+RUN apt-get update && apt-get -y install mtr-tiny iproute2 whois tcpdump vim
+
+# Used to persist bash history as per https://code.visualstudio.com/remote/advancedcontainers/persist-bash-history
+RUN SNIPPET="export PROMPT_COMMAND='history -a' && export HISTFILE=/commandhistory/.bash_history" \
+    && mkdir /commandhistory \
+    && touch /commandhistory/.bash_history \
+    && chown -R $USERNAME /commandhistory \
+    && echo "$SNIPPET" >> "/home/$USERNAME/.bashrc"
+
+# install jless (because its not available at https://containers.dev/features at time of writing)
+# RUN NONINTERACTIVE=1 /usr/bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)" \
+#         && (echo; echo 'eval "$(/home/linuxbrew/.linuxbrew/bin/brew shellenv)"') >> /home/vscode/.profile \
+#         && eval "$(/home/linuxbrew/.linuxbrew/bin/brew shellenv)" \
+#         && brew install jless

90-debugging/00-dev_container/build.sh

@@ -0,0 +1,5 @@
+#!/usr/bin/bash
+
+docker build -t harbor.prod.eis-mk8.de.s5b.org/internal/debug-container:latest .
+
+docker push harbor.prod.eis-mk8.de.s5b.org/internal/debug-container:latest