hexdump boot-packet.bin -e'"%07.8_ad " 8/1 "%03d " " " 8/1 "%03d " " |"' -e'16/1 "%_p" "|\n"' -v |
hexdump one byte decimal display
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Author Archives: Adam Young
Extract Function Refactoring using inline functions.
The Extract Function refactoring is the starting point for much of my code clean up. Once a “Main” function gets sufficiently complicated, I pull pieces of it out into their own functions, often with an eye to making them methods of the involved classes.
While working with some rust code, I encountered an opportunity to execute this refactoring on some logging code. Here’s how I executed it.
Continue readingSwinging eighth notes via articulation
Someone asked (on Reddit) how to swing eighth notes. Here’s my response, somewhat cleaned up and expanded.
Don’t. If you try to swing them, they will be over done.
Play straight eighth notes. The “swing is done via articulation.
Podman login to a secured registry
I took the container registry I ran via podman and put it behind an Apache HTTPD instance secured with mod_ssl. Now when I try to log in to it, I get:
error authenticating creds for “nuzleaf.home.younglogic.net”: error pinging docker registry nuzleaf.home.younglogic.net: invalid status code from registry 403 (Forbidden)
Here’s my debugging notes.
Continue readingDealing with reused Serial Numbers for CAs
“An error occurred during a connection to nuzleaf.home.younglogic.net. You are attempting to import a cert with the same issuer/serial as an existing cert, but that is not the same cert.”
Many years ago I battled this problem and had different solutions. Today, I got one that worked for Firefox on Fedora 32.
Continue readingRunning git and gitweb in a container with Fedora
There are many reasons to run a web service in a container. One of the remote services I rely on most heavily is git. While git local operations are fine in a global namespace, running a shared git repository on a remote server is a web-service based use case. There are three protocols used most commonly to remotely access git: git, ssh, and https. I am going to focus on the last one here.
Continue readingEnabling Write access to git-http-backend
While I was able to read/clone a git repository self-hosted with HTTPD and git-http-backend, I found that I could not push to it. Here’s how I fixed it.
Continue readingGit Via HTTP on Fedora
While local git is fine for personal development, sometimes you want to make stuff happen on a remote machine, either to share or for backup. SSH works well for this. However, I am going to target hosting my Git repository in an OpenShift instance, and HTTPS will be a much easier protocol to support.
Continue readingRunning a Container Registry Behind Apache HTTPD
I had originally run my container registry using a self signed certificate like this:
podman run --name mirror-registry -p 4000:5000 -v /opt/registry/data:/var/lib/registry:z -v /opt/registry/auth:/auth:z -e "REGISTRY_AUTH=htpasswd" -e "REGISTRY_AUTH_HTPASSWD_REALM=Registry Realm" -e REGISTRY_AUTH_HTPASSWD_PATH=/auth/htpasswd -v /opt/registry/certs:/certs:z -e REGISTRY_HTTP_TLS_CERTIFICATE=/certs/domain.crt -e REGISTRY_HTTP_TLS_KEY=/certs/domain.key -e REGISTRY_COMPATIBILITY_SCHEMA1_ENABLED=true -d docker.io/library/registry:2 |
But now that I am using FreeIPA for my Bastion host, I want to use the IPA CA cert for signing the HTTPS request. The easiest thing to do is to run the registry in the container still, but then to front it with mod_proxy.
Continue readingSyncing and Serving Yum Repos on RHEL 8
My Lab machines do not have direct access to the internet. This mirrors how my customers tend to run their environments. Instead, I run a single bastion host that can connect to the internet, and use that to perform all operations on my lab machines.
While it is great to be able to use the Install media to add packlages to PXE booted systems, after some time, the set of packages available is older than you want. For example, I hit a bug that required an update of Network Manager. So, I want to make a local yum repo from my RHEL 8 subscription. RHEL 8 makes this fairly easy.
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