jhunt

;;
;; This code was extracted from a larger project
;; and used in a Twitter thread on using macros
;; to fact-check programmers at compile-time.
;;
;; https://twitter.com/iamjameshunt/status/1470845641027129345
;;
  
(defun -flags-for (num)
  (format nil "~{~A~}"

jhunt

(defun alist? (lst)
  (cond ((null lst) t)
        ((listp lst) (and (consp (car lst))
                          (alist? (cdr lst))))
        (t nil)))

(defun json-encode-obj (v)
  (format nil "~{~a~^,~}"
          (mapcar (lambda (pair)
                    (format nil "\"~(~a~)\":~a"

jhunt

SET @OLD_UNIQUE_CHECKS=@@UNIQUE_CHECKS, UNIQUE_CHECKS=0;
SET @OLD_FOREIGN_KEY_CHECKS=@@FOREIGN_KEY_CHECKS, FOREIGN_KEY_CHECKS=0;
SET @OLD_SQL_MODE=@@SQL_MODE, SQL_MODE='TRADITIONAL,ALLOW_INVALID_DATES';

DROP SCHEMA IF EXISTS `northwind` ;
CREATE SCHEMA IF NOT EXISTS `northwind` DEFAULT CHARACTER SET latin1 ;
USE `northwind` ;

-- -----------------------------------------------------
-- Table `northwind`.`customers`

jhunt

apiVersion: cert-manager.io/v1alpha2
kind: ClusterIssuer
metadata:
  name: internal-ca
  namespace: cert-manager
spec:
  selfSigned: {}

jhunt

---
apiVersion: v1
kind: ConfigMap
metadata:
  name: buffalo-lab-boshes

data:
  vcenter_ip:      your.vsphere.example.com
  vcenter_dc:      dc1
  vcenter_cluster: cluster1

jhunt

apiVersion: v1
kind: Pod
metadata:
  name: its-a-pod
spec:
  containers:
  - image: filefrog/k8s-hacks:falldown
    name: its-a-pod

jhunt

Watching Upstream Releases

For a while now I've had an idea for a VERY lightweight CI/CD solution based on Kubernetes CronJobs, and a bespoke set of heuristic "version checkers" that can parse a single source -- HTTP downloads listing, a GitHub repository's release feed, etc. -- and determine if you need to go download a new thing.

This is a quick hacky sketch of what those checkers might look like, because it's late, I can't sleep, and I'm otherwise unoccupied.

jhunt

diff --git a/jobs/kubelet/templates/bin/kubelet b/jobs/kubelet/templates/bin/kubelet
index c5b0e52..a52cb13 100644
--- a/jobs/kubelet/templates/bin/kubelet
+++ b/jobs/kubelet/templates/bin/kubelet
@@ -34,6 +34,7 @@ end
 
 # set kube-* binaries in our path
 export PATH=$PATH:/var/vcap/packages/k8s/bin
+export PATH=$PATH:/var/vcap/packages/jq/bin
 

jhunt

# Internship Projects
#sw

These are write-ups for potential internship projects.  These projects are fully self-contained (though they most assuredly exist within the confines of a larger project like SHIELD or Cloud Foundry), and can be executed within 3 months by a team of 3-4 moderately talented junior-year computer science students.

## SHIELD etcd Data Protection Plugin
The Kubernetes container orchestration system relies on a single persistent data store for its metadata and configuration needs: etcd.  This distributed key-value store is vital to the proper operation of Kubernetes and, assuming identical replacement hardware / component configuration, the data in etcd is all that an operator needs to resurrect a dead cluster.

Design and build a SHIELD Data Protection Plugin for backing up the data in etcd, and restoring data to etcd from those archives.  This plugin must work within the existing contract SHIELD has for "target" plugins.  To enable this effort, you will need to be able to deploy and va

jhunt

#!/bin/bash
set -eu

useradd jhunt -Nm -c 'James Hunt' -d /home/jhunt -g staff -G staff -s /bin/bash

cat >/etc/sudoers.d/staff <<EOF
%staff ALL=(ALL:ALL) NOPASSWD:ALL
EOF

install -d -o jhunt -g staff -m 0700 ~jhunt/.ssh