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@phemmer
phemmer / jobsync.sh
Last active June 14, 2016 22:02
Process synchronization shell script
#!/bin/bash
exec 3<"$0"
flock -s 3
for (( i=0; i<5; i++ )); do
(
sleeptime=$(( RANDOM % 6 ))
echo $(date) - $BASHPID sleeping $sleeptime
sleep $sleeptime
@phemmer
phemmer / go-clean-archives.sh
Created January 5, 2016 17:01
git clean stale archives
#!/bin/bash
eval "$(go env)"
function clean_gopath() {
gopath="$1"
pkgpath="$gopath/pkg/${GOHOSTOS}_$GOHOSTARCH"
if [[ ! -e "$pkgpath" ]]; then
return
fi
#!/bin/bash
docker=docker
docker=/home/phemmer/git/docker/bundles/latest/dynbinary/docker
cd $(mktemp -d)
cat > entrypoint.sh <<'EOF'
#!/bin/sh
cp /etc/resolv.conf /etc/resolv.conf.orig
#!/bin/bash
docker=docker
cd $(mktemp -d)
cat > entrypoint.sh <<'EOF'
#!/bin/sh
cp /etc/resolv.conf /etc/resolv.conf.orig
echo "nameserver 127.0.0.1" > /etc/resolv.conf
@phemmer
phemmer / server.rb
Created December 7, 2015 05:13
ruby rack hello world
#!/usr/bin/ruby
require 'rack'
require 'rack/server'
class HelloWorld
def response
[200, {}, 'Hello World']
end
end
#!/bin/bash
sed -i -e 's# --cloud-provider=aws##' /etc/systemd/system/kubelet.service
sed -i -e 's#ExecStart=/usr/bin/kubelet #ExecStart=/usr/bin/kubelet --cloud-provider=aws #' /etc/systemd/system/kubelet.service
systemctl daemon-reload
systemctl restart kubelet.service
#!/bin/bash
set -e
. /run/coreos-kubernetes/options.env
: ${K8S_VER:=latest}
curl -s https://storage.googleapis.com/kubernetes-release/release/$K8S_VER/bin/linux/amd64/kubelet > /tmp/kubelet
mkdir -p /opt
install -m 0755 /tmp/kubelet /opt/kubelet-$K8S_VER
@phemmer
phemmer / main_test.go
Last active November 1, 2015 00:36
golang slow range array
package main
import (
"testing"
)
var MyArray = [100]int{0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99}
var MyVar int
func BenchmarkArray(b *testing.B) {
@phemmer
phemmer / main.go
Created September 23, 2015 04:41
xml rsa private key to pem converter in golang
/*
Usage: go run main.go < /path/to/private-key.xml
Optionally takes base64 encoded input.
This is a very crude implementation. Any errors result in a panic.
*/
package main
import (
@phemmer
phemmer / main_test.go
Created May 12, 2015 16:31
go hash benchmark
package main
import (
"crypto/md5"
"crypto/sha1"
"crypto/sha256"
"fmt"
"hash/crc32"
"testing"
)