dennybaa

K8S tips

CLI

update config map from file

k create cm nginx-lb-config --from-file=nginx-lb.configmap --dry-run -o yaml | k replace cm nginx-lb-config -f -

dennybaa

Docker

exec: Preserve terminal with and colors

Exec preserving terminal options:

$ docker exec -ti --env COLUMNS=`tput cols` --env LINES=`tput lines` ...

run: Pass through SSH_AUTH_SOCK

dennybaa

## Enable --tls substitution for helm tls-enabled commands
#
helm() {
  _context=$(kubectl config current-context)
  if [ -d "${HELM_HOME:-$HOME/.helm}/tls/$_context" ]; then
    export HELM_TLS_CA_CERT="${HELM_HOME:-$HOME/.helm}/tls/$_context/ca.cert.pem"
    export HELM_TLS_CERT="${HELM_HOME:-$HOME/.helm}/tls/$_context/cert.pem"
    export HELM_TLS_KEY="${HELM_HOME:-$HOME/.helm}/tls/$_context/key.pem"
    export HELM_TLS_ENABLE="true"
  fi

dennybaa

#!/bin/sh
#FreeDNS updater script

(which wget > /dev/null) || { echo "wget not found"; exit 1; }
(which nslookup > /dev/null) || { echo "nslookup not found"; exit 1; }

# FREEDNS_APIKEY (loginid|password -> SHA1)
DYNLIST=$(wget -qO- http://freedns.afraid.org/api/?action=getdyndns&sha=${FREEDNS_APIKEY})
NAME="$1"