get RKE

downloadRKE.sh

#!/bin/sh

# This script is inspired by Istio installation script
#
# The script fetches the latest RKE release
# It's derived from ../downloadRKE.sh which is for stable releases but lets
# users do curl -L https://git.io/getLatestRKE | ISTIO_VERSION=1.1.1 sh -
# for instance to change the version fetched.

# This is the latest release candidate (matches ../istio.VERSION after basic
# sanity checks)

OS="$(uname)"
if [ "x${OS}" = "xDarwin" ] ; then
  OSEXT="darwin"
else
  # TODO we should check more/complain if not likely to work, etc...
  OSEXT="linux"
fi

if [ "x${RKE_VERSION}" = "x" ] ; then
  RKE_VERSION=$(curl -L -s https://api.github.com/repos/rancher/rke/releases | \
                  grep tag_name | sed "s/ *\"tag_name\": *\"\\(.*\\)\",*/\\1/" | \
                  grep -v -E "rc[0-9]{1,2}$" | sort -t"." -k 1,1 -k 2,2 -k 3,3 -k 4,4 | tail -n 1)
fi

LOCAL_ARCH=$(uname -m)
if [ "${TARGET_ARCH}" ]; then
    LOCAL_ARCH=${TARGET_ARCH}
fi

case "${LOCAL_ARCH}" in
  x86_64)
    RKE_ARCH=amd64
    ;;
  armv8*)
    RKE_ARCH=arm64
    ;;
  aarch64*)
    RKE_ARCH=arm64
    ;;
  armv*)
    RKE_ARCH=armv7
    ;;
  amd64|arm64)
    RKE_ARCH=${LOCAL_ARCH}
    ;;
  *)
    echo "This system's architecture, ${LOCAL_ARCH}, isn't supported"
    exit 1
    ;;
esac

if [ "x${RKE_VERSION}" = "x" ] ; then
  printf "Unable to get latest RKE version. Set RKE_VERSION env var and re-run. For example: export RKE_VERSION=1.1.1"
  exit;
fi

NAME="rke_${OSEXT}-${RKE_ARCH}"
URL="https://github.com/rancher/rke/releases/download/${RKE_VERSION}/rke_${OSEXT}-${RKE_ARCH}"

printf "Downloading %s from %s ..." "$NAME" "$URL"
if ! curl -fsLO "$URL"
then
  printf "\n\n"
  printf "Unable to download RKE %s at this moment!\n" "$RKE_VERSION"
  printf "Please verify the version you are trying to download.\n\n"
  exit
fi

printf ""
printf "\nRKE %s Download Complete!\n" "$RKE_VERSION"
printf "\n"
printf "RKE has been successfully downloaded \n"
printf "\n"

exit 0