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@anapsix anapsix/rkind.sh
Last active Jan 31, 2020

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Rancher in KIND (Rancher in Kubernetes-in-Docker)
#!/usr/bin/env bash
#
# RKIND is a naive helper script to start KIND and Rancher Management Server
#
set -u
set -o pipefail
RANCHER_CONTAINER_NAME="rancher-for-kind"
RANCHER_HTTP_HOST_PORT=$[$[RANDOM%9000]+30000]
RANCHER_HTTPS_HOST_PORT=$[$[RANDOM%9000]+30000]
: ${KIND_CLUSTER_NAME:="kind-for-rancher"}
: ${KIND_IMAGE_TAG:="v1.15.3"}
info() {
if [[ ${QUIET:-0} -eq 0 ]] || [[ ${DEBUG:-0} -eq 1 ]]; then
echo >&2 -e "\e[92mINFO:\e[0m $@"
fi
}
warn() {
if [[ ${QUIET:-0} -eq 0 ]] || [[ ${DEBUG:-0} -eq 1 ]]; then
echo >&2 -e "\e[33mWARNING:\e[0m $@"
fi
}
debug(){
if [[ ${DEBUG:-0} -eq 1 ]]; then
echo >&2 -e "\e[95mDEBUG:\e[0m $@"
fi
}
error(){
local msg="$1"
local exit_code="${2:-1}"
echo >&2 -e "\e[91mERROR:\e[0m $1"
if [[ "${exit_code}" != "-" ]]; then
exit ${exit_code}
fi
}
getval() {
local x="${1%%=*}"
if [[ "$x" = "$1" ]]; then
echo "${2}"
return 2
else
echo "${1##*=}"
return 1
fi
}
usage() {
cat <<EOM
This script syncs DDC providers with Cloudflare KV.
Usage: $0 [FLAGS] [ACTIONS]
FLAGS:
-h | --help | --usage displays usage
-q | --quiet enabled quiet mode, no output except errors
--debug enables debug mode, ignores quiet mode
ACTIONS:
--create create new Rancher & Kind cluster
--destroy destroy Rancher & Kind cluster created by this script
Examples:
\$ $0 --create
\$ $0 --destroy
EOM
}
case $(uname -s) in
Darwin)
localip="$(ipconfig getifaddr en0)"
;;
Linux)
localip="$(hostname -i)"
;;
*)
echo >&2 "Unsupported OS, exiting.."
exit 1
;;
esac
## Get CLI arguments
while [[ $# -gt 0 ]]; do
case "$1" in
-h|--help|--usage)
usage
exit 0
;;
-d|--debug)
DEBUG=1
shift 1
;;
-q|--quiet)
QUIET=1
shift 1
;;
--create|--init)
MODE="create"
shift 1
;;
--destroy|--cleanup)
MODE="destroy"
shift 1
;;
*)
error "Unexpected option \"$1\"" -
usage
exit 1
;;
esac
done
set -e
# check docker binary availability
if ! which docker >/dev/null; then
error "Docker binary cannot be found in PATH" -
error "Install Docker or check your PATH, exiting.."
fi
# check KIND binary availability
if ! which kind >/dev/null; then
error "KIND binary is missing" -
error "Install it with \"go get sigs.k8s.io/kind\"" -
error "Or download appropriate binary from https://github.com/kubernetes-sigs/kind/releases" -
error "For more details see:" -
error " - https://kind.sigs.k8s.io" -
error " - https://github.com/kubernetes-sigs/kind" -
error "exiting.."
fi
if [[ "${MODE:-}" == "destroy" ]]; then
info "Destroying Rancher container.."
if ! docker rm -f ${RANCHER_CONTAINER_NAME}; then
error "failed to remove Rancher container \"${RANCHER_CONTAINER_NAME}\".." -
fi
info "Destroying Kind cluster.."
if ! kind delete cluster --name ${KIND_CLUSTER_NAME}; then
error "failed to delete Kind cluster \"${KIND_CLUSTER_NAME}\".." -
fi
exit 0
elif [[ "${MODE:-}" != "create" ]]; then
usage
exit 0
fi
# Launch Rancher server
if [[ $(docker ps -f name=${RANCHER_CONTAINER_NAME} -q | wc -l) -ne 0 ]]; then
error "Rancher container already present, delete it before trying again, exiting.."
fi
info "Launching Rancher container"
if docker run -d \
--restart=unless-stopped \
--name ${RANCHER_CONTAINER_NAME} \
-p ${RANCHER_HTTP_HOST_PORT}:80 \
-p ${RANCHER_HTTPS_HOST_PORT}:443 \
rancher/rancher; then
info "Rancher UI will be available at https://${localip}:${RANCHER_HTTPS_HOST_PORT}"
info "It might take few up to 60 seconds for Rancher UI to become available.."
info "While it's coming up, going to start KIND cluster"
fi
# Start KIND cluster
if [[ $(kind get clusters | grep -c ${KIND_CLUSTER_NAME}) -ne 0 ]]; then
warn "KIND cluster is already running.."
echo >&2 -n "Use running KIND? [y/N] "
read use_running_kind
case $use_running_kind in
n|N)
echo >&2 "exiting.."
exit 1
;;
y|Y)
echo >&2 "ok, continuing.."
;;
*)
error "unrecognized option, exiting.."
;;
esac
else
info "Creating Kind cluster.."
kind create cluster --name ${KIND_CLUSTER_NAME} --image kindest/node:${KIND_IMAGE_TAG}
fi
cat >&2 <<EOM
### Next steps ###
- Setup admin credentials in Rancher UI
- Set "Rancher Server URL" to "https://${localip}:${RANCHER_HTTPS_HOST_PORT}" (should already be selected)
you may change it at any time in "Settings"
- Import KIND cluster to Rancher (via https://${localip}:${RANCHER_HTTPS_HOST_PORT}/g/clusters/add?provider=import)
(select "Import Existing cluster" when adding a cluster)
> To work around "Unable to connect to the server: x509: certificate signed by unknown authority"
> use "curl --insecure" to get the manigest, piping it's output to
> KUBECONFIG="\$(kind get kubeconfig-path --name=${KIND_CLUSTER_NAME})" kubectl apply -f -
To shut everything down, use "$0 cleanup", or manually with
docker rm -f ${RANCHER_CONTAINER_NAME}; kind delete cluster ${KIND_CLUSTER_NAME}
EOM
# Open Rancher UI in browser
open https://${localip}:${RANCHER_HTTPS_HOST_PORT}
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