add drone ci demo

Makefile

@@ -12,5 +12,8 @@ demo-configfile:
 demo-tilt:
 	scripts/tilt.sh
 
+demo-drone:
+	scripts/drone.sh
+
 prep:
 	scripts/prep.sh

README.md

@@ -4,9 +4,10 @@
 
 - [`docker`](https://docs.docker.com/get-docker/)
 - [`k3d >= v4.0.0`](https://k3d.io/#installation)
-- (optional) [`tilt`](https://docs.tilt.dev/install.html)
 - [`kubens`](/~https://github.com/ahmetb/kubectx) callable via the `kubens` binary
 - [`chromium`](https://www.chromium.org/Home) callable via the `chromium` binary
+- (optional) [`tilt`](https://docs.tilt.dev/install.html)
+- (optional) [`drone`](https://docs.drone.io/cli/install/)
 
 ## Resources
 
@@ -18,7 +19,8 @@
 ## Run
 
 - Preparation (attention: clears all docker settings!): `make prep`
-- Full k3d lifecycle and usage demo: `make demo`
-- Multi-Server Setup demo: `make demo-multiserver`
-- Config File Demo: `make demo-configfile`
-- Demo with Tilt: `make demo-tilt`
+- Demo: Full k3d lifecycle and usage with a Python App using hot-reloading of code: `make demo`
+- Demo: Multi-Server Setup: `make demo-multiserver`
+- Demo: Creating a cluster from a config file: `make demo-configfile`
+- Demo: Using k3d with a managed registry and Tilt for app-reloading: `make demo-tilt`
+- Demo: Useing k3d as a service in a Drone CI pipeline: `make demo-drone`

scripts/drone.sh

@@ -0,0 +1,14 @@
+#!/bin/bash
+
+CURR_DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" >/dev/null 2>&1 && pwd )"
+[ -d "$CURR_DIR" ] || { echo "FATAL: no current dir (maybe running in zsh?)";  exit 1; }
+
+# shellcheck source=./common.sh
+source "$CURR_DIR/common.sh"
+
+configfile=./ci/k3d-drone.yaml
+
+section "Running Drone pipeline (./.drone.yml, which uses a k3d config)"
+log "INFO: This will create a kubeconfig file in your workspace, which will be owned by root (as the Drone CI containers run as root)!\n"
+printf "${CYA}********************${END}\n# k3d config file used by Drone CI\n$(cat $configfile)\n${CYA}********************${END}\n"
+info_pause_exec "Running drone locally (using docker)" "drone exec --pipeline=main --trusted"