initial port of cf-env

2018-11-27 11:34:44 +10:00 · 2018-11-27 11:34:44 +10:00 · 73677945fe
commit 73677945fe
7 changed files with 126 additions and 0 deletions
--- a/5
+++ b/5
@ -0,0 +1,5 @@
+source 'https://rubygems.org'
+
+gem 'sinatra'
+gem 'json_pure'
+gem 'puma'
--- a/Gemfile.lock
+++ b/Gemfile.lock
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+GEM
+  remote: https://rubygems.org/
+  specs:
+    json_pure (2.1.0)
+    mustermann (1.0.3)
+    puma (3.12.0)
+    rack (2.0.6)
+    rack-protection (2.0.4)
+      rack
+    sinatra (2.0.4)
+      mustermann (~> 1.0)
+      rack (~> 2.0)
+      rack-protection (= 2.0.4)
+      tilt (~> 2.0)
+    tilt (2.0.8)
+
+PLATFORMS
+  ruby
+
+DEPENDENCIES
+  json_pure
+  puma
+  sinatra
+
+BUNDLED WITH
+   1.16.3
--- a/1
+++ b/1
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+web: rackup -p $PORT
--- a/README.md
+++ b/README.md
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+# Display Knative environment variables
+
+A simple Sinatra application. Once deployed to Knative, it will echo the Environment and HTTP Request Headers.
+
+![demo](docs/images/knative-env.png)
+
+## Deploy
+
+The repo contains a manifest file which creates a new application called `cfenv`, with a random string in the URL to avoid collisions.
+
+To deploy from existing Docker image:
+
+```shell
+knctl deploy -s knative-env -i index.docker.io/drnic/knative-env
+```
+
+To deploy from source, whilst creating new intermediate Docker image (in Docker Hub in example below):
+
+```shell
+knctl basic-auth-secret create -s registry --docker-hub -u <you> -p <password>
+knctl service-account create --service-account build -s registry
+
+kubectl apply -f https://raw.githubusercontent.com/knative/build-templates/master/buildpack/buildpack.yaml
+
+DOCKER_IMAGE=index.docker.io/<you>/knative-env
+knctl deploy -s knative-env -i ${DOCKER_IMAGE} \
+    --service-account build \
+    --template buildpack \
+    --directory .
+```
+
+Deploy with additional environment variables:
+
+```shell
+knctl deploy -s knative-env -i index.docker.io/drnic/knative-env \
+    --env MYVAR1=test1 \
+    --env MYVAR=test2
+```
+
+To view in browser, either setup Ingress and DNS, or use `kwt` as below. All routes from Knative will now work from local machine:
+
+```shell
+sudo -E kwt net start --dns-map-exec='knctl dns-map'
+```
+
--- a/config.ru
+++ b/config.ru
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+require './env'
+run Sinatra::Application
--- a/docs/images/knative-env.png
+++ b/docs/images/knative-env.png
--- a/env.rb
+++ b/env.rb
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+require 'rubygems'
+require 'sinatra'
+require 'json'
+
+get '/' do
+  puts "Current env keys: #{ENV.keys.sort.inspect}"
+  res = "<html><body style=\"margin:0px auto; width:80%; font-family:monospace\">"
+  res << "<head><title>Knative Environment</title><meta name=\"viewport\" content=\"width=device-width\"></head>"
+  res << "<h2>Knative Environment</h2>"
+  res << "<div><table>"
+  ENV.keys.sort.each do |key|
+    value = begin
+                "<pre>" + JSON.pretty_generate(JSON.parse(ENV[key])) + "</pre>"
+            rescue
+                ENV[key]
+            end
+    res << "<tr><td><strong>#{key}</strong></td><td>#{value}</tr>"
+  end
+  res << "</table></div>"
+  res << "<h2>HTTP Request Headers</h2>"
+  res << "<div><table>"
+  env.inject({}){|acc, (k,v)| acc[$1.downcase] = v if k =~ /^http_(.*)/i; acc}.sort.each do |k,v|
+    res << "<tr><td><strong>#{k}</strong></td><td>#{v}</tr>"
+  end
+  res << "</table></div></body></html>"
+end
+
+get '/some-error' do
+  $stderr.puts "This is an error log"
+end
+
+get '/v1/:var' do
+  res = ENV[params['var'] + "\n"]
+end
+
+get '/v1/:var/:json_path' do
+	var = ENV[params['var']]
+	obj = JSON.parse(var)
+	params['json_path'].split(".").each do |k|
+		if obj.is_a?(Array)
+			obj = obj[k.to_i]
+		else
+			obj = obj[k]
+		end
+	end
+	res = obj.to_json + "\n"
+end