Helm

Table of contents

1. Repository
2. Deploy
   1. Chart Values
3. Ingress Controller
4. Examples

---

Repository

This chart repository can be added to helm with

helm repo add ealenn https://ealenn.github.io/charts
helm repo update

More information on Artifact Hub

Deploy

helm upgrade -i ${name} ealenn/echo-server --namespace ${namespace} --force

Example: helm upgrade -i echo-server ealenn/echo-server --namespace echo-server --force

Chart Values

You can override values with example.values.yaml file

curl https://raw.githubusercontent.com/Ealenn/Echo-Server/master/docs/examples/echo.helm.yaml \
  --output ./example.values.yaml

replicaCount: 5

ingress:
  enabled: true
  hosts:
    - host: echo.cluster.local
      paths:
        - /
  annotations:
    kubernetes.io/ingress.class: nginx

  application:
    logs:
      ignore:
        ping: true

helm upgrade -i \
  -f ./example.values.yaml \
  echo-server ealenn/echo-server \
  --namespace echo-server \
  --force

Ingress Controller

You can use Nginx Ingress Controller for try Echo-Server with :

helm install stable/nginx-ingress --name nginx --namespace nginx

Examples

Custom responses

Query	Header	Content	Conditions
?echo_code=	X-ECHO-CODE	HTTP code 200, 404	200 <= CODE <= 599
		404-401 or 200-500-301
?echo_body=	X-ECHO-BODY	Body message
?echo_env_body=	X-ECHO-ENV-BODY	The key of environment variable	Enable environment true
?echo_header=	X-ECHO-HEADER	Response Header Lang: en-US	Enable header true
?echo_time=	X-ECHO-TIME	Wait time in ms	0 <= TIME <= 60.000
?echo_file=	X-ECHO-FILE	Path of Directory or File	Enable file true

You can change commands and conditions.

Custom HTTP Status Code

➜ curl -I --header 'X-ECHO-CODE: 404' echo.cluster.local
➜ curl -I echo.cluster.local/?echo_code=404

HTTP/1.1 404 Not Found

➜ curl -I --header 'X-ECHO-CODE: 404-300' echo.cluster.local
➜ curl -I echo.cluster.local/?echo_code=404-300

HTTP/1.1 404 Not Found
HTTP/1.1 300 Multiple Choices

➜ for i in {1..10}
➜ do
➜    curl -I echo.cluster.local/?echo_code=200-400-500
➜ done

HTTP/1.1 500 Internal Server Error
HTTP/1.1 400 Bad Request
HTTP/1.1 200 OK
HTTP/1.1 500 Internal Server Error
HTTP/1.1 200 OK
HTTP/1.1 500 Internal Server Error

Custom Body

➜ curl --header 'X-ECHO-BODY: amazing' echo.cluster.local
➜ curl echo.cluster.local/?echo_body=amazing

"amazing"

Custom Body with environment variable value

➜ curl --header 'X-ECHO-ENV-BODY: HOSTNAME' echo.cluster.local
➜ curl echo.cluster.local/?echo_env_body=HOSTNAME

"c53a9ed79fa2"

➜ for i in {1..10}
➜ do
➜    curl echo.cluster.local/?echo_env_body=HOSTNAME
➜ done

"c53a9ed79fa2"
"f10c3af61e40"
"c53a9ed79fa2"
"f10c3af61e40"
"c53a9ed79fa2"

Custom Headers

➜ curl --header 'X-ECHO-HEADER: One:1' echo.cluster.local
➜ curl echo.cluster.local/?echo_header=One:1

HTTP/1.1 200 OK
One: 1

➜ curl --header 'X-ECHO-HEADER: One:1, Two:2' echo.cluster.local
➜ curl "echo.cluster.local/?echo_header=One:1,%20Two:2"

HTTP/1.1 200 OK
One: 1
Two: 2

Custom response latency

➜ curl --header 'X-ECHO-TIME: 5000' echo.cluster.local
➜ curl "echo.cluster.local/?echo_time=5000"

⏳... 5000 ms

You can change default validations with

ENVIRONMENT	CLI	Default
CONTROLS__TIMES__MIN	–controls:times:min	0
CONTROLS__TIMES__MAX	–controls:times:max	60000

(Latency is defined in milliseconds)

File/Folder explorer

➜ curl --header 'X-ECHO-FILE: /' echo.cluster.local
➜ curl "echo.cluster.local/?echo_file=/"

["app", "bin", "etc", "usr", "var"]

Combine custom actions

➜ curl --header 'X-ECHO-CODE: 401' --header 'X-ECHO-BODY: Oups' echo.cluster.local
➜ curl "echo.cluster.local/?echo_body=Oups&echo_code=401"

HTTP/1.1 401 Unauthorized
"Oups"