This repository is an Elixir learning exercise.
Disclaimer : Do not use this code in production.
The subject of this exercise is to play with OTP : GenServer, Supervisor.
Periodically ping HTTP requests and verify if some expectations are met.
(fancy pingdom, betteruptime)
If the expectations fail then send a Pushover alert.
(read more for about the service : Pushover)
mix deps.getCopy the YAML configuration file and edit them to suit your needs:
cd config
cp SAMPLE.sentinels.yml sentinels.yml
cp SAMPLE.pushover.yml pushover.ymlRun the application:
mix run --no-haltExample of the sentinels YAML configuration file:
#
# The minimal information to provide for a sentinel:
# (the url, the interval time of each request, the expected http status code)
#
- url: https://my-website-1.com # URL to ping
every: 2h # Check every 2h
expects:
status: 200 # Expected HTTP status 200
#
# Full sample with all possible expectations:
#
- url: https://my-website-1.com/pageA.html # URL to ping
every: 1mn # Check every 1mn
expects:
status: 200 # Expected HTTP status 200
max_duration: 2000 # Request duration must be < 2000ms
length:
- { value: 500, op: ">" } # Body length must > 500 bytes
- { value: 3500, op: "<" } # Body length must < 3500 bytes
- { value: 2990, op: "=" } # Body length must equals to 2990 bytes
body:
- { value: "Foo", op: "c" } # Body must contains the string "Foo"
- { value: "ok", op: "=" } # Body must be equals to the string "ok"
- { value: "45472e018aa13b55dfcf510336049b7e", op: "md5" } # Body md5 must be equals to 4547....9b7e
headers:
- { name: "csrf-token", op: "?" } # Header "csrf-token" must be present (no matter his value)
- { name: "content-type", value: "text/html", op: "c" } # Header "content-type" must contains "text/html"
- { name: "content-type", value: "text/html;charset=utf-8", op: "=" } # Header "content-type" must be equals to
- { name: "content-length", value: 500, op: ">" } # Header must be > to 500
- { name: "content-length", value: 3000, op: "<" } # Header must be < to 3000
- { name: "content-length", value: 2991, op: "=" } # Header must be = 2991
- url: https://my-website-2.com
every: 5mn
expects:
status: 401
max-duration: 500-
The
everyattribute format can be in minutes or hours:<int>mn: 1mn, 12mn, 38mn<int>h: 1h, 3h, 12h
-
max_durationis in milliseconds -
For the header expectations when using the operators
>,<or=, the value of the header must an integer or can be converted to integer."
React
Typescript
Django
Laravel
Facebook
Microsoft
Google
Alibaba
D3
Tencent