Sensu Go

sensu-go-notes.md

References

https://docs.sensu.io/sensu-go/5.2/

https://blog.sensu.io/alert-fatigue-part-1-avoidance-and-course-correction

Sensu checks

Bonsai is the registry of checks and handlers.

Create check from a script

sudo curl https://raw.githubusercontent.com/sensu-plugins/sensu-plugins-cpu-checks/03a99bab0237c81121ce702b0c5a5a3b44908535/bin/check-cpu.sh \
-o /usr/local/bin/check-cpu.sh && \
sudo chmod +x /usr/local/bin/check-cpu.sh

sensuctl check create check-cpu \
--command 'check-cpu.sh -w 75 -c 90' \
--interval 60 \
--subscriptions linux

source

Monitor an external resource (proxy entity)

sudo curl https://raw.githubusercontent.com/sensu/sensu-go/5.1.0/examples/checks/http_check.sh \
-o /usr/local/bin/http_check.sh && \
sudo chmod +x /usr/local/bin/http_check.sh

check.json

{
  "type": "CheckConfig",
  "api_version": "core/v2",
  "metadata": {
    "name": "check-http",
    "namespace": "default"
  },
  "spec": {
    "command": "http_check.sh https://sensu.io",
    "interval": 60,
    "proxy_entity_name": "sensu-site",
    "publish": true,
    "subscriptions": [
      "proxy"
    ]
  }
}

sensuctl create --file check.json

Add the subscription to an agent.

subscriptions:
  - "proxy"

sudo service sensu-agent restart

source

Sensu ruby plugin install

https://packagecloud.io/sensu/community

curl -s https://packagecloud.io/install/repositories/sensu/community/script.rpm.sh | sudo bash

sudo yum install sensu-plugins-ruby-0.2.0-1.el7.x86_64