probe

probe is an API service that performs active healthchecks of any http/https service.
It provides a UI of status tiles to provide real-time visualisation of configured probes.
Suitable for quickly validating microservice health or configured firewall rules.

Probes can be configured via either the included CLI or the REST API.

TLDR; Install

via Docker: Shell Integration

Builds a shell command that links to the docker container.
Requires docker installed on your system.

docker run apnex/probe shell > probe-cli
chmod +x probe-cli
mv probe-cli /usr/bin/

[OPTIONAL] set server listening port

PROBE_SERVER_PORT is the server listening TCP port
Defaults to 4040 if not specified

export PROBE_SERVER_PORT=4040

Once shell integration installed, probe can be controlled directly via the probe-cli shell command.
See Usage below

via Docker run: [Manual]

This is where we manually start the container using docker run
This is not required if you have performed Shell Integration
Subsequent commands are then issued using docker exec commands.

Start the container in background:

docker run -d -P --net host \
	--name probe \
	-e PROBE_SERVER_PORT=4040 \
apnex/probe

NOTE: It is preferable to use --net host so that the UI reports the correct hostname of the server

Where:

• PROBE_SERVER_PORT is the server listening TCP port. Defaults to 4040 if not specified

Then issue one or more docker exec commands:

docker exec -t probe cli <cmd>

Clean up docker container when done:

docker rm -f probe

PROBE TYPES

HTTP / HTTPS

Generates a HTTP HEAD request to the configured probe endpoint
Default polling interval = 5 seconds
Default retries on failure = 2

USAGE

probe includes a CLI for terminal access to probe configuration
The following examples assume you have configured Shell Integration
If you are using docker exec - append the <cmd> to the docker exec -t probe cli command

CLI format is probe-cli <cmd>
API examples use CURL + JQ and assume server listening at locahost:4040

---

list

Get available commands

probe-cli list

probes.create

Create a new probe

probe-cli probes.create probe0 https://labops.sh

API

read -r -d "" BODY <<EOF
{
	"name": "probe0",
	"endpoint": "https://labops.sh"
}
EOF
curl -s -X POST \
	-H "Content-Type: application/json" \
	-d "${BODY}" \
http://localhost:4040/probes

probes.list

List all probes

probe-cli probes.list

API

curl -s http://localhost:4040/probes | jq --tab .

probes.get

Get a specific probe

probe-cli probes.get probe0

API

curl -s http://localhost:4040/probes/probe0 | jq --tab .

probes.delete

Delete an existing probe

probe-cli probes.delete probe0

API

curl -s -X DELETE http://localhost:4040/probes/probe0

stop

Stops the server

probe-cli stop