prometheus k8s #32

Supports: kubernetes

Deploy this charm on Kubernetes with the CLI. Find out how by reading the docs.

Description

A CAAS charm to deploy Prometheus.


Overview

Prometheus for Juju CAAS

Testing

The tests of this charm are done using tox and Zaza.

Prepare environment

The machine in which the tests are run needs access to a juju k8s controller. The easiest way to approach this is by executing the following commands:

sudo apt install tox -y
sudo snap install microk8s --classic
sudo snap install juju

microk8s.status --wait-ready
microk8s.enable storage dashboard dns

juju bootstrap microk8s k8s-cloud

If /usr/bin/python does not exist, you should probably need to do this:

sudo ln -s /usr/bin/python3 /usr/bin/python

Build Charm

Download dependencies:

mkdir -p ~/charm/layers ~/charm/build ~/charm/interfaces
git clone https://git.launchpad.net/canonical-osm ~/canonical-osm

cd ~/charm/layers
git clone https://git.launchpad.net/charm-k8s-prometheus prometheus-k8s 

cd ~/charm/interfaces
mv ~/canonical-osm/charms/interfaces/* .

Charm structure:

├── config.yaml
├── icon.svg
├── layer.yaml
├── metadata.yaml
├── reactive
│   ├── spec_template.yaml
│   └── prometheus.py
├── README.md
├── test-requirements.txt
├── tests
│   ├── basic_deployment.py
│   ├── bundles
│   │   ├── prometheus-ha.yaml
│   │   └── prometheus.yaml
│   └── tests.yaml
└── tox.ini

Setup environment variables:

export CHARM_LAYERS_DIR=~/charm/layers
export CHARM_BUILD_DIR=~/charm/build
export CHARM_INTERFACES_DIR=~/charm/interfaces

Build:

mkdir ~/charm/layers/prometheus-k8s/tests/build
charm build ~/charm/layers/prometheus-k8s
mv ~/charm/build/* ~/charm/layers/prometheus-k8s/tests/build/

Test charm with Tox

cd ~/charm/layers/prometheus-k8s
tox -e func

Configuration

advertised-hostname
(string) Advertised hostname
prometheus
advertised-port
(int) Prometheus Port
9090
alpine-image
(string) OCI image
rocks.canonical.com:443/alpine:latest
default-target
(string) Default target to be added in Prometheus
prometheus-image
(string) OCI image
rocks.canonical.com:443/prom/prometheus:latest
web-subpath
(string) Subpath for accessing Prometheus
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