Monitoring¶

Currently, we support two monitoring solutions:

Crow: A simple, lightweight, and built-in monitoring solution, that is enabled by default when you install Codacy.
Prometheus + Grafana + Loki: A comprehensive third-party monitoring solution, recommended for more advanced usage.

The sections below provide details on how to set up each monitoring solution.

Setting up monitoring using Crow¶

Crow displays information about the projects that are pending analysis and the jobs currently running on Codacy.

Crow is installed alongside Codacy when the Helm chart is deployed to the cluster. By default, you can access Crow as follows:

URL: http://<codacy hostname>/monitoring, where <codacy hostname> is the hostname of your Codacy instance
Username: codacy
Password: C0dacy123

We highly recommend that you define a custom password for Crow, if you haven't already done it when installing Codacy:

Edit the value of crow.config.passwordAuth.password in the values-production.yaml file that you used to install Codacy:
```
crow:
  config:
    passwordAuth:
      password: C0dacy123
```
Apply the new configuration by performing a Helm upgrade. To do so execute the command used to install Codacy:

Important

If you are using MicroK8s you must use the file values-microk8s.yaml together with the file values-production.yaml.

To do this, uncomment the last line before running the helm upgrade command below.
```
helm upgrade (...options used to install Codacy...) \
             --version 1.4.0 \
             --values values-production.yaml \
             # --values values-microk8s.yaml
```

Setting up monitoring using Grafana, Prometheus, and Loki¶

Prometheus is an open-source systems monitoring and alerting toolkit. Logs can be collected using Loki, which is a horizontally-scalable, highly-available, multi-tenant log aggregation system. Its data can be visualized with Grafana, a widely used open source analytics and monitoring solution.

This solution is considerably more resource demanding than Crow, and is recommended only for more advanced usage. Furthermore, its installation, configuration, and management require a deeper knowledge of Kubernetes as each component must be carefully tweaked to match your specific use case, using as starting point the .yaml values files provided by us.

The instructions below cover the basic installation of the components in this monitoring stack.

1. Installing Prometheus¶

The simplest way to set up Prometheus in your cluster is by using the Prometheus Operator bundle.

Add the custom resources required for installing this bundle in your cluster:

Important

If you are using MicroK8s use microk8s.kubectl instead of kubectl.

kubectl apply -f "https://raw.githubusercontent.com/coreos/prometheus-operator/release-0.38/example/prometheus-operator-crd/monitoring.coreos.com_alertmanagers.yaml"
kubectl apply -f "https://raw.githubusercontent.com/coreos/prometheus-operator/release-0.38/example/prometheus-operator-crd/monitoring.coreos.com_podmonitors.yaml"
kubectl apply -f "https://raw.githubusercontent.com/coreos/prometheus-operator/release-0.38/example/prometheus-operator-crd/monitoring.coreos.com_prometheuses.yaml"
kubectl apply -f "https://raw.githubusercontent.com/coreos/prometheus-operator/release-0.38/example/prometheus-operator-crd/monitoring.coreos.com_prometheusrules.yaml"
kubectl apply -f "https://raw.githubusercontent.com/coreos/prometheus-operator/release-0.38/example/prometheus-operator-crd/monitoring.coreos.com_servicemonitors.yaml"
kubectl apply -f "https://raw.githubusercontent.com/coreos/prometheus-operator/release-0.38/example/prometheus-operator-crd/monitoring.coreos.com_thanosrulers.yaml"

2. Installing Loki¶

Obtain the configuration file for Loki, values-loki.yaml, and install it by running the command below. While the default storage class setting for Loki persistence should suit most use cases, you may need to adjust it to your specific Kubernetes installation. For instance, for MicroK8s use storageClassName: microk8s-hostpath.

helm repo add loki https://grafana.github.io/loki/charts

kubectl create namespace monitoring

helm upgrade --install --atomic --timeout 600s loki loki/loki \
  --version 0.28.1 --namespace monitoring --values values-loki.yaml

3. Installing Promtail¶

Promtail is an agent that ships the contents of local logs to a Loki instance.

Obtain the configuration file for Promtail, values-promtail.yaml, and install it by running the command below.

helm upgrade --install --atomic --timeout 600s promtail loki/promtail \
  --version 0.22.2 --namespace monitoring --values values-promtail.yaml

4. Installing Prometheus and Grafana¶

Obtain the configuration file for the Prometheus Operator bundle, values-prometheus-operator.yaml. Then:

Edit the Grafana password for the admin user and the hostname for grafana in the values-prometheus-operator.yaml file.
Install the bundle on your cluster by running the command below.

helm upgrade --install --atomic --timeout 600s monitoring stable/prometheus-operator \
  --version 8.13.8 --namespace monitoring --values values-prometheus-operator.yaml

Follow the Kubernetes documentation to access the Grafana service that is now running on your cluster, using the method that best suits your use case.

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Last modified August 25, 2020