Installing OpenFaaS on Fedora CoreOS

OpenFaaS (Functions as a Service) is a highly-scalable, open-source framework that allows developers to create event-driven, serverless functions. In this tutorial, we will walk you through the process of installing OpenFaaS on Fedora CoreOS, the latest version of Fedora.

Step 1: Install the OpenFaaS CLI

The OpenFaaS CLI is used to deploy and manage serverless functions on OpenFaaS. To install it, run the following command:

sudo curl -sL https://cli.openfaas.com | sudo sh

Step 2: Install k3sup

k3sup is a lightweight utility for installing K3s, a lightweight Kubernetes distribution, and other Kubernetes tools. It can be used to easily deploy a Kubernetes cluster on Fedora CoreOS. To install k3sup, run the following commands:

sudo dnf install -y python3-pip
sudo pip3 install k3sup

Step 3: Deploy Kubernetes

With k3sup installed, we can now deploy Kubernetes on Fedora CoreOS. To do so, run the following command:

k3sup install \
  --cluster \
  --ip <FEDORA_COREOS_IP_ADDRESS> \
  --user core \
  --k3s-extra-args '--disable traefik'

Replace <FEDORA_COREOS_IP_ADDRESS> with the IP address of your Fedora CoreOS machine.

Step 4: Setup OpenFaaS

Now that we have a running Kubernetes cluster, we can install OpenFaaS. To do so, run the following commands:

kubectl apply -f https://raw.githubusercontent.com/openfaas/faas-netes/master/namespaces.yml
kubectl apply -f https://raw.githubusercontent.com/openfaas/faas-netes/master/helm/faas-netes/crds/crd-prometheus.yml
helm repo add openfaas https://openfaas.github.io/faas-netes/
helm upgrade openfaas --install openfaas/openfaas \
    --namespace openfaas  \
    --set functionNamespace=openfaas-fn \
    --set generateBasicAuth=true \
    --set basicAuthPlugin.replicas=1 \
    --set gateway.replicas=1 \
    --set queueWorker.replicas=1 \
    --set faasIdler.dryRun=false \
    --set faasIdler.inactivityDuration=120s \
    --set faasIdler.inactivityPauseDuration=60s \
    --set faasIdler.reconcileInterval=10s \
    --set prometheus.enabled=true \
    --set prometheus.serviceMonitor.enabled=true \
    --set prometheus.serviceMonitor.namespace=openfaas \
    --set prometheus.serviceMonitor.selector.release=openfaas \
    --set prometheus.rule.labels.faas_function="" \
    --set prometheus.rule.labels.faas_namespace="" \
    --set prometheus.rule.labels.faas_uid="" \
    --set prometheus.rule.labels.gateway="" \
    --set prometheus.rule.labels.image="" \
    --set prometheus.rule.labels.invocation_name="" \
    --set prometheus.rule.labels.replicas=""

This will install OpenFaaS and set it up with Prometheus for monitoring.

Step 5: Access OpenFaaS

To access the OpenFaaS dashboard, we need to create a port-forward connection. Run the following command:

kubectl port-forward svc/gateway -n openfaas 8080:8080 &

Now, open your web browser and go to http://localhost:8080. You should see the OpenFaaS dashboard.

Conclusion

In this tutorial, we covered the process of installing OpenFaaS on Fedora CoreOS. With OpenFaaS installed, you can now create, deploy and manage your serverless functions on your Fedora CoreOS machine.

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