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@aaronweaver aaronweaver Linting f5d6cc6 Mar 20, 2019
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@hendrikhalkow @aaronweaver
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DefectDojo on Kubernetes

DefetDojo Kubernetes utilizes Helm, a package manager for Kubernetes. Helm Charts help you define, install, and upgrade even the most complex Kubernetes application.

For development purposes, minikube and Helm can be installed locally by following this guide.

Kubernetes Local Quickstart

Requirements:

  1. Helm installed locally
  2. Minikube installed locally
  3. Latest cloned copy of DefectDojo
git clone https://github.com/DefectDojo/django-DefectDojo
cd django-DefectDojo

minikube start
minikube addons enable ingress
helm init
helm repo update
helm dependency update ./helm/defectdojo

Now, install the helm chart into minikube:

helm install \
  ./helm/defectdojo \
  --name=defectdojo \
  --set django.ingress.enabled=false

It usually takes up to a minute for the services to startup and the status of the containers can be viewed by starting up minikube dashboard. Note: If the containers are not cached locally the services will start once the containers have been pulled locally.

To be able to access DefectDojo, set up an ingress or access the service directly by running the following command:

kubectl port-forward --namespace=default \
service/defectdojo-django 8080:80

As you set your host value to defectdojo.default.minikube.local, make sure that it resolves to the localhost IP address, e.g. by adding the following two lines to /etc/hosts:

::1       defectdojo.default.minikube.local
127.0.0.1 defectdojo.default.minikube.local

To find out the password, run the following command:

echo "DefectDojo admin password: $(kubectl \
  get secret defectdojo \
  --namespace=default \
  --output jsonpath='{.data.DD_ADMIN_PASSWORD}' \
  | base64 --decode)"

To access DefectDojo, go to http://defectdojo.default.minikube.local:8080. Log in with username admin and the password from the previous command.

Minikube with locally built containers

If testing containers locally, then set the imagePullPolicy to Never, which ensures containers are not pulled from Docker hub.

helm install \
  ./helm/defectdojo \
  --name=defectdojo \
  --set django.ingress.enabled=false \
  --set imagePullPolicy=Never

Build Images Locally

# Build images
docker build -t defectdojo/defectdojo-django -f Dockerfile.django .
docker build -t defectdojo/defectdojo-nginx -f Dockerfile.nginx .

Kubernetes Production

Optionally, for TLS locally, you need to install a TLS certificate into your Kubernetes cluster. For development purposes, you can create your own certificate authority as described here.

# https://kubernetes.io/docs/concepts/services-networking/ingress/#tls
# Create a TLS secret called minikube-tls as mentioned above, e.g.
K8S_NAMESPACE="default"
TLS_CERT_DOMAIN="${K8S_NAMESPACE}.minikube.local"
kubectl --namespace "${K8S_NAMESPACE}" create secret tls defectdojo-tls \
  --key <(openssl rsa \
    -in "${CA_DIR}/private/${TLS_CERT_DOMAIN}.key.pem" \
    -passin "pass:${TLS_CERT_PASSWORD}") \
  --cert <(cat \
    "${CA_DIR}/certs/${TLS_CERT_DOMAIN}.cert.pem" \
    "${CA_DIR}/chain.pem")
# Install Helm chart. Choose a host name that matches the certificate above
helm install \
  ./helm/defectdojo \
  --name=defectdojo \
  --namespace="${K8S_NAMESPACE}" \
  --set host="defectdojo.${TLS_CERT_DOMAIN}" \
  --set django.ingress.secretName="minikube-tls"

# For high availability deploy multiple instances of Django, Celery and RabbitMQ
helm install \
  ./helm/defectdojo \
  --name=defectdojo \
  --namespace="${K8S_NAMESPACE}" \
  --set host="defectdojo.${TLS_CERT_DOMAIN}" \
  --set django.ingress.secretName="minikube-tls" \
  --set django.replicas=3 \
  --set celery.replicas=3 \
  --set rabbitmq.replicas=3

# Run highly available PostgreSQL cluster instead of MySQL - recommended setup
# for production environment.
helm install \
  ./helm/defectdojo \
  --name=defectdojo \
  --namespace="${K8S_NAMESPACE}" \
  --set host="defectdojo.${TLS_CERT_DOMAIN}" \
  --set django.replicas=3 \
  --set celery.replicas=3 \
  --set rabbitmq.replicas=3 \
  --set django.ingress.secretName="minikube-tls" \
  --set mysql.enabled=false \
  --set database=postgresql \
  --set postgresql.enabled=true \
  --set postgresql.replication.enabled=true \
  --set postgresql.replication.slaveReplicas=3

# Note: If you run `helm install defectdojo before, you will get an error
# message like `Error: release defectdojo failed: secrets "defectdojo" already
# exists`. This is because the secret is kept across installations.
# To prevent recreating the secret, add --set createSecret=false` to your
# command.

# Run test. If there are any errors, re-run the command without `--cleanup` and
# inspect the test container.
helm test defectdojo --cleanup

# Navigate to <https://defectdojo.default.minikube.local>.

TODO: The MySQL volumes aren't persistent across helm delete operations. To make them persistent, you need to add an annotation to the persistent volume claim:

kubectl --namespace "${K8S_NAMESPACE}" patch pvc defectdojo-mysql -p \
  '{"metadata": {"annotations": {"\"helm.sh/resource-policy\"": "keep"}}}'

See also https://github.com/helm/charts/blob/master/stable/mysql/templates/pvc.yaml.

However, that doesn't work and I haven't found out why. In a production environment, a redundant PostgreSQL cluster is the better option. As it uses statefulsets that are kept by default, the problem doesn't exist there.

Useful stuff

# View logs of a specific pod
kubectl logs $(kubectl get pod --selector=defectdojo.org/component=${POD} \
  -o jsonpath="{.items[0].metadata.name}") -f

# Open a shell in a specific pod
kubectl exec -it $(kubectl get pod --selector=defectdojo.org/component=${POD} \
  -o jsonpath="{.items[0].metadata.name}") -- /bin/bash

# Open a Python shell in a specific pod
kubectl exec -it $(kubectl get pod --selector=defectdojo.org/component=${POD} \
  -o jsonpath="{.items[0].metadata.name}") -- python manage.py shell

Clean up Kubernetes

# Uninstall Helm chart
helm delete defectdojo --purge
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