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17 changes: 17 additions & 0 deletions README.md
Original file line number Diff line number Diff line change
@@ -1,3 +1,20 @@
# Kubernetes + Let's Encrypt Automatic Cert Generation

Demo for how to automatically create https certs on Kubernetes using Let's encrypt


docker build -t gcr.io/dht-2718/letsencrypt:testserver .
gcloud docker -- push gcr.io/dht-2718/letsencrypt:testserver

http://frameworthyfilms.com/.well-known/acme-challenge/blank

POD=$(kubectl get pods | grep nginx | awk '{print $1}')
kubectl exec $POD -it bash
apt-get update && apt-get install curl -qq -y # Terrible, I know
curl letsencrypt # Name of the service


docker build -t gcr.io/dht-2718/letsencrypt:getcreds .
gcloud docker -- push gcr.io/dht-2718/letsencrypt:getcreds


1 change: 0 additions & 1 deletion kube-nginx-letsencrypt/Dockerfile
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Expand Up @@ -5,7 +5,6 @@ RUN dnf install certbot -y && dnf clean all
RUN mkdir /etc/letsencrypt

COPY secret-patch-template.json /
COPY deployment-patch-template.json /
COPY entrypoint.sh /

CMD ["/entrypoint.sh"]
14 changes: 12 additions & 2 deletions kube-nginx-letsencrypt/entrypoint.sh
Original file line number Diff line number Diff line change
Expand Up @@ -15,16 +15,26 @@ NAMESPACE=$(cat /var/run/secrets/kubernetes.io/serviceaccount/namespace)
echo "Current Kubernetes namespce: $NAMESPACE"

echo "Starting HTTP server..."
mkdir $HOME/.well-known
mkdir $HOME/.well-known/acme-challenge
echo "This is some text" > $HOME/.well-known/acme-challenge/blank
cd $HOME
python -m SimpleHTTPServer 80 &
PID=$!
echo "sleeping 1m"
sleep 1m
echo "Starting certbot..."
certbot certonly --webroot -w $HOME -n --agree-tos --email ${EMAIL} --no-self-upgrade -d ${DOMAINS}
kill $PID
echo "Certbot finished. Killing http server..."

ls $HOME
ls $HOME/.well-known
ls $HOME/.well-known/acme-challenge

echo "Finiding certs. Exiting if certs are not found ..."
CERTPATH=/etc/letsencrypt/live/$(echo $DOMAINS | cut -f1 -d',')
ls $CERTPATH || exit 1
ls $CERTPATH || (echo "sleeping 60m";sleep 60m; exit 1)
kill $PID

echo "Creating update for secret..."
cat /secret-patch-template.json | \
Expand Down