Update devops stuff

devops/README.md

@@ -39,3 +39,35 @@ devops/run-job.sh screenshotter
 ```nohighlight
 devops/deploy-webapp.sh
 ```
+
+## Einloggen per SSH
+
+```
+export FLOATING_IP=195.201.252.221  # Floating IP im hetzner-Projekt
+ssh -o StrictHostKeyChecking=no -q root@$FLOATING_IP
+```
+
+## LetsEncrypt Zertifikat erneuern
+
+Hostname: `green-spider.netzbegruenung.de`
+
+```
+docker-compose stop webapp
+docker run -it --rm -p 443:443 -p 80:80 --name certbot \
+  -v /etc/letsencrypt:/etc/letsencrypt \
+  -v /var/lib/letsencrypt:/var/lib/letsencrypt \
+  certbot/certbot certonly --standalone -n --email marian@sendung.de --agree-tos -d green-spider.netzbegruenung.de
+docker-compose up -d webapp
+```
+
+## IPv6 "Floating IP" temporär an Device binden
+
+```
+sudo ip addr add 2a01:4f8:1c0c:811f::1 dev eth0
+```
+
+## curl-Zugriff mittels IPv6
+
+```
+curl https://[2a01:4f8:1c0c:811f::1]
+```

devops/functions.bash

@@ -0,0 +1,14 @@
+# Gets the IP address with description "webapp"
+# and stores it in the $IP_IP variable
+function get_ip()
+{
+  echo "Getting IP address"
+
+  RESPONSE=$(curl -s https://api.hetzner.cloud/v1/floating_ips \
+    -H "Content-Type: application/json" \
+    -H "Authorization: Bearer $API_TOKEN")
+
+  IP_ID=$(echo $RESPONSE | jq -r '.floating_ips[] | select(.description == "webapp") | select(.type == "ipv4") | .id')
+  IP_IP=$(echo $RESPONSE | jq -r '.floating_ips[] | select(.description == "webapp") | select(.type == "ipv4") | .ip')
+}
+

devops/ssh.sh

@@ -0,0 +1,16 @@
+#!/bin/bash
+
+# Log in to webapp server via SSH
+
+API_TOKEN_SECRET="secrets/hetzner-api-token.sh"
+test -f $API_TOKEN_SECRET || { echo >&2 "File $API_TOKEN_SECRET does not exist."; exit 1; }
+source $API_TOKEN_SECRET
+
+source devops/functions.bash
+
+get_ip
+
+echo "Use this command for SSH access:"
+echo "ssh -o StrictHostKeyChecking=no root@${IP_IP}"
+
+ssh -o StrictHostKeyChecking=no root@${IP_IP}