Hilft Dir dabei, Deine BÜNDNIS 90/DIE GRÜNEN Website zu optimieren https://green-spider.netzbegruenung.de/
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#!/bin/bash
# This is a Work-In-Progress deployment script for the webapp on Hetzner Cloud.
# it is not yet expected to work.
#
# The general mechanics should be:
# - Detect which server is running the webapp
# - Create a new server
# - Deploy the webapp on the new server
# - Test the new server
# - If okay, bind the public IP to the new server
#
# Requirements:
#
# - curl
# - jq (https://stedolan.github.io/jq/)
# - ssh
# - SSH key referenced in the server details ("ssh_keys")
# - Service account with write permission for Storage and Datastore in
# secrets/datastore-writer.json
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 $API_TOKEN_SECRET
# possible values: cx11 (1 core 2 GB), cx21 (2 cores, 4 GB), cx31 (2 cores, 8 GB)
SERVERTYPE="cx11"
# Gets the IP address with description "webapp"
function get_ip()
{
echo "Getting IP address"
RESPONSE=$(curl -s https://api.hetzner.cloud/v1/floating_ips \
-H "Content-Type: application/json" \
-H "Authorization: Bearer $API_TOKEN")
IP_ID=$(echo $RESPONSE | jq '.floating_ips[] | select(.description == "webapp") | .id')
IP_IP=$(echo $RESPONSE | jq '.floating_ips[] | select(.description == "webapp") | .ip')
}
# find_webapp_server checks which server is currently running the webapp,
# using the "purpose=webapp" label.
function find_webapp_server()
{
RESPONSE=$(curl -s "https://api.hetzner.cloud/v1/servers?label_selector=purpose=webapp" \
-H "Content-Type: application/json" \
-H "Authorization: Bearer $API_TOKEN")
CURRENT_SERVER_ID=$(echo $RESPONSE | jq '.servers[0] | .id')
CURRENT_SERVER_IP=$(echo $RESPONSE | jq '.servers[0] | .ip')
if [ "$CURRENT_SERVER_ID" = "null" ]; then
echo "Currently there is no server"
else
echo "Current server has ID $CURRENT_SERVER_ID and IP $CURRENT_SERVER_IP"
fi
}
# create_server creates a new server to deploy the webapp.
function create_server()
{
SERVERNAME=webapp-$(date -u '+%FT%H-%M')
echo "Creating server named $SERVERNAME"
# server_type 'cx11' is the smallest, cheapest category.
# location 'nbg1' is Nürnberg/Nuremberg, Germany.
# image 'debian-9' is a plain Debian stretch.
# ssh_keys ['Marian'] adds Marian's public key to the server and can be extended.
# user_data: Ensures that we can detect when the cloud-init setup is done.
#
CREATE_RESPONSE=$(curl -s -X POST https://api.hetzner.cloud/v1/servers \
-H "Content-Type: application/json" \
-H "Authorization: Bearer $API_TOKEN" \
-d "{
\"name\": \"$SERVERNAME\",
\"server_type\": \"$SERVERTYPE\",
\"location\": \"nbg1\",
\"start_after_create\": true,
\"image\": \"debian-9\",
\"ssh_keys\": [
\"Marian\"
],
\"labels\": {\"purpose\": \"webapp\"},
\"user_data\": \"#cloud-config\nruncmd:\n - touch /cloud-init-done\n\"
}")
# Get ID:
SERVER_ID=$(echo $CREATE_RESPONSE | jq -r .server.id)
# Get IP:
SERVER_IP=$(echo $CREATE_RESPONSE | jq -r .server.public_net.ipv4.ip)
echo "Created server with ID $SERVER_ID and IP $SERVER_IP"
}
# assign_ip assigns the public IP address for 'green-spider.netzbegruenung.de'
# to the server.
function assign_ip()
{
curl -X POST -H "Content-Type: application/json" -H "Authorization: Bearer $API_TOKEN" \
https://api.hetzner.cloud/v1/floating_ips/${IP_ID}/actions/assign \
-d "{\"server\": ${SERVER_ID}}"
}
# wait_for_server waits until the new server is reachable via SSH
function wait_for_server()
{
echo -n "Waiting for the server to be reachable via SSH "
sleep 30
STATUS="255"
while [ "$STATUS" != "0" ]; do
echo -n "."
sleep 5
ssh -o StrictHostKeyChecking=no -q root@$SERVER_IP ls /cloud-init-done &> /dev/null
STATUS=$?
done
echo ""
}
get_ip
echo "webapp IP address has ID ${IP_ID}"
find_webapp_server
create_server
wait_for_server
echo "Executing remote commands..."
ssh -o StrictHostKeyChecking=no -q root@$SERVER_IP << EOF
DEBIAN_FRONTEND=noninteractive
echo ""
echo "Update package sources"
apt-get update -q
echo ""
echo "Install dependencies"
apt-get install -y curl apt-transport-https gnupg2 software-properties-common
echo ""
echo "Add docker repo key"
curl -fsSL https://download.docker.com/linux/debian/gpg | apt-key add -
echo ""
echo "Add repo"
add-apt-repository "deb [arch=amd64] https://download.docker.com/linux/debian stretch stable"
echo ""
echo "Update package sources again"
apt-get update -q
echo ""
echo "Install docker"
apt-get install -y docker-ce python-pip
pip install setuptools
pip install docker-compose
docker-compose version
mkdir /root/etc-letsencrypt
curl -s https://raw.githubusercontent.com/netzbegruenung/green-spider-webapp/proxy-api-requests/docker-compose-prod.yaml > docker-compose.yaml
docker-compose pull
curl -s https://raw.githubusercontent.com/netzbegruenung/green-spider-webapp/proxy-api-requests/config/nginx/nginx_prod.conf > nginx.conf
EOF
echo "Done with remote setup."
# Copy TLS certificate files from old to new server
scp -3 -o StrictHostKeyChecking=no -r root@$CURRENT_SERVER_IP:/letsencrypt root@$SERVER_IP:/letsencrypt
# Upload secret for database access
scp -o StrictHostKeyChecking=no secrets/green-spider-api.json root@$SERVER_IP:/root/
exit
# TODO:
# - docker-compose up
echo "Launching server"
ssh -o StrictHostKeyChecking=no root@$SERVER_IP \
docker run --name webapp -d \
-p 443:443 -p 80:8000 \
-v /root/etc-letsencrypt:/etc/letsencrypt \
$DOCKERIMAGE
# Assign the IP to the new server
assign_ip
ssh -o StrictHostKeyChecking=no root@$SERVER_IP sudo ip addr add $IP_IP dev eth0
# remove old server
if [ "$CURRENT_SERVER_ID" != "null" ]; then
echo "Deleting old webapp server with ID $CURRENT_SERVER_ID"
curl -s -X DELETE -H "Content-Type: application/json" \
-H "Authorization: Bearer $API_TOKEN" \
https://api.hetzner.cloud/v1/servers/$CURRENT_SERVER_ID
fi