Merge pull request #59 from netzbegruenung/add-admin-scripts
Add devops scripts
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# DevOps
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Die Scripte in diesem Verzeichnis erlauben das weitgehend automatisierte
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Provisionieren eines Servers, Ausführen von Jobs wie Spider und Screenshotter
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und Entfernen des Servers.
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**Warnung**: Die Scripte sind aktuell so einfach, dass die erzeugten Server nur nach erfolgreicher
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Ausführung des Jobs entfernt werden. Im Fall eines Fehlers muss der provisionierte
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Server unbedingt manuell entfernt werden, um unnötige Kosten zu vermeiden.
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## Voraussetzungen
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- SSH Public Key ist bei Hetzner hinterlegt und in den scripten eingetragen (siehe 'ssh_keys')
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- API Token für Hetzner in Datei 'secrets/hetzner-api-token.sh' im Format 'export API_TOKEN=<token>'
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- Service account JSON Datei mit Schreibrechten in 'secrets/datastore-writer.json'
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- curl
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- jq (https://stedolan.github.io/jq/)
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- ssh
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## Ausführung
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Die Scripte werden aus dem Root-Verzeichnis des Repositories ausgeführt.
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```
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# Spidern
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devops/run-job.sh spider
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# Screenshots erzeugen
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devops/run-job.sh screenshotter
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```
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Der Terminal muss bis zum Ende der Ausführung geöffnet bleiben.
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#!/bin/bash
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# Creates a server, installs Docker, runs the screenshots job, tears down the server.
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#
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# This will take several hours. For a complete, clean run it is required to leave the
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# terminal running the script open. Otherwise the server won't be deleted properly
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# which will result in extra cost.
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#
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# When stopping the script at any point (Ctrl+C), please make sure that the server
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# gets deleted afterwards.
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#
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# Requirements:
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#
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# - curl
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# - jq (https://stedolan.github.io/jq/)
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# - ssh
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# - SSH key referenced in the server details ("ssh_keys")
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# - Service account with write permission for Storage and Datastore in
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# secrets/datastore-writer.json
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API_TOKEN_SECRET="secrets/hetzner-api-token.sh"
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test -f $API_TOKEN_SECRET || { echo >&2 "File $API_TOKEN_SECRET does not exist."; exit 1; }
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source $API_TOKEN_SECRET
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if [[ "$1" == "" ]]; then
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echo "No argument given. Please use 'screenshotter' or 'spider' as arguments."
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exit 1
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fi
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function create_server()
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{
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echo "Creating server $1"
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# server_type 'cx11' is the smallest, cheapest category.
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# location 'nbg1' is Nürnberg/Nuremberg, Germany.
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# image 'debian-9' is a plain Debian stretch.
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# ssh_keys ['Marian'] adds Marian's public key to the server and can be extended.
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# user_data: Ensures that we can detect when the cloud-init setup is done.
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#
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CREATE_RESPONSE=$(curl -s -X POST https://api.hetzner.cloud/v1/servers \
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-H "Content-Type: application/json" \
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-H "Authorization: Bearer $API_TOKEN" \
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-d "{
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\"name\": \"$1\",
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\"server_type\": \"cx11\",
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\"location\": \"nbg1\",
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\"start_after_create\": true,
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\"image\": \"debian-9\",
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\"ssh_keys\": [
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\"Marian\"
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],
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\"user_data\": \"#cloud-config\nruncmd:\n - touch /cloud-init-done\n\"
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}")
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# Get ID:
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SERVER_ID=$(echo $CREATE_RESPONSE | jq -r .server.id)
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# Get IP:
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SERVER_IP=$(echo $CREATE_RESPONSE | jq -r .server.public_net.ipv4.ip)
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echo "Created server with ID $SERVER_ID and IP $SERVER_IP"
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}
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function wait_for_server()
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{
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echo -n "Waiting for the server to be reachable via SSH "
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sleep 30
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STATUS="255"
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while [ "$STATUS" != "0" ]; do
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echo -n "."
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sleep 5
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ssh -o StrictHostKeyChecking=no -q root@$SERVER_IP ls /cloud-init-done &> /dev/null
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STATUS=$?
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done
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echo ""
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}
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create_server $1
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wait_for_server
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echo "Executing remote commands..."
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ssh -o StrictHostKeyChecking=no -q root@$SERVER_IP << EOF
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DEBIAN_FRONTEND=noninteractive
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echo ""
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echo "Update package sources"
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apt-get update -q
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echo ""
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echo "Install dependencies"
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apt-get install -y curl apt-transport-https gnupg2 software-properties-common
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echo ""
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echo "Add docker repo key"
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curl -fsSL https://download.docker.com/linux/debian/gpg | apt-key add -
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echo ""
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echo "Add repo"
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add-apt-repository "deb [arch=amd64] https://download.docker.com/linux/debian stretch stable"
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echo ""
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echo "Update package sources again"
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apt-get update -q
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echo ""
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echo "Install docker"
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apt-get install -y docker-ce
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mkdir /root/secrets
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EOF
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echo "Done with remote setup."
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if [[ $1 == "screenshotter" ]]; then
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### screenshotter
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# Copy service account secret to server
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echo "Copying secret to /root/secrets/service-account.json"
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scp -o StrictHostKeyChecking=no -q secrets/datastore-writer.json root@$SERVER_IP:/root/secrets/service-account.json
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# Run docker job
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echo "Starting Docker Job"
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ssh -o StrictHostKeyChecking=no -q root@$SERVER_IP docker run -t \
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-v /root/secrets:/secrets \
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quay.io/netzbegruenung/green-spider-screenshotter
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else
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### spider
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# Copy service account secret to server
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echo "Copying secret to /root/secrets/datastore-writer.json"
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scp -o StrictHostKeyChecking=no -q secrets/datastore-writer.json root@$SERVER_IP:/root/secrets/datastore-writer.json
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# Run docker job
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echo "Starting Docker Job"
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ssh -o StrictHostKeyChecking=no -q root@$SERVER_IP docker run -t \
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-v /root/secrets:/secrets \
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quay.io/netzbegruenung/green-spider spider.py \
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--credentials-path /secrets/datastore-writer.json \
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jobs
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ssh -o StrictHostKeyChecking=no -q root@$SERVER_IP docker run -t \
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-v /root/secrets:/secrets \
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quay.io/netzbegruenung/green-spider spider.py \
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--credentials-path /secrets/datastore-writer.json \
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spider
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fi
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# Delete the box
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echo "Deleting server $SERVER_ID"
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curl -s -X DELETE -H "Content-Type: application/json" \
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-H "Authorization: Bearer $API_TOKEN" \
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https://api.hetzner.cloud/v1/servers/$SERVER_ID
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