flatten the "playbooks" directory for better structure

Because of how Ansible local relative search paths work, the global
"files" and "templates" directories need to be next to the playbooks.
However its not intuitive to look into the playbooks directory to find
the files and templates for a host.
Therefore flatten the playbooks directory to get rid of this confusing
structure.

Also see:
https://docs.ansible.com/ansible/latest/playbook_guide/playbook_pathing.html#resolving-local-relative-paths

templates/chaosknoten/configs/grafana/compose.yaml.j2

@@ -0,0 +1,61 @@
+---
+services:
+
+  prometheus:
+    image: prom/prometheus
+    container_name: prometheus
+    command:
+      - '--config.file=/etc/prometheus/prometheus.yml'
+    ports:
+      - 9090:9090
+    restart: unless-stopped
+    volumes:
+      - ./configs/prometheus.yml:/etc/prometheus/prometheus.yml
+      - ./configs/prometheus_alerts.rules.yaml:/etc/prometheus/rules/alerts.rules.yaml
+      - prom_data:/prometheus
+  
+  alertmanager:
+    image: prom/alertmanager
+    container_name: alertmanager
+    command:
+      - '--config.file=/etc/alertmanager/alertmanager.yaml'
+    ports:
+      - 9093:9093
+    restart: unless-stopped
+    volumes:
+      - ./configs/alertmanager.yaml:/etc/alertmanager/alertmanager.yaml
+      - ./configs/alertmanager_alert_templates.tmpl:/etc/alertmanager/templates/alert_templates.tmpl
+      - alertmanager_data:/alertmanager
+
+  grafana:
+    image: grafana/grafana
+    container_name: grafana
+    ports:
+      - 3000:3000
+    restart: unless-stopped
+    environment:
+      - GF_SECURITY_ADMIN_USER=admin
+      - "GF_SECURITY_ADMIN_PASSWORD={{ lookup("community.general.passwordstore", "noc/vm-secrets/chaosknoten/grafana/GF_SECURITY_ADMIN_PASSWORD", create=false, missing="error") }}"
+    volumes:
+      - ./configs/grafana.ini:/etc/grafana/grafana.ini
+      - ./configs/grafana-datasource.yml:/etc/grafana/provisioning/datasources/datasource.yml
+      - graf_data:/var/lib/grafana
+
+  pve-exporter:
+    image: prompve/prometheus-pve-exporter
+    container_name: pve-exporter
+    ports:
+      - 9221:9221
+    restart: unless-stopped
+    environment:
+      - PVE_USER=grafana@pve
+      - "PVE_PASSWORD={{ lookup("community.general.passwordstore", "noc/vm-secrets/chaosknoten/grafana/prometheus-exporter", create=false, missing="error") }}"
+      - PVE_VERIFY_SSL=false
+    volumes:
+      - /dev/null:/etc/prometheus/pve.yml
+
+
+volumes:
+  graf_data: {}
+  prom_data: {}
+  alertmanager_data: {}

templates/chaosknoten/configs/grafana/docker_compose/alertmanager.yaml.j2

@@ -0,0 +1,40 @@
+# Links & References:
+# - https://prometheus.io/docs/alerting/latest/configuration/
+# - https://github.com/prometheus/alertmanager/blob/48a99764a1fc9279fc828de83e7a03ae2219abc7/doc/examples/simple.yml
+
+route:
+  group_by: ["alertname", "site", "type", "hypervisor"]
+
+  group_wait: 30s
+  group_interval: 5m
+  repeat_interval: 3h
+
+  receiver: ccchh-infrastructure-alerts
+
+
+{# Disable these for now, but might be interesting in the future.
+# Inhibition rules allow to mute a set of alerts given that another alert is
+# firing.
+# We use this to mute any warning-level notifications if the same alert is
+# already critical.
+inhibit_rules:
+  - source_matchers: [severity="critical"]
+    target_matchers: [severity="warning"]
+    # Apply inhibition if the alertname is the same.
+    # CAUTION:
+    #   If all label names listed in `equal` are missing
+    #   from both the source and target alerts,
+    #   the inhibition rule will apply!
+    equal: [alertname, cluster, service] #}
+
+templates:
+  - "/etc/alertmanager/templates/*.tmpl"
+
+receivers:
+  - name: "ccchh-infrastructure-alerts"
+    telegram_configs:
+      - send_resolved: true
+        bot_token: {{ lookup("community.general.passwordstore", "noc/vm-secrets/chaosknoten/grafana/alertmanager_telegram_bot_token", create=false, missing="error") }}
+        chat_id: -1002434372415
+        parse_mode: HTML
+        message: {{ "'{{ template \"alert-message.telegram.ccchh\" . }}'" }}

templates/chaosknoten/configs/grafana/docker_compose/grafana.ini

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+[server]
+root_url = https://grafana.hamburg.ccc.de
+
+[auth]
+disable_login_form = true
+
+# https://grafana.com/docs/grafana/latest/setup-grafana/configure-security/configure-authentication/keycloak/
+[auth.generic_oauth]
+enabled = true
+auto_login = true
+name = id.hamburg.ccc.de
+allow_sign_up = true
+client_id = grafana
+client_secret = {{ lookup("community.general.passwordstore", "noc/vm-secrets/chaosknoten/grafana/KEYCLOAK_SECRET", create=false, missing="error") }}
+scopes = openid email profile offline_access roles
+email_attribute_path = email
+login_attribute_path = username
+name_attribute_path = full_name
+auth_url = https://id.hamburg.ccc.de/realms/ccchh/protocol/openid-connect/auth
+token_url = https://id.hamburg.ccc.de/realms/ccchh/protocol/openid-connect/token
+api_url = https://id.hamburg.ccc.de/realms/ccchh/protocol/openid-connect/userinfo
+signout_redirect_url = https://id.hamburg.ccc.de/realms/ccchh/protocol/openid-connect/logout
+role_attribute_path = "contains(roles[*], 'grafanaadmin') && 'GrafanaAdmin' || contains(roles[*], 'admin') && 'Admin' || contains(roles[*], 'editor') && 'Editor' || 'Viewer'"
+allow_assign_grafana_admin = true
+use_refresh_token = true