initial pfannkuchen

roles/sysctl_proxmox/handlers/main.yml

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+---
+- name: sysctl reload
+  ansible.builtin.command: sysctl --system
+
+- name: resolvconf update
+  ansible.builtin.command: resolvconf -u

roles/sysctl_proxmox/tasks/main.yml

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+---
+- name: resolvconf installieren
+  ansible.builtin.apt:
+    name: resolvconf
+    state: present
+
+- name: DNS in resolvconf head setzen
+  ansible.builtin.copy:
+    dest: /etc/resolvconf/resolv.conf.d/head
+    content: |
+      # Managed by Ansible
+      nameserver 1.1.1.1
+      nameserver 1.0.0.1
+    mode: "0644"
+  notify: resolvconf update
+
+- name: /etc/hosts deployen
+  ansible.builtin.template:
+    src: hosts.j2
+    dest: /etc/hosts
+    mode: "0644"
+
+- name: sysctl.conf inkludiert sysctl.d
+  ansible.builtin.lineinfile:
+    path: /etc/sysctl.conf
+    create: true
+    mode: "0644"
+    line: "# Managed by Ansible – Drop-ins in /etc/sysctl.d/ werden automatisch geladen"
+    insertbefore: BOF
+  notify: sysctl reload
+
+- name: Sysctl Parameter setzen
+  ansible.posix.sysctl:
+    name: "{{ item.key }}"
+    value: "{{ item.value }}"
+    sysctl_file: /etc/sysctl.d/99-proxmox-tuning.conf
+    reload: true
+    state: present
+  loop:
+    - { key: vm.overcommit_memory,               value: "1" }
+    - { key: vm.swappiness,                      value: "1" }
+    - { key: fs.file-max,                        value: "9999999" }
+    - { key: fs.inotify.max_user_watches,        value: "524288" }
+    - { key: fs.inotify.max_user_instances,       value: "512" }
+    - { key: net.ipv4.ip_forward,                value: "1" }
+    - { key: net.ipv6.conf.all.forwarding,       value: "1" }
+    - { key: net.bridge.bridge-nf-call-iptables, value: "0" }
+    - { key: net.bridge.bridge-nf-call-ip6tables, value: "0" }
+    - { key: vm.dirty_expire_centisecs,          value: "3000" }
+    - { key: vm.dirty_writeback_centisecs,       value: "500" }
+    - { key: net.ipv4.tcp_mtu_probing,           value: "1" }
+    - { key: net.core.rmem_max,                  value: "67108864" }
+    - { key: net.core.wmem_max,                  value: "67108864" }
+    - { key: net.ipv4.tcp_rmem,                  value: "4096 87380 67108864" }
+    - { key: net.ipv4.tcp_wmem,                  value: "4096 65536 67108864" }

roles/sysctl_proxmox/templates/hosts.j2

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+# Managed by Ansible
+127.0.0.1 localhost
+127.0.1.1 {{ inventory_hostname }}
+::1 localhost ip6-localhost ip6-loopback
+
+# Proxmox Hosts
+{% for host in groups['proxmox'] %}
+{{ hostvars[host]['ansible_host'] }} {{ host }}
+{% endfor %}