From 43ec757a4cf7bc27f2156c490db67e7c38764d1b Mon Sep 17 00:00:00 2001
From: Christian Pointner <equinox@spreadspace.org>
Date: Wed, 2 Jun 2021 01:50:20 +0200
Subject: prometheus: server CA and certificates

---
 roles/monitoring/prometheus/server/tasks/main.yml |  4 +-
 roles/monitoring/prometheus/server/tasks/tls.yml  | 98 +++++++++++++++++++++++
 2 files changed, 100 insertions(+), 2 deletions(-)
 create mode 100644 roles/monitoring/prometheus/server/tasks/tls.yml

(limited to 'roles/monitoring')

diff --git a/roles/monitoring/prometheus/server/tasks/main.yml b/roles/monitoring/prometheus/server/tasks/main.yml
index 5c649f34..61660a03 100644
--- a/roles/monitoring/prometheus/server/tasks/main.yml
+++ b/roles/monitoring/prometheus/server/tasks/main.yml
@@ -47,8 +47,8 @@
     owner: prometheus
     group: prometheus
 
-## TODO:
-## - create CA and certificate/key
+- name: create TLS CA and certificates
+  import_tasks: tls.yml
 
 - name: generate configuration file
   template:
diff --git a/roles/monitoring/prometheus/server/tasks/tls.yml b/roles/monitoring/prometheus/server/tasks/tls.yml
new file mode 100644
index 00000000..f9ad5ca3
--- /dev/null
+++ b/roles/monitoring/prometheus/server/tasks/tls.yml
@@ -0,0 +1,98 @@
+---
+- name: install python-cryptoraphy
+  apt:
+    name: "{{ python_basename }}-cryptography"
+    state: present
+
+- name: create base directory
+  file:
+    path: /etc/ssl/prometheus
+    state: directory
+
+- name: create CA directory
+  file:
+    path: /etc/ssl/prometheus/ca
+    state: directory
+    owner: root
+    group: root
+    mode: 0700
+
+- name: create server cert/key directory
+  file:
+    path: /etc/ssl/prometheus/server
+    state: directory
+    owner: root
+    group: prometheus
+    mode: 0750
+
+- name: create CA private key
+  openssl_privatekey:
+    path: /etc/ssl/prometheus/ca/key.pem
+    type: RSA
+    size: 4096
+    owner: root
+    group: root
+    mode: 0600
+
+- name: create signing request for CA certificate
+  openssl_csr:
+    path: /etc/ssl/prometheus/ca/csr.pem
+    privatekey_path: /etc/ssl/prometheus/ca/key.pem
+    CN: "prometheus CA"
+    useCommonNameForSAN: no
+    key_usage:
+    - cRLSign
+    - digitalSignature
+    - keyCertSign
+    key_usage_critical: yes
+    basic_constraints:
+    - 'CA:TRUE'
+    - 'pathlen:0'
+    basic_constraints_critical: yes
+
+- name: create self-signed CA certificate
+  openssl_certificate:
+    path: /etc/ssl/prometheus/ca-crt.pem
+    csr_path: /etc/ssl/prometheus/ca/csr.pem
+    privatekey_path: /etc/ssl/prometheus/ca/key.pem
+    provider: selfsigned
+    selfsigned_digest: sha256
+    selfsigned_not_after: "+18250d" ## 50 years
+
+
+- name: create server private key to connect to exporter
+  openssl_privatekey:
+    path: /etc/ssl/prometheus/server/exporter-key.pem
+    type: RSA
+    size: 4096
+    owner: prometheus
+    group: prometheus
+    mode: 0400
+
+- name: create signing request for server certificate to connect to exporter
+  openssl_csr:
+    path: /etc/ssl/prometheus/server/exporter-csr.pem
+    privatekey_path: /etc/ssl/prometheus/server/exporter-key.pem
+    CN: "{{ inventory_hostname }}"
+    subject_alt_name:
+    - "DNS:{{ host_name }}.{{ host_domain }}"
+    - "IP:{{ ansible_default_ipv4.address }}"
+    key_usage:
+    - digitalSignature
+    key_usage_critical: yes
+    extended_key_usage:
+    - clientAuth
+    extended_key_usage_critical: yes
+    basic_constraints:
+    - 'CA:FALSE'
+    basic_constraints_critical: yes
+
+- name: create server certificate to connect to exporter
+  openssl_certificate:
+    path: /etc/ssl/prometheus/server/exporter-crt.pem
+    csr_path: /etc/ssl/prometheus/server/exporter-csr.pem
+    provider: ownca
+    ownca_path: /etc/ssl/prometheus/ca-crt.pem
+    ownca_privatekey_path: /etc/ssl/prometheus/ca/key.pem
+    ownca_digest: sha256
+    ownca_not_after: "+18250d" ## 50 years
-- 
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