add kubernetes cluster addon: node-feature-discovery

3 files changed, 225 insertions, 0 deletions

diff --git a/roles/kubernetes/addons/node-feature-discovery/tasks/main.yml b/roles/kubernetes/addons/node-feature-discovery/tasks/main.yml
new file mode 100644
index 00000000..80acb7b9
--- /dev/null
+++ b/roles/kubernetes/addons/node-feature-discovery/tasks/main.yml
@@ -0,0 +1,45 @@
+---
+- name: create base directory for node-feature-discovery addon
+  run_once: true
+  delegate_to: "{{ groups['_kubernetes_primary_controlplane_node_'] | first }}"
+  file:
+    path: /etc/kubernetes/addons/node-feature-discovery
+    state: directory
+
+- name: install python-cryptoraphy
+  apt:
+    name: "{{ python_basename }}-cryptography"
+    state: present
+
+- name: generate certificate authority and master certificate
+  run_once: true
+  delegate_to: "{{ groups['_kubernetes_primary_controlplane_node_'] | first }}"
+  import_tasks: tls-ca-master.yml
+
+- name: generate certificate
+  import_tasks: tls-worker.yml
+
+- name: deploy node-feature-discovery addon
+  run_once: true
+  delegate_to: "{{ groups['_kubernetes_primary_controlplane_node_'] | first }}"
+  block:
+  - name: copy config for node-feature-discovery
+    template:
+      src: "config.{{ kubernetes_node_feature_discovery_version }}.yml.j2"
+      dest: /etc/kubernetes/addons/node-feature-discovery/config.yml
+
+  - name: generate kustomization file
+    template:
+      src: "kustomization.yml.j2"
+      dest: /etc/kubernetes/addons/node-feature-discovery/kustomization.yml
+
+  - name: check if node-feature-discovery is already installed
+    check_mode: no
+    command: kubectl --kubeconfig /etc/kubernetes/admin.conf diff -k /etc/kubernetes/addons/node-feature-discovery/
+    failed_when: false
+    changed_when: false
+    register: kube_node_feature_discovery_diff_result
+
+  - name: install node-feature-discovery onto the cluster
+    when: kube_node_feature_discovery_diff_result.rc != 0
+    command: kubectl --kubeconfig /etc/kubernetes/admin.conf apply -k /etc/kubernetes/addons/node-feature-discovery/
diff --git a/roles/kubernetes/addons/node-feature-discovery/tasks/tls-ca-master.yml b/roles/kubernetes/addons/node-feature-discovery/tasks/tls-ca-master.yml
new file mode 100644
index 00000000..a433ab32
--- /dev/null
+++ b/roles/kubernetes/addons/node-feature-discovery/tasks/tls-ca-master.yml
@@ -0,0 +1,101 @@
+---
+- name: create CA directory
+  file:
+    path: /etc/kubernetes/addons/node-feature-discovery/ca
+    state: directory
+    owner: root
+    group: root
+    mode: 0700
+
+- name: create CA private key
+  openssl_privatekey:
+    path: /etc/kubernetes/addons/node-feature-discovery/ca/key.pem
+    type: RSA
+    size: 4096
+    owner: root
+    group: root
+    mode: 0600
+
+- name: create signing request for CA certificate
+  openssl_csr:
+    path: /etc/kubernetes/addons/node-feature-discovery/ca/csr.pem
+    privatekey_path: /etc/kubernetes/addons/node-feature-discovery/ca/key.pem
+    CN: "CA for kubernetes cluster addon node-feature discovery"
+    useCommonNameForSAN: no
+    key_usage:
+    - cRLSign
+    - 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/kubernetes/addons/node-feature-discovery/ca/crt.pem
+    csr_path: /etc/kubernetes/addons/node-feature-discovery/ca/csr.pem
+    privatekey_path: /etc/kubernetes/addons/node-feature-discovery/ca/key.pem
+    provider: selfsigned
+    selfsigned_digest: sha256
+    selfsigned_not_after: "+18250d" ## 50 years
+    selfsigned_create_subject_key_identifier: always_create
+
+- name: slurp CA certificate for worker to use
+  slurp:
+    src: /etc/kubernetes/addons/node-feature-discovery/ca/crt.pem
+  register: node_feature_discovery_ca_certificate
+
+
+- name: create private key for master certificate
+  openssl_privatekey:
+    path: /etc/kubernetes/addons/node-feature-discovery/ca/master.key
+    type: RSA
+    size: 4096
+    owner: root
+    group: root
+    mode: 0600
+
+- name: create signing request for master certificate
+  openssl_csr:
+    path: /etc/kubernetes/addons/node-feature-discovery/ca/master.csr
+    privatekey_path: /etc/kubernetes/addons/node-feature-discovery/ca/master.key
+    CN: nfd-master
+    subject_alt_name:
+    - "DNS:nfd-master"
+    - "DNS:nfd-master.node-feature-discovery.svc.{{ kubernetes.dns_domain | default('cluster.local') }}"
+    - "DNS:localhost"
+    key_usage:
+    - digitalSignature
+    key_usage_critical: yes
+    extended_key_usage:
+    - serverAuth
+    - clientAuth ## this cert is also used for health checks
+    extended_key_usage_critical: yes
+    basic_constraints:
+    - 'CA:FALSE'
+    basic_constraints_critical: yes
+
+- name: check if master certificate exists
+  stat:
+    path: /etc/kubernetes/addons/node-feature-discovery/ca/master.crt
+  register: node_feature_discovery_master_certificate_stat
+
+- name: check master certificate validity
+  when: node_feature_discovery_master_certificate_stat.stat.exists
+  openssl_certificate_info:
+    path: /etc/kubernetes/addons/node-feature-discovery/ca/master.crt
+    valid_at:
+      ten_years: '+3650d'
+  register: node_feature_discovery_master_certificate_info
+
+- name: create master certificate
+  openssl_certificate:
+    path: /etc/kubernetes/addons/node-feature-discovery/ca/master.crt
+    csr_path: /etc/kubernetes/addons/node-feature-discovery/ca/master.csr
+    provider: ownca
+    ownca_path: /etc/kubernetes/addons/node-feature-discovery/ca/crt.pem
+    ownca_privatekey_path: /etc/kubernetes/addons/node-feature-discovery/ca/key.pem
+    ownca_digest: sha256
+    ownca_not_after: "+18250d" ## 50 years
+    force: "{{ node_feature_discovery_master_certificate_stat.stat.exists and (not node_feature_discovery_master_certificate_info.valid_at.ten_years) }}"
diff --git a/roles/kubernetes/addons/node-feature-discovery/tasks/tls-worker.yml b/roles/kubernetes/addons/node-feature-discovery/tasks/tls-worker.yml
new file mode 100644
index 00000000..888c0872
--- /dev/null
+++ b/roles/kubernetes/addons/node-feature-discovery/tasks/tls-worker.yml
@@ -0,0 +1,79 @@
+---
+- name: create certs directory for nfd-worker
+  file:
+    path: /etc/kubernetes/node-feature-discovery/certs
+    state: directory
+    owner: nobody
+    group: root
+    mode: 0500
+
+- name: install CA certificate
+  copy:
+    content: "{{ node_feature_discovery_ca_certificate.content | b64decode }}"
+    dest: /etc/kubernetes/node-feature-discovery/certs/ca.crt
+
+- name: create private key for worker certificate
+  openssl_privatekey:
+    path: /etc/kubernetes/node-feature-discovery/certs/tls.key
+    type: RSA
+    size: 4096
+    owner: nobody
+    group: root
+    mode: 0400
+
+- name: create signing request for worker certificate
+  openssl_csr:
+    path: /etc/kubernetes/node-feature-discovery/certs/tls.csr
+    privatekey_path: /etc/kubernetes/node-feature-discovery/certs/tls.key
+    CN: "{{ kubernetes_node_name }}"
+    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: slurp CSR for worker certificate
+  slurp:
+    src: /etc/kubernetes/node-feature-discovery/certs/tls.csr
+  register: node_feature_discovery_worker_csr
+
+- name: check if worker certificate already exists
+  stat:
+    path: /etc/kubernetes/node-feature-discovery/certs/tls.crt
+  register: node_feature_discovery_worker_certificate_stat
+
+- name: read worker certificate validity
+  when: node_feature_discovery_worker_certificate_stat.stat.exists
+  openssl_certificate_info:
+    path: /etc/kubernetes/node-feature-discovery/certs/tls.crt
+    valid_at:
+      ten_years: '+3650d'
+  register: node_feature_discovery_worker_certificate_info
+
+- name: slurp existing worker certificate
+  when: node_feature_discovery_worker_certificate_stat.stat.exists
+  slurp:
+    src: /etc/kubernetes/node-feature-discovery/certs/tls.crt
+  register: node_feature_discovery_worker_certificate_current
+
+- name: generate worker certificate
+  delegate_to: "{{ groups['_kubernetes_primary_controlplane_node_'] | first }}"
+  community.crypto.x509_certificate_pipe:
+    content: "{{ node_feature_discovery_worker_certificate_current.content | default('') | b64decode }}"
+    csr_content: "{{ node_feature_discovery_worker_csr.content | b64decode }}"
+    provider: ownca
+    ownca_path: /etc/kubernetes/addons/node-feature-discovery/ca/crt.pem
+    ownca_privatekey_path: /etc/kubernetes/addons/node-feature-discovery/ca/key.pem
+    ownca_digest: sha256
+    ownca_not_after: "+18250d" ## 50 years
+    force: "{{ node_feature_discovery_worker_certificate_stat.stat.exists and (not node_feature_discovery_worker_certificate_info.valid_at.ten_years) }}"
+  register: node_feature_discovery_worker_cert
+
+- name: store worker certificate
+  copy:
+    content: "{{ node_feature_discovery_worker_cert.certificate }}"
+    dest: /etc/kubernetes/node-feature-discovery/certs/tls.crt