add support for multi-users

defaults/main.yml

@@ -6,6 +6,12 @@ yq:
   version: v4.31.2
   binary: yq_linux_amd64
 # --------------------------------------
+# -- kubectl version
+# --------------------------------------
+kubectl:
+  version: v1.26.6
+  arch: amd64
+# --------------------------------------
 # -- Path to k8s admin config
 # --------------------------------------
 k8s_config_path: /etc/kubernetes/admin.conf
@@ -44,7 +50,16 @@ role_type: ClusterRole
 # -- https://kubernetes.io/docs/reference/access-authn-authz/rbac/
 # --------------------------------------
 role: cluster-admin
-  
+# --------------------------------------
+# users:
+#   - username: "admin"
+#     cluster: "microk8s-cluster"
+#     certificate_expires_in: 500
+#     binding_type: ClusterRoleBinding
+#     role_type: ClusterRole
+#     role: cluster-admin
+# --------------------------------------
+users: []
 # --------------------------------------
 # -- Use with microk8s
 # --------------------------------------

handlers/main.yml

@@ -2,4 +2,4 @@
 - name: remove certificates
   file:
     state: absent
-    path: "{{ working_dir }}"
+    path: "{{ cert_dir }}"

tasks/create-user.yaml

@@ -0,0 +1,99 @@
+---
+- name: Prepare cert directory
+  block:
+    - name: Set workdir as fact
+      set_fact:
+        cert_dir: "{{ working_dir }}/.certs/{{ username }}"
+
+    - name: Create a directory if it does not exist
+      ansible.builtin.file:
+        path: "{{ cert_dir }}"
+        state: directory
+        mode: "0775"
+- block:
+  - name: Generate openssl certificate
+    tags: openssl
+    block:
+      - name: Generate an OpenSSL private key
+        community.crypto.openssl_privatekey:
+          path: "{{ cert_dir }}/{{ username }}.key"
+          size: 2048
+
+      - name: Generate an OpenSSL Certificate Signing Request
+        community.crypto.openssl_csr:
+          path: "{{ cert_dir }}/{{ username }}.csr"
+          privatekey_path: "{{ cert_dir }}/{{ username }}.key"
+          common_name: "{{ username }}"
+
+      - name: Generate an OpenSSL certificate signed with your own CA certificate
+        become: true
+        community.crypto.x509_certificate:
+          path: "{{ cert_dir }}/{{ username }}.crt"
+          csr_path: "{{ cert_dir }}/{{ username }}.csr"
+          ownca_path: "{{ k8s_cert_path }}/{{ k8s_cert_crt_file }}"
+          ownca_privatekey_path: "{{ k8s_cert_path }}/{{ k8s_cert_key_file }}"
+          provider: ownca
+          entrust_not_after: "+{{ certificate_expires_in }}d"
+
+  - name: Add user to cluster
+    block:
+      # --------------------------------------
+      # -- Get k8s server from admin.conf
+      # --------------------------------------
+      - name: Get k8s server
+        shell: yq e '.clusters[0] | select(.name == "{{ cluster }}").cluster.server' "{{ k8s_config_path }}"
+        register: kubernetes_server_output
+      # --------------------------------------
+      # -- Get k8s certificate authority data
+      # -- from admin-conf
+      # --------------------------------------
+      - name: Get k8s certificate authority data
+        shell: yq e '.clusters[0] | select(.name == "{{ cluster }}").cluster.certificate-authority-data' "{{ k8s_config_path }}"
+        register: kubernetes_cad_output
+
+      - name: Get user cert data
+        shell: cat "{{ cert_dir }}/{{ username }}.crt" | base64 -w 0
+        register: user_cert_data_output
+
+      - name: Get user key data
+        shell: cat "{{ cert_dir }}/{{ username }}.key" | base64 -w 0
+        register: user_key_data_output
+
+      - name: Set variables for template
+        set_fact:
+          kubernetes_server: "{{ kubernetes_server | default(kubernetes_server_output.stdout) }}"
+          kubernetes_cad: "{{ kubernetes_cad_output.stdout }}"
+          user_cert_data: " {{ user_cert_data_output.stdout }}"
+          user_key_data: " {{ user_key_data_output.stdout }}"
+
+      - name: Create k8s user
+        ansible.builtin.shell: |
+          kubectl config set-credentials  "{{ username }}"\
+            --client-certificate="{{ cert_dir }}/{{ username }}.crt" \
+            --client-key="{{ cert_dir }}/{{ username }}.key"
+        notify: remove certificates
+
+      - name: Set user context
+        ansible.builtin.shell: |
+          kubectl config set-context "{{ username }}@{{ cluster }}" \
+            --cluster={{ cluster }} --user="{{ username }}"
+
+      - name: Create config file from template
+        template:
+          src: config.j2
+          dest: "{{ working_dir }}/{{ username }}.config"
+          force: false
+    tags: config
+
+  - name: Bind user to role
+    block:
+      - name: Generate role binding yaml
+        template:
+          src: role-binding.j2
+          dest: "{{ cert_dir }}/{{ username }}.yaml"
+
+      - name: Apply role binding manifest
+        environment:
+          KUBECONFIG: "{{ k8s_config_path }}"
+        shell: kubectl apply -f "{{ cert_dir }}/{{ username }}.yaml"
+    tags: add_user

tasks/main.yml

@@ -7,18 +7,6 @@
 # -- 4. Remove certificates (Optional)
 # --------------------------------------
 ---
-- name: Prepare working directory
-  block:
-    - name: Set workdir as fact
-      set_fact:
-        working_dir: "{{ working_dir }}/.certs/{{ username }}"
-
-    - name: Create a directory if it does not exist
-      ansible.builtin.file:
-        path: "{{ working_dir }}"
-        state: directory
-        mode: "0775"
-
 - name: Ensure required packages are installed
   tags: packages
   block:
@@ -26,13 +14,13 @@
   # -- Prepare kubectl repo
   # -------------------------
     - name: Add an apt signing key for Kubernetes
-      become: yes
+      become: true
       apt_key:
         url: https://packages.cloud.google.com/apt/doc/apt-key.gpg
         state: present
 
     - name: Adding apt repository for Kubernetes
-      become: yes
+      become: true
       apt_repository:
         repo: deb https://apt.kubernetes.io/ kubernetes-xenial main
         state: present
@@ -42,110 +30,55 @@
     # -- Install yq
     # --------------------------------------
     - name: Ensure yq is installed
-      become: yes
+      become: true
       get_url:
         url: "https://github.com/mikefarah/yq/releases/download/{{ yq.version }}/{{ yq.binary }}"
         dest: /usr/bin/yq
         mode: "0777"
 
-    - name: Ensure kubectl and openssl are installed
+    - block:
-      become: yes
+      - name: Download kubectl release
+        uri:
+          url: https://dl.k8s.io/release/{{ kubectl.version }}/bin/linux/{{ kubectl.arch }}/kubectl
+          dest: /tmp
+
+      - name: Download the kubectl checksum file
+        uri:
+          url: https://dl.k8s.io/{{ kubectl.version }}/bin/linux/{{ kubectl.arch }}/kubectl.sha256
+          dest: /tmp
+
+      - name: Validate the kubectl binary against the checksum file
+        shell: echo "$(cat /tmp/kubectl.sha256)  /tmp/kubectl" | sha256sum --check
+        register: result
+
+      - name: Assert that the kubectl binary is OK
+        vars:
+          expected: "/tmp/kubectl: OK"
+        assert:
+          that:
+            - result.stdout == expected
+          fail_msg: "{{ result.stdout }}"
+          success_msg: "{{ result.stdout }}"
+
+    - name: Ensure openssl is installed
+      become: true
       package:
-        name: "{{ packages }}"
+        name: "openssl"
         state: present
-      vars: 
-        packages:
-          - kubectl
-          - openssl
 
-- name: Generate openssl certificate
+    - name: Create a directory if it does not exist
-  tags: openssl
+      ansible.builtin.file:
-  block:
+        path: "{{ working_dir }}"
-    - name: Generate an OpenSSL private key
+        state: directory
-      community.crypto.openssl_privatekey:
+        mode: "0775"
-        path: "{{ working_dir }}/{{ username }}.key"
-        size: 2048
 
-    - name: Generate an OpenSSL Certificate Signing Request
+- name: Create kubernetes user
-      community.crypto.openssl_csr:
+  loop: "{{ users }}"
-        path: "{{ working_dir }}/{{ username }}.csr"
+  include_tasks: create-user.yaml
-        privatekey_path: "{{ working_dir }}/{{ username }}.key"
+  vars:
-        common_name: "{{ username }}"
+    certificate_expires_in: "{{ item.certificate_expires_in | default('500') }}"
-
+    username: "{{ item.username }}"
-    - name: Generate an OpenSSL certificate signed with your own CA certificate
+    cluster: "{{ item.cluster }}"
-      become: yes
+    binding_type: "{{ item.binding_type | default('ClusterRoleBinding') }}"
-      community.crypto.x509_certificate:
+    role_type: "{{ item.role_type | default('ClusterRole') }}"
-        path: "{{ working_dir }}/{{ username }}.crt"
+    role: "{{ item.role | default('cluster-admin') }}"
-        csr_path: "{{ working_dir }}/{{ username }}.csr"
-        ownca_path: "{{ k8s_cert_path }}/{{ k8s_cert_crt_file }}"
-        ownca_privatekey_path: "{{ k8s_cert_path }}/{{ k8s_cert_key_file }}"
-        provider: ownca
-        entrust_not_after: "+{{ certificate_expires_in }}d"
-
-- name: Add user to cluster
-  block:
-    # --------------------------------------
-    # -- Get k8s server from admin.conf
-    # --------------------------------------
-    - name: Get k8s server
-      shell: yq e '.clusters[0] | select(.name == "{{ cluster }}").cluster.server' "{{ k8s_config_path }}"
-      register: kubernetes_server_output
-    # --------------------------------------
-    # -- Get k8s certificate authority data
-    # -- from admin-conf
-    # --------------------------------------
-    - name: Get k8s certificate authority data
-      shell: yq e '.clusters[0] | select(.name == "{{ cluster }}").cluster.certificate-authority-data' "{{ k8s_config_path }}"
-      register: kubernetes_cad_output
-
-    - name: Get user cert data
-      shell: cat "{{ working_dir }}/{{ username }}.crt" | base64 -w 0
-      register: user_cert_data_output
-
-    - name: Get user key data
-      shell: cat "{{ working_dir }}/{{ username }}.key" | base64 -w 0
-      register: user_key_data_output
-
-    - name: Set variables for template
-      set_fact:
-        kubernetes_server: "{{ kubernetes_server_output.stdout }}"
-        kubernetes_cad: "{{ kubernetes_cad_output.stdout }}"
-        user_cert_data: " {{ user_cert_data_output.stdout }}"
-        user_key_data: " {{ user_key_data_output.stdout }}"
-
-    - name: Create k8s user
-      ansible.builtin.shell: |
-        kubectl config set-credentials  "{{ username }}"\
-          --client-certificate="{{ working_dir }}/{{ username }}.crt" \
-          --client-key="{{ working_dir }}/{{ username }}.key"
-      notify: remove certificates
-
-    - name: Set user context
-      ansible.builtin.shell: |
-        kubectl config set-context "{{ username }}@{{ cluster }}" \
-          --cluster={{ cluster }} --user="{{ username }}"
-
-    - name: Create config file from template
-      template:
-        src: config.j2
-        dest: "{{ working_dir }}/config"
-
-    - name: Storing config on the local machine
-      ansible.builtin.fetch:
-        src: "{{ working_dir }}/config"
-        dest: ./
-        flat: yes
-  tags: config
-
-- name: Bind user to role
-  block:
-    - name: Generate role binding yaml
-      template:
-        src: role-binding.j2
-        dest: "{{ working_dir }}/{{ username }}.yaml"
-
-    - name: Apply role binding manifest
-      environment:
-        KUBECONFIG: "{{ k8s_config_path }}"
-      shell: kubectl apply -f "{{ working_dir }}/{{ username }}.yaml"
-  tags: add_user

templates/config.j2

@@ -8,8 +8,8 @@ contexts:
 - context:
     cluster: {{ cluster }}
     user: {{ username }}
-  name: {{ username }}@{{ cluster }}
+  name: {{ cluster }}
-current-context: {{ username }}@{{ cluster }}
+current-context: {{ cluster }}
 kind: Config
 preferences: {}
 users: