Check pub key file perms and default to pub key data

The previously default /home/stack/.ssh/id_rsa.pub file may not exist or
be readable; exit with explicit error message. Users can still specify a
file path but will need to ensure it is readable. Should a file path not
be specified, default to amp_ssh_key_data. The value is passed by THT
with the public key of the 'default' keypair from the undercloud which
anyway is the public key of the 'stack' user.

This patch also fixes a syntax error in octavia-undercloud role.

Closes-Bug: #1770153
Closes-Bug: #1770641

Depends-On: https://review.openstack.org/568022
Change-Id: I0026343d90b84572c3002fa21001cfb09c742391

playbooks/octavia-files.yaml

@@ -5,6 +5,7 @@
   vars:
     amp_ssh_key_name: "{{ amp_ssh_key_name }}"
     amp_ssh_key_path: "{{ amp_ssh_key_path }}"
+    amp_ssh_key_data: "{{ amp_ssh_key_data }}"
     auth_username: "{{ auth_username }}"
     auth_pasword: "{{ auth_password }}"
     auth_project_name: "{{ auth_project_name }}"

playbooks/roles/common/defaults/main.yml

@@ -3,7 +3,7 @@ amp_image_name: ""
 amp_image_filename: ""
 amp_image_tag: "amphora-image"
 amp_ssh_key_name: "octavia-ssh-key"
-amp_ssh_key_path: "/home/stack/.ssh/id_rsa.pub"
+amp_ssh_key_path: ""
 auth_username: "octavia"
 auth_project_name: "service"
 lb_mgmt_net_name: "lb-mgmt-net"

playbooks/roles/octavia-undercloud/tasks/main.yml

@@ -24,16 +24,39 @@
   - include_tasks: image_mgmt.yml
     when: image_file_result.stat.exists
 
-  - name: check if pub key file exists
-    stat: path="{{ amp_ssh_key_path }}"
-    register: ssh_pub_key_file_result
+  - name: use ssh pub key file if provided and is readable
+    block:
+      - name: check if pub key file exists
+        stat: path="{{ amp_ssh_key_path }}"
+        register: key_file_result
+        ignore_errors: true
+
+      - name: fail if ssh pub key file does not exist or is not readable
+        fail: msg="{{ amp_ssh_key_path }} does not exist or is not readable by user {{ ansible_user }}"
+        when: key_file_result|failed or key_file_result.stat.exists == False or key_file_result.stat.readable == False
+
+      - set_fact:
+          amp_ssh_key_path_final: "{{ amp_ssh_key_path }}"
+    when: amp_ssh_key_path is defined and amp_ssh_key_path != ""
+
+  - name: defaulting to public key from undercloud default keypair
+    block:
+      - name: create temp pub key file
+        tempfile: state=file
+        register: ssh_key_tmp_file
+
+      - name: copy ssh public key content to temp file
+        copy: content="{{ amp_ssh_key_data }}" dest="{{ ssh_key_tmp_file.path }}"
+
+      - set_fact:
+          amp_ssh_key_path_final: "{{ ssh_key_tmp_file.path }}"
+    when: amp_ssh_key_path is not defined or amp_ssh_key_path == ""
 
   - name: upload pub key to overcloud
     shell: |
       openstack keypair show {{ amp_ssh_key_name }} || \
-        openstack keypair create --public-key {{ amp_ssh_key_path }} {{ amp_ssh_key_name }}
+        openstack keypair create --public-key {{ amp_ssh_key_path_final }} {{ amp_ssh_key_name }}
     environment:
-      OS_USERNAME: {{ auth_username }}
-      OS_PASSWORD: {{ auth_password }}
-      OS_PROJECT_NAME: {{ auth_project_name }}
-    when: ssh_pub_key_file_result.stat.exists == True
+      OS_USERNAME: "{{ auth_username }}"
+      OS_PASSWORD: "{{ auth_password }}"
+      OS_PROJECT_NAME: "{{ auth_project_name }}"

releasenotes/notes/fix-octavia-pub-key-d195fbf1976a8d36.yaml

@@ -0,0 +1,3 @@
+---
+fixes:
+  - Check pub key file permissions and default to pub key data for Octavia.

releasenotes/notes/fix-syntax-error-in-octavia-undercloud-role-c02b0c5b0f1ece34.yaml

@@ -0,0 +1,3 @@
+---
+fixes:
+  - Fix syntax error in octavia-undercloud role.

workbooks/octavia_post.yaml

@@ -13,6 +13,7 @@ workflows:
       - amp_image_tag
       - amp_ssh_key_name
       - amp_ssh_key_path
+      - amp_ssh_key_data
       - auth_username
       - auth_password
       - auth_project_name
@@ -101,6 +102,7 @@ workflows:
             amp_image_tag: <% $.amp_image_tag %>
             amp_ssh_key_name: <% $.amp_ssh_key_name %>
             amp_ssh_key_path: <% $.amp_ssh_key_path %>
+            amp_ssh_key_data: <% $.amp_ssh_key_data %>
             auth_username: <% $.auth_username %>
             auth_password: <% $.auth_password %>
             auth_project_name: <% $.auth_project_name %>