Updates to allow Bigboot to decrement from the default target size, down to a minimum threshold of 1GB

.gitignore

@@ -11,3 +11,4 @@ collections/ansible_collections/rhc*
 roles/autofsck
 roles/verified_reboot
 *.bak
+tasks/check_space_fallback_local.yml

ansible.cfg

@@ -14,6 +14,7 @@ timeout                 = 30
 host_key_checking       = false
 display_skipped_hosts   = false
 deprecation_warnings    = false
+show_custom_stats       = true
 
 # callback_whitelist is deprecated
 # we only include here for backwards compatibility

bigboot-wip.yml

@@ -1,27 +0,0 @@
----
-- name: Perform logical volume and boot parition resizing as needed
-  hosts: all
-  become: true
-  gather_facts: true
-  strategy: free
-
-  vars_files:
-    - bigboot_vars.yml
-
-  tasks:
-    - name: Cleanup from any previous executions
-      ansible.builtin.import_tasks: tasks/cleanup.yml
-
-    - name: Shrink the logical volume to support /boot expansion
-      ansible.builtin.import_role:
-        name: infra.lvm_snapshots.shrink_lv
-      vars:
-        shrink_lv_devices:
-          - device: "/dev/mapper/system-root"
-            size: "53687091200"
-
-    - name: Expand the /boot partition as requested
-      ansible.builtin.import_role:
-        name: infra.lvm_snapshots.bigboot
-      vars:
-        bigboot_partition_size: "{{ bigboot_size_target }}"

bigboot_execute_resize.yml

@@ -56,7 +56,7 @@
           ansible.builtin.import_role:
             name: infra.lvm_snapshots.bigboot
           vars:
-            bigboot_partition_size: "{{ bigboot_size_target }}"
+            bigboot_partition_size: "{{ bigboot_data[inventory_hostname]['bigboot_size_target'] }}"
 
         - name: Failure on request
           ansible.builtin.fail:

bigboot_setup_environment.yml

@@ -30,6 +30,7 @@
                 'bigboot_adjacent_lvm_device': bigboot_adjacent_lvm_device,
                 'bigboot_lv_shrink_size': bigboot_lv_shrink_size | int,
                 'bigboot_pv': bigboot_pv,
+                'bigboot_size_target': bigboot_size_target | int,
                 'ip_addresses': ansible_all_ipv4_addresses,
                 'server_hostname': ansible_hostname
               }

tasks/capture_lv_device_details.yml

@@ -42,15 +42,25 @@
     bigboot_lv_info: "{{ ansible_facts.mounts \
       | selectattr('device', 'equalto', bigboot_adjacent_lvm_device) | first }}"
 
-- name: Assert that there is space on the logical volume for shrinkage
+# - name: Assert that there is space on the logical volume for shrinkage
-  ansible.builtin.assert:
+#   ansible.builtin.assert:
-    that: bigboot_lv_info.size_available > bigboot_expansion_diff | int
+#     that: bigboot_lv_info.size_available > bigboot_expansion_diff | int
-    fail_msg: There is not enough space available for LV shrinking.
+#     fail_msg: There is not enough space available for LV shrinking.
+
+- name: Check for available space and fallback if needed
+  ansible.builtin.import_tasks: check_space_fallback.yml
 
 - name: Capture shrink size for logical volume
   ansible.builtin.set_fact:
     bigboot_lv_shrink_size: "{{ bigboot_lv_info.size_total - bigboot_expansion_diff | int }}"
 
+- name: Debug bigboot_lv_shrink_size
+  ansible.builtin.debug:
+    msg: "{{ bigboot_lv_shrink_size | int | human_readable(unit='M') }}"
+
+- name: Kill the play
+  ansible.builtin.meta: end_host
+
 - name: Capture logical volume name
   ansible.builtin.shell:
     cmd: |

tasks/check_space_fallback.yml

@@ -0,0 +1,26 @@
+---
+- name: Fail if /boot can't expand to at least 1GB
+  ansible.builtin.assert:
+    that: bigboot_size_target | human_to_bytes > 1073741824
+    fail_msg: "{{ bigboot_size_target | int | human_readable(unit='M') }} is less than the minimum of 1GB for /boot"
+
+- name: Verify available space and re-check if needed
+  block:
+    - name: Assert that there is space on the logical volume for shrinkage
+      ansible.builtin.assert:
+        that: bigboot_lv_info['size_available'] > bigboot_expansion_diff | int
+        fail_msg: There is not enough space available for LV shrinking.
+
+  rescue:
+    - name: Decrement size target by .25G
+      ansible.builtin.set_fact:
+        bigboot_size_target: "{{ bigboot_size_target | human_to_bytes - 262144000 }}"
+
+    - name: Update required expansion space
+      ansible.builtin.set_fact:
+        bigboot_expansion_diff:
+          "{{ bigboot_size_target | human_to_bytes - bigboot_boot_partsize | human_to_bytes }}"
+
+    - name: Re-check disk space - RESCUE
+      ansible.builtin.include_tasks: check_space_fallback.yml
+

vars/bigboot_vars.yml

@@ -1,7 +1,7 @@
 ---
 ansible_ssh_retries: 10
 
-bigboot_size_target: 1G
+bigboot_size_target: 2G
 
 # Filename of disabled services log:
 bigboot_disabled_services_log: /var/IPE/IPU/el7to8/bigboot_disabled_services.log