ansible-scylla-node: run nodetool upgradesstables after upgrade

ansible-scylla-node/defaults/main.yml

@@ -81,6 +81,21 @@ upgrade_break_before_verification: 90
 #  Any valid folder
 upgrade_backup_path: /root/scylla-backup
 
+# Run nodetool upgradesstables after the node is upgraded and CQL is up.
+# Rewrites SSTables to the current format (e.g. system keyspace format drifts).
+# Defaults to the upgrade type: skipped on minor upgrades, run on major upgrades.
+# Values:
+#  [default] {{ upgrade_major }}: true for major upgrades, false for minor
+#  true: always run upgradesstables after post-upgrade start
+#  false: skip upgradesstables
+upgrade_sstables: "{{ upgrade_major }}"
+
+# Max wall-clock seconds for nodetool upgradesstables (async timeout).
+# Values:
+#  [default] 36000 (10h), same order as cleanup/repair timeouts
+#  Any positive integer
+upgrade_sstables_timeout_seconds: 36000
+
 # ==============================
 # INSTALL
 # ==============================

ansible-scylla-node/tasks/upgrade/post_upgrade.yml

@@ -13,3 +13,24 @@
     port: 9042
     host: "{{ scylla_listen_address }}"
 
+- name: Wait for nodetool
+  ansible.builtin.command: nodetool status
+  register: nodetool_ready
+  until: nodetool_ready.rc == 0
+  retries: 30
+  delay: 10
+  when: upgrade_sstables | bool
+  changed_when: false
+
+- name: Upgrade SSTables to current format
+  ansible.builtin.command: nodetool upgradesstables
+  register: upgradesstables_result
+  when: upgrade_sstables | bool
+  async: "{{ upgrade_sstables_timeout_seconds | int }}"
+  poll: 30
+  changed_when: upgradesstables_result.rc == 0
+
+- name: Upgrade SSTables operation output
+  ansible.builtin.debug:
+    var: upgradesstables_result
+  when: upgrade_sstables | bool