From 103f517075df60f66172d1add0ec3042cb94dce9 Mon Sep 17 00:00:00 2001
From: Massaki Archambault <marchambault@badjware.dev>
Date: Mon, 14 Feb 2022 11:59:15 -0500
Subject: [PATCH] disable multipath for longhorn volume

---
 roles/k3s/files/multipath.conf |  6 ++++++
 roles/k3s/handlers/main.yml    |  5 +++++
 roles/k3s/tasks/main.yml       | 11 +++++++++--
 3 files changed, 20 insertions(+), 2 deletions(-)
 create mode 100644 roles/k3s/files/multipath.conf

diff --git a/roles/k3s/files/multipath.conf b/roles/k3s/files/multipath.conf
new file mode 100644
index 0000000..12d36c1
--- /dev/null
+++ b/roles/k3s/files/multipath.conf
@@ -0,0 +1,6 @@
+defaults {
+    user_friendly_names yes
+}
+blacklist {
+    devnode "^sd[a-z0-9]+"
+}
\ No newline at end of file
diff --git a/roles/k3s/handlers/main.yml b/roles/k3s/handlers/main.yml
index 0cd7f99..d4e5e68 100644
--- a/roles/k3s/handlers/main.yml
+++ b/roles/k3s/handlers/main.yml
@@ -1,2 +1,7 @@
+- name: Restart multipathd
+  service:
+    name: multipathd
+    state: restarted
+
 - name: reboot
   reboot:
\ No newline at end of file
diff --git a/roles/k3s/tasks/main.yml b/roles/k3s/tasks/main.yml
index a7f3e3c..99a3636 100644
--- a/roles/k3s/tasks/main.yml
+++ b/roles/k3s/tasks/main.yml
@@ -1,7 +1,14 @@
 - name: Install required packages
   apt:
     name:
-      - open-iscsi
-      - nfs-common
+      - open-iscsi # required by longhorn
+      - nfs-common # required for nfs support
+
+# https://longhorn.io/kb/troubleshooting-volume-with-multipath/
+- name: Disable multipath (for longhorn volumes)
+  copy:
+    src: multipath.conf
+    dest: /etc/multipath.conf
+  notify: Restart multipathd
 
 - include_tasks: '{{ platform }}.yml'