ansible-scylla-node: auto-detect NVMe: only use non-partitioned disks.

NVMe disks should only be selected that are not in use, which should be the case when they are not partitioned.

Fixes #407

ansible-scylla-node/defaults/main.yml

@@ -190,7 +190,6 @@ scylla_dependencies:
   - curl
   - wget
   - python3-yaml # this will fail on non centos systems
-  - nvme-cli
   #- software-properties-common
   #- apt-transport-https
   #- gnupg2

ansible-scylla-node/tasks/RedHat.yml

@@ -120,11 +120,6 @@
     for i in `yum search python3|grep -i pyyaml|awk '{ print $1 }'`; do sudo yum -y install $i; done
   become: true
 
-- name: install nvme-cli
-  shell: |
-    yum install -y nvme-cli
-  become: true
-
 - name: install and configure Scylla Manager Agent
   block:
     - name: add Scylla Manager repo

ansible-scylla-node/tasks/common.yml

@@ -52,7 +52,7 @@
   block:
     - name: Get list of NVMEs
       shell: |
-        nvme list | awk '{print $1}' | tail -n +3
+        lsblk -oNAME,PTTYPE -nd | grep nvme | awk '{if ($2=="") print "/dev/"$1}'
       register: _detected_nvmes
 
     - set_fact:
@@ -80,6 +80,10 @@
           _disable_online_discard: "--online-discard {{ scylla_raid_online_discard }}"
         when: _scylla_raid_setup_help.stdout is search("--online-discard")
 
+      - name: "ansible-scylla-node: common.yml: Setting raid setup with disks"
+        debug:
+          msg: "Using the following disk devices: {{ scylla_raid_setup | join(',') }}"
+
       - name: run raid setup if there is no scylla mount yet
         shell: "scylla_raid_setup --disks {{ scylla_raid_setup | join(',') }} --update-fstab {{ _disable_online_discard }}"
         become: true