Description of Issue/Question

How to deploy /dev/sdb ,/dev/sdc only use /dev/nvme0n1 as db device ?
or I just want to use a single NVME device as the db device

In addition, drive groups always look for system disks /dev/sda. Can you design to ignore a particular disk?

2 hdds
Vendor: VMware
Model: VMware Virtual S
Size: 10GB

3 NVMES:
Vendor: VMware
Model: VMware Virtual NVMe Disk
Size: 20GB

lsblk NAME            MAJ:MIN RM  SIZE RO TYPE MOUNTPOINTsda               8:0    0   20G  0 disk ├─sda1            8:1    0    1G  0 part /boot└─sda2            8:2    0   19G  0 part   ├─vgoo-lvswap 254:0    0    2G  0 lvm  [SWAP]  └─vgoo-lvroot 254:1    0   17G  0 lvm  /sdb               8:16   0   10G  0 disk sdc               8:32   0   10G  0 disk sr0              11:0    1 1024M  0 rom  nvme0n1         259:0    0   20G  0 disk   <===== only this as db_devicenvme0n2         259:1    0   20G  0 disk   nvme0n3         259:2    0   20G  0 disk

Setup

(Please provide relevant configs and/or SLS files (Be sure to remove sensitive info).)

cat /srv/salt/ceph/configuration/files/drive_groups.ymldrive_group_hdd_nvme:  target: 'I@roles:storage'  data_devices:    rotational: 1  db_devices:    rotational: 0  block_db_size: '2G'

disks report show me , use two nvme disk ,

salt-run disks.report  node003.example.com:      |_        - 2        - usage: ceph-volume lvm batch [-h] [--db-devices [DB_DEVICES [DB_DEVICES ...]]]                                       [--wal-devices [WAL_DEVICES [WAL_DEVICES ...]]]                                       [--journal-devices [JOURNAL_DEVICES [JOURNAL_DEVICES ...]]]                                       [--no-auto] [--bluestore] [--filestore]                                       [--report] [--yes] [--format {json,pretty}]                                       [--dmcrypt]                                       [--crush-device-class CRUSH_DEVICE_CLASS]                                       [--no-systemd]                                       [--osds-per-device OSDS_PER_DEVICE]                                       [--block-db-size BLOCK_DB_SIZE]                                       [--block-wal-size BLOCK_WAL_SIZE]                                       [--journal-size JOURNAL_SIZE] [--prepare]                                       [--osd-ids [OSD_IDS [OSD_IDS ...]]]                                       [DEVICES [DEVICES ...]]          ceph-volume lvm batch: error: GPT headers found, they must be removed on: /dev/sda      |_        - 0        -           Total OSDs: 1                    Solid State VG:            Targets:   block.db                  Total size: 19.00 GB                             Total LVs: 1                         Size per LV: 1.86 GB                              Devices:   /dev/nvme0n2                      Type            Path                                                    LV Size         % of device          ----------------------------------------------------------------------------------------------------            [data]          /dev/sdb                                                9.00 GB         100.0%            [block.db]      vg: vg/lv                                               1.86 GB         10%      |_        - 0        -           Total OSDs: 1                    Solid State VG:            Targets:   block.db                  Total size: 19.00 GB                             Total LVs: 1                         Size per LV: 1.86 GB                              Devices:   /dev/nvme0n3                      Type            Path                                                    LV Size         % of device          ----------------------------------------------------------------------------------------------------            [data]          /dev/sdc                                                9.00 GB         100.0%            [block.db]      vg: vg/lv                                               1.86 GB         10%-----------------------------------------------------------------------------------------

cat /srv/salt/ceph/configuration/files/drive_groups.yml    drive_group_hdd_nvme:  target: 'I@roles:storage'  data_devices:    rotational: 1              db_devices:    rotational: 0         limit: 1      <==== use limit  block_db_size: '2G'  osds_per_device: 1

salt-run disks.report  node002.example.com:      |_        - 2        - usage: ceph-volume lvm batch [-h] [--db-devices [DB_DEVICES [DB_DEVICES ...]]]                                       [--wal-devices [WAL_DEVICES [WAL_DEVICES ...]]]                                       [--journal-devices [JOURNAL_DEVICES [JOURNAL_DEVICES ...]]]                                       [--no-auto] [--bluestore] [--filestore]                                       [--report] [--yes] [--format {json,pretty}]                                       [--dmcrypt]                                       [--crush-device-class CRUSH_DEVICE_CLASS]                                       [--no-systemd]                                       [--osds-per-device OSDS_PER_DEVICE]                                       [--block-db-size BLOCK_DB_SIZE]                                       [--block-wal-size BLOCK_WAL_SIZE]                                       [--journal-size JOURNAL_SIZE] [--prepare]                                       [--osd-ids [OSD_IDS [OSD_IDS ...]]]                                       [DEVICES [DEVICES ...]]          ceph-volume lvm batch: error: GPT headers found, they must be removed on: /dev/sda  node003.example.com:      |_        - 2        - usage: ceph-volume lvm batch [-h] [--db-devices [DB_DEVICES [DB_DEVICES ...]]]                                       [--wal-devices [WAL_DEVICES [WAL_DEVICES ...]]]                                       [--journal-devices [JOURNAL_DEVICES [JOURNAL_DEVICES ...]]]                                       [--no-auto] [--bluestore] [--filestore]                                       [--report] [--yes] [--format {json,pretty}]                                       [--dmcrypt]                                       [--crush-device-class CRUSH_DEVICE_CLASS]                                       [--no-systemd]                                       [--osds-per-device OSDS_PER_DEVICE]                                       [--block-db-size BLOCK_DB_SIZE]                                       [--block-wal-size BLOCK_WAL_SIZE]                                       [--journal-size JOURNAL_SIZE] [--prepare]                                       [--osd-ids [OSD_IDS [OSD_IDS ...]]]                                       [DEVICES [DEVICES ...]]          ceph-volume lvm batch: error: GPT headers found, they must be removed on: /dev/sdaadmin:~ #

Versions Report

(Provided by running:

`salt-run deepsea.version`  0.9.23+git.0.6a24f24a0

rpm -qi salt-minion

 rpm -qi salt-minionName        : salt-minionVersion     : 2019.2.0Release     : 6.3.5Architecture: x86_64Install Date: Fri Sep 20 09:14:33 2019Group       : System/ManagementSize        : 41019License     : Apache-2.0Signature   : RSA/SHA256, Tue May 28 23:28:21 2019, Key ID 70af9e8139db7c82Source RPM  : salt-2019.2.0-6.3.5.src.rpmBuild Date  : Tue May 28 23:24:20 2019Build Host  : sheep28Relocations : (not relocatable)Packager    : https://www.suse.com/Vendor      : SUSE LLC URL         : http://saltstack.org/Summary     : The client component for SaltstackDescription :Salt minion is queried and controlled from the master.Listens to the salt master and execute the commands.Distribution: SUSE Linux Enterprise 15

rpm -qi salt-master

 rpm -qi salt-masterName        : salt-masterVersion     : 2019.2.0Release     : 6.3.5Architecture: x86_64Install Date: Fri Sep 20 09:14:34 2019Group       : System/ManagementSize        : 2936818License     : Apache-2.0Signature   : RSA/SHA256, Tue May 28 23:28:21 2019, Key ID 70af9e8139db7c82Source RPM  : salt-2019.2.0-6.3.5.src.rpmBuild Date  : Tue May 28 23:24:20 2019Build Host  : sheep28Relocations : (not relocatable)Packager    : https://www.suse.com/Vendor      : SUSE LLC URL         : http://saltstack.org/Summary     : The management component of Saltstack with zmq protocol supportedDescription :The Salt master is the central server to which all minions connect.Enabled commands to remote systems to be called in parallel ratherthan serially.Distribution: SUSE Linux Enterprise 15)