Blog/content/post/14-proxmox-cluster-upgrade-8-to-9-with-ceph.md

---
slug: proxmox-cluster-upgrade-8-to-9-with-ceph
title: Template
description:
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draft: true
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---

## Intro

My **Proxmox VE** cluster is almost one year old now, and it's been a while since I didn't update my nodes. Now is the time to move forward and bump it to Proxmox VE **9**.

I'm mainly interested in the new HA affinity rules, here what this version brings:
- Debian 13 "Trixie"
- Snapshots for thick-provisioned LVM shared storage
- Fabrics feature for the SDN stack
- Better mobile interface
- Affinity rules in HA cluster

In this article, I will walk you through the upgrade steps for my Proxmox VE highly available cluster supported by **Ceph** distributed storage. The official documentation can be found [here](https://pve.proxmox.com/wiki/Upgrade_from_8_to_9).

---
## Prerequisites

Before jumping into the upgrade, let's review the prerequisites:

1. All nodes upgraded to the latest version of Proxmox VE 8.4.
2. Ceph: upgrade cluster to Ceph 19.2 Squid before.
3. Proxmox Backup Server: upgrade to Proxmox BS 4.
4. Reliable access to the node.
5. A healthy cluster.
6. backup of all VMs and CTs.
7. At least 5 GB free disk space on the root mount point.

Well, I have some homework to do before the major upgrade to Proxmox VE 9. My nodes are currently in version `8.3.2`, hence a first update is necessary.

Then my Ceph cluster, for my distributed storage, is using Ceph Reef (`18.2.4`). After the update to Proxmox VE 8.4, I'll move from Ceph Reef to Squid.

I don't use Proxmox Backup Server in my homelab for now, I can skip that point. For the access to the nodes, it is better to reach the console (not from the WebGUI). I don't have direct access, In only have SSH.

The last points are checked, all my nodes have more than 10GB on the `/` mount point.

ℹ️ One of my VM is using the host's processing unit of the APU via PCI pass-through. As this prevents the VM for hot migration, I remove the device at the beginning of this procedure to avoid having to restart the VM each time.

Also, until the end of the upgrade to Proxmox VE 9, I set the Ceph OSDs as "no out", to avoid the CRUSH algorithm to try to rebalance the Ceph cluster during the upgrade:
```bash
ceph osd set noout
```

### Update Proxmox VE to 8.4.14

The plan is simple, for all nodes, one at a time, I will:
- Enable the maintenance mode
```bash
ha-manager crm-command node-maintenance enable $(hostname)
```

- Update the node
```bash
apt-get update
apt-get dist-upgrade -y
```

At the end of the update, I'm aksed to remove a bootloader, which I execute:
```plaintext
Removable bootloader found at '/boot/efi/EFI/BOOT/BOOTX64.efi', but GRUB packages not set up to update it!
Run the following command:

echo 'grub-efi-amd64 grub2/force_efi_extra_removable boolean true' | debconf-set-selections -v -u

Then reinstall GRUB with 'apt install --reinstall grub-efi-amd64'
```

- Restart it
```bash
reboot
```

- Disable the maintenance node
```bash
ha-manager crm-command node-maintenance disable $(hostname)
```

Between each node, I wait for the Ceph status to be clean, without warnings.

✅ At the end, the Proxmox VE cluster is updated to `8.4.14`

### Upgrade Ceph from Reef to Squid

I can now move on into the Ceph upgrade, the Proxmox documentation for that topics is [here](https://pve.proxmox.com/wiki/Ceph_Reef_to_Squid).

On all nodes, I update the source of the Ceph packages for Proxmox:
```bash
sed -i 's/reef/squid/' /etc/apt/sources.list.d/ceph.list
```

I upgrade the Ceph packages:
```
apt update
apt full-upgrade -y
```

After the upgrade on the first node, the Ceph version now shows `19.2.3`, I can see my OSDs appear now outdated, the monitors need either an upgrade or a restart:
![proxmox-ceph-version-upgrade.png](img/proxmox-ceph-version-upgrade.png)

I carry on and upgrade the packages on the 2 other nodes.

I have a monitor on each node, so I have to restart the monitor, one node at a time:
```bash
systemctl restart ceph-mon.target
```

I verify the Ceph status between each restart:
```bash
ceph status
```

Once all monitors are restarted, they report the latest version, with `ceph mon dump`:
- Before: `min_mon_release 18 (reef)`
- After: `min_mon_release 19 (squid)`

Now I can restart the OSD, still one node at a time. I have one OSD per node:
```bash
systemctl restart ceph-osd.target
```

I monitor the Ceph status with the Proxmox WebGUI. At start, it is showing some fancy colors. I'm just waiting to be back to full green, it takes less than a minute:
![Pasted_image_20251102230907.png](img/Pasted_image_20251102230907.png)

A warning now shows up: `HEALTH_WARN: all OSDs are running squid or later but require_osd_release < squid`. Now all my OSDs are running Squid, I can set the minimum version to it:
```bash
ceph osd require-osd-release squid
```

ℹ️ I'm not currently using CephFS so I don't have to care about the MDS (MetaData Server) daemon.

✅ The Ceph cluster has been successfully upgraded to Squid (`19.2.3`).

---
## Checks

The prerequisites to upgrade the cluster to Proxmox VE 9 are now complete. Am I ready to upgrade? Not yet.

A small checklist program named **`pve8to9`** is included in the latest Proxmox VE 8.4 packages. The program will provide hints and warnings about potential issues before, during and after the upgrade process. Pretty handy isn't it?

Running the tool the first time give me some insights on what I need to do. The script checks a number of parameters, grouped by theme. Here the VM guest section:
```plaintext
= VIRTUAL GUEST CHECKS =

INFO: Checking for running guests..
WARN: 1 running guest(s) detected - consider migrating or stopping them.
INFO: Checking if LXCFS is running with FUSE3 library, if already upgraded..
SKIP: not yet upgraded, no need to check the FUSE library version LXCFS uses
INFO: Checking for VirtIO devices that would change their MTU...
PASS: All guest config descriptions fit in the new limit of 8 KiB
INFO: Checking container configs for deprecated lxc.cgroup entries
PASS: No legacy 'lxc.cgroup' keys found.
INFO: Checking VM configurations for outdated machine versions
PASS: All VM machine versions are recent enough
```

At the end, you have the summary. The goal is to address as many `FAILURES` and `WARNINGS` as possible:
```plaintext
= SUMMARY =

TOTAL:    57
PASSED:   43
SKIPPED:  7
WARNINGS: 2
FAILURES: 2
```

Let's review what's wrong with the current configuration:

```
FAIL: 1 custom role(s) use the to-be-dropped 'VM.Monitor' privilege and need to be adapted after the upgrade
```

Some time ago, in order to use Terraform with my Proxmox cluster, I created a dedicated role. This was detailed in that [post]({{< ref "post/3-terraform-create-vm-proxmox" >}}).

This role is using the `VM.Monitor` privilege, which is removed in Proxmox VE 9. Instead, new privileges  under `VM.GuestAgent.*` exist. So I remove this one and I'll add those once the cluster have been upgraded.

```
FAIL: systemd-boot meta-package installed. This will cause problems on upgrades of other boot-related packages. Remove 'systemd-boot' See https://pve.proxmox.com/wiki/Upgrade_from_8_to_9#sd-boot-warning for more information.
```

 Proxmox VE usually use `systemd-boot` for booting only in some configurations which are managed by `proxmox-boot-tool`, the meta-package `systemd-boot` should be removed. The package was automatically shipped for systems installed from the PVE 8.1 to PVE 8.4, as it contained `bootctl` in bookworm.

If the `pve8to9` checklist script suggests it, the `systemd-boot` meta-package is safe to remove unless you manually installed it and are using `systemd-boot` as a bootloader:
```bash
apt remove systemd-boot -y
```


```
WARN: 1 running guest(s) detected - consider migrating or stopping them.
```

In HA setup, before updating a node, I put it in maintenance mode. This automatically moves the workload elsewhere. When this mode is disabled, the workload move back to its previous location.

```
WARN: The matching CPU microcode package 'amd64-microcode' could not be found! Consider installing it to receive the latest security and bug fixes for your CPU.
        Ensure you enable the 'non-free-firmware' component in the apt sources and run:
        apt install amd64-microcode
```

It is recommended to install processor microcode for updates which can fix hardware bugs, improve performance, and enhance security features of the processor.

Add the `non-free-firmware` source to the current ones:
```bash
sed -i '/^deb /{/non-free-firmware/!s/$/ non-free-firmware/}' /etc/apt/sources.list
```

Then install the `amd64-microcode` package:
```bash
apt update
apt install amd64-microcode -y
```

After these small adjustments, am I ready yet? Let's find out by relaunching the `pve8to9` script.

⚠️ Don't forget to run the `pve8to9` on all nodes to make sure everything is good.

---
## Upgrade

🚀 Now everything is ready for the big move! Like I did for the minor update, I'll proceed one node at a time.

### Set Maintenance Mode

First, I enter the node into maintenance mode. This will move existing workload on other nodes:
```bash
ha-manager crm-command node-maintenance enable $(hostname)
```

After issuing the command, I wait about one minute to give the resources the time to migrate.

### Change Source Repositories to Trixie

Since Debian Trixie, the `deb822` format is now available and recommended for sources. It is structured around key/value format. This offers better readability and security.

#### Debian Sources
```bash
cat > /etc/apt/sources.list.d/debian.sources << EOF
Types: deb deb-src
URIs: http://deb.debian.org/debian/
Suites: trixie trixie-updates
Components: main contrib non-free-firmware
Signed-By: /usr/share/keyrings/debian-archive-keyring.gpg

Types: deb deb-src
URIs: http://security.debian.org/debian-security/
Suites: trixie-security
Components: main contrib non-free-firmware
Signed-By: /usr/share/keyrings/debian-archive-keyring.gpg
EOF
```

#### Proxmox Sources (without subscription)
```bash
cat > /etc/apt/sources.list.d/proxmox.sources << EOF
Types: deb
URIs: http://download.proxmox.com/debian/pve
Suites: trixie
Components: pve-no-subscription
Signed-By: /usr/share/keyrings/proxmox-archive-keyring.gpg
EOF
```

#### Ceph Squid Sources (without subscription)
```bash
cat > /etc/apt/sources.list.d/ceph.sources << EOF
Types: deb
URIs: http://download.proxmox.com/debian/ceph-squid
Suites: trixie
Components: no-subscription
Signed-By: /usr/share/keyrings/proxmox-archive-keyring.gpg
EOF
```

#### Remove Old `bookworm` Source Lists

The list for `bookworm` in the old format must be removed:
```bash
rm -f /etc/apt/sources.list{,.d/*.list}
```

### Update the Configured `apt` Repositories

Refresh the repositories:
```bash
apt update
```
```plaintext
Get:1 http://security.debian.org/debian-security trixie-security InRelease [43.4 kB]
Get:2 http://deb.debian.org/debian trixie InRelease [140 kB]
Get:3 http://download.proxmox.com/debian/ceph-squid trixie InRelease [2,736 B]
Get:4 http://download.proxmox.com/debian/pve trixie InRelease [2,771 B]
Get:5 http://deb.debian.org/debian trixie-updates InRelease [47.3 kB]
Get:6 http://security.debian.org/debian-security trixie-security/main Sources [91.1 kB]
Get:7 http://security.debian.org/debian-security trixie-security/non-free-firmware Sources [696 B]
Get:8 http://security.debian.org/debian-security trixie-security/main amd64 Packages [69.0 kB]
Get:9 http://security.debian.org/debian-security trixie-security/main Translation-en [45.1 kB]
Get:10 http://security.debian.org/debian-security trixie-security/non-free-firmware amd64 Packages [544 B]
Get:11 http://security.debian.org/debian-security trixie-security/non-free-firmware Translation-en [352 B]
Get:12 http://download.proxmox.com/debian/ceph-squid trixie/no-subscription amd64 Packages [33.2 kB]
Get:13 http://deb.debian.org/debian trixie/main Sources [10.5 MB]
Get:14 http://download.proxmox.com/debian/pve trixie/pve-no-subscription amd64 Packages [241 kB]
Get:15 http://deb.debian.org/debian trixie/non-free-firmware Sources [6,536 B]
Get:16 http://deb.debian.org/debian trixie/contrib Sources [52.3 kB]
Get:17 http://deb.debian.org/debian trixie/main amd64 Packages [9,669 kB]
Get:18 http://deb.debian.org/debian trixie/main Translation-en [6,484 kB]
Get:19 http://deb.debian.org/debian trixie/contrib amd64 Packages [53.8 kB]
Get:20 http://deb.debian.org/debian trixie/contrib Translation-en [49.6 kB]
Get:21 http://deb.debian.org/debian trixie/non-free-firmware amd64 Packages [6,868 B]
Get:22 http://deb.debian.org/debian trixie/non-free-firmware Translation-en [4,704 B]
Get:23 http://deb.debian.org/debian trixie-updates/main Sources [2,788 B]
Get:24 http://deb.debian.org/debian trixie-updates/main amd64 Packages [5,412 B]
Get:25 http://deb.debian.org/debian trixie-updates/main Translation-en [4,096 B]
Fetched 27.6 MB in 3s (8,912 kB/s)
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
666 packages can be upgraded. Run 'apt list --upgradable' to see them.
```

### Upgrade to Debian Trixie and Proxmox VE 9

Launch the upgrade:
```bash
apt-get dist-upgrade -y
```

During the process , you will be prompted to approve changes to configuration files and some service restarts. You may also be shown the output of changes, you can simply exit there by pressing `q`:
- `/etc/issue`: Proxmox VE will auto-generate this file on boot -> `No`
- `/etc/lvm/lvm.conf`: Changes relevant for Proxmox VE will be updated ->
- `/etc/ssh/sshd_config`: Depending your setup -> `Inspect`
- `/etc/default/grub`: Only if you changed it manually -> `Inspect`
- `/etc/chrony/chrony.conf`: If you did not make extra changes yourself -> `Yes`

The upgrade took about 5 minutes, depending of the hardware.

At the end of the upgrade, restart the machine:
```bash
reboot
```
### Remove Maintenance Mode

Finally when the node (hopefully) comes back, you can disable the maintenance mode. The workload which was located on that machine will come back:
```bash
ha-manager crm-command node-maintenance disable $(hostname)
```

### Post-Upgrade Validation

- Check cluster communication:
```bash
pvecm status
```

- Verify storage mounts points

- Check Ceph cluster health
```bash
ceph status
```

- Confirm VM operations, backups, and HA groups

HA groups have been removed at the profit of HA affinity rules. HA groups will be automatically migrated to HA rules.

- Disable PVE Enterprise repository

If you don't use the `pve-enterprise` repo, you can disable it:
```bash
sed -i 's/^/#/' /etc/apt/sources.list.d/pve-enterprise.sources
```

🔁 This node is now upgraded to Proxmox VE 9. You can proceed to other nodes. If all nodes have been upgraded, conclude

## Post Actions

- Remove the Ceph cluster `noout` flag:
```bash
ceph osd unset noout
```

- Recreate PCI mapping

- Add role to terraform user


New

- VM.PowerMgmt
- Sys.Console
- Sys.Audit
- VM.Config.Cloudinit
- Pool.Allocate
- SDN.Use
- VM.Config.Memory
- VM.Allocate
- VM.Console
- VM.Clone
- VM.Config.Network
- Sys.Modify
- VM.Config.Disk
- Datastore.Allocate
- VM.Config.CPU
- VM.Config.CDROM
- Datastore.Audit
- VM.Migrate
- Datastore.AllocateSpace
- VM.Config.Options
- VM.Config.HWType
- VM.Audit


To add
- VM.GuestAgent.Audit
- VM.GuestAgent.FileRead
- VM.GuestAgent.FileWrite
- VM.GuestAgent.FileSystemMgmt
- VM.GuestAgent.Unrestricted
- SDN.Audit
- Mapping.Audit
- Mapping.Use
- Sys.Syslog
- Pool.Audit

Dropped
- Permissions.Modify"
- SDN.Allocate
- Realm.Allocate
- VM.Replicate
- Realm.AllocateUser
- Sys.AccessNetwork
- Datastore.AllocateTemplate
- Sys.PowerMgmt
- User.Modify
- Mapping.Modify
- Group.Allocate
- Sys.Incoming
- VM.Backup
- VM.Snapshot
- VM.Snapshot.Rollback