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root@PVE-03:~# vi /etc/apt/sources.list.d/pve-enterprise.list
# deb https://enterprise.proxmox.com/debian/pve bookworm pve-enterprise

root@PVE-03:~# vi /etc/apt/sources.list.d/pve-no-subscription.list
deb http://download.proxmox.com/debian/pve bookworm pve-no-subscription

root@PVE-03:~# vi /etc/apt/sources.list
deb http://ftp.debian.org/debian bookworm main contrib
deb http://ftp.debian.org/debian bookworm-updates main contrib
# PVE pve-no-subscription repository provided by proxmox.com,
# NOT recommended for production use
deb http://download.proxmox.com/debian/pve bookworm pve-no-subscription
# security updates
deb http://security.debian.org/debian-security bookworm-security main contrib

root@PVE-03:~# pve7to8
= CHECKING VERSION INFORMATION FOR PVE PACKAGES =

Checking for package updates..
PASS: all packages up-to-date

Checking proxmox-ve package version..
PASS: proxmox-ve package has version >= 7.4-1

Checking running kernel version..
PASS: running kernel ‚5.15.108-1-pve‘ is considered suitable for upgrade.

= CHECKING CLUSTER HEALTH/SETTINGS =

SKIP: standalone node.

= CHECKING HYPER-CONVERGED CEPH STATUS =

SKIP: no hyper-converged ceph setup detected!

= CHECKING CONFIGURED STORAGES =

PBS-01: error fetching datastores – 500 Can’t connect to 192.168.1.150:8007 (No route to host)
WARN: storage ‚PBS-01‘ enabled but not active!
PASS: storage ‚SSD500‘ enabled and active.
PASS: storage ‚SSD512‘ enabled and active.
PASS: storage ‚local‘ enabled and active.
PASS: storage ‚local-lvm‘ enabled and active.
INFO: Checking storage content type configuration..
PASS: no storage content problems found
PASS: no storage re-uses a directory for multiple content types.

= MISCELLANEOUS CHECKS =

INFO: Checking common daemon services..
PASS: systemd unit ‚pveproxy.service‘ is in state ‚active‘
PASS: systemd unit ‚pvedaemon.service‘ is in state ‚active‘
PASS: systemd unit ‚pvescheduler.service‘ is in state ‚active‘
PASS: systemd unit ‚pvestatd.service‘ is in state ‚active‘
INFO: Checking for supported & active NTP service..
PASS: Detected active time synchronisation unit ‚chrony.service‘
INFO: Checking for running guests..
PASS: no running guest detected.
INFO: Checking if the local node’s hostname ‚PVE-03‘ is resolvable..
INFO: Checking if resolved IP is configured on local node..
PASS: Resolved node IP ‚192.168.1.148‘ configured and active on single interface.
INFO: Check node certificate’s RSA key size
PASS: Certificate ‚pve-root-ca.pem‘ passed Debian Busters (and newer) security level for TLS connections (4096 >= 2048)
PASS: Certificate ‚pve-ssl.pem‘ passed Debian Busters (and newer) security level for TLS connections (2048 >= 2048)
INFO: Checking backup retention settings..
PASS: no backup retention problems found.
INFO: checking CIFS credential location..
PASS: no CIFS credentials at outdated location found.
INFO: Checking permission system changes..
INFO: Checking custom role IDs for clashes with new ‚PVE‘ namespace..
PASS: no custom roles defined, so no clash with ‚PVE‘ role ID namespace enforced in Proxmox VE 8
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 node and guest description/note length..
PASS: All node config descriptions fit in the new limit of 64 KiB
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 if the suite for the Debian security repository is correct..
INFO: Checking for existence of NVIDIA vGPU Manager..
PASS: No NVIDIA vGPU Service found.
INFO: Checking bootloader configuration…
SKIP: not yet upgraded, no need to check the presence of systemd-boot
SKIP: NOTE: Expensive checks, like CT cgroupv2 compat, not performed without ‚–full‘ parameter

= SUMMARY =

TOTAL: 31
PASSED: 25
SKIPPED: 5
WARNINGS: 1
FAILURES: 0

ATTENTION: Please check the output for detailed information!
root@PVE-03:~#

root@PVE-03:~# apt update
Hit:1 http://download.proxmox.com/debian/pve bullseye InRelease
Hit:2 http://ftp.debian.org/debian bullseye InRelease
Hit:3 http://security.debian.org/debian-security bullseye-security InRelease
Hit:4 http://ftp.debian.org/debian bullseye-updates InRelease
Reading package lists… Done
Building dependency tree… Done
Reading state information… Done
All packages are up to date.
W: Target Packages (pve-no-subscription/binary-amd64/Packages) is configured multiple times in /etc/apt/sources.list:5 and /etc/apt/sources.list.d/pve-no-subscription.list:1
W: Target Packages (pve-no-subscription/binary-all/Packages) is configured multiple times in /etc/apt/sources.list:5 and /etc/apt/sources.list.d/pve-no-subscription.list:1
W: Target Translations (pve-no-subscription/i18n/Translation-en_US) is configured multiple times in /etc/apt/sources.list:5 and /etc/apt/sources.list.d/pve-no-subscription.list:1
W: Target Translations (pve-no-subscription/i18n/Translation-en) is configured multiple times in /etc/apt/sources.list:5 and /etc/apt/sources.list.d/pve-no-subscription.list:1
W: Target Packages (pve-no-subscription/binary-amd64/Packages) is configured multiple times in /etc/apt/sources.list:5 and /etc/apt/sources.list.d/pve-no-subscription.list:1
W: Target Packages (pve-no-subscription/binary-all/Packages) is configured multiple times in /etc/apt/sources.list:5 and /etc/apt/sources.list.d/pve-no-subscription.list:1
W: Target Translations (pve-no-subscription/i18n/Translation-en_US) is configured multiple times in /etc/apt/sources.list:5 and /etc/apt/sources.list.d/pve-no-subscription.list:1
W: Target Translations (pve-no-subscription/i18n/Translation-en) is configured multiple times in /etc/apt/sources.list:5 and /etc/apt/sources.list.d/pve-no-subscription.list:1

root@PVE-03:~# apt dist-upgrade
Reading package lists… Done
Building dependency tree… Done
Reading state information… Done
Calculating upgrade… Done
The following packages were automatically installed and are no longer required:
pve-kernel-5.15.102-1-pve pve-kernel-5.15.104-1-pve pve-kernel-5.15.107-1-pve
pve-kernel-5.15.83-1-pve pve-kernel-5.15.85-1-pve
Use ‚apt autoremove‘ to remove them.
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.

root@PVE-03:~#

root@PVE-03:~# pveversion
pve-manager/7.4-15/a5d2a31e (running kernel: 5.15.108-1-pve)

root@PVE-03:~#

root@PVE-03:~# sed -i ’s/bullseye/bookworm/g‘ /etc/apt/sources.list

root@PVE-03:~#

root@PVE-03:~# sed -i -e ’s/bullseye/bookworm/g‘ /etc/apt/sources.list.d/pve-no-subscription.list

root@PVE-03:~#

root@PVE-03:~# apt update
Get:1 http://security.debian.org/debian-security bookworm-security InRelease [48.0 kB]
Get:2 http://ftp.debian.org/debian bookworm InRelease [147 kB]
Get:3 http://ftp.debian.org/debian bookworm-updates InRelease [52.1 kB]
Get:4 http://security.debian.org/debian-security bookworm-security/main amd64 Packages [30.4 kB]
Get:5 http://security.debian.org/debian-security bookworm-security/main Translation-en [15.0 kB]
Get:6 http://ftp.debian.org/debian bookworm/main amd64 Packages [8,904 kB]
Get:7 http://download.proxmox.com/debian/pve bookworm InRelease [2,661 B]
Get:8 http://ftp.debian.org/debian bookworm/main Translation-en [6,076 kB]
Get:9 http://download.proxmox.com/debian/pve bookworm/pve-no-subscription amd64 Packages [73.5 kB]
Get:10 http://ftp.debian.org/debian bookworm/contrib amd64 Packages [54.3 kB]
Get:11 http://ftp.debian.org/debian bookworm/contrib Translation-en [48.7 kB]
Fetched 15.5 MB in 4s (4,343 kB/s)
Reading package lists… Done
Building dependency tree… Done
Reading state information… Done
587 packages can be upgraded. Run ‚apt list –upgradable‘ to see them.
W: Target Packages (pve-no-subscription/binary-amd64/Packages) is configured multiple times in /etc/apt/sources.list:5 and /etc/apt/sources.list.d/pve-no-subscription.list:1
W: Target Packages (pve-no-subscription/binary-all/Packages) is configured multiple times in /etc/apt/sources.list:5 and /etc/apt/sources.list.d/pve-no-subscription.list:1
W: Target Translations (pve-no-subscription/i18n/Translation-en_US) is configured multiple times in /etc/apt/sources.list:5 and /etc/apt/sources.list.d/pve-no-subscription.list:1
W: Target Translations (pve-no-subscription/i18n/Translation-en) is configured multiple times in /etc/apt/sources.list:5 and /etc/apt/sources.list.d/pve-no-subscription.list:1
W: Target Packages (pve-no-subscription/binary-amd64/Packages) is configured multiple times in /etc/apt/sources.list:5 and /etc/apt/sources.list.d/pve-no-subscription.list:1
W: Target Packages (pve-no-subscription/binary-all/Packages) is configured multiple times in /etc/apt/sources.list:5 and /etc/apt/sources.list.d/pve-no-subscription.list:1
W: Target Translations (pve-no-subscription/i18n/Translation-en_US) is configured multiple times in /etc/apt/sources.list:5 and /etc/apt/sources.list.d/pve-no-subscription.list:1
W: Target Translations (pve-no-subscription/i18n/Translation-en) is configured multiple times in /etc/apt/sources.list:5 and /etc/apt/sources.list.d/pve-no-subscription.list:1

root@PVE-03:~#

root@PVE-03:~# apt apt dist-upgrade

Proxmox Virtual Environment (VE) 8.0 – Upgrade_from_7_to_8