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Issues

TASK ERROR: VM is locked (clone)

qm unlock 105

No CIFS storage after few days

See below.

TASK ERROR: start failed: org.freedesktop.systemd1.NoSuchUnit: Unit 107.scope not found.

--- /run/samba
                         /..
    2,8 GiB [##########] /msg.lock
  444,0 KiB [          ]  gencache_notrans.tdb
    4,0 KiB [          ]  names.tdb

Workaround is to clean msg.lock directory from cron.

samba-cleanup.yml
- name: PVE | cron | samba-cleanup
  become: yes
  cron:
    name: "Clean /var/run/samba/ daily"
    user: root
    special_time: hourly
    job: "find /var/run/samba/msg.lock -type f -delete"
    state: present

no CT network connectivity after migration

1 config

Config generated by Proxmox 6 Web UI.

Main network 192.168.64.0 and VLAN 28 network works OK. No connectivity from VMs/CT connected to vmbr0

/etc/network/interfaces
auto lo
iface lo inet loopback

iface enp34s0 inet manual

auto vmbr0
iface vmbr0 inet static
	address 192.168.65.123/21
	gateway 192.168.64.1
	bridge-ports enp34s0
	bridge-stp off
	bridge-fd 0
	bridge-vlan-aware yes
	bridge-vids 2-4094
	network 192.168.64.0

auto admin
iface admin inet static
	address 192.168.28.232/22
	vlan-id 28
	vlan-raw-device enp34s0
#ADMIN vlan

2 config

Config copied from another proxmox machine where everything works ok. On this machine works only connectivity with 192.168.64.0. Packets from VLAN28 are dropped on vmbr0 

# the PVE managed interfaces into external files!

source /etc/network/interfaces.d/*

auto lo
iface lo inet loopback

iface enp34s0 inet manual

auto vmbr0.28
iface vmbr0.28 inet static
        address 192.168.28.232
        netmask 255.255.252.0
#        gateway 192.168.28.1

auto vmbr0
iface vmbr0 inet static
	address 192.168.65.123/21
	network 192.168.64.0
	gateway 192.168.64.1
	bridge-ports enp34s0
	bridge-stp off
	bridge-fd 0
	bridge-vlan-aware yes

On first system where everything works well: 

02:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller (rev 06)
	Subsystem: Micro-Star International Co., Ltd. [MSI] RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller
	Flags: bus master, fast devsel, latency 0, IRQ 17
	I/O ports at e000 [size=256]
	Memory at f7c04000 (64-bit, prefetchable) [size=4K]
	Memory at f7c00000 (64-bit, prefetchable) [size=16K]
	Capabilities: [40] Power Management version 3
	Capabilities: [50] MSI: Enable- Count=1/1 Maskable- 64bit+
	Capabilities: [70] Express Endpoint, MSI 01
	Capabilities: [b0] MSI-X: Enable+ Count=4 Masked-
	Capabilities: [d0] Vital Product Data
	Capabilities: [100] Advanced Error Reporting
	Capabilities: [140] Virtual Channel
	Capabilities: [160] Device Serial Number 01-00-00-00-68-4c-e0-00
	Kernel driver in use: r8169
	Kernel modules: r8169

[    0.962343] r8169 0000:02:00.0 eth0: RTL8168evl/8111evl, d4:3d:7e:4e:f8:de, XID 2c9, IRQ 30
[    0.963002] r8169 0000:02:00.0 eth0: jumbo features [frames: 9200 bytes, tx checksumming: ko]
[    0.970877] r8169 0000:02:00.0 enp2s0: renamed from eth0

2nd system where there is problem with bridge and vlans: 

22:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller (rev 15)
	Subsystem: Micro-Star International Co., Ltd. [MSI] RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller
	Flags: bus master, fast devsel, latency 0, IRQ 35
	I/O ports at f000 [size=256]
	Memory at f7504000 (64-bit, non-prefetchable) [size=4K]
	Memory at f7500000 (64-bit, non-prefetchable) [size=16K]
	Capabilities: [40] Power Management version 3
	Capabilities: [50] MSI: Enable- Count=1/1 Maskable- 64bit+
	Capabilities: [70] Express Endpoint, MSI 01
	Capabilities: [b0] MSI-X: Enable+ Count=4 Masked-
	Capabilities: [100] Advanced Error Reporting
	Capabilities: [140] Virtual Channel
	Capabilities: [160] Device Serial Number 01-00-00-00-68-4c-e0-00
	Capabilities: [170] Latency Tolerance Reporting
	Capabilities: [178] L1 PM Substates
	Kernel driver in use: r8169
	Kernel modules: r8169

[    1.172620] r8169 0000:22:00.0 eth0: RTL8168h/8111h, 00:d8:61:a6:46:b0, XID 541, IRQ 92
[    1.173050] r8169 0000:22:00.0 eth0: jumbo features [frames: 9200 bytes, tx checksumming: ko]
[    1.184003] r8169 0000:22:00.0 enp34s0: renamed from eth0