[Snap] web server won't start - 4.4.2_dev1 (edge channel)

[YamiYukiSenpai]

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In this case, just add a comment on this existing issue.

Describe the bug
Glances web server won't start on the edge channel

To Reproduce
Steps to reproduce the behavior:

1. sudo /usr/bin/snap run glances --browser -w

Expected behavior
Glances web server starts

Screenshots
If applicable, add screenshots to help explain your problem.

Environement (please complete the following information)

• Operating System (lsb_release -a or OS name/version):

  LSB Version:    n/a
  Distributor ID: Garuda
  Description:    Garuda Linux Broadwing
  Release:        Soaring
  Codename:       Broadwing
  

• Glances & psutil versions:

  Glances version:        4.4.2_dev1
  Glances API version:    4
  PsUtil version:         7.1.3
  Log file:               /tmp/glances-yamiyuki.log
  

• How do you install Glances (Pypi package, script, package manager, source): Snap store
• Glances test: To be completed with result of: glances --issue

===============================================================================
Glances 4.4.2_dev1 (/snap/glances/2535/lib/python3.12/site-packages/glances/__init__.py)
Python 3.12.3 (/snap/glances/2535/bin/python3)
PsUtil 7.1.3 (/snap/glances/2535/lib/python3.12/site-packages/psutil/__init__.py)
===============================================================================
alert         [OK]    0.00001s 
[]
amps          [OK]    0.00009s key=name 
[{'count': 0,
  'countmax': None,
  'countmin': 1.0,
  'key': 'name',
  'name': 'Dropbox',
  'refresh': 3.0,
  'regex': True,
  'result': None,
  'timer': 2.260002851486206}, ...]
cloud         [NA]
connections   [NA]
containers    [OK]    0.00004s 
[]
core          [OK]    0.00083s 
{'log': 24, 'phys': 12}
cpu           [OK]    0.00039s 
{'cpucore': 24,
 'ctx_switches': 0,
 'ctx_switches_gauge': 5438394476,
 'ctx_switches_rate_per_sec': 0,
 'guest': 0.0,
 'idle': 95.8,
 'interrupts': 0,
 'interrupts_gauge': 4037887572,
 'interrupts_rate_per_sec': 0,
 'iowait': 0.0,
 'irq': 0.2,
 'nice': 1.5,
 'soft_interrupts': 0,
 'soft_interrupts_gauge': 1109130574,
 'soft_interrupts_rate_per_sec': 0,
 'steal': 0.0,
 'syscalls': 0,
 'syscalls_gauge': 0,
 'syscalls_rate_per_sec': 0,
 'system': 1.2,
 'time_since_update': 2.190673828125,
 'total': 4.2,
 'user': 1.1}
diskio        [OK]    0.00167s key=disk_name 
[{'disk_name': 'sda',
  'key': 'disk_name',
  'read_bytes': 0,
  'read_bytes_gauge': 3127726080,
  'read_bytes_rate_per_sec': 0,
  'read_count': 0,
  'read_count_gauge': 61213,
  'read_count_rate_per_sec': 0,
  'read_latency': 0,
  'read_time': 0,
  'read_time_gauge': 41331,
  'read_time_rate_per_sec': 0,
  'time_since_update': 2.191342353820801,
  'write_bytes': 0,
  'write_bytes_gauge': 25082396672,
  'write_bytes_rate_per_sec': 0,
  'write_count': 0,
  'write_count_gauge': 177848,
  'write_count_rate_per_sec': 0,
  'write_latency': 0,
  'write_time': 0,
  'write_time_gauge': 307270,
  'write_time_rate_per_sec': 0}, ...]
folders       [OK]    0.00002s 
[]
fs            [OK]    0.00418s 
[]
gpu           [OK]    0.00745s key=gpu_id 
[{'fan_speed': None, 'gpu_id': 'amd0', 'key': 'gpu_id', 'mem': 23, 'name': 'AMD GPU', 'proc': 0, 'temperature': 56}, ...]
help          [OK]    0.00000s 
None
ip            [OK]    0.00001s 
{}
irq           [NA]
load          [OK]    0.00003s 
{'cpucore': 24, 'min1': 0.8154296875, 'min15': 0.90283203125, 'min5': 0.8779296875}
mem           [OK]    0.00010s 
{'active': 18776604672,
 'available': 44526215168,
 'buffers': 2764800,
 'cached': 44452630528,
 'free': 1629294592,
 'inactive': 39225315328,
 'percent': 33.8,
 'shared': 1036251136,
 'total': 67301244928,
 'used': 22775029760}
memswap       [OK]    0.00014s 
{'free': 65954619392,
 'percent': 2.0,
 'sin': 4269027328,
 'sout': 7928721408,
 'time_since_update': 2.192260265350342,
 'total': 67300749312,
 'used': 1346129920}
network       [OK]    0.00078s key=interface_name 
[{'alias': None,
  'bytes_all': 214487,
  'bytes_all_gauge': 239259283635,
  'bytes_all_rate_per_sec': 106251.0,
  'bytes_recv': 204234,
  'bytes_recv_gauge': 229474655334,
  'bytes_recv_rate_per_sec': 101172.0,
  'bytes_sent': 10253,
  'bytes_sent_gauge': 9784628301,
  'bytes_sent_rate_per_sec': 5079.0,
  'interface_name': 'br0',
  'key': 'interface_name',
  'speed': 2621440000,
  'time_since_update': 2.018679618835449}, ...]
now           [OK]    0.00002s 
{'custom': '2025-11-17 00:19:19 EST', 'iso': '2025-11-17T00:19:19-05:00'}
percpu        [OK]    0.00067s key=cpu_number 
[{'cpu_number': 0,
  'dpc': None,
  'guest': 0.0,
  'guest_nice': 0.0,
  'idle': 91.7,
  'interrupt': None,
  'iowait': 0.0,
  'irq': 0.5,
  'key': 'cpu_number',
  'nice': 2.8,
  'softirq': 1.4,
  'steal': 0.0,
  'system': 2.3,
  'total': 8.3,
  'user': 1.4}, ...]
ports         [OK]    0.00001s 
[]
processcount  [OK]    0.12617s 
{'pid_max': 0, 'running': 1, 'sleeping': 418, 'thread': 4180, 'total': 722}
processlist   [OK]    0.00021s 
[]
programlist   [OK]    0.00214s 
[]
psutilversion [OK]    0.00002s 
'7.1.3'
quicklook     [OK]    0.00031s 
{'cpu': 4.2,
 'cpu_hz': 4954565000.000001,
 'cpu_hz_current': 2434980791.6666665,
 'cpu_log_core': 24,
 'cpu_name': 'AMD Ryzen 9 5900X 12-Core Processor',
 'cpu_phys_core': 12,
 'load': 3.8,
 'mem': 33.9,
 'percpu': [{...}, {...}, {...}, {...}, {...}, {...}, {...}, {...}, {...}, {...}, {...}, {...}, {...}, {...}, {...},
            {...}, {...}, {...}, {...}, {...}, {...}, {...}, {...}, {...}],
 'swap': 2.0}
raid          [NA]
sensors       [OK]    0.00000s key=label 
[{'critical': 84,
  'key': 'label',
  'label': 'Composite',
  'type': 'temperature_core',
  'unit': 'C',
  'value': 45,
  'warning': 81}, ...]
smart         [NA]
system        [OK]    0.00000s 
{'hostname': 'Y4M1-II',
 'hr_name': 'Ubuntu Core 24 64bit / Linux 6.17.7-zen1-2-zen',
 'linux_distro': 'Ubuntu Core 24',
 'os_name': 'Linux',
 'os_version': '6.17.7-zen1-2-zen',
 'platform': '64bit'}
uptime        [OK]    0.00012s 
{'seconds': 180397}
version       [OK]    0.00001s 
'4.4.2_dev1'
vms           [NA]
wifi          [OK]    0.00006s 
[]
===============================================================================
Total time to update all stats: 0.14727s
===============================================================================

Additional context

Reverted to stable channel to get it started

> snap info glances | grep -ie tracking -e installed
tracking:     latest/edge
installed:          4.4.2+build00            (2535) 18MB -

> sudo /usr/bin/snap run glances --browser -w          


  _____ _
 / ____| |
| |  __| | __ _ _ __   ___ ___  ___
| | |_ | |/ _` | '_ \ / __/ _ \/ __|
| |__| | | (_| | | | | (_|  __/\__
 \_____|_|\__,_|_| |_|\___\___||___/ 4.4.2_dev1
        
Glances Browser Web User Interface started on https://0.0.0.0:61208/browser
Glances Web User Interface started on https://0.0.0.0:61208/
Glances RESTful API Server started on https://0.0.0.0:61208/api/4
Exception in thread Thread-2 (run):
Traceback (most recent call last):
  File "/usr/lib/python3.12/threading.py", line 1073, in _bootstrap_inner
    self.run()
  File "/usr/lib/python3.12/threading.py", line 1010, in run
    self._target(*self._args, **self._kwargs)
  File "/snap/glances/2535/lib/python3.12/site-packages/uvicorn/server.py", line 67, in run
    return asyncio_run(self.serve(sockets=sockets), loop_factory=self.config.get_loop_factory())
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3.12/asyncio/runners.py", line 194, in run
    return runner.run(main)
           ^^^^^^^^^^^^^^^^
  File "/usr/lib/python3.12/asyncio/runners.py", line 118, in run
    return self._loop.run_until_complete(task)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3.12/asyncio/base_events.py", line 687, in run_until_complete
    return future.result()
           ^^^^^^^^^^^^^^^
  File "/snap/glances/2535/lib/python3.12/site-packages/uvicorn/server.py", line 71, in serve
    await self._serve(sockets)
  File "/snap/glances/2535/lib/python3.12/site-packages/uvicorn/server.py", line 78, in _serve
    config.load()
  File "/snap/glances/2535/lib/python3.12/site-packages/uvicorn/config.py", line 405, in load
    self.ssl: ssl.SSLContext | None = create_ssl_context(
                                      ^^^^^^^^^^^^^^^^^^^
  File "/snap/glances/2535/lib/python3.12/site-packages/uvicorn/config.py", line 116, in create_ssl_context
    ctx.load_cert_chain(certfile, keyfile, get_password)
FileNotFoundError: [Errno 2] No such file or directory

• the Glances configuration file (https://glances.readthedocs.io/en/latest/config.html#location)
• the Glances log file (https://glances.readthedocs.io/en/latest/config.html#logging)

[TechTitanR]

It looks like the issue is caused by missing "SSL certificate" files inside the
Snap edge build. The traceback shows Uvicorn trying to load the certificate:

ctx.load_cert_chain(certfile, keyfile)

and failing with FileNotFoundError, which means the cert and key files were not
bundled inside the Snap package.

Since the stable channel works, this is likely a packaging issue specific to the
4.4.2_dev1 edge build. The Snap sandbox prevents Glances from accessing system
SSL paths, so missing certificates cause the web server to crash.

The maintainer may need to:

• bundle default cert.pem/key.pem in the Snap package, or
• auto-generate them on first run, or
• fall back to HTTP when SSL files are unavailable.

This looks like a packaging issue affecting the edge Snap rather than a
configuration mistake by the user.

[nicolargo]

Edge version is based on develop branch. Develop branch may be instable.

To solve the issue, wait some time, the next Edge snap build should solve the issue or change the glances.conf file and comment the following lines in the "outputs" section:

#ssl_keyfile=./glances.local+3-key.pem
#ssl_certfile=./glances.local+3.pem