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Message-ID: <54b1c171-0580-155f-d61c-ee88ca322db2@proxmox.com>
Date: Fri, 23 Jun 2023 08:59:58 +0200
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To: Proxmox VE development discussion <pve-devel@lists.proxmox.com>,
Wolf Noble <wolf@wolfspyre.com>
References: <A0D5D6F9-B205-4FD9-90AA-256FB57AB10C@wolfspyre.com>
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From: Thomas Lamprecht <t.lamprecht@proxmox.com>
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Subject: Re: [pve-devel] health check uri for proxmox web front end?
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Hi,
Am 23/06/2023 um 00:33 schrieb Wolf Noble:
> Im aware of the existing api face, however what exists now requires aut=
hentication, and seems a little heavy for my intended use:
>=20
> (hey, you alive? yes? cool! i=E2=80=99ll check again in a couple secon=
ds)=20
>=20
> Ideally, there=E2=80=99d be a super lightweight check face that respond=
s with a 200/ok, perhaps even with some light metadata cached from other =
normal operations=E2=80=A6
We are normally reluctant when adding world-readable API calls, but one
could imagine something like the "ping" one from PBS:
https://pbs.proxmox.com/docs/api-viewer/index.html#/ping
>=20
> the ideal (from my perspective) would be a target endpoint that require=
s no auth, but the authorized calling hosts must be explicitly whiteliste=
d for the node to respond to the query.
>=20
> ideally logging of =E2=80=98good=E2=80=99 state request responses would=
be optional.
>=20
> ideally, data included in the response, and it=E2=80=99s acceptable fre=
shness would also be configurable.. but i don=E2=80=99t want to overcompl=
icate things either=E2=80=A6.
>=20
> does such a mechanism exist already, and I just couldn=E2=80=99t find i=
t?
Well, you already got a proxy in-between and API tokens exists [0][1], so=
you
can always make a API path world-readable to all that can access the reve=
rse
proxy by adding a separate "virtual" URL path, that doesn't clash with ex=
isting
Proxmox VE ones, and make that point to the, e.g., node status endpoint [=
2] and
make it add the API token, restricted to just auditing, on any request as=
Authorization header.
[0]: https://pve.proxmox.com/pve-docs/chapter-pveum.html#pveum_tokens
[1]: https://pve.proxmox.com/wiki/Proxmox_VE_API#API_Tokens
[2]: https://pve.proxmox.com/pve-docs/api-viewer/#/nodes/{node}/status
>=20
> if not, is there already a feature request, or someplace this was alrea=
dy discussed?
>=20
Adding some health API call, that is less focused on the underlying host =
system
metrics, and more a central point to check if API and core services are u=
p
could be done, albeit certainly with requiring audit permissions on anyth=
ing but
a simple "yes API is there" (which can be figured out anyway by simply do=
ing any
API request, as even getting a permission denied is a good sign that API =
is working).
Anyhow, we should check closely what this endpoint should return and if i=
t wouldn't
be already covered by an existing ones (sorry, I do not have every one me=
morised ^^)
but the "/nodes/{node}/services" [3] might be also a candidate.
[3]: https://pve.proxmox.com/pve-docs/api-viewer/index.html#/nodes/{node}=
/services
> =E2=80=94- TANGENT
>=20
> another thought I had which seemed totally tangental at first blush was=
wondering if the web ui for a cluster could additionally (ie not exclusi=
vely) be served by a different class of node (i was thinking pi4=E2=80=99=
s =E2=80=A6 ) the thought was that by having an =E2=80=98administrative f=
unction only=E2=80=99 cluster node type could be a way to as a way to slo=
wly build arm64 support=E2=80=A6=20
> =E2=80=A6 as i imagine this could be useful, but getting EVERYTHING wor=
king on a dif arch is a monumentally complex task not likely to bear much=
fruit terribly quickly, but I digress=E2=80=A6
If we do another architecture then with all of Proxmox VE's as otherwise =
the stream
of confusion and feature request will never end.
FWIW, we evaluated arm64 in 2016, and the codebase is partially still con=
taining the
fundamentals for that, so community projects like Pimox [3] can exist, bu=
t for us
then the performance, boot situation and availability of server hardware =
was just
rather to disappointing them - and while the latter has improved a bit in=
recent
time, the boot situation and HW support is still rather bare bones.
[4] https://github.com/pimox/pimox7
While not totally ruling some form of arm64 support out for the future, w=
e're eyeing
more towards RISC-V, an actual open architecture.
> tia!=20
> I=E2=80=99ve been really happy with my proxmox experience over the last=
several years=E2=80=A6.=20
>=20
> thanks for all the hard work you=E2=80=99ve done keeping proxmox such a=
stable abstraction layer=E2=80=A6 its greatly appreciated.
thank you for your kind words!
regards,
Thomas