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ostree on live PXE systems #1921

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bgilbert opened this issue Sep 15, 2019 · 3 comments · May be fixed by #1995
Open

ostree on live PXE systems #1921

bgilbert opened this issue Sep 15, 2019 · 3 comments · May be fixed by #1995

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@bgilbert
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When Fedora CoreOS is booted as a live PXE system, ostree would ideally function in read-only mode, where it refuses to deploy updates (since that isn't a meaningful operation on a live system) but still provides read-only status info.

rpm-ostreed currently refuses to start on such systems because ostree is unhappy:

Error setting up sysroot: Unexpected state: /run/ostree-booted found and in / sysroot but not in a booted deployment

Live PXE systems don't need anything in /boot, since the kernel and initramfs are provided externally. Fedora CoreOS could generate a fake BLS entry if needed, though note that /proc/cmdline doesn't contain an ostree argument so we'd need to deal with that also (#1920).

What's the best way to proceed here?
@bgilbert bgilbert mentioned this issue Sep 15, 2019
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@cgwalters
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We could "standardize" /run/ostree-live here?

@bgilbert bgilbert mentioned this issue Sep 21, 2019
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@dustymabe dustymabe added jira and removed jira labels Dec 18, 2019
@cgwalters cgwalters linked a pull request Jan 22, 2020 that will close this issue
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@cgwalters
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#1995 is a WIP PR for this.

cgwalters added a commit to cgwalters/ostree that referenced this issue Mar 19, 2020
@cgwalters
sysroot: Detect "live" system on /run/ostree-live
0c45183 
Support read-only queries, but deny any attempts to make
changes with a clear error.

Now...in the future, we probably do want to support making
"transient" overlays.  See:
coreos/fedora-coreos-tracker#354 (comment)

Closes: ostreedev#1921
cgwalters added a commit to cgwalters/ostree that referenced this issue Mar 21, 2020
@cgwalters
sysroot: Detect "live" system on /run/ostree-live
2dee8b9 
Support read-only queries, but deny any attempts to make
changes with a clear error.

Now...in the future, we probably do want to support making
"transient" overlays.  See:
coreos/fedora-coreos-tracker#354 (comment)

Closes: ostreedev#1921
cgwalters added a commit to cgwalters/ostree that referenced this issue Mar 21, 2020
@cgwalters
sysroot: Detect "live" system on /run/ostree-live
44e4378 
Support read-only queries, but deny any attempts to make
changes with a clear error.

Now...in the future, we probably do want to support making
"transient" overlays.  See:
coreos/fedora-coreos-tracker#354 (comment)

Closes: ostreedev#1921
cgwalters added a commit to cgwalters/ostree that referenced this issue Mar 23, 2020
@cgwalters
sysroot: Detect "live" system on /run/ostree-live
5657f59 
Support read-only queries, but deny any attempts to make
changes with a clear error.

Now...in the future, we probably do want to support making
"transient" overlays.  See:
coreos/fedora-coreos-tracker#354 (comment)

Closes: ostreedev#1921
cgwalters added a commit to cgwalters/ostree that referenced this issue Mar 24, 2020
@cgwalters
sysroot: Detect "live" system on /run/ostree-live
74089e4 
Support read-only queries, but deny any attempts to make
changes with a clear error.

Now...in the future, we probably do want to support making
"transient" overlays.  See:
coreos/fedora-coreos-tracker#354 (comment)

Closes: ostreedev#1921
@jlebon
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jlebon commented May 26, 2020

This oddly works now in a locally built FCOS live ISO and PXE artifacts:

[root@localhost ~]# rpm-ostree status
State: idle
Deployments:
● ostree://fedora:fedora/x86_64/coreos/testing-devel
                   Version: 31.20200526.dev.0 (2020-05-26T19:18:19Z)
                    Commit: f1bbe310d7ec3ac03e1dba2c819f43daf3c7f6c88c000b20892d7d4a25881f2e
              GPGSignature: (unsigned)
[root@localhost ~]# cat /proc/cmdline
BOOT_IMAGE=fedora-coreos-31.20200526.dev.0-live-kernel-x86_64 ip=dhcp rd.neednet=1 initrd=fedora-coreos-31.20200526.dev.0-live-initramfs.x86_64.img console=tty0 console=ttyS0 ignition.config.url=http://192.168.122.1:8000/config-fcos.ign ignition.firstboot ignition.platform.id=metal BOOTIF=01-52-54-00-44-96-c9

@jlebon jlebon mentioned this issue May 3, 2024
Merged
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sysroot: Detect "live" system on /run/ostree-live cgwalters/ostree
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@cgwalters @bgilbert @dustymabe @jlebon