Commit Graph

23 Commits

Author SHA1 Message Date
Colin Walters
d9e9e5cf9b Rename ex livefs to ex apply-live
(Keeping the old name for muscle memory compatibility for now)

I think `apply-live` is a clearer name; it's more imperative
and it may not be obvious (particularly to non-native English speakers)
to parse "livefs" as "live fs".
2020-12-14 11:55:09 -05:00
Colin Walters
956d96bd1f livefs: Fix --target, add --reset and print diff
Makes this more useful.
2020-11-17 22:34:44 +01:00
Colin Walters
a76ddf0cef Rewrite livefs
Now always based on an overlayfs:
f2773c1b55
This fixes a whole swath of problems with the previous design,
including the danger in replacing `/usr/lib/ostree-boot` which
broke booting for some people.

Further, we don't need to push a rollback deployment; the livefs
changes are always transient.  So now we store livefs state
in `/run` instead of in the origin file.

Since we're doing a rewrite, it's now in Rust for much more safety.

We also always work in terms of incremental diffs between commits;
the previous huge hammer of swapping `/usr` was way too dangerous.
2020-11-16 19:07:16 +01:00
Jonathan Lebon
c6e5e80d94 vmcheck: Work around read-only /sysroot
We need to adapt some of our tests here which assume that `/sysroot` is
writable. However, in FCOS this is no longer the case now that we enable
`sysroot.readonly`.

We only remount rw for the couple of operations that need it so that we
still retain coverage for the ro path everywhere else.
2020-03-19 16:24:04 +01:00
Jonathan Lebon
035ac2eaa6 tests/vmcheck: Fully drop python 3 requirement
Drop the use of Ansible everywhere. In the few cases where we really
Python, just spawn a container instead.

This is required to be able to hack on Fedora CoreOS.

Closes: #1850
Approved by: jlebon
2019-06-10 15:36:06 +00:00
Jonathan Lebon
ed2fefad85 Move reset out of experimental
This is relatively uncontroversial functionality that has already proved
useful when helping folks debug their stuff. Let's promote it to the
stable interface.

Closes: #1682
Approved by: rfairley
2018-11-22 20:47:50 +00:00
Jonathan Lebon
6583a557ae app/livefs: Require --i-like-danger switch
We've had multiple reports by now of folks using plain `ex livefs` and
getting their bootloader wrecked:

https://github.com/projectatomic/rpm-ostree/issues/1495
https://github.com/projectatomic/rpm-ostree/issues/1504
https://github.com/ostreedev/ostree/issues/1459

Let's require a scary switch for now to emphasize this.

Closes: #1622
Approved by: cgwalters
2018-10-17 20:10:11 +00:00
Jonathan Lebon
807f21788e Hard require staging
This removes the logic around supporting opting out of the staging
feature. We don't want to support multiple configurations here, and at
this point, staging should be considered stable.

Closes: #1546
Approved by: cgwalters
2018-09-11 20:55:48 +00:00
Jonathan Lebon
86f2b67d2b vmcheck: Store temporary files in /var/tmp instead
Since `/tmp` might be on tmpfs, so we'd lose it on reboot. But we have
tests that need it to persist across reboots.

Closes: #1531
Approved by: miabbott
2018-09-07 14:20:01 +00:00
Colin Walters
b6d07487d5 Turn staged deployments on by default
We've put a lot of work into staged deployments, it's time
to pull the trigger and turn them on by default.  This is
a key step for enabling `stage` mode automatic updates by
default in e.g. Fedora CoreOS/Silverblue.

We add a new `--disable-staged` build-time option to flip
things back.

Closes: #1430
Approved by: jlebon
2018-08-20 20:32:00 +00:00
Colin Walters
44b39a7340 livefs: Require deployment staging
Staging fixes the `/etc` bug for livefs.  There's actually more
we could do here around taking advantage of staging for livefs;
for example, I think once the livefs is complete, we could just delete
the staged deployment.  And then we don't need to render on the next
boot the live status, etc.

Anyways, all that can come in the future.  This is prep for
enabling staging by default.

Closes: #1430
Approved by: jlebon
2018-08-20 20:32:00 +00:00
Colin Walters
15aecff36a livefs: Rename --replace to --dangerous-do-not-use-replace
And don't mention "replace" in the error texts.
This is (now) known broken with kernel updates; making that not
dangerous isn't going to be easy.  I debated entirely removing it
but for now let's just make it harder to use.

Ref: https://github.com/projectatomic/rpm-ostree/issues/1495

Closes: #1497
Approved by: jlebon
2018-08-09 15:04:11 +00:00
Colin Walters
63f545a6f4 tests: Replace some more libvm bits with Ansible
`vm_cmdfile()` was clearly calling out for this. I also replaced `vm_send()`
calls.

Closes: #1298
Approved by: jlebon
2018-03-14 14:13:07 +00:00
Colin Walters
95227f079a WIP: Implement ex livefs --replace
Lots of tradeoffs in this.  See the comments in the code for
more info.  WIP for now.

Closes: #1028
Approved by: jlebon
2017-10-05 13:19:20 +00:00
Jonathan Lebon
8b1001c9b5 tests/vmcheck: turn on strict bash mode
Closes: #1032
Approved by: cgwalters
2017-10-02 20:36:07 +00:00
Colin Walters
13f307da36 livefs: Update /usr/lib/{passwd,group}, run systemd-tmpfiles
This gets us to supporting live installs of `httpd` and many
other services.  I also tried `postgresql-server` for example.

Closes: https://github.com/projectatomic/rpm-ostree/issues/962

Closes: #996
Approved by: jlebon
2017-09-25 15:10:15 +00:00
Colin Walters
80de17623f tests/livefs: Make sure /usr/bin/ls is executable
Oh man was I confused how this happened; thought it was a bug in some livefs
changes I was working on.

Closes: #995
Approved by: jlebon
2017-09-15 19:10:24 +00:00
Jonathan Lebon
077d7c1a9e daemon/deploy: allow redeploying livefs booted commit
Also something I noticed while working on #981. When sitting on a livefs
commit, once a user does `rpm-ostree cleanup --pending --rollback`, it's
impossible to redeploy the same booted commit. Let's allow users to do
this.

Closes: #984
Approved by: cgwalters
2017-09-12 17:23:25 +00:00
Jonathan Lebon
114d53a02d vmcheck: fixes for CentOS 7
The `install` command in CentOS 7 is too old to understand that
`-Dt foo/bar` means creating both `foo` and `bar`, which is useful so
that we avoid an explicit `mkdir` before. But we can't do that here.

Closes: #871
Approved by: cgwalters
2017-07-18 13:58:38 +00:00
Jonathan Lebon
3b0b9fb98a vmcheck: handle livefs reruns stronger
Make sure that we wipe out any leftover configuration files from a
previous run before layering the test pkg, or we'll get false positive.
Also make sure to correctly clean up the VM in the case the livefs test
errors out.

Closes: #859
Approved by: cgwalters
2017-07-05 14:02:21 +00:00
Jonathan Lebon
2b547c2d0a tests: transition to build_rpm
Nuke all the previous goop that was used to create RPMs at `make check`
time and transition all the tests to use the new `build_rpm` function.
It definitely feels cleaner to use. It's also really nice to have the
spec live in the same file as the test that uses it.

Closes: #854
Approved by: cgwalters
2017-06-29 16:16:54 +00:00
Colin Walters
a18c2ecbf7 livefs: Fix etc merge with subdirectories
This was a kind of last-minute bug introduced when I tweaked the
checkout to use `.` to avoid a `mkdir()` for files.  But there were
multiple bugs with that; for files that are in subdirectories of `/etc`
we obviously need to get the right subdir and not use `/etc`.

Second, we need to handle the case where we're adding new subdirectories.

This change fixes `rpm-ostree install firewalld + rpm-ostree ex livefs`.

Closes: #783
Approved by: jlebon
2017-05-23 20:34:47 +00:00
Colin Walters
95e9aa4284 Introduce ex livefs
There are a few different use cases here. First, for layering new packages,
there's no good reason for us to force a reboot. Second, we want some support
for cherry-picking security updates and allowing admins to restart services.  Finally,
at some point we should offer support for entirely replacing the running tree
if that's what the user wants.

Until now we've been very conservative, but there's a spectrum here. In
particular, this patch changes things so we push a rollback before we start
doing anything live. I think in practice, many use cases would be totally fine
with doing most changes live, and falling back to the rollback if something went
wrong.

This initial code drop *only* supports live layering of new packages.  However,
a lot of the base infrastructure is laid for future work.

For now, this will be classified as an experimental feature, hence `ex livefs`.

Part of: https://github.com/projectatomic/rpm-ostree/issues/639

Closes: #652
Approved by: jlebon
2017-05-12 15:00:59 +00:00