This const looks to only be there for "convenience", or _possibly_ was created
with future normalization or special handling in mind.
In either case, currently it is just a direct copy (alias) for runtime.GOOS,
and defining our own type for this gives the impression that it's more than
that. It's only used in a single place, and there's no external consumers, so
let's deprecate this const, and use runtime.GOOS instead.
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
This change makes is possible to run `docker exec -u <UID> ...` when the
containerd integration is activated.
Signed-off-by: Djordje Lukic <djordje.lukic@docker.com>
This only makes the containerd ImageService implementation respect
context cancellation though.
Signed-off-by: Paweł Gronowski <pawel.gronowski@docker.com>
Implement Children method for containerd image store which makes the
`ancestor` filter work for `docker ps`. Checking if image is a children
of other image is implemented by comparing their rootfs diffids because
containerd image store doesn't have a concept of image parentship like
the graphdriver store. The child is expected to have more layers than
the parent and should start with all parent layers.
Signed-off-by: Paweł Gronowski <pawel.gronowski@docker.com>
While we currently do not provide an option to specify the snapshotter to use
for individual containers (we may want to add this option in future), currently
it already is possible to configure the snapshotter in the daemon configuration,
which could (likely) cause issues when changing and restarting the daemon.
This patch updates some code-paths that have the container available to use
the snapshotter that's configured for the container (instead of the default
snapshotter configured).
There are still code-paths to be looked into, and a tracking ticket as well as
some TODO's were added for those.
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
Previously, the AWSLogs driver attempted to implement
non-blocking itself. Non-blocking is supposed to
implemented solely by the Docker RingBuffer that
wraps the log driver.
Please see issue and explanation here:
https://github.com/moby/moby/issues/45217
Signed-off-by: Wesley Pettit <wppttt@amazon.com>
Prevent the daemon from erroring out if daemon.json contains default
network options for network drivers aside from bridge. Configuring
defaults for the bridge driver previously worked by coincidence because
the unrelated CLI flag '--bridge' exists.
Signed-off-by: Cory Snider <csnider@mirantis.com>
Attestation manifests have an OCI image media type, which makes them
being listed like they were a separate platform supported by the image.
Don't use `images.Platforms` and walk the manifest list ourselves
looking for all manifests that are an actual image manifest.
Signed-off-by: Paweł Gronowski <pawel.gronowski@docker.com>
Distribution source labels don't store port of the repository. If the
content was obtained from repository 172.17.0.2:5000 then its
corresponding label will have a key "containerd.io/distribution.source.172.17.0.2".
Fix the check in canBeMounted to ignore the :port part of the domain.
This also removes the check which prevented insecure repositories to use
cross-repo mount - the real cause was the mismatch in domain comparison.
Signed-off-by: Paweł Gronowski <pawel.gronowski@docker.com>
Distribution source label can specify multiple repositories - in this
case value is a comma separated list of source repositories.
Signed-off-by: Paweł Gronowski <pawel.gronowski@docker.com>
Previously the labels would be appended for content that was pushed
even if subsequent pushes of other content failed.
Change the behavior to only append the labels if the whole push
operation succeeded.
Signed-off-by: Paweł Gronowski <pawel.gronowski@docker.com>
Handler is called in parallel and modifying a map without
synchronization is a race condition.
Signed-off-by: Paweł Gronowski <pawel.gronowski@docker.com>
- make jobs.Add accept a list of jobs, so that we don't have to
repeatedly lock/unlock the mutex
- rename some variables that collided with imports or types
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
This implements `docker push` under containerd image store. When
pushing manifest lists that reference a content which is not present in
the local content store, it will attempt to perform the cross-repo mount
the content if possible.
Considering this scenario:
```bash
$ docker pull docker.io/library/busybox
```
This will download manifest list and only host platform-specific
manifest and blobs.
Note, tagging to a different repository (but still the same registry) and pushing:
```bash
$ docker tag docker.io/library/busybox docker.io/private-repo/mybusybox
$ docker push docker.io/private-repo/mybusybox
```
will result in error, because the neither we nor the target repository
doesn't have the manifests that the busybox manifest list references
(because manifests can't be cross-repo mounted).
If for some reason the manifests and configs for all other platforms
would be present in the content store, but only layer blobs were
missing, then the push would work, because the blobs can be cross-repo
mounted (only if we push to the same registry).
Signed-off-by: Paweł Gronowski <pawel.gronowski@docker.com>
Push the reference parsing from repo and tag names into the api and pass
a reference object to the ImageService.
Signed-off-by: Paweł Gronowski <pawel.gronowski@docker.com>
Previously commit incorrectly used image config digest as an image id
for the new image which isn't consistent with the image target.
This changes it to use manifest digest.
Signed-off-by: Paweł Gronowski <pawel.gronowski@docker.com>
Don't try to parse dangling images name (they have a non-canonical
format - `moby-dangling@sha256:...`) as a reference.
Log a warning if the image is not dangling and its name is not a valid
named reference.
Signed-off-by: Paweł Gronowski <pawel.gronowski@docker.com>
The `docker-init` binary is not intended to be a user-facing command, and as such it is more appropriate for it to be found in `/usr/libexec` (or similar) than in `PATH` (see the FHS, especially https://refspecs.linuxfoundation.org/FHS_3.0/fhs/ch04s07.html and https://refspecs.linuxfoundation.org/FHS_2.3/fhs-2.3.html#USRLIBLIBRARIESFORPROGRAMMINGANDPA).
This adjusts the logic for using that configuration option to take this into account and appropriately search for `docker-init` (or the user's configured alternative) in these directories before falling back to the existing `PATH` lookup behavior.
This behavior _used_ to exist for the old `dockerinit` binary (of a similar name and used in a similar way but for an alternative purpose), but that behavior was removed in 4357ed4a73 when that older `dockerinit` was also removed.
Most of this reasoning _also_ applies to `docker-proxy` (and various `containerd-xxx` binaries such as the shims), but this change does not affect those. It would be relatively straightforward to adapt `LookupInitPath` to be a more generic function such as `libexecLookupPath` or similar if we wanted to explore that.
See 14482589df/cli-plugins/manager/manager_unix.go for the related path list in the CLI which loads CLI plugins from a similar set of paths (with a similar rationale - plugin binaries are not typically intended to be run directly by users but rather invoked _via_ the CLI binary).
Signed-off-by: Tianon Gravi <admwiggin@gmail.com>
Commit 6a516acb2e moved the MemInfo type and
ReadMemInfo() function into the pkg/sysinfo package. In an attempt to assist
consumers of these to migrate to the new location, an alias was added.
Unfortunately, the side effect of this alias is that pkg/system now depends
on pkg/sysinfo, which means that consumers of this (such as docker/cli) now
get all (indirect) dependencies of that package as dependency, which includes
many dependencies that should only be needed for the daemon / runtime;
- github.com/cilium/ebpf
- github.com/containerd/cgroups
- github.com/coreos/go-systemd/v22
- github.com/godbus/dbus/v5
- github.com/moby/sys/mountinfo
- github.com/opencontainers/runtime-spec
This patch moves the MemInfo related code to its own package. As the previous move
was not yet part of a release, we're not adding new aliases in pkg/sysinfo.
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
idtools.MkdirAllAndChown on Windows does not chown directories, which makes
idtools.MkdirAllAndChown() just an alias for system.MkDirAll().
Also setting the filemode to `0`, as changing filemode is a no-op on Windows as
well; both of these changes should make it more transparent that no chown'ing,
nor changing filemode takes place.
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
Volumes created from the image config were not being pruned because the
volume service did not think they were anonymous since the code to
create passes along a generated name instead of letting the volume
service generate it.
This changes the code path to have the volume service generate the name
instead of doing it ahead of time.
Signed-off-by: Brian Goff <cpuguy83@gmail.com>
Commit 3246db3755 added handling for removing
cluster volumes, but in some conditions, this resulted in errors not being
returned if the volume was in use;
docker swarm init
docker volume create foo
docker create -v foo:/foo busybox top
docker volume rm foo
This patch changes the logic for ignoring "local" volume errors if swarm
is enabled (and cluster volumes supported).
While working on this fix, I also discovered that Cluster.RemoveVolume()
did not handle the "force" option correctly; while swarm correctly handled
these, the cluster backend performs a lookup of the volume first (to obtain
its ID), which would fail if the volume didn't exist.
Before this patch:
make TEST_FILTER=TestVolumesRemoveSwarmEnabled DOCKER_GRAPHDRIVER=vfs test-integration
...
Running /go/src/github.com/docker/docker/integration/volume (arm64.integration.volume) flags=-test.v -test.timeout=10m -test.run TestVolumesRemoveSwarmEnabled
...
=== RUN TestVolumesRemoveSwarmEnabled
=== PAUSE TestVolumesRemoveSwarmEnabled
=== CONT TestVolumesRemoveSwarmEnabled
=== RUN TestVolumesRemoveSwarmEnabled/volume_in_use
volume_test.go:122: assertion failed: error is nil, not errdefs.IsConflict
volume_test.go:123: assertion failed: expected an error, got nil
=== RUN TestVolumesRemoveSwarmEnabled/volume_not_in_use
=== RUN TestVolumesRemoveSwarmEnabled/non-existing_volume
=== RUN TestVolumesRemoveSwarmEnabled/non-existing_volume_force
volume_test.go:143: assertion failed: error is not nil: Error response from daemon: volume no_such_volume not found
--- FAIL: TestVolumesRemoveSwarmEnabled (1.57s)
--- FAIL: TestVolumesRemoveSwarmEnabled/volume_in_use (0.00s)
--- PASS: TestVolumesRemoveSwarmEnabled/volume_not_in_use (0.01s)
--- PASS: TestVolumesRemoveSwarmEnabled/non-existing_volume (0.00s)
--- FAIL: TestVolumesRemoveSwarmEnabled/non-existing_volume_force (0.00s)
FAIL
With this patch:
make TEST_FILTER=TestVolumesRemoveSwarmEnabled DOCKER_GRAPHDRIVER=vfs test-integration
...
Running /go/src/github.com/docker/docker/integration/volume (arm64.integration.volume) flags=-test.v -test.timeout=10m -test.run TestVolumesRemoveSwarmEnabled
...
make TEST_FILTER=TestVolumesRemoveSwarmEnabled DOCKER_GRAPHDRIVER=vfs test-integration
...
Running /go/src/github.com/docker/docker/integration/volume (arm64.integration.volume) flags=-test.v -test.timeout=10m -test.run TestVolumesRemoveSwarmEnabled
...
=== RUN TestVolumesRemoveSwarmEnabled
=== PAUSE TestVolumesRemoveSwarmEnabled
=== CONT TestVolumesRemoveSwarmEnabled
=== RUN TestVolumesRemoveSwarmEnabled/volume_in_use
=== RUN TestVolumesRemoveSwarmEnabled/volume_not_in_use
=== RUN TestVolumesRemoveSwarmEnabled/non-existing_volume
=== RUN TestVolumesRemoveSwarmEnabled/non-existing_volume_force
--- PASS: TestVolumesRemoveSwarmEnabled (1.53s)
--- PASS: TestVolumesRemoveSwarmEnabled/volume_in_use (0.00s)
--- PASS: TestVolumesRemoveSwarmEnabled/volume_not_in_use (0.01s)
--- PASS: TestVolumesRemoveSwarmEnabled/non-existing_volume (0.00s)
--- PASS: TestVolumesRemoveSwarmEnabled/non-existing_volume_force (0.00s)
PASS
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
SearchRegistryForImages does not make sense as part of the image
service interface. The implementation just wraps the search API of the
registry service to filter the results client-side. It has nothing to do
with local image storage, and the implementation of search does not need
to change when changing which backend (graph driver vs. containerd
snapshotter) is used for local image storage.
Filtering of the search results is an implementation detail: the
consumer of the results does not care which actor does the filtering so
long as the results are filtered as requested. Move filtering into the
exported API of the registry service to hide the implementation details.
Only one thing---the registry service implementation---would need to
change in order to support server-side filtering of search results if
Docker Hub or other registry servers were to add support for it to their
APIs.
Use a fake registry server in the search unit tests to avoid having to
mock out the registry API client.
Signed-off-by: Cory Snider <csnider@mirantis.com>
Co-authored-by: Nicolas De Loof <nicolas.deloof@gmail.com>
Co-authored-by: Paweł Gronowski <pawel.gronowski@docker.com>
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
This addresses the previous issue with the containerd store where, after a container is created, we can't deterministically resolve which image variant was used to run it (since we also don't store what platform the image was fetched for).
This is required for things like `docker commit`, and computing the containers layer size later, since we need to resolve the specific image variant.
Signed-off-by: Laura Brehm <laurabrehm@hey.com>
Signed-off-by: Laura Brehm <laurabrehm@hey.com>
Co-authored-by: Laura Brehm <laurabrehm@hey.com>
Co-authored-by: Sebastiaan van Stijn <github@gone.nl>
Co-authored-by: Paweł Gronowski <pawel.gronowski@docker.com>
Co-authored-by: Nicolas De Loof <nicolas.deloof@gmail.com>
The authorization.Middleware contains a sync.Mutex field, making it
non-copyable. Remove one of the barriers to allowing deep copies of
config.Config values.
Inject the middleware into Daemon as a constructor argument instead.
Signed-off-by: Cory Snider <csnider@mirantis.com>
Deprecate `<none>:<none>` and `<none>@<none>` magic strings included in
`RepoTags` and `RepoDigests`.
Produce an empty arrays instead and leave the presentation of
untagged/dangling images up to the client.
Signed-off-by: Paweł Gronowski <pawel.gronowski@docker.com>
Checking if the image creation failed due to IsAlreadyExists didn't use
the error from ImageService.Create.
Error from ImageService.Create was stored in a separate variable and
later IsAlreadyExists checked the standard `err` variable instead of the
`createErr`.
As there's no need to store the error in a separate variable - just
assign it to err variable and fix the check.
Signed-off-by: Paweł Gronowski <pawel.gronowski@docker.com>
Kubernetes only permits RuntimeClass values which are valid lowercase
RFC 1123 labels, which disallows the period character. This prevents
cri-dockerd from being able to support configuring alternative shimv2
runtimes for a pod as shimv2 runtime names must contain at least one
period character. Add support for configuring named shimv2 runtimes in
daemon.json so that runtime names can be aliased to
Kubernetes-compatible names.
Allow options to be set on shimv2 runtimes in daemon.json.
The names of the new daemon runtime config fields have been selected to
correspond with the equivalent field names in cri-containerd's
configuration so that users can more easily follow documentation from
the runtime vendor written for cri-containerd and apply it to
daemon.json.
Signed-off-by: Cory Snider <csnider@mirantis.com>
This reverts commit ab3fa46502.
This fix was partial, and is not needed with the proper fix in
containerd.
Signed-off-by: Bjorn Neergaard <bneergaard@mirantis.com>
Go 1.20 made a change to the behaviour of package "os/exec" which was
not mentioned in the release notes:
2b8f214094
Attempts to execute a directory now return syscall.EISDIR instead of
syscall.EACCESS. Check for EISDIR errors from the runtime and fudge the
returned error message to maintain compatibility with existing versions
of docker/cli when using a version of runc compiled with Go 1.20+.
Signed-off-by: Cory Snider <csnider@mirantis.com>
Implements image tagging under containerd image store.
If an image with this tag already exists, and there's no other image
with the same target, change its name. The name will have a special
format `moby-dangling@<digest>` which isn't a valid canonical reference
and doesn't resolve to any repository.
Signed-off-by: Paweł Gronowski <pawel.gronowski@docker.com>
TagImage is just a wrapper for TagImageWithReference which parses the
repo and tag into a reference. Change TagImageWithReference into
TagImage and move the responsibility of reference parsing to caller.
Signed-off-by: Paweł Gronowski <pawel.gronowski@docker.com>
`hostSupports` doesn't check if the apparmor_parser is available.
It's possible in some environments that the apparmor will be enabled but
the tool to load the profile is not available which will cause the
ensureDefaultAppArmorProfile to fail completely.
This patch checks if the apparmor_parser is available. Otherwise the
function returns early, but still logs a warning to the daemon log.
Signed-off-by: Paweł Gronowski <pawel.gronowski@docker.com>
Signed-off-by: Djordje Lukic <djordje.lukic@docker.com>
c8d/daemon: Mount root and fill BaseFS
This fixes things that were broken due to nil BaseFS like `docker cp`
and running a container with workdir override.
This is more of a temporary hack than a real solution.
The correct fix would be to refactor the code to make BaseFS and LayerRW
an implementation detail of the old image store implementation and use
the temporary mounts for the c8d implementation instead.
That requires more work though.
Signed-off-by: Paweł Gronowski <pawel.gronowski@docker.com>
daemon/images: Don't unset BaseFS
Signed-off-by: Paweł Gronowski <pawel.gronowski@docker.com>
This makes the `docker save` and `docker load` work with the containerd
image store. The archive is both OCI and Docker compatible.
Saved archive will only contain content which is available locally. In
case the saved image is a multi-platform manifest list, the behavior
depends on the local availability of the content. This is to be
reconsidered when we have the `--platform` option in the CLI.
- If all manifests and their contents, referenced by the manifest list
are present, then the manifest-list is exported directly and the ID
will be the same.
- If only one platform manifest is present, only that manifest is
exported (the image id will change and will be the id of
platform-specific manifest, instead of the full manifest list).
- If multiple, but not all, platform manifests are available, a new
manifest list will be created which will be a subset of the original
manifest list.
Signed-off-by: Paweł Gronowski <pawel.gronowski@docker.com>
The Pid field of an exit event cannot be relied upon to differentiate
exits of the container's task from exits of other container processes,
i.e. execs. The Pid is reported by the runtime and is implementation-
defined so there is no guarantee that a task's pid is distinct from the
pids of any other process in the same container. In particular,
kata-containers reports the pid of the hypervisor for all exit events.
ContainerD guarantees that the process ID of a task is set to the
corresponding container ID, so use that invariant to distinguish task
exits from other process exits.
Signed-off-by: Cory Snider <csnider@mirantis.com>
The latest version of containerd-shim-runhcs-v1 (v0.10.0-rc.4) pulled in
with the bump to ContainerD v1.7.0-rc.3 had several changes to make it
more robust, which had the side effect of increasing the worst-case
amount of time it takes for a container to exit in the worst case.
Notably, the total timeout for shutting down a task increased from 30
seconds to 60! Increase the timeouts hardcoded in the daemon and
integration tests so that they don't give up too soon.
Signed-off-by: Cory Snider <csnider@mirantis.com>
The netutils.ElectInterfaceAddresses function is only used in one place
outside of tests: in the daemon, to configure the default bridge
network. The function is also messy to reason about as it references the
shared mutable state of ipamutils.PredefinedLocalScopeDefaultNetworks.
It uses the list of predefined default networks to always return an IPv4
address even if the named interface does not exist or does not have any
IPv4 addresses. This list happens to be the same as the one used to
initialize the address pool of the 'builtin' IPAM driver, though that is
far from obvious. (Start with "./libnetwork".initIPAMDrivers and trace
the dataflow of the addressPool value. Surprise! Global state is being
mutated using the value of other global mutable state.)
The daemon does not need the fallback behaviour of
ElectInterfaceAddresses. In fact, the daemon does not have to configure
an address pool for the network at all! libnetwork will acquire one of
the available address ranges from the network's IPAM driver when the
preferred-pool configuration is unset. It will do so using the same list
of address ranges and the exact same logic
(netutils.FindAvailableNetworks) as ElectInterfaceAddresses. So unless
the daemon needs to force the network to use a specific address range
because the bridge interface already exists, it can leave the details
up to libnetwork.
Signed-off-by: Cory Snider <csnider@mirantis.com>
The pattern of parsing bool was repeated across multiple files and
caused the duplication of the invalidFilter error helper.
Signed-off-by: Paweł Gronowski <pawel.gronowski@docker.com>
After the context is cancelled, update the progress for the last time.
This makes sure that the progress also includes finishing updates.
Signed-off-by: Paweł Gronowski <pawel.gronowski@docker.com>
Basically every exported method which takes a libnetwork.Sandbox
argument asserts that the value's concrete type is *sandbox. Passing any
other implementation of the interface is a runtime error! This interface
is a footgun, and clearly not necessary. Export and use the concrete
type instead.
Signed-off-by: Cory Snider <csnider@mirantis.com>
Signed-off-by: Nicolas De Loof <nicolas.deloof@gmail.com>
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
containerd: Push progress
Signed-off-by: Paweł Gronowski <pawel.gronowski@docker.com>
If the imported layer archive is uncompressed, it gets compressed with
gzip before writing to the content store.
Archives compressed with gzip and zstd are imported as-is.
Xz and bzip2 are recompressed into gzip.
Signed-off-by: Paweł Gronowski <pawel.gronowski@docker.com>
This helps ensure that users are not surprised by unexpected tokens in
the JSON parser, or fallout later in the daemon.
Signed-off-by: Bjorn Neergaard <bneergaard@mirantis.com>
This is a pragmatic but impure choice, in order to better support the
default tools available on Windows Server, and reduce user confusion due
to otherwise inscrutable-to-the-uninitiated errors like the following:
> invalid character 'þ' looking for beginning of value
> invalid character 'ÿ' looking for beginning of value
While meaningful to those who are familiar with and are equipped to
diagnose encoding issues, these characters will be hidden when the file
is edited with a BOM-aware text editor, and further confuse the user.
Signed-off-by: Bjorn Neergaard <bneergaard@mirantis.com>
[RFC 8259] allows for JSON implementations to optionally ignore a BOM
when it helps with interoperability; do so in Moby as Notepad (the only
text editor available out of the box in many versions of Windows Server)
insists on writing UTF-8 with a BOM.
[RFC 8259]: https://tools.ietf.org/html/rfc8259#section-8.1
Signed-off-by: Bjorn Neergaard <bneergaard@mirantis.com>
By relying on the kernel UAPI (userspace API), we can drop a dependency
and simplify building Moby, while also ensuring that we are using a
stable/supported source of the C types and defines we need.
btrfs-progs mirrors the kernel headers, but the headers it ships with
are not the canonical source and as [we have seen before][44698], could
be subject to changes.
Depending on the canonical headers from the kernel both is more
idiomatic, and ensures we are protected by the kernel's promise to not
break userspace.
[44698]: https://github.com/moby/moby/issues/44698
Signed-off-by: Bjorn Neergaard <bneergaard@mirantis.com>
This is actually quite meaningless as we are reporting the libbtrfs
version, but we do not use libbtrfs. We only use the kernel interface to
btrfs instead.
While we could report the version of the kernel headers in play, they're
rather all-or-nothing: they provide the structures and defines we need,
or they don't. As such, drop all version information as the host kernel
version is the only thing that matters.
Signed-off-by: Bjorn Neergaard <bneergaard@mirantis.com>
This is a squashed version of various PRs (or related code-changes)
to implement image inspect with the containerd-integration;
- add support for image inspect
- introduce GetImageOpts to manage image inspect data in backend
- GetImage to return image tags with details
- list images matching digest to discover all tags
- Add ExposedPorts and Volumes to the image returned
- Refactor resolving/getting images
- Return the image ID on inspect
- consider digest and ignore tag when both are set
- docker run --platform
Signed-off-by: Djordje Lukic <djordje.lukic@docker.com>
Signed-off-by: Nicolas De Loof <nicolas.deloof@gmail.com>
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
The image store's used are an interface, so there's no guarantee
that implementations don't wrap the errors. Make sure to catch
such cases by using errors.Is.
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
Having this function hides what it's doing, which is just to type-cast
to an image.ID (which is a digest). Using a cast is more transparent,
so deprecating this function in favor of a regular typecast.
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
Simplify the error message so that we don't have to distinguish between static-
and non-static builds. Also update the link to the storage-driver section to
use a "/go/" redirect in the docs, as the anchor link was no longer correct.
Using a "/go/" redirect makes sure the link remains functional if docs is moving
around.
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
This function was added in b86e3bee5a to
work around an issue in os/user.Current(), which SEGFAULTS when compiling
statically with cgo enabled (see golang/go#13470).
We hit similar issues in other parts, and contributed a "osusergo" build-
tag in https://go-review.googlesource.com/c/go/+/330753. The "osusergo"
build tag must be set when compiling static binaries with cgo enabled.
If that build-tag is set, the cgo implementation for user.Current() won't
be used, and a pure-go implementation is used instead;
https://github.com/golang/go/blob/go1.19.4/src/os/user/cgo_lookup_unix.go#L5
With the above in place, we no longer need this workaround, and can remove
the ensureHomeIfIAmStatic() function.
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
