When raw_exec is configured with [`no_cgroups`](https://www.nomadproject.io/docs/drivers/raw_exec#no_cgroups), raw_exec shouldn't attempt to create a cgroup.
Prior to this change, we accidentally always required freezer cgroup to do stats PID tracking. We already have the proper fallback in place for metrics, so only need to ensure that we don't create a cgroup for the task.
Fixes https://github.com/hashicorp/nomad/issues/8565
The unpublish workflow requires that we know the mode (RW vs RO) if we want to
unpublish the node. Update the hook and the Unpublish RPC so that we mark the
claim for release in a new state but leave the mode alone. This fixes a bug
where RO claims were failing node unpublish.
The core job GC doesn't know the mode, but we don't need it for that workflow,
so add a mode specifically for GC; the volumewatcher uses this as a sentinel
to check whether claims (with their specific RW vs RO modes) need to be claimed.
The default behavior for `docker.volumes.enabled` is intended to be `false`,
but the HCL schema defaults to `true` if the value is unset. Set the default
literal value to `true`.
Additionally, Docker driver mounts of type "volume" (but not "bind") are not
being properly sandboxed with that setting. Disable Docker mounts with type
"volume" entirely whenever the `docker.volumes.enabled` flag is set to
false. Note this is unrelated to the `volume_mount` feature, which is
constrained to preconfigured host volumes or whatever is mounted by a CSI
plugin.
This changeset includes updates to unit tests that should have been failing
under the documented behavior but were not.
Even if a plugin sends back an empty `[]*device.DeviceGroup`, it's transformed to `nil` during the RPC. Our custom device plugin is returning empty `FingerprintResponse.Devices` very often. Our temporary fix is to send a dummy `*DeviceGroup` if the slice is empty. This has the effect of never triggering the "first fingerprint" and therefore timing out after 50s.
In turn, this made our node exceed its hearbeat grace period when restarting it, revoking all vault tokens for its allocations, causing a restart of all our allocations because the token couldn't be renewed.
Removing the logic for `f.Devices == nil` does not appear to affect the functionality of the function.
Previously, it was required that you `go get github.com/hashicorp/nomad` to be
able to build protos, as the protoc invocation added an include directive that
pointed to `$GOPATH/src`, which is how dependent protos were discovered. As
Nomad now uses Go modules, it won't necessarily be cloned to `$GOPATH`.
(Additionally, if you _had_ go-gotten Nomad at some point, protoc compilation
would have possibly used the _wrong_ protos, as those wouldn't necessarily be
the most up-to-date ones.)
This change modifies the proto files and the `protoc` invocation to handle
discovering dependent protos via protoc plugin modifier statements that are
specific to the protoc plugin being used.
In this change, `make proto` was run to recompile the protos, which results in
changes only to the gzipped `FileDescriptorProto`.
This fixes a bug where pre-0.9 executors fail to recover after an
upgrade.
The bug is that legacyExecutorWrappers didn't get updated with
ExecStreaming function, and thus failed to implement the Executor
function. Sadly, this meant that all recovery attempts fail, as the
runtime check in
b312aacbc9/drivers/shared/executor/utils.go (L103-L110)
.
In Nomad v0.12.0, the client added additional fingerprinting around the
presense of the bridge kernel module. The fingerprinter only checked in
`/proc/modules` which is a list of loaded modules. In some cases, the
bridge kernel module is builtin rather than dynamically loaded. The fix
for that case is in #8721. However we were still missing the case where
the bridge module is dynamically loaded, but not yet loaded during the
startup of the Nomad agent. In this case the fingerprinter would believe
the bridge module was unavailable when really it gets loaded on demand.
This PR now has the fingerprinter scan the kernel module dependency file,
which will contain an entry for the bridge module even if it is not yet
loaded.
In summary, the client now looks for the bridge kernel module in
- /proc/modules
- /lib/modules/<kernel>/modules.builtin
- /lib/modules/<kernel>/modules.dep
Closes#8423
Small changes to the Windows 2016 Packer build for debuggability of
provisioning:
* improve verbosity of powershell error handling
* remove unused "tools" installation
* use ssh communicator for Packer to improve Packer build times and eliminate
deprecated winrm remote access (unavailable from current macOS)
