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To allow for CDI hooks to be added gradually we provide a generic no-op hook for unrecognised subcommands. This will log a warning instead of erroring out. An unsupported hook could be the result of a CDI specification referring to a new hook that is not yet supported by an older NVIDIA Container Toolkit version or a hook that has been removed in newer version. Signed-off-by: Evan Lezar <elezar@nvidia.com>
61 lines
1.8 KiB
Go
61 lines
1.8 KiB
Go
/**
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# Copyright (c) 2022, NVIDIA CORPORATION. All rights reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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**/
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package hook
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import (
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"github.com/NVIDIA/nvidia-container-toolkit/cmd/nvidia-cdi-hook/commands"
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"github.com/NVIDIA/nvidia-container-toolkit/internal/logger"
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"github.com/urfave/cli/v2"
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)
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type hookCommand struct {
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logger logger.Interface
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}
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// NewCommand constructs CLI subcommand for handling CDI hooks.
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func NewCommand(logger logger.Interface) *cli.Command {
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c := hookCommand{
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logger: logger,
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}
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return c.build()
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}
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// build
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func (m hookCommand) build() *cli.Command {
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// Create the 'hook' subcommand
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hook := cli.Command{
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Name: "hook",
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Usage: "A collection of hooks that may be injected into an OCI spec",
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// We set the default action for the `hook` subcommand to issue a
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// warning and exit with no error.
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// This means that if an unsupported hook is run, a container will not fail
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// to launch. An unsupported hook could be the result of a CDI specification
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// referring to a new hook that is not yet supported by an older NVIDIA
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// Container Toolkit version or a hook that has been removed in newer
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// version.
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Action: func(ctx *cli.Context) error {
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commands.IssueUnsupportedHookWarning(m.logger, ctx)
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return nil
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},
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}
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hook.Subcommands = commands.New(m.logger)
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return &hook
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}
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