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This PR adds initial support for the Microsoft HyperV platform. It uses HyperV and MS WMI to read key/value pairs as provided by the Windows host. Because the size allocation of the value is quite small, the ignition values will likely be split into at least 2 and more like more parts which must be read and reassembled in ignition. Supports: * coreos/fedora-coreos-tracker#1411 * coreos/fedora-coreos-tracker#1424 Signed-off-by: Brent Baude <bbaude@redhat.com>
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@@ -10,7 +10,7 @@ nav_order: 9 | |
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| ### Features | ||
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| - Support HyperV platform | ||
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| ### Changes | ||
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| // Copyright 2023 Red Hat | ||
| // | ||
| // Licensed under the Apache License, Version 2.0 (the "License"); | ||
| // you may not use this file except in compliance with the License. | ||
| // You may obtain a copy of the License at | ||
| // | ||
| // http://www.apache.org/licenses/LICENSE-2.0 | ||
| // | ||
| // Unless required by applicable law or agreed to in writing, software | ||
| // distributed under the License is distributed on an "AS IS" BASIS, | ||
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| // See the License for the specific language governing permissions and | ||
| // limitations under the License. | ||
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| package hyperv | ||
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| import ( | ||
| "os/exec" | ||
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| "github.com/containers/libhvee/pkg/kvp" | ||
| "github.com/coreos/ignition/v2/config/v3_5_experimental/types" | ||
| "github.com/coreos/ignition/v2/internal/platform" | ||
| "github.com/coreos/ignition/v2/internal/providers/util" | ||
| "github.com/coreos/ignition/v2/internal/resource" | ||
| "github.com/coreos/vcontext/report" | ||
| ) | ||
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| // key represents the prefix key name for finding kvp file parts | ||
| // in the key value pairs. it normally will have an integer added to the | ||
| // end when looking up keys sequentially | ||
| const key = "ignition.config." | ||
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| func init() { | ||
| platform.Register(platform.Provider{ | ||
| Name: "hyperv", | ||
| Fetch: fetchConfig, | ||
| }) | ||
| } | ||
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| func fetchConfig(f *resource.Fetcher) (types.Config, report.Report, error) { | ||
| f.Logger.Info("attempting to read from kvp") | ||
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| // To read key-value pairs from the Windows host, the hv_util kernel module | ||
| // must be loaded to create the kernel device itself. | ||
| _, err := f.Logger.LogCmd(exec.Command("modprobe", "hv_utils"), "loading hyperv kernel device module") | ||
| if err != nil { | ||
| return types.Config{}, report.Report{}, err | ||
| } | ||
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| keyValuePairs, err := kvp.GetKeyValuePairs() | ||
| if err != nil { | ||
| return types.Config{}, report.Report{}, err | ||
| } | ||
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| ign, _, err := keyValuePairs.GetSplitKeyValues(key, kvp.DefaultKVPPoolID) | ||
| if err != nil { | ||
| return types.Config{}, report.Report{}, err | ||
| } | ||
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| return util.ParseConfig(f.Logger, []byte(ign)) | ||
| } |
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