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providers/nutanix: add Nutanix platform
Add Nutanix AHV platform support(coreos/fedora-coreos-tracker#1007) which is similar to Openstack.
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// Copyright 2021 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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// The Nutanix AHV (https://www.nutanix.com/products/ahv) provider fetches | ||
// configuration from the userdata available in the config-drive. It is similar | ||
// to Openstack and uses the same APIs. | ||
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package nutanix | ||
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import ( | ||
"fmt" | ||
"io/ioutil" | ||
"os" | ||
"os/exec" | ||
"path/filepath" | ||
"time" | ||
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"github.com/coreos/ignition/v2/config/v3_4_experimental/types" | ||
"github.com/coreos/ignition/v2/internal/distro" | ||
"github.com/coreos/ignition/v2/internal/log" | ||
"github.com/coreos/ignition/v2/internal/providers/util" | ||
"github.com/coreos/ignition/v2/internal/resource" | ||
ut "github.com/coreos/ignition/v2/internal/util" | ||
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"github.com/coreos/vcontext/report" | ||
) | ||
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const ( | ||
configDriveUserdataPath = "/openstack/latest/user_data" | ||
) | ||
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func FetchConfig(f *resource.Fetcher) (types.Config, report.Report, error) { | ||
data, err := fetchConfigFromDevice(f.Logger, filepath.Join(distro.DiskByLabelDir(), "config-2")) | ||
if err != nil { | ||
return types.Config{}, report.Report{}, err | ||
} | ||
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return util.ParseConfig(f.Logger, data) | ||
} | ||
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func fileExists(path string) bool { | ||
_, err := os.Stat(path) | ||
return (err == nil) | ||
} | ||
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func fetchConfigFromDevice(logger *log.Logger, path string) ([]byte, error) { | ||
// The config drive is always attached, even if there's no user-data passed | ||
for !fileExists(path) { | ||
logger.Debug("config drive (%q) not found. Waiting...", path) | ||
time.Sleep(time.Second) | ||
} | ||
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logger.Debug("creating temporary mount point") | ||
mnt, err := ioutil.TempDir("", "ignition-configdrive") | ||
if err != nil { | ||
return nil, fmt.Errorf("failed to create temp directory: %v", err) | ||
} | ||
defer os.Remove(mnt) | ||
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cmd := exec.Command(distro.MountCmd(), "-o", "ro", "-t", "auto", path, mnt) | ||
if _, err := logger.LogCmd(cmd, "mounting config drive"); err != nil { | ||
return nil, err | ||
} | ||
defer func() { | ||
_ = logger.LogOp( | ||
func() error { | ||
return ut.UmountPath(mnt) | ||
}, | ||
"unmounting %q at %q", path, mnt, | ||
) | ||
}() | ||
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mntConfigDriveUserdataPath := filepath.Join(mnt, configDriveUserdataPath) | ||
if !fileExists(mntConfigDriveUserdataPath) { | ||
return nil, nil | ||
} | ||
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return ioutil.ReadFile(mntConfigDriveUserdataPath) | ||
} |