fa39c2b032
Flocker [1] is an open-source container data volume manager for Dockerized applications. This PR adds a volume plugin for Flocker. The plugin interfaces the Flocker Control Service REST API [2] to attachment attach the volume to the pod. Each kubelet host should run Flocker agents (Container Agent and Dataset Agent). The kubelet will also require environment variables that contain the host and port of the Flocker Control Service. (see Flocker architecture [3] for more). - `FLOCKER_CONTROL_SERVICE_HOST` - `FLOCKER_CONTROL_SERVICE_PORT` The contribution introduces a new 'flocker' volume type to the API with fields: - `datasetName`: which indicates the name of the dataset in Flocker added to metadata; - `size`: a human-readable number that indicates the maximum size of the requested dataset. Full documentation can be found docs/user-guide/volumes.md and examples can be found at the examples/ folder [1] https://clusterhq.com/flocker/introduction/ [2] https://docs.clusterhq.com/en/1.3.1/reference/api.html [3] https://docs.clusterhq.com/en/1.3.1/concepts/architecture.html
29 lines
878 B
Go
29 lines
878 B
Go
/*
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Copyright 2015 The Kubernetes Authors All rights reserved.
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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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http://www.apache.org/licenses/LICENSE-2.0
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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 flocker
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import "os"
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// getenvOrDefault returns the value of the enviroment variable if it's set,
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// otherwise it return the default value provided.
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func getenvOrFallback(key, defaultValue string) string {
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if v := os.Getenv(key); v != "" {
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return v
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}
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return defaultValue
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}
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