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[receiver/dockerstatsreceiver] refactor docker client (#4702)
Moving docker client into new shared internal/docker **Description:** The client in the docker stats receiver has useful functionality for use in other components, such as the docker observer. **Link to tracking Issue:** #4446
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Mark Stumpf
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Sep 21, 2021
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| include ../../Makefile.Common |
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| // Copyright 2020, OpenTelemetry Authors | ||
| // | ||
| // 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 docker | ||
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| import ( | ||
| "errors" | ||
| "fmt" | ||
| "time" | ||
| ) | ||
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| type Config struct { | ||
| // The URL of the docker server. Default is "unix:///var/run/docker.sock" | ||
| Endpoint string `mapstructure:"endpoint"` | ||
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| // The maximum amount of time to wait for docker API responses. Default is 5s | ||
| Timeout time.Duration `mapstructure:"timeout"` | ||
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| // A list of filters whose matching images are to be excluded. Supports literals, globs, and regex. | ||
| ExcludedImages []string `mapstructure:"excluded_images"` | ||
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| // Docker client API version. | ||
| DockerAPIVersion float64 `mapstructure:"api_version"` | ||
| } | ||
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| // NewConfig creates a new config to be used when creating | ||
| // a docker client | ||
| func NewConfig(endpoint string, timeout time.Duration, excludedImages []string, apiVersion float64) (*Config, error) { | ||
| cfg := &Config{ | ||
| Endpoint: endpoint, | ||
| Timeout: timeout, | ||
| ExcludedImages: excludedImages, | ||
| DockerAPIVersion: apiVersion, | ||
| } | ||
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| err := cfg.validate() | ||
| return cfg, err | ||
| } | ||
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| // NewDefaultConfig creates a new config with default values | ||
| // to be used when creating a docker client | ||
| func NewDefaultConfig() *Config { | ||
| cfg := &Config{ | ||
| Endpoint: "unix:///var/run/docker.sock", | ||
| Timeout: 5 * time.Second, | ||
| DockerAPIVersion: minimalRequiredDockerAPIVersion, | ||
| } | ||
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| return cfg | ||
| } | ||
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| // validate asserts that an endpoint field is set | ||
| // on the config struct | ||
| func (config Config) validate() error { | ||
| if config.Endpoint == "" { | ||
| return errors.New("config.Endpoint must be specified") | ||
| } | ||
| if config.DockerAPIVersion < minimalRequiredDockerAPIVersion { | ||
| return fmt.Errorf("Docker API version must be at least %v", minimalRequiredDockerAPIVersion) | ||
| } | ||
| return nil | ||
| } |
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