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https://github.com/ianlopshire/go-ssm-config
Go utility for loading configuration parameters from AWS SSM (Parameter Store)
https://github.com/ianlopshire/go-ssm-config
aws-ssm configuration go
Last synced: 14 days ago
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Go utility for loading configuration parameters from AWS SSM (Parameter Store)
- Host: GitHub
- URL: https://github.com/ianlopshire/go-ssm-config
- Owner: ianlopshire
- License: mit
- Created: 2019-12-02T18:47:38.000Z (almost 5 years ago)
- Default Branch: master
- Last Pushed: 2023-10-09T16:49:48.000Z (about 1 year ago)
- Last Synced: 2024-07-31T20:44:33.225Z (3 months ago)
- Topics: aws-ssm, configuration, go
- Language: Go
- Homepage: http://godoc.org/github.com/ianlopshire/go-ssm-config
- Size: 13.7 KB
- Stars: 20
- Watchers: 2
- Forks: 13
- Open Issues: 7
-
Metadata Files:
- Readme: README.md
- Contributing: CONTRIBUTING.md
- License: LICENSE
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README
# ssmconfig [](http://godoc.org/github.com/ianlopshire/go-ssm-config) [](https://goreportcard.com/report/github.com/ianlopshire/go-ssm-config) [](http://gocover.io/github.com/ianlopshire/go-ssm-config)
`import "github.com/ianlopshire/go-ssm-config"`
SSMConfig is a utility for loading configuration parameters from AWS SSM (Parameter Store) directly into a struct. This
package is largely inspired by [kelseyhightower/envconfig](https://github.com/kelseyhightower/envconfig).
## Motivation
This package was created to reduce the boilerplate code required when using Parameter Store to provide configuration to
AWS Lambda functions. It should be suitable for additional applications.
## Usage
Set some parameters in [AWS Parameter Store](https://docs.aws.amazon.com/systems-manager/latest/userguide/systems-manager-parameter-store.html):
| Name | Value | Type | Key ID |
| ---------------------------- | -------------------- | ------------ | ------------- |
| /exmaple_service/prod/debug | false | String | - |
| /exmaple_service/prod/port | 8080 | String | - |
| /exmaple_service/prod/user | Ian | String | - |
| /exmaple_service/prod/rate | 0.5 | String | - |
| /exmaple_service/prod/secret | zOcZkAGB6aEjN7SAoVBT | SecureString | alias/aws/ssm |
Write some code:
```go
package main
import (
"fmt"
"log"
"time"
ssmconfig "github.com/ianlopshire/go-ssm-config"
)
type Config struct {
Debug bool `ssm:"debug" default:"true"`
Port int `ssm:"port"`
User string `ssm:"user"`
Rate float32 `ssm:"rate"`
Secret string `ssm:"secret" required:"true"`
}
func main() {
var c Config
err := ssmconfig.Process("/example_service/prod/", &c)
if err != nil {
log.Fatal(err.Error())
}
format := "Debug: %v\nPort: %d\nUser: %s\nRate: %f\nSecret: %s\n"
_, err = fmt.Printf(format, c.Debug, c.Port, c.User, c.Rate, c.Secret)
if err != nil {
log.Fatal(err.Error())
}
}
```
Result:
```
Debug: false
Port: 8080
User: Ian
Rate: 0.500000
Secret: zOcZkAGB6aEjN7SAoVBT
```
[Additional examples](https://godoc.org/github.com/ianlopshire/go-ssm-config#pkg-examples) can be found in godoc.
### Struct Tag Support
ssmconfig supports the use of struct tags to specify parameter name, default value, and required parameters.
```go
type Config struct {
Param string `ssm:"param"`
RequiredParam string `ssm:"required_param" required:"true"`
DefaultParam string `ssm:"default_param" default:"foobar"`
}
```
The `ssm` tag is used to lookup the parameter in Parameter Store. It is joined to the base path passed into `Process()`.
If the `ssm` tag is missing ssmconfig will ignore the struct field.
The `default` tag is used to set the default value of a parameter. The default value will only be set if Parameter Store
returns the parameter as invalid.
The `required` tag is used to mark a parameter as required. If Parameter Store returns a required parameter as invalid,
ssmconfig will return an error.
The behavior of using the `default` and `required` tags on the same struct field is currently undefined.
### Supported Struct Field Types
ssmconfig supports these struct field types:
* string
* int, int8, int16, int32, int64
* bool
* float32, float64
More supported types may be added in the future.
## Licence
MIT