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examples: Add Golang code showing object upload to Ceph RGW bucket
Signed-off-by: faithuniterh <faithuniterh@tutanota.com>
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faithuniterh
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16
examples/golang/README.md
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16
examples/golang/README.md
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# Introduction
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This directory contains Golang code examples on how to upload an object to an S3 bucket running on a Ceph RGW cluster.
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# Prerequisite
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Linux machine running an RGW Ceph cluster. Preferrably started with the ``OSD=1 MON=1 MDS=0 MGR=0 RGW=1 ../src/vstart.sh --debug --new `` command.
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Go installed on the Linux machine.
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## Workflow Procedure
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1. Install AWS CLI version one on your Linux machine as explained [here](https://docs.aws.amazon.com/cli/v1/userguide/install-linux.html)
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2. Create a bucket on the Ceph cluster with the command
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```
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aws --endpoint-url http://localhost:8000 s3 mb s3://sample-bucket
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```
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3. Navigate through your file system to where the Go example code is using your terminal.
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4. Run ``` go mod tidy ``` to install the required Go packages on the system.
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5. Run the Go program as ``` go run object-upload.go sample-bucket fortuna.txt ``` on the terminal window to test out object upload to Ceph RGW cluster.
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1
examples/golang/fortuna.txt
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examples/golang/fortuna.txt
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This file is being used to test Go upload capabilities to Ceph RGW cluster.
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5
examples/golang/go.mod
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5
examples/golang/go.mod
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module ceph/object-upload
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go 1.13
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require github.com/aws/aws-sdk-go v1.43.41
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examples/golang/go.sum
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examples/golang/go.sum
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github.com/aws/aws-sdk-go v1.43.41 h1:HaazVplP8/t6SOfybQlNUmjAxLWDKdLdX8BSEHFlJdY=
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github.com/aws/aws-sdk-go v1.43.41/go.mod h1:y4AeaBuwd2Lk+GepC1E9v0qOiTws0MIWAX4oIKwKHZo=
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github.com/davecgh/go-spew v1.1.0 h1:ZDRjVQ15GmhC3fiQ8ni8+OwkZQO4DARzQgrnXU1Liz8=
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github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
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github.com/jmespath/go-jmespath v0.4.0 h1:BEgLn5cpjn8UN1mAw4NjwDrS35OdebyEtFe+9YPoQUg=
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github.com/jmespath/go-jmespath v0.4.0/go.mod h1:T8mJZnbsbmF+m6zOOFylbeCJqk5+pHWvzYPziyZiYoo=
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github.com/jmespath/go-jmespath/internal/testify v1.5.1 h1:shLQSRRSCCPj3f2gpwzGwWFoC7ycTf1rcQZHOlsJ6N8=
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github.com/jmespath/go-jmespath/internal/testify v1.5.1/go.mod h1:L3OGu8Wl2/fWfCI6z80xFu9LTZmf1ZRjMHUOPmWr69U=
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github.com/pkg/errors v0.9.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
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github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
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github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
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github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
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golang.org/x/net v0.0.0-20220127200216-cd36cc0744dd h1:O7DYs+zxREGLKzKoMQrtrEacpb0ZVXA5rIwylE2Xchk=
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golang.org/x/net v0.0.0-20220127200216-cd36cc0744dd/go.mod h1:CfG3xpIq0wQ8r1q4Su4UZFWDARRcnwPjda9FqA0JpMk=
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golang.org/x/sys v0.0.0-20210615035016-665e8c7367d1/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
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golang.org/x/sys v0.0.0-20211216021012-1d35b9e2eb4e/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
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golang.org/x/term v0.0.0-20210927222741-03fcf44c2211/go.mod h1:jbD1KX2456YbFQfuXm/mYQcufACuNUgVhRMnK/tPxf8=
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golang.org/x/text v0.3.7 h1:olpwvP2KacW1ZWvsR7uQhoyTYvKAupfQrRGBFM352Gk=
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golang.org/x/text v0.3.7/go.mod h1:u+2+/6zg+i71rQMx5EYifcz6MCKuco9NR6JIITiCfzQ=
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golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
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gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
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gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
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gopkg.in/yaml.v2 v2.2.8 h1:obN1ZagJSUGI0Ek/LBmuj4SNLPfIny3KsKFopxRdj10=
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gopkg.in/yaml.v2 v2.2.8/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
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69
examples/golang/object-upload.go
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examples/golang/object-upload.go
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package main
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import (
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"fmt"
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"github.com/aws/aws-sdk-go/aws"
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"github.com/aws/aws-sdk-go/aws/credentials"
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"github.com/aws/aws-sdk-go/aws/endpoints"
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"github.com/aws/aws-sdk-go/aws/session"
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"github.com/aws/aws-sdk-go/service/s3/s3manager"
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"os"
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)
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func main() {
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if len(os.Args) != 3 {
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exitErrorf("bucket and file name required\nUsage: %s bucket_name filename",
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os.Args[0])
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}
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bucket := os.Args[1]
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filename := os.Args[2]
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file, err := os.Open(filename)
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if err != nil {
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exitErrorf("Unable to open file %q, %v", filename, err)
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}
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defer file.Close()
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defaultResolver := endpoints.DefaultResolver()
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s3CustResolverFn := func(service, region string, optFns ...func(*endpoints.Options)) (endpoints.ResolvedEndpoint, error) {
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if service == "s3" {
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return endpoints.ResolvedEndpoint{
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URL: "http://127.0.0.1:8000", //Variable substituing endpoint-url
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}, nil
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}
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return defaultResolver.EndpointFor(service, region, optFns...)
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}
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sess := session.Must(session.NewSessionWithOptions(session.Options{
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Config: aws.Config{
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Region: aws.String("default"),
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Credentials: credentials.NewStaticCredentials("0555b35654ad1656d804", "h7GhxuBLTrlhVUyxSPUKUV8r/2EI4ngqJxD7iBdBYLhwluN30JaT3Q==", ""),
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S3ForcePathStyle: aws.Bool(true),
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EndpointResolver: endpoints.ResolverFunc(s3CustResolverFn),
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},
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}))
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uploader := s3manager.NewUploader(sess)
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// Upload the file's body to S3 bucket as an object with the key being the
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// same as the filename.
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_, err = uploader.Upload(&s3manager.UploadInput{
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Bucket: aws.String(bucket),
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Key: aws.String(filename),
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Body: file,
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})
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if err != nil {
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exitErrorf("Unable to upload %q to %q, %v", filename, bucket, err)
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}
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fmt.Printf("Successfully uploaded %q to %q\n", filename, bucket)
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}
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func exitErrorf(msg string, args ...interface{}) {
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fmt.Fprintf(os.Stderr, msg+"\n", args...)
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os.Exit(1)
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}
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