64 lines
1.6 KiB
Go
64 lines
1.6 KiB
Go
package export
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import (
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"context"
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"fmt"
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"time"
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"github.com/aws/aws-sdk-go-v2/aws"
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"github.com/aws/aws-sdk-go-v2/service/s3"
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"github.com/aws/aws-sdk-go-v2/service/ssm"
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)
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type Config struct {
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S3Bucket string
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Region string
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}
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type Client struct {
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s3 *s3.Client
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ssm *ssm.Client
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cfg Config
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}
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func NewClient(awsCfg aws.Config, cfg Config) *Client {
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return &Client{
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s3: s3.NewFromConfig(awsCfg),
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ssm: ssm.NewFromConfig(awsCfg),
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cfg: cfg,
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}
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}
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// Export dumps the customer's Postgres DB and files, uploads to S3,
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// and returns a pre-signed download URL valid for 24 hours.
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func (c *Client) Export(ctx context.Context, instanceID, slug string) (string, error) {
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key := fmt.Sprintf("exports/%s-%d.tar.gz", slug, time.Now().Unix())
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// Run export script on the EC2 via SSM
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script := fmt.Sprintf(`
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pg_dump crimata > /tmp/crimata.sql
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tar -czf /tmp/export.tar.gz /tmp/crimata.sql /opt/crimata/data
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aws s3 cp /tmp/export.tar.gz s3://%s/%s
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`, c.cfg.S3Bucket, key)
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_, err := c.ssm.SendCommand(ctx, &ssm.SendCommandInput{
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InstanceIds: []string{instanceID},
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DocumentName: aws.String("AWS-RunShellScript"),
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Parameters: map[string][]string{"commands": {script}},
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})
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if err != nil {
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return "", fmt.Errorf("export script: %w", err)
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}
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// Generate pre-signed URL valid for 24 hours
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presigner := s3.NewPresignClient(c.s3)
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req, err := presigner.PresignGetObject(ctx, &s3.GetObjectInput{
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Bucket: aws.String(c.cfg.S3Bucket),
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Key: aws.String(key),
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}, s3.WithPresignExpires(24*time.Hour))
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if err != nil {
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return "", fmt.Errorf("presign: %w", err)
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}
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return req.URL, nil
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}
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