terraform/backend/remote-state/etcdv2/client.go

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package etcdv2
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import (
"context"
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"crypto/md5"
"fmt"
etcdapi "github.com/coreos/etcd/client"
"github.com/hashicorp/terraform/state/remote"
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)
// EtcdClient is a remote client that stores data in etcd.
type EtcdClient struct {
Client etcdapi.Client
Path string
}
func (c *EtcdClient) Get() (*remote.Payload, error) {
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resp, err := etcdapi.NewKeysAPI(c.Client).Get(context.Background(), c.Path, &etcdapi.GetOptions{Quorum: true})
if err != nil {
if err, ok := err.(etcdapi.Error); ok && err.Code == etcdapi.ErrorCodeKeyNotFound {
return nil, nil
}
return nil, err
}
if resp.Node.Dir {
return nil, fmt.Errorf("path is a directory")
}
data := []byte(resp.Node.Value)
md5 := md5.Sum(data)
return &remote.Payload{
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Data: data,
MD5: md5[:],
}, nil
}
func (c *EtcdClient) Put(data []byte) error {
_, err := etcdapi.NewKeysAPI(c.Client).Set(context.Background(), c.Path, string(data), nil)
return err
}
func (c *EtcdClient) Delete() error {
_, err := etcdapi.NewKeysAPI(c.Client).Delete(context.Background(), c.Path, nil)
return err
}