146 lines
3 KiB
Go
146 lines
3 KiB
Go
package rabbitmq
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import (
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"context"
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"fmt"
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"strings"
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"sync"
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cleanhttp "github.com/hashicorp/go-cleanhttp"
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"github.com/hashicorp/vault/sdk/framework"
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"github.com/hashicorp/vault/sdk/logical"
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rabbithole "github.com/michaelklishin/rabbit-hole"
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)
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// Factory creates and configures the backend
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func Factory(ctx context.Context, conf *logical.BackendConfig) (logical.Backend, error) {
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b := Backend()
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if err := b.Setup(ctx, conf); err != nil {
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return nil, err
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}
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return b, nil
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}
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// Creates a new backend with all the paths and secrets belonging to it
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func Backend() *backend {
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var b backend
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b.Backend = &framework.Backend{
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Help: strings.TrimSpace(backendHelp),
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PathsSpecial: &logical.Paths{
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SealWrapStorage: []string{
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"config/connection",
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},
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},
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Paths: []*framework.Path{
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pathConfigConnection(&b),
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pathConfigLease(&b),
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pathListRoles(&b),
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pathCreds(&b),
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pathRoles(&b),
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},
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Secrets: []*framework.Secret{
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secretCreds(&b),
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},
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Clean: b.resetClient,
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Invalidate: b.invalidate,
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BackendType: logical.TypeLogical,
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}
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return &b
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}
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type backend struct {
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*framework.Backend
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client *rabbithole.Client
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lock sync.RWMutex
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}
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// DB returns the database connection.
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func (b *backend) Client(ctx context.Context, s logical.Storage) (*rabbithole.Client, error) {
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b.lock.RLock()
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// If we already have a client, return it
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if b.client != nil {
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b.lock.RUnlock()
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return b.client, nil
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}
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b.lock.RUnlock()
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// Otherwise, attempt to make connection
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entry, err := s.Get(ctx, "config/connection")
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if err != nil {
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return nil, err
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}
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if entry == nil {
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return nil, fmt.Errorf("configure the client connection with config/connection first")
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}
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var connConfig connectionConfig
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if err := entry.DecodeJSON(&connConfig); err != nil {
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return nil, err
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}
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b.lock.Lock()
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defer b.lock.Unlock()
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// If the client was created during the lock switch, return it
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if b.client != nil {
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return b.client, nil
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}
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b.client, err = rabbithole.NewClient(connConfig.URI, connConfig.Username, connConfig.Password)
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if err != nil {
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return nil, err
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}
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// Use a default pooled transport so there would be no leaked file descriptors
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b.client.SetTransport(cleanhttp.DefaultPooledTransport())
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return b.client, nil
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}
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// resetClient forces a connection next time Client() is called.
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func (b *backend) resetClient(_ context.Context) {
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b.lock.Lock()
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defer b.lock.Unlock()
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b.client = nil
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}
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func (b *backend) invalidate(ctx context.Context, key string) {
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switch key {
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case "config/connection":
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b.resetClient(ctx)
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}
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}
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// Lease returns the lease information
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func (b *backend) Lease(ctx context.Context, s logical.Storage) (*configLease, error) {
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entry, err := s.Get(ctx, "config/lease")
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if err != nil {
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return nil, err
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}
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if entry == nil {
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return nil, nil
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}
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var result configLease
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if err := entry.DecodeJSON(&result); err != nil {
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return nil, err
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}
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return &result, nil
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}
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const backendHelp = `
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The RabbitMQ backend dynamically generates RabbitMQ users.
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After mounting this backend, configure it using the endpoints within
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the "config/" path.
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`
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