133 lines
2.5 KiB
Go
133 lines
2.5 KiB
Go
package mongodb
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import (
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"fmt"
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"strings"
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"sync"
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"time"
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"github.com/hashicorp/vault/logical"
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"github.com/hashicorp/vault/logical/framework"
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"gopkg.in/mgo.v2"
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)
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func Factory(conf *logical.BackendConfig) (logical.Backend, error) {
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return Backend().Setup(conf)
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}
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func Backend() *framework.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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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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pathRoles(&b),
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pathCredsCreate(&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.ResetSession,
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Invalidate: b.invalidate,
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}
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return b.Backend
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}
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type backend struct {
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*framework.Backend
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session *mgo.Session
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lock sync.Mutex
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}
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// Session returns the database connection.
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func (b *backend) Session(s logical.Storage) (*mgo.Session, error) {
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b.lock.Lock()
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defer b.lock.Unlock()
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if b.session != nil {
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if err := b.session.Ping(); err == nil {
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return b.session, nil
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}
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b.session.Close()
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}
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connConfigJSON, err := s.Get("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 connConfigJSON == nil {
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return nil, fmt.Errorf("configure the MongoDB connection with config/connection first")
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}
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var connConfig connectionConfig
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if err := connConfigJSON.DecodeJSON(&connConfig); err != nil {
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return nil, err
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}
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dialInfo, err := parseMongoURI(connConfig.URI)
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if err != nil {
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return nil, err
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}
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b.session, err = mgo.DialWithInfo(dialInfo)
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if err != nil {
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return nil, err
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}
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b.session.SetSyncTimeout(1 * time.Minute)
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b.session.SetSocketTimeout(1 * time.Minute)
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return b.session, nil
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}
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// ResetSession forces creation of a new connection next time Session() is called.
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func (b *backend) ResetSession() {
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b.lock.Lock()
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defer b.lock.Unlock()
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if b.session != nil {
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b.session.Close()
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}
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b.session = nil
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}
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func (b *backend) invalidate(key string) {
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switch key {
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case "config/connection":
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b.ResetSession()
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}
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}
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// LeaseConfig returns the lease configuration
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func (b *backend) LeaseConfig(s logical.Storage) (*configLease, error) {
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entry, err := s.Get("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 mongodb backend dynamically generates MongoDB credentials.
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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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