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dex/storage/ent/postgres.go

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package ent
import (
"context"
"crypto/sha256"
"database/sql"
"fmt"
"net"
"regexp"
"strconv"
"strings"
"time"
entSQL "entgo.io/ent/dialect/sql"
_ "github.com/lib/pq" // Register postgres driver.
"github.com/dexidp/dex/pkg/log"
"github.com/dexidp/dex/storage"
"github.com/dexidp/dex/storage/ent/client"
"github.com/dexidp/dex/storage/ent/db"
)
// nolint
const (
// postgres SSL modes
pgSSLDisable = "disable"
pgSSLRequire = "require"
pgSSLVerifyCA = "verify-ca"
pgSSLVerifyFull = "verify-full"
)
// Postgres options for creating an SQL db.
type Postgres struct {
NetworkDB
SSL SSL `json:"ssl"`
}
// Open always returns a new in sqlite3 storage.
func (p *Postgres) Open(logger log.Logger) (storage.Storage, error) {
logger.Debug("experimental ent-based storage driver is enabled")
drv, err := p.driver()
if err != nil {
return nil, err
}
databaseClient := client.NewDatabase(
client.WithClient(db.NewClient(db.Driver(drv))),
client.WithHasher(sha256.New),
// The default behavior for Postgres transactions is consistent reads, not consistent writes.
// For each transaction opened, ensure it has the correct isolation level.
//
// See: https://www.postgresql.org/docs/9.3/static/sql-set-transaction.html
client.WithTxIsolationLevel(sql.LevelSerializable),
)
if err := databaseClient.Schema().Create(context.TODO()); err != nil {
return nil, err
}
return databaseClient, nil
}
func (p *Postgres) driver() (*entSQL.Driver, error) {
drv, err := entSQL.Open("postgres", p.dsn())
if err != nil {
return nil, err
}
// set database/sql tunables if configured
if p.ConnMaxLifetime != 0 {
drv.DB().SetConnMaxLifetime(time.Duration(p.ConnMaxLifetime) * time.Second)
}
if p.MaxIdleConns == 0 {
drv.DB().SetMaxIdleConns(5)
} else {
drv.DB().SetMaxIdleConns(p.MaxIdleConns)
}
if p.MaxOpenConns == 0 {
drv.DB().SetMaxOpenConns(5)
} else {
drv.DB().SetMaxOpenConns(p.MaxOpenConns)
}
return drv, nil
}
func (p *Postgres) dsn() string {
// detect host:port for backwards-compatibility
host, port, err := net.SplitHostPort(p.Host)
if err != nil {
// not host:port, probably unix socket or bare address
host = p.Host
if p.Port != 0 {
port = strconv.Itoa(int(p.Port))
}
}
var parameters []string
addParam := func(key, val string) {
parameters = append(parameters, fmt.Sprintf("%s=%s", key, val))
}
addParam("connect_timeout", strconv.Itoa(p.ConnectionTimeout))
if host != "" {
addParam("host", dataSourceStr(host))
}
if port != "" {
addParam("port", port)
}
if p.User != "" {
addParam("user", dataSourceStr(p.User))
}
if p.Password != "" {
addParam("password", dataSourceStr(p.Password))
}
if p.Database != "" {
addParam("dbname", dataSourceStr(p.Database))
}
if p.SSL.Mode == "" {
// Assume the strictest mode if unspecified.
addParam("sslmode", dataSourceStr(pgSSLVerifyFull))
} else {
addParam("sslmode", dataSourceStr(p.SSL.Mode))
}
if p.SSL.CAFile != "" {
addParam("sslrootcert", dataSourceStr(p.SSL.CAFile))
}
if p.SSL.CertFile != "" {
addParam("sslcert", dataSourceStr(p.SSL.CertFile))
}
if p.SSL.KeyFile != "" {
addParam("sslkey", dataSourceStr(p.SSL.KeyFile))
}
return strings.Join(parameters, " ")
}
var strEsc = regexp.MustCompile(`([\\'])`)
func dataSourceStr(str string) string {
return "'" + strEsc.ReplaceAllString(str, `\$1`) + "'"
}