headscale/db.go
2021-11-14 16:46:09 +01:00

119 lines
2.1 KiB
Go

package headscale
import (
"errors"
"gorm.io/driver/postgres"
"gorm.io/driver/sqlite"
"gorm.io/gorm"
"gorm.io/gorm/logger"
)
const dbVersion = "1"
// KV is a key-value store in a psql table. For future use...
type KV struct {
Key string
Value string
}
func (h *Headscale) initDB() error {
db, err := h.openDB()
if err != nil {
return err
}
h.db = db
if h.dbType == "postgres" {
db.Exec("create extension if not exists \"uuid-ossp\";")
}
err = db.AutoMigrate(&Machine{})
if err != nil {
return err
}
err = db.AutoMigrate(&KV{})
if err != nil {
return err
}
err = db.AutoMigrate(&Namespace{})
if err != nil {
return err
}
err = db.AutoMigrate(&PreAuthKey{})
if err != nil {
return err
}
err = db.AutoMigrate(&SharedMachine{})
if err != nil {
return err
}
err = h.setValue("db_version", dbVersion)
return err
}
func (h *Headscale) openDB() (*gorm.DB, error) {
var db *gorm.DB
var err error
var log logger.Interface
if h.dbDebug {
log = logger.Default
} else {
log = logger.Default.LogMode(logger.Silent)
}
switch h.dbType {
case "sqlite3":
db, err = gorm.Open(sqlite.Open(h.dbString), &gorm.Config{
DisableForeignKeyConstraintWhenMigrating: true,
Logger: log,
})
case "postgres":
db, err = gorm.Open(postgres.Open(h.dbString), &gorm.Config{
DisableForeignKeyConstraintWhenMigrating: true,
Logger: log,
})
}
if err != nil {
return nil, err
}
return db, nil
}
// getValue returns the value for the given key in KV.
func (h *Headscale) getValue(key string) (string, error) {
var row KV
if result := h.db.First(&row, "key = ?", key); errors.Is(
result.Error,
gorm.ErrRecordNotFound,
) {
return "", errors.New("not found")
}
return row.Value, nil
}
// setValue sets value for the given key in KV.
func (h *Headscale) setValue(key string, value string) error {
kv := KV{
Key: key,
Value: value,
}
_, err := h.getValue(key)
if err == nil {
h.db.Model(&kv).Where("key = ?", key).Update("value", value)
return nil
}
h.db.Create(kv)
return nil
}