feature: dfdaemon supports proxing https registries

Signed-off-by: lowzj <[email protected]>

dfdaemon/config/config.go

@@ -0,0 +1,72 @@
+/*
+ * Copyright The Dragonfly Authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package config
+
+import (
+	"fmt"
+	"io/ioutil"
+
+	"gopkg.in/yaml.v2"
+)
+
+// -----------------------------------------------------------------------------
+// Properties
+
+// Properties holds all configurable properties of dfdaemon.
+// The default path is '/etc/dragonfly/dfdaemon.yml'
+type Properties struct {
+	Registries []Registry `yaml:"registries"`
+}
+
+// Load loads properties from config file.
+func (p *Properties) Load(path string) error {
+	return p.loadFromYaml(path)
+}
+
+func (p *Properties) loadFromYaml(path string) error {
+	yamlFile, err := ioutil.ReadFile(path)
+	if err != nil {
+		return fmt.Errorf("read yaml config from %s error: %v", path, err)
+	}
+	err = yaml.Unmarshal(yamlFile, p)
+	if err != nil {
+		return fmt.Errorf("unmarshal yaml error:%v", err)
+	}
+	return nil
+}
+
+// -----------------------------------------------------------------------------
+// Registry
+
+type Registry struct {
+	// Match is a regular expression, dfdaemon use this registry to process the
+	// matched requests.
+	Match  string `yaml:"match"`
+
+	// Schema only can be 'http' or 'https'.
+	Schema string `yaml:"schema"`
+
+	// Host is the host of proxied registry, including ip and port.
+	Host   string `yaml:"host"`
+
+	// Cert is the path of server-side certification. It should be provided when
+	// the 'Schema' is 'https' and the dfdaemon is worked on proxy pattern and
+	// the proxied registry is self-certificated.
+	// The server-side certification could be get from the following command:
+	// openssl x509 -in <(openssl s_client -showcerts -servername xxx -connect xxx:443 -prexit 2>/dev/null)
+	Cert   string `yaml:"cert"`
+}