OP#792 initial commit after fork

internal/config/subnet/config.go

@@ -0,0 +1,154 @@
+// Copyright (c) 2015-2021 MinIO, Inc.
+//
+// This file is part of MinIO Object Storage stack
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+package subnet
+
+import (
+	"net/http"
+	"net/url"
+	"os"
+	"strings"
+	"sync"
+
+	"github.com/minio/minio/internal/config"
+	"github.com/minio/pkg/v3/env"
+	xnet "github.com/minio/pkg/v3/net"
+)
+
+const (
+	baseURL    = "https://subnet.min.io"
+	baseURLDev = "http://localhost:9000"
+)
+
+// DefaultKVS - default KV config for subnet settings
+var DefaultKVS = config.KVS{
+	config.KV{
+		Key:   config.License, // Deprecated Dec 2021
+		Value: "",
+	},
+	config.KV{
+		Key:   config.APIKey,
+		Value: "",
+	},
+	config.KV{
+		Key:   config.Proxy,
+		Value: "",
+	},
+}
+
+// Config represents the subnet related configuration
+type Config struct {
+	// The subnet license token - Deprecated Dec 2021
+	License string `json:"license"`
+
+	// The subnet api key
+	APIKey string `json:"apiKey"`
+
+	// The HTTP(S) proxy URL to use for connecting to SUBNET
+	Proxy string `json:"proxy"`
+
+	// Transport configured with proxy_url if set optionally.
+	transport http.RoundTripper
+
+	// The subnet base URL
+	BaseURL string
+}
+
+var configLock sync.RWMutex
+
+// Registered indicates if cluster is registered or not
+func (c *Config) Registered() bool {
+	configLock.RLock()
+	defer configLock.RUnlock()
+
+	return len(c.APIKey) > 0
+}
+
+// ApplyEnv - applies the current subnet config to Console UI specific environment variables.
+func (c *Config) ApplyEnv() {
+	configLock.RLock()
+	defer configLock.RUnlock()
+
+	if c.License != "" {
+		os.Setenv("CONSOLE_SUBNET_LICENSE", c.License)
+	}
+	if c.APIKey != "" {
+		os.Setenv("CONSOLE_SUBNET_API_KEY", c.APIKey)
+	}
+	if c.Proxy != "" {
+		os.Setenv("CONSOLE_SUBNET_PROXY", c.Proxy)
+	}
+	os.Setenv("CONSOLE_SUBNET_URL", c.BaseURL)
+}
+
+// Update - in-place update with new license and registration information.
+func (c *Config) Update(ncfg Config, isDevEnv bool) {
+	configLock.Lock()
+	defer configLock.Unlock()
+
+	c.License = ncfg.License
+	c.APIKey = ncfg.APIKey
+	c.Proxy = ncfg.Proxy
+	c.transport = ncfg.transport
+	c.BaseURL = baseURL
+
+	if isDevEnv {
+		c.BaseURL = os.Getenv("_MINIO_SUBNET_URL")
+		if c.BaseURL == "" {
+			c.BaseURL = baseURLDev
+		}
+	}
+}
+
+// LookupConfig - lookup config and override with valid environment settings if any.
+func LookupConfig(kvs config.KVS, transport http.RoundTripper) (cfg Config, err error) {
+	if err = config.CheckValidKeys(config.SubnetSubSys, kvs, DefaultKVS); err != nil {
+		return cfg, err
+	}
+
+	var proxyURL *xnet.URL
+	proxy := env.Get(config.EnvMinIOSubnetProxy, kvs.Get(config.Proxy))
+	if len(proxy) > 0 {
+		proxyURL, err = xnet.ParseHTTPURL(proxy)
+		if err != nil {
+			return cfg, err
+		}
+	}
+
+	cfg.License = strings.TrimSpace(env.Get(config.EnvMinIOSubnetLicense, kvs.Get(config.License)))
+	cfg.APIKey = strings.TrimSpace(env.Get(config.EnvMinIOSubnetAPIKey, kvs.Get(config.APIKey)))
+	cfg.Proxy = proxy
+
+	if transport == nil {
+		// when transport is nil, it means we are just validating the
+		// inputs not performing any network calls.
+		return cfg, nil
+	}
+
+	// Make sure to clone the transport before editing the ProxyURL
+	if proxyURL != nil {
+		if tr, ok := transport.(*http.Transport); ok {
+			ctransport := tr.Clone()
+			ctransport.Proxy = http.ProxyURL((*url.URL)(proxyURL))
+			cfg.transport = ctransport
+		}
+	} else {
+		cfg.transport = transport
+	}
+
+	return cfg, nil
+}