add proxy arguments for provider

mysql/provider.go

@@ -4,6 +4,8 @@ import (
 	"database/sql"
 	"fmt"
 	"net"
+	"net/url"
+	"regexp"
 	"strings"
 	"time"
 
@@ -53,6 +55,12 @@ func Provider() terraform.ResourceProvider {
 				DefaultFunc: schema.EnvDefaultFunc("MYSQL_PASSWORD", nil),
 			},
 
+			"proxy": {
+				Type:         schema.TypeString,
+				Optional:     true,
+				ValidateFunc: validation.StringMatch(regexp.MustCompile("^socks5h?://.*:\\d+$"), "The proxy URL is not a valid socks url."),
+			},
+
 			"tls": {
 				Type:        schema.TypeString,
 				Optional:    true,
@@ -105,7 +113,11 @@ func providerConfigure(d *schema.ResourceData) (interface{}, error) {
 		AllowNativePasswords: true,
 	}
 
-	dialer := proxy.FromEnvironment()
+	dialer, err := getDialerFromArgOrFromEnv(d)
+	if err != nil {
+		return nil, err
+	}
+
 	mysql.RegisterDial("tcp", func(network string) (net.Conn, error) {
 		return dialer.Dial("tcp", network)
 	})
@@ -119,6 +131,26 @@ func providerConfigure(d *schema.ResourceData) (interface{}, error) {
 
 var identQuoteReplacer = strings.NewReplacer("`", "``")
 
+func getDialerFromArgOrFromEnv(d *schema.ResourceData) (proxy.Dialer, error) {
+	proxyFromEnv := proxy.FromEnvironment()
+	proxyArg := d.Get("proxy").(string)
+
+	if len(proxyArg) > 0 {
+		proxyURL, err := url.Parse(proxyArg)
+		if err != nil {
+			return nil, err
+		}
+		proxy, err := proxy.FromURL(proxyURL, proxyFromEnv)
+		if err != nil {
+			return nil, err
+		}
+
+		return proxy, nil
+	}
+
+	return proxyFromEnv, nil
+}
+
 func quoteIdentifier(in string) string {
 	return fmt.Sprintf("`%s`", identQuoteReplacer.Replace(in))
 }

website/docs/index.html.markdown

@@ -79,6 +79,7 @@ The following arguments are supported:
 * `endpoint` - (Required) The address of the MySQL server to use. Most often a "hostname:port" pair, but may also be an absolute path to a Unix socket when the host OS is Unix-compatible. Can also be sourced from the `MYSQL_ENDPOINT` environment variable.
 * `username` - (Required) Username to use to authenticate with the server, can also be sourced from the `MYSQL_USERNAME` environment variable.
 * `password` - (Optional) Password for the given user, if that user has a password, can also be sourced from the `MYSQL_PASSWORD` environment variable.
+* `proxy` - (Optional) Proxy socks url. This superseed `ALL_PROXY` and/or `all_proxy` environment variables.
 * `tls` - (Optional) The TLS configuration. One of `false`, `true`, or `skip-verify`. Defaults to `false`. Can also be sourced from the `MYSQL_TLS_CONFIG` environment variable.
 * `max_conn_lifetime_sec` - (Optional) Sets the maximum amount of time a connection may be reused. If d <= 0, connections are reused forever.
 * `max_open_conns` - (Optional) Sets the maximum number of open connections to the database. If n <= 0, then there is no limit on the number of open connections.