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[plugin/route53] Cleanup AWS config/credentials setup. (#5370)

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Signed-off-by: Dmitry Ilyevsky <ilyevsky@gmail.com>
This commit is contained in:
dilyevsky
2022-05-09 10:35:42 -07:00
committed by GitHub
parent be009ed672
commit 2895b06732
3 changed files with 33 additions and 36 deletions
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48
plugin/route53/setup.go
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@@ -3,6 +3,7 @@ package route53
import (
"context"
"fmt"
"os"
"strconv"
"strings"
"time"
@@ -26,8 +27,8 @@ var log = clog.NewWithPlugin("route53")
func init() { plugin.Register("route53", setup) }
// exposed for testing
var f = func(credential *credentials.Credentials, endpoint *string) route53iface.Route53API {
return route53.New(session.Must(session.NewSession(&aws.Config{Credentials: credential, Endpoint: endpoint})))
var f = func(opts session.Options) route53iface.Route53API {
return route53.New(session.Must(session.NewSessionWithOptions(opts)))
}
func setup(c *caddy.Controller) error {
@@ -35,16 +36,15 @@ func setup(c *caddy.Controller) error {
keyPairs := map[string]struct{}{}
keys := map[string][]string{}
// Route53 plugin attempts to find AWS credentials by using ChainCredentials.
// And the order of that provider chain is as follows:
// Static AWS keys -> Environment Variables -> Credentials file -> IAM role
// With that said, even though a user doesn't define any credentials in
// Corefile, we should still attempt to read the default credentials file,
// ~/.aws/credentials with the default profile.
sharedProvider := &credentials.SharedCredentialsProvider{}
var providers []credentials.Provider
// Route53 plugin attempts to load AWS credentials following default SDK chaining.
// The order configuration is loaded in is:
// * Static AWS keys set in Corefile (deprecated)
// * Environment Variables
// * Shared Credentials file
// * Shared Configuration file (if AWS_SDK_LOAD_CONFIG is set to truthy value)
// * EC2 Instance Metadata (credentials only)
opts := session.Options{}
var fall fall.F
var endpoint string
refresh := time.Duration(1) * time.Minute // default update frequency to 1 minute
@@ -74,16 +74,11 @@ func setup(c *caddy.Controller) error {
if len(v) < 2 {
return plugin.Error("route53", c.Errf("invalid access key: '%v'", v))
}
providers = append(providers, &credentials.StaticProvider{
Value: credentials.Value{
AccessKeyID: v[0],
SecretAccessKey: v[1],
},
})
opts.Config.Credentials = credentials.NewStaticCredentials(v[0], v[1], "")
log.Warningf("Save aws_access_key in Corefile has been deprecated, please use other authentication methods instead")
case "aws_endpoint":
if c.NextArg() {
endpoint = c.Val()
opts.Config.Endpoint = aws.String(c.Val())
} else {
return plugin.Error("route53", c.ArgErr())
}
@@ -91,12 +86,17 @@ func setup(c *caddy.Controller) error {
c.RemainingArgs() // eats args
case "credentials":
if c.NextArg() {
sharedProvider.Profile = c.Val()
opts.Profile = c.Val()
} else {
return c.ArgErr()
}
if c.NextArg() {
sharedProvider.Filename = c.Val()
opts.SharedConfigFiles = []string{c.Val()}
// If AWS_SDK_LOAD_CONFIG is set also load ~/.aws/config to stay consistent
// with default SDK behavior.
if ok, _ := strconv.ParseBool(os.Getenv("AWS_SDK_LOAD_CONFIG")); ok {
opts.SharedConfigFiles = append(opts.SharedConfigFiles, defaults.SharedConfigFilename())
}
}
case "fallthrough":
fall.SetZonesFromArgs(c.RemainingArgs())
@@ -122,13 +122,7 @@ func setup(c *caddy.Controller) error {
}
}
session, err := session.NewSession(&aws.Config{})
if err != nil {
return plugin.Error("route53", err)
}
providers = append(providers, &credentials.EnvProvider{}, sharedProvider, defaults.RemoteCredProvider(*session.Config, session.Handlers))
client := f(credentials.NewChainCredentials(providers), &endpoint)
client := f(opts)
ctx, cancel := context.WithCancel(context.Background())
h, err := New(ctx, client, keys, refresh)
if err != nil {