agent/template: add static_secret_render_interval configurable (#11934)

* agent/template: add default_lease_duration config

* go mod tidy

* Add changelog

* Fix panic

* Add documentation

* Change to static_secret_render_interval

* Update doc

* Update command/agent/template/template.go

Co-authored-by: Theron Voran <tvoran@users.noreply.github.com>

* Update changelog/11934.txt

Co-authored-by: Theron Voran <tvoran@users.noreply.github.com>

* Update website/content/docs/agent/template-config.mdx

Co-authored-by: Theron Voran <tvoran@users.noreply.github.com>

Co-authored-by: Theron Voran <tvoran@users.noreply.github.com>

changelog/11934.txt

@@ -0,0 +1,3 @@
+```release-note:improvement
+agent/template: Added static_secret_render_interval to specify how often to fetch non-leased secrets
+```

command/agent/config/config.go

@@ -120,6 +120,8 @@ type Sink struct {
 // TemplateConfig defines global behaviors around template
 type TemplateConfig struct {
 	ExitOnRetryFailure       bool          `hcl:"exit_on_retry_failure"`
+	StaticSecretRenderIntRaw interface{}   `hcl:"static_secret_render_interval"`
+	StaticSecretRenderInt    time.Duration `hcl:"-"`
 }
 
 func NewConfig() *Config {
@@ -585,6 +587,14 @@ func parseTemplateConfig(result *Config, list *ast.ObjectList) error {
 
 	result.TemplateConfig = &cfg
 
+	if result.TemplateConfig.StaticSecretRenderIntRaw != nil {
+		var err error
+		if result.TemplateConfig.StaticSecretRenderInt, err = parseutil.ParseDurationSecond(result.TemplateConfig.StaticSecretRenderIntRaw); err != nil {
+			return err
+		}
+		result.TemplateConfig.StaticSecretRenderIntRaw = nil
+	}
+
 	return nil
 }
 

command/agent/config/config_test.go

@@ -545,6 +545,7 @@ func TestLoadConfigFile_TemplateConfig(t *testing.T) {
 			"./test-fixtures/config-template_config.hcl",
 			TemplateConfig{
 				ExitOnRetryFailure:    true,
+				StaticSecretRenderInt: 1 * time.Minute,
 			},
 		},
 		"empty": {

command/agent/config/test-fixtures/config-template_config.hcl

@@ -7,6 +7,7 @@ vault {
 
 template_config {
   exit_on_retry_failure = true
+  static_secret_render_interval = 60
 }
 
 template {

command/agent/template/template.go

@@ -240,6 +240,10 @@ func newRunnerConfig(sc *ServerConfig, templates ctconfig.TemplateConfigs) (*ctc
 		conf.Vault.Namespace = &sc.Namespace
 	}
 
+	if sc.AgentConfig.TemplateConfig != nil && sc.AgentConfig.TemplateConfig.StaticSecretRenderInt != 0 {
+		conf.Vault.DefaultLeaseDuration = &sc.AgentConfig.TemplateConfig.StaticSecretRenderInt
+	}
+
 	conf.Vault.SSL = &ctconfig.SSLConfig{
 		Enabled:    pointerutil.BoolPtr(false),
 		Verify:     pointerutil.BoolPtr(false),

go.sum

@@ -113,7 +113,6 @@ github.com/Jeffail/gabs v1.1.1/go.mod h1:6xMvQMK4k33lb7GUUpaAPh6nKMmemQeg5d4gn7/
 github.com/Knetic/govaluate v3.0.1-0.20171022003610-9aa49832a739+incompatible/go.mod h1:r7JcOSlj0wfOMncg0iLm8Leh48TZaKVeNIfJntJ2wa0=
 github.com/Masterminds/goutils v1.1.0 h1:zukEsf/1JZwCMgHiK3GZftabmxiCw4apj3a28RPBiVg=
 github.com/Masterminds/goutils v1.1.0/go.mod h1:8cTjp+g8YejhMuvIA5y2vz3BpJxksy863GQaJW2MFNU=
-github.com/Masterminds/semver v1.4.2 h1:WBLTQ37jOCzSLtXNdoo8bNM8876KhNqOKvrlGITgsTc=
 github.com/Masterminds/semver v1.4.2/go.mod h1:MB6lktGJrhw8PrUyiEoblNEGEQ+RzHPF078ddwwvV3Y=
 github.com/Masterminds/semver v1.5.0 h1:H65muMkzWKEuNDnfl9d70GUjFniHKHRbFPGBuZ3QEww=
 github.com/Masterminds/semver v1.5.0/go.mod h1:MB6lktGJrhw8PrUyiEoblNEGEQ+RzHPF078ddwwvV3Y=
@@ -517,7 +516,6 @@ github.com/google/pprof v0.0.0-20200212024743-f11f1df84d12/go.mod h1:ZgVRPoUq/hf
 github.com/google/pprof v0.0.0-20200229191704-1ebb73c60ed3/go.mod h1:ZgVRPoUq/hfqzAqh7sHMqb3I9Rq5C59dIz2SbBwJ4eM=
 github.com/google/renameio v0.1.0/go.mod h1:KWCgfxg9yswjAJkECMjeO8J8rahYeXnNhOm40UhjYkI=
 github.com/google/uuid v1.0.0/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
-github.com/google/uuid v1.1.1 h1:Gkbcsh/GbpXz7lPftLA3P6TYMwjCLYm83jiFQZF/3gY=
 github.com/google/uuid v1.1.1/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
 github.com/google/uuid v1.1.2 h1:EVhdT+1Kseyi1/pUmXKaFxYsDNy9RQYkMWRH68J/W7Y=
 github.com/google/uuid v1.1.2/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
@@ -744,7 +742,6 @@ github.com/huaweicloud/golangsdk v0.0.0-20200304081349-45ec0797f2a4/go.mod h1:WQ
 github.com/hudl/fargo v1.3.0/go.mod h1:y3CKSmjA+wD2gak7sUSXTAoopbhU08POFhmITJgmKTg=
 github.com/ianlancetaylor/demangle v0.0.0-20181102032728-5e5cf60278f6/go.mod h1:aSSvb/t6k1mPoxDqO4vJh6VOCGPwU4O0C2/Eqndh1Sc=
 github.com/imdario/mergo v0.3.5/go.mod h1:2EnlNZ0deacrJVfApfmtdGgDfMuh/nq6Ok1EcJh5FfA=
-github.com/imdario/mergo v0.3.6 h1:xTNEAn+kxVO7dTZGu0CegyqKZmoWFI0rF8UxjlB2d28=
 github.com/imdario/mergo v0.3.6/go.mod h1:2EnlNZ0deacrJVfApfmtdGgDfMuh/nq6Ok1EcJh5FfA=
 github.com/imdario/mergo v0.3.11 h1:3tnifQM4i+fbajXKBHXWEH+KvNHqojZ778UH75j3bGA=
 github.com/imdario/mergo v0.3.11/go.mod h1:jmQim1M+e3UYxmgPu/WyfjB3N3VflVyUjjjwH0dnCYA=
@@ -882,8 +879,6 @@ github.com/miekg/dns v1.1.40 h1:pyyPFfGMnciYUk/mXpKkVmeMQjfXqt3FAJ2hy7tPiLA=
 github.com/miekg/dns v1.1.40/go.mod h1:KNUDUusw/aVsxyTYZM1oqvCicbwhgbNgztCETuNZ7xM=
 github.com/mitchellh/cli v1.0.0/go.mod h1:hNIlj7HEI86fIcpObd7a0FcrxTWetlwJDGcceTlRvqc=
 github.com/mitchellh/cli v1.1.0/go.mod h1:xcISNoH86gajksDmfB23e/pu+B+GeFRMYmoHXxx3xhI=
-github.com/mitchellh/cli v1.1.1 h1:J64v/xD7Clql+JVKSvkYojLOXu1ibnY9ZjGLwSt/89w=
-github.com/mitchellh/cli v1.1.1/go.mod h1:xcISNoH86gajksDmfB23e/pu+B+GeFRMYmoHXxx3xhI=
 github.com/mitchellh/cli v1.1.2 h1:PvH+lL2B7IQ101xQL63Of8yFS2y+aDlsFcsqNc+u/Kw=
 github.com/mitchellh/cli v1.1.2/go.mod h1:6iaV0fGdElS6dPBx0EApTxHrcWvmJphyh2n8YBLPPZ4=
 github.com/mitchellh/copystructure v1.0.0 h1:Laisrj+bAB6b/yJwB5Bt3ITZhGJdqmxquMKeZ+mmkFQ=

website/content/docs/agent/template-config.mdx

@@ -52,3 +52,8 @@ The top level `template_config` block has the following configuration entries:
 - `exit_on_retry_failure` `(bool: false)` - This option configures Vault Agent
 to exit after it has exhausted its number of template retry attempts due to
 failures.
+
+- `static_secret_render_interval` `(string or integer: 5m)` - If specified, configures
+  how often Vault Agent Template should render non-leased secrets such as KV v2.
+  This setting will not change how often Vault Agent Templating renders leased
+  secrets.