create: add config_storage template

Closes #1180

@TarantoolBot document
Title: `tt create` support `config_storage` template.

Configurable parameters:
- Number of instances in replicaset
- Interval of status checking

Author: elhimov

CHANGELOG.md

@@ -9,6 +9,8 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 
 ### Added
 
+- `tt create`: add `config_storage` template
+
 ### Changed
 
 ### Fixed

cli/cmd/create.go

@@ -44,7 +44,8 @@ func NewCreateCmd() *cobra.Command {
 Built-in templates:
 	cartridge: a simple Cartridge application.
 	single_instance: Tarantool 3 application with a single instance configuration.
-	vshard_cluster: Tarantool 3 vshard cluster application.`,
+	vshard_cluster: Tarantool 3 vshard cluster application.
+	config_storage: Tarantool 3 cluster configuration storage.`,
 		Example: `
 # Create an application app1 from a template.
 
@@ -62,7 +63,11 @@ Built-in templates:
 
 # Create Tarantool 3 vshard cluster.
 
-    $ tt create vshard_cluster --name cluster_app`,
+    $ tt create vshard_cluster --name cluster_app
+
+# Create Tarantool 3 cluster configuration storage.
+
+    $ tt create config_storage --name tcs`,
 	}
 
 	createCmd.Flags().StringVarP(&appName, "name", "n", "", "Application name")

cli/cmd/create_test.go

@@ -41,6 +41,7 @@ func TestCreateValidArgsFunction(t *testing.T) {
 		"cartridge",
 		"vshard_cluster",
 		"single_instance",
+		"config_storage",
 		"archive",
 		"template2",
 		tdir1Name,

cli/codegen/generate_code.go

@@ -136,6 +136,14 @@ func main() {
 	if err != nil {
 		log.Errorf("error while generating file modes: %s", err)
 	}
+	err = generateFileModeFile(
+		"cli/create/builtin_templates/templates/config_storage",
+		"cli/create/builtin_templates/static/config_storage_template_filemodes_gen.go",
+		"ConfigStorage",
+	)
+	if err != nil {
+		log.Errorf("error while generating file modes: %s", err)
+	}
 
 	if err = generateLuaCodeVar(); err != nil {
 		log.Errorf("error while generating lua code string variables: %s", err)

cli/create/builtin_templates/builtin_templates.go

@@ -14,7 +14,13 @@ var FileModes = map[string]map[string]int{
 	"cartridge":       static.CartridgeFileModes,
 	"vshard_cluster":  static.VshardClusterFileModes,
 	"single_instance": static.SingleInstanceFileModes,
+	"config_storage":  static.ConfigStorageFileModes,
 }
 
 // Names contains built-in template names.
-var Names = [...]string{"cartridge", "vshard_cluster", "single_instance"}
+var Names = [...]string{
+	"cartridge",
+	"vshard_cluster",
+	"single_instance",
+	"config_storage",
+}

cli/create/builtin_templates/templates/config_storage/MANIFEST.yaml

@@ -0,0 +1,20 @@
+description: Config storage template
+follow-up-message: |
+  What's next?
+  Build and start '{{ .name }}' application:
+      $ tt build {{ .name }}
+      $ tt start {{ .name }}
+
+  Pay attention that default passwords were generated,
+  you can change it in the config.yaml.
+
+vars:
+  - prompt: Storages replicas (odd, >=3)
+    name: replicas_count
+    default: '3'
+    re: ^([3579]|[1-9]\d*[13579])$
+
+  - prompt: Status check interval
+    name: status_check_interval
+    default: '5'
+    re: ^[1-9]\d*$

cli/create/builtin_templates/templates/config_storage/config.yaml.tt.template

@@ -0,0 +1,50 @@
+credentials:
+  users:
+    replicator:
+      password: 'topsecret'
+      roles: [replication]
+    client:
+      password: 'secret'
+      privileges:
+        - permissions: [execute]
+          lua_call:
+            - config.storage.get
+            - config.storage.put
+            - config.storage.delete
+            - config.storage.keepalive
+            - config.storage.txn
+            - config.storage.info
+        # Not necessary since tarantool 3.5.0, 3.4.1, 3.3.3, 3.2.2.
+        - permissions: [read, write]
+          spaces: [config_storage, config_storage_meta]
+
+iproto:
+  advertise:
+    peer:
+      login: replicator
+
+replication:
+  failover: election
+
+database:
+  use_mvcc_engine: true
+
+groups:
+  group-001:
+    replicasets:
+{{- $status_check_interval := atoi .status_check_interval}}
+{{- $replicas := atoi .replicas_count}}
+{{- range replicasets "replicaset" 1 $replicas}}
+      {{.Name}}:
+        roles: [config.storage]
+        roles_cfg:
+          config.storage:
+            status_check_interval: {{$status_check_interval}}
+        instances:
+{{- range .InstNames}}
+          {{.}}:
+            iproto:
+              listen:
+              - uri: 127.0.0.1:{{port}}
+{{- end}}
+{{- end}}

cli/create/builtin_templates/templates/config_storage/instances.yaml.tt.template

@@ -0,0 +1,7 @@
+---
+{{- $replicas := atoi .replicas_count}}
+{{- range replicasets "replicaset" 1 $replicas}}
+{{- range .InstNames}}
+{{.}}:
+{{- end}}
+{{- end}}