diff --git a/comments/Makefile b/comments/Makefile
index e288495..5a99bc0 100644
--- a/comments/Makefile
+++ b/comments/Makefile
@@ -27,10 +27,12 @@ db-create-migration:
 	$(BINDIR)/goose -dir $(MIGRATIONS_FOLDER) create -s $(n) sql
 
 db-migrate:
-	$(BINDIR)/goose -dir $(MIGRATIONS_FOLDER) postgres "$(LOCAL_DB_DSN)" up
+	$(BINDIR)/goose -dir $(MIGRATIONS_FOLDER) postgres "postgresql://$(PROD_USER)-1:$(PROD_PASS)-1@192.168.64.5:5438/comments_db?sslmode=disable" up
+	$(BINDIR)/goose -dir $(MIGRATIONS_FOLDER) postgres "postgresql://$(PROD_USER)-2:$(PROD_PASS)-2@192.168.64.5:5439/comments_db?sslmode=disable" up
 
 db-migrate-down:
-	$(BINDIR)/goose -dir $(MIGRATIONS_FOLDER) postgres "$(LOCAL_DB_DSN)" down
+	$(BINDIR)/goose -dir $(MIGRATIONS_FOLDER) postgres "postgresql://$(PROD_USER)-1:$(PROD_PASS)-1@192.168.64.5:5438/comments_db?sslmode=disable" down
+	$(BINDIR)/goose -dir $(MIGRATIONS_FOLDER) postgres "postgresql://$(PROD_USER)-2:$(PROD_PASS)-2@192.168.64.5:5439/comments_db?sslmode=disable" down
 
 db-reset-local:
 	psql -c "drop database if exists \"$(LOCAL_DB_NAME)\""
diff --git a/comments/configs/values_local.yaml b/comments/configs/values_local.yaml
index eafe322..becea89 100644
--- a/comments/configs/values_local.yaml
+++ b/comments/configs/values_local.yaml
@@ -7,14 +7,14 @@ service:
   http_port: 8086
 
 db_shards:
-  - host: localhost
-    port: 5434
+  - host: 192.168.64.5
+    port: 5438
     user: comments-user-1
     password: comments-password-1
     db_name: comments_db
 
-  - host: localhost
-    port: 5435
+  - host: 192.168.64.5
+    port: 5439
     user: comments-user-2
     password: comments-password-2
     db_name: comments_db
diff --git a/comments/db/migrations/00001_create_comments.sql b/comments/db/migrations/00001_create_comments.sql
index 5113b4a..2e52b3c 100644
--- a/comments/db/migrations/00001_create_comments.sql
+++ b/comments/db/migrations/00001_create_comments.sql
@@ -1,6 +1,6 @@
 -- +goose Up
 CREATE TABLE comments (
-  id          BIGSERIAL PRIMARY KEY,
+  id          BIGINT PRIMARY KEY,
   user_id     BIGINT NOT NULL,
   sku         BIGINT NOT NULL,
   text        VARCHAR(255) NOT NULL,
@@ -12,5 +12,3 @@ CREATE INDEX user_id_idx ON comments(user_id, created_at DESC);
 
 -- +goose Down
 DROP TABLE comments;
-DROP INDEX sku_idx;
-DROP INDEX user_id_idx;
\ No newline at end of file
diff --git a/comments/infra/repository/sqlc/query.sql b/comments/infra/repository/sqlc/query.sql
index e1fd8f1..20601e0 100644
--- a/comments/infra/repository/sqlc/query.sql
+++ b/comments/infra/repository/sqlc/query.sql
@@ -1,5 +1,5 @@
 -- name: InsertComment :one
-INSERT INTO comments (user_id, sku, text) VALUES ($1, $2, $3)
+INSERT INTO comments (id, user_id, sku, text) VALUES ($1, $2, $3, $4)
 RETURNING id, user_id, sku, text, created_at;
 
 -- name: GetCommentByID :one
diff --git a/comments/infra/repository/sqlc/query.sql.go b/comments/infra/repository/sqlc/query.sql.go
index 601f3c9..d804178 100644
--- a/comments/infra/repository/sqlc/query.sql.go
+++ b/comments/infra/repository/sqlc/query.sql.go
@@ -27,18 +27,24 @@ func (q *Queries) GetCommentByID(ctx context.Context, id int64) (*Comment, error
 }
 
 const insertComment = `-- name: InsertComment :one
-INSERT INTO comments (user_id, sku, text) VALUES ($1, $2, $3)
+INSERT INTO comments (id, user_id, sku, text) VALUES ($1, $2, $3, $4)
 RETURNING id, user_id, sku, text, created_at
 `
 
 type InsertCommentParams struct {
+	ID     int64
 	UserID int64
 	Sku    int64
 	Text   string
 }
 
 func (q *Queries) InsertComment(ctx context.Context, arg *InsertCommentParams) (*Comment, error) {
-	row := q.db.QueryRow(ctx, insertComment, arg.UserID, arg.Sku, arg.Text)
+	row := q.db.QueryRow(ctx, insertComment,
+		arg.ID,
+		arg.UserID,
+		arg.Sku,
+		arg.Text,
+	)
 	var i Comment
 	err := row.Scan(
 		&i.ID,
diff --git a/comments/infra/repository/sqlc/repository.go b/comments/infra/repository/sqlc/repository.go
index c4266d2..c7cc404 100644
--- a/comments/infra/repository/sqlc/repository.go
+++ b/comments/infra/repository/sqlc/repository.go
@@ -3,6 +3,7 @@ package sqlc
 import (
 	"context"
 	"errors"
+	"sync"
 
 	"github.com/jackc/pgx/v5"
 	"github.com/jackc/pgx/v5/pgxpool"
@@ -15,21 +16,25 @@ import (
 type commentsRepo struct {
 	shard1 *pgxpool.Pool
 	shard2 *pgxpool.Pool
+
+	curID int64
+	idMx  sync.Mutex
 }
 
 func NewCommentsRepository(shard1, shard2 *pgxpool.Pool) *commentsRepo {
 	return &commentsRepo{
 		shard1: shard1,
 		shard2: shard2,
+		curID:  1,
 	}
 }
 
-func (r *commentsRepo) pickShard(sku int64) *pgxpool.Pool {
+func (r *commentsRepo) pickShard(sku int64) (*pgxpool.Pool, int64) {
 	if sku%2 == 0 {
-		return r.shard1
+		return r.shard1, 0
 	}
 
-	return r.shard2
+	return r.shard2, 1
 }
 
 func mapComment(c *Comment) *entity.Comment {
@@ -67,13 +72,19 @@ func (r *commentsRepo) GetCommentByID(ctx context.Context, id int64) (*entity.Co
 }
 
 func (r *commentsRepo) InsertComment(ctx context.Context, comment *entity.Comment) (*entity.Comment, error) {
-	shard := r.pickShard(comment.SKU)
+	shard, shardID := r.pickShard(comment.SKU)
 	q := New(shard)
 
+	r.idMx.Lock()
+	id := r.curID*1000 + shardID
+	r.curID++
+	r.idMx.Unlock()
+
 	req := &InsertCommentParams{
 		UserID: comment.UserID,
 		Sku:    comment.SKU,
 		Text:   comment.Text,
+		ID:     id,
 	}
 
 	c, err := q.InsertComment(ctx, req)
@@ -85,7 +96,7 @@ func (r *commentsRepo) InsertComment(ctx context.Context, comment *entity.Commen
 }
 
 func (r *commentsRepo) ListCommentsBySku(ctx context.Context, sku int64) ([]*entity.Comment, error) {
-	shard := r.pickShard(sku)
+	shard, _ := r.pickShard(sku)
 	q := New(shard)
 
 	list, err := q.ListCommentsBySku(ctx, sku)
diff --git a/docker-compose.yaml b/docker-compose.yaml
index 036daf9..e108035 100644
--- a/docker-compose.yaml
+++ b/docker-compose.yaml
@@ -5,57 +5,57 @@ volumes:
   shard2-data: {}
 
 services:
-  cart:
-    build:
-      context: .
-      dockerfile: cart/Dockerfile
-    ports:
-      - "8080:8080"
-    depends_on:
-      - product-service
+  # cart:
+  #   build:
+  #     context: .
+  #     dockerfile: cart/Dockerfile
+  #   ports:
+  #     - "8080:8080"
+  #   depends_on:
+  #     - product-service
 
-  product-service:
-    image: gitlab-registry.ozon.dev/go/classroom-18/students/homework-draft/products:latest
-    ports:
-      - "8082:8082"
+  # product-service:
+  #   image: gitlab-registry.ozon.dev/go/classroom-18/students/homework-draft/products:latest
+  #   ports:
+  #     - "8082:8082"
 
-  loms:
-    build: 
-      context: .
-      dockerfile: loms/Dockerfile
-    depends_on:
-      postgres-master:
-        condition: service_started
-      init-kafka:
-        condition: service_completed_successfully
-    ports:
-      - "8083:8083"
-      - "8084:8084"
-      - "8085:8085"
+  # loms:
+  #   build: 
+  #     context: .
+  #     dockerfile: loms/Dockerfile
+  #   depends_on:
+  #     postgres-master:
+  #       condition: service_started
+  #     init-kafka:
+  #       condition: service_completed_successfully
+  #   ports:
+  #     - "8083:8083"
+  #     - "8084:8084"
+  #     - "8085:8085"
 
-  notifier:
-    build:
-      context: .
-      dockerfile: notifier/Dockerfile
-    depends_on:
-      init-kafka:
-        condition: service_completed_successfully
-    deploy:
-      replicas: 3
+  # notifier:
+  #   build:
+  #     context: .
+  #     dockerfile: notifier/Dockerfile
+  #   depends_on:
+  #     init-kafka:
+  #       condition: service_completed_successfully
+  #   deploy:
+  #     replicas: 3
 
-  comments:
-    build: 
-      context: .
-      dockerfile: comments/Dockerfile
-    depends_on:
-      postgres-comments-shard-1:
-        condition: service_started
-      postgres-comments-shard-2:  
-        condition: service_started
-    ports:
-      - "8083:8083"
-      - "8084:8084"
-      - "8085:8085"
+  # comments:
+  #   build: 
+  #     context: .
+  #     dockerfile: comments/Dockerfile
+  #   depends_on:
+  #     postgres-comments-shard-1:
+  #       condition: service_started
+  #     postgres-comments-shard-2:  
+  #       condition: service_started
+  #   ports:
+  #     - "8083:8083"
+  #     - "8084:8084"
+  #     - "8085:8085"
 
   postgres-master:
     image: gitlab-registry.ozon.dev/go/classroom-18/students/base/postgres:16
@@ -98,7 +98,7 @@ services:
       POSTGRES_USER: comments-user-1
       POSTGRES_PASSWORD: comments-password-1
     ports:
-      - "5432:5432"
+      - "5438:5432"
     volumes:
       - shard1-data:/var/lib/postgresql/data
 
@@ -109,7 +109,7 @@ services:
       POSTGRES_USER: comments-user-2
       POSTGRES_PASSWORD: comments-password-2
     ports:
-      - "5432:5432"
+      - "5439:5432"
     volumes:
       - shard2-data:/var/lib/postgresql/data
 
diff --git a/docs/homework-8/comment.http b/docs/homework-8/comment.http
new file mode 100644
index 0000000..d6b552b
--- /dev/null
+++ b/docs/homework-8/comment.http
@@ -0,0 +1,593 @@
+########################## add
+
+### add valid comment
+POST http://localhost:8086/comment/add
+Content-Type: application/json
+
+{
+  "user_id": 42,
+  "sku": 1004005,
+  "comment": "hello world"
+}
+
+### Expect:
+### {
+###  "id": "1001"
+### }
+
+
+### add invalid comment, miss user_id
+POST http://localhost:8086/comment/add
+Content-Type: application/json
+
+{
+  "sku": 1004005,
+  "comment": "hello world"
+}
+
+### Expect:
+### {
+###  "code": 3,
+###  "message": "invalid CommentAddRequest.UserId: value must be greater than 0",
+###  "details": []
+### }
+
+
+### add invalid comment, negative user_id
+POST http://localhost:8086/comment/add
+Content-Type: application/json
+
+{
+  "user_id": -42,
+  "sku": 1004005,
+  "comment": "hello world"
+}
+
+### Expect:
+### {
+###  "code": 3,
+###  "message": "invalid CommentAddRequest.UserId: value must be greater than 0",
+###  "details": []
+### }
+
+
+### add invalid comment, miss sku
+POST http://localhost:8086/comment/add
+Content-Type: application/json
+
+{
+  "user_id": 42,
+  "comment": "hello world"
+}
+
+### Expect:
+### {
+###  "code": 3,
+###  "message": "invalid CommentAddRequest.Sku: value must be greater than 0",
+###  "details": []
+### }
+
+
+### add invalid comment, negative sku
+POST http://localhost:8086/comment/add
+Content-Type: application/json
+
+{
+  "user_id": 42,
+  "sku": -10,
+  "comment": "hello world"
+}
+
+### Expect:
+### {
+###  "code": 3,
+###  "message": "invalid CommentAddRequest.Sku: value must be greater than 0",
+###  "details": []
+### }
+
+
+### add invalid comment, miss comment
+POST http://localhost:8086/comment/add
+Content-Type: application/json
+
+{
+  "user_id": 42,
+  "sku": 1004005
+}
+
+### Expect:
+### {
+###  "code": 3,
+###  "message": "invalid CommentAddRequest.Comment: value length must be between 1 and 255 runes, inclusive",
+###  "details": []
+### }
+
+
+### add invalid comment, empty comment
+POST http://localhost:8086/comment/add
+Content-Type: application/json
+
+{
+  "user_id": 42,
+  "sku": 1004005,
+  "comment": ""
+}
+
+
+### Expect:
+### {
+###  "code": 3,
+###  "message": "invalid CommentAddRequest.Comment: value length must be between 1 and 255 runes, inclusive",
+###  "details": []
+### }
+
+
+### add invalid comment, too large comment
+POST http://localhost:8086/comment/add
+Content-Type: application/json
+
+{
+  "user_id": 42,
+  "sku": 1004005,
+  "comment": "1234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456"
+}
+
+### Expect:
+### {
+###  "code": 3,
+###  "message": "invalid CommentAddRequest.Comment: value length must be between 1 and 255 runes, inclusive",
+###  "details": []
+### }
+
+
+
+
+
+########################## get by id
+
+### set precondition BEGIN ###
+### save comment_id from response
+
+### add valid comment
+POST http://localhost:8086/comment/add
+Content-Type: application/json
+
+{
+  "user_id": 123,
+  "sku": 456005,
+  "comment": "hello world 123"
+}
+
+### Expect:
+### {
+###   "id": "8000"
+### }
+
+### set precondition END ###
+
+### get valid, previously created, comment
+POST http://localhost:8086/comment/get-by-id
+Content-Type: application/json
+
+{
+  "id": 8000
+}
+
+### Expect:
+### {
+###   "id": "8000",
+###   "user_id": "123",
+###   "sku": "456005",
+###   "comment": "hello world 123",
+###   "created_at": "2025-01-13T17:15:17.252417Z"
+### }
+
+
+### get comment by invalid id (negative)
+POST http://localhost:8086/comment/get-by-id
+Content-Type: application/json
+
+{
+  "id": -8000
+}
+
+### Expect:
+### {
+###   "code": 3,
+###   "message": "invalid CommentGetByIDRequest.Id: value must be greater than 0",
+###   "details": []
+### }
+
+
+### get comment by id, which not exists
+POST http://localhost:8086/comment/get-by-id
+Content-Type: application/json
+
+{
+  "id": 404000
+}
+
+### Expect:
+### {
+###   "code": 5,
+###   "message": "comment with id=404000 not found",
+###   "details": []
+### }
+
+
+
+
+
+########################## edit
+
+### edit valid comment
+POST http://localhost:8086/comment/edit
+Content-Type: application/json
+
+{
+  "user_id": 42,
+  "comment_id": 1001,
+  "new_comment": "hello world changed"
+}
+
+### Expect
+### {}
+
+
+### edit invalid comment, user is not an author
+POST http://localhost:8086/comment/edit
+Content-Type: application/json
+
+{
+  "user_id": 555555,
+  "comment_id": 1001,
+  "new_comment": "hello world changed"
+}
+
+### Expect
+### {
+###  "code": 7,
+###  "message": "unable to edit comment: given user is not an author of modified comment",
+###  "details": []
+### }
+
+
+### edit invalid comment, comment is not exists
+POST http://localhost:8086/comment/edit
+Content-Type: application/json
+
+{
+  "user_id": 42,
+  "comment_id": 555551001,
+  "new_comment": "hello world changed"
+}
+
+### Expect
+### {
+###  "code": 5,
+###  "message": "editing comment is not found",
+###  "details": []
+### }
+
+
+### edit invalid comment, miss user_id
+POST http://localhost:8086/comment/edit
+Content-Type: application/json
+
+{
+  "comment_id": 1001,
+  "new_comment": "hello world changed"
+}
+
+### Expect
+### {
+###  "code": 3,
+###  "message": "invalid CommentEditRequest.UserId: value must be greater than 0",
+###  "details": []
+### }
+
+
+### edit invalid comment, negative user_id
+POST http://localhost:8086/comment/edit
+Content-Type: application/json
+
+{
+  "user_id": -42,
+  "comment_id": 1001,
+  "new_comment": "hello world changed"
+}
+
+### Expect
+### {
+###  "code": 3,
+###  "message": "invalid CommentEditRequest.UserId: value must be greater than 0",
+###  "details": []
+### }
+
+
+### edit invalid comment, miss comment_id
+POST http://localhost:8086/comment/edit
+Content-Type: application/json
+
+{
+  "user_id": 42,
+  "new_comment": "hello world changed"
+}
+
+### Expect
+### {
+###  "code": 3,
+###  "message": "invalid CommentEditRequest.CommentId: value must be greater than 0",
+###  "details": []
+### }
+
+
+### edit invalid comment, negative comment_id
+POST http://localhost:8086/comment/edit
+Content-Type: application/json
+
+{
+  "user_id": 42,
+  "comment_id": -1001,
+  "new_comment": "hello world changed"
+}
+
+### Expect
+### {
+###  "code": 3,
+###  "message": "invalid CommentEditRequest.CommentId: value must be greater than 0",
+###  "details": []
+### }
+
+
+### edit invalid comment, miss new_comment
+POST http://localhost:8086/comment/edit
+Content-Type: application/json
+
+{
+  "user_id": 42,
+  "comment_id": 1001
+}
+
+### Expect
+### {
+###  "code": 3,
+###  "message": "invalid CommentEditRequest.NewComment: value length must be between 1 and 255 runes, inclusive",
+###  "details": []
+### }
+
+
+### edit invalid comment, empty new_comment
+POST http://localhost:8086/comment/edit
+Content-Type: application/json
+
+{
+  "user_id": 42,
+  "comment_id": 1001,
+  "new_comment": ""
+}
+
+### Expect
+### {
+###  "code": 3,
+###  "message": "invalid CommentEditRequest.NewComment: value length must be between 1 and 255 runes, inclusive",
+###  "details": []
+### }
+
+
+### edit invalid comment, too long new_comment
+POST http://localhost:8086/comment/edit
+Content-Type: application/json
+
+{
+  "user_id": 42,
+  "comment_id": 1001,
+  "new_comment": "1234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456"
+}
+
+### Expect
+### {
+###  "code": 3,
+###  "message": "invalid CommentEditRequest.NewComment: value length must be between 1 and 255 runes, inclusive",
+###  "details": []
+### }
+
+
+### edit valid comment, but editable time expired (CHANGE EditInterval!!!)
+POST http://localhost:8086/comment/edit
+Content-Type: application/json
+
+{
+  "user_id": 42,
+  "comment_id": 1001,
+  "new_comment": "hello world changed 3"
+}
+
+### Expect
+### {
+###  "code": 9,
+###  "message": "unable to edit comment: editing time interval expired",
+###  "details": []
+### }
+
+
+
+
+
+########################## list by sku
+
+### set precondition BEGIN ###
+
+### add valid comment 1
+POST http://localhost:8086/comment/add
+Content-Type: application/json
+
+{"user_id": 71, "sku": 123, "comment": "hello world 1"}
+
+### add valid comment 2
+POST http://localhost:8086/comment/add
+Content-Type: application/json
+
+{"user_id": 71, "sku": 123, "comment": "hello world 2"}
+
+### add valid comment 3
+POST http://localhost:8086/comment/add
+Content-Type: application/json
+
+{"user_id": 71, "sku": 123, "comment": "hello world 3"}
+
+### set precondition END ###
+
+### list comments by sku
+POST http://localhost:8086/comment/list-by-sku
+Content-Type: application/json
+
+{"sku": 123}
+
+### Expected (order created_at DESC, IMPORTANT!!!):
+### {
+###   "comments": [
+###     {
+###       "id": "5001",
+###       "user_id": "71",
+###       "comment": "hello world 3",
+###       "created_at": "2024-12-24T22:32:54.301507Z"
+###     },
+###     {
+###       "id": "4001",
+###       "user_id": "71",
+###       "comment": "hello world 2",
+###       "created_at": "2024-12-24T22:32:52.656693Z"
+###     },
+###     {
+###       "id": "3001",
+###       "user_id": "71",
+###       "comment": "hello world 1",
+###       "created_at": "2024-12-24T22:32:50.302224Z"
+###     }
+###   ]
+### }
+
+
+### list comments by sku, sku have no comments yet
+POST http://localhost:8086/comment/list-by-sku
+Content-Type: application/json
+
+{"sku": 444444}
+
+### Expected:
+### {
+###   "comments": []
+### }
+
+
+### list comments by sku, invalid, miss sku
+POST http://localhost:8086/comment/list-by-sku
+Content-Type: application/json
+
+{}
+
+### Expected:
+### {
+###   "code": 3,
+###   "message": "invalid CommentListBySKURequest.Sku: value must be greater than 0",
+###   "details": []
+### }
+
+
+### list comments by sku, invalid, negative sku
+POST http://localhost:8086/comment/list-by-sku
+Content-Type: application/json
+
+{
+  "sku": -1234
+}
+
+### Expected:
+### {
+###   "code": 3,
+###   "message": "invalid CommentListBySKURequest.Sku: value must be greater than 0",
+###   "details": []
+### }
+
+
+
+
+
+########################## list by user
+### set precondition BEGIN ###
+
+### add valid comment 1
+POST http://localhost:8086/comment/add
+Content-Type: application/json
+
+{"user_id": 54, "sku": 789, "comment": "comment #1 54-789 (shard-2)"}
+
+### add valid comment 1
+POST http://localhost:8086/comment/add
+Content-Type: application/json
+
+{"user_id": 54, "sku": 456, "comment": "comment #1 54-456 (shard-1)"}
+
+### add valid comment 2
+POST http://localhost:8086/comment/add
+Content-Type: application/json
+
+{"user_id": 54, "sku": 220, "comment": "comment #2 54-220 (shard-1)"}
+
+### add valid comment 3
+POST http://localhost:8086/comment/add
+Content-Type: application/json
+
+{"user_id": 54, "sku": 567, "comment": "comment #2 54-567 (shard-2)"}
+
+### set precondition END ###
+
+
+### list comments by user
+POST http://localhost:8086/comment/list-by-user
+Content-Type: application/json
+
+{"user_id": 54}
+
+### Expected (order by created_at DESC, IMPORTANT!!!):
+### {
+###   "comments": [
+###     {
+###       "id": "13001",
+###       "sku": "567",
+###       "comment": "comment #2 54-567 (shard-2)",
+###       "created_at": "2024-12-24T22:45:52.284861Z"
+###     },
+###     {
+###       "id": "5000",
+###       "sku": "220",
+###       "comment": "comment #2 54-220 (shard-1)",
+###       "created_at": "2024-12-24T22:45:49.050342Z"
+###     },
+###     {
+###       "id": "4000",
+###       "sku": "456",
+###       "comment": "comment #1 54-456 (shard-1)",
+###       "created_at": "2024-12-24T22:45:45.511675Z"
+###     },
+###     {
+###       "id": "12001",
+###       "sku": "789",
+###       "comment": "comment #1 54-789 (shard-2)",
+###       "created_at": "2024-12-24T22:45:39.449233Z"
+###     }
+###   ]
+### }
+
+
+### list comments by user, no comments for user
+POST http://localhost:8086/comment/list-by-user
+Content-Type: application/json
+
+{"user_id": 32423423}
+
+### Expected:
+### {
+###   "comments": []
+### }