架构图

bookinfo 原始架构为四个微服务，Pdoduct Page 访问 3个不同版本的 Reviews 和 Details，Reviews 访问 Ratings

运行到 Istio 环境，每个服务注入 Envoy sidecars 后 服务之间访问通过 Sidecar 访问

远程访问

Reviews微服务使用 Java 中 javax.ws.rs.client.Client 访问 Ratings ，如果没有配置系统环境变量，则直接k8s中服务名访问，即: http://ratings:9080/ratings 进行访问

private final static String services_domain = System.getenv("SERVICES_DOMAIN") == null ? "" : ("." + System.getenv("SERVICES_DOMAIN"));
private final static String ratings_hostname = System.getenv("RATINGS_HOSTNAME") == null ? "ratings" : System.getenv("RATINGS_HOSTNAME");
private final static String ratings_service = "http://" + ratings_hostname + services_domain + ":9080/ratings";

Product page 微服务使用 Python 远程访问 ，使用 k8s 中 service 名称进行远程访问

servicesDomain = "" if (os.environ.get("SERVICES_DOMAIN") is None) else "." + os.environ.get("SERVICES_DOMAIN")
detailsHostname = "details" if (os.environ.get("DETAILS_HOSTNAME") is None) else os.environ.get("DETAILS_HOSTNAME")
ratingsHostname = "ratings" if (os.environ.get("RATINGS_HOSTNAME") is None) else os.environ.get("RATINGS_HOSTNAME")
reviewsHostname = "reviews" if (os.environ.get("REVIEWS_HOSTNAME") is None) else os.environ.get("REVIEWS_HOSTNAME")

flood_factor = 0 if (os.environ.get("FLOOD_FACTOR") is None) else int(os.environ.get("FLOOD_FACTOR"))

details = {
    "name": "http://{0}{1}:9080".format(detailsHostname, servicesDomain),
    "endpoint": "details",
    "children": []
}

接入层网关

使用ingressgateway，为应用部署接入层网关

kubectl apply -f samples/bookinfo/networking/bookinfo-gateway.yaml

apiVersion: networking.istio.io/v1alpha3
kind: Gateway
metadata:
  name: bookinfo-gateway
spec:
  selector:
    istio: ingressgateway # use istio default controller
  servers:
  - port:
      number: 80
      name: http
      protocol: HTTP
    hosts:
    - "*"
---
apiVersion: networking.istio.io/v1alpha3
kind: VirtualService
metadata:
  name: bookinfo
spec:
  hosts:
  - "*"
  gateways:
  - bookinfo-gateway
  http:
  - match:
    - uri:
        exact: /productpage
    - uri:
        prefix: /static
    - uri:
        exact: /login
    - uri:
        exact: /logout
    - uri:
        prefix: /api/v1/products
    route:
    - destination:
        host: productpage
        port:
          number: 9080

Mysql 数据库

Mysql 镜像

FROM mysql:8.0.20
# MYSQL_ROOT_PASSWORD must be supplied as an env var

COPY ./mysqldb-init.sql /docker-entrypoint-initdb.d

镜像中执行的默认 SQL 语句

# Initialize a mysql db with a 'test' db and be able test productpage with it.
# mysql -h 127.0.0.1 -ppassword < mysqldb-init.sql

CREATE DATABASE test;
USE test;

CREATE TABLE `ratings` (
  `ReviewID` INT NOT NULL,
  `Rating` INT,
  PRIMARY KEY (`ReviewID`)
);
INSERT INTO ratings (ReviewID, Rating) VALUES (1, 5);
INSERT INTO ratings (ReviewID, Rating) VALUES (2, 4);

同样 Mongodb 中也进行了初始化

FROM mongo:4.0.19-xenial
WORKDIR /app/data/
COPY ratings_data.json /app/data/
COPY script.sh /docker-entrypoint-initdb.d/
RUN chmod +x /docker-entrypoint-initdb.d/script.sh