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  • 使用Netflix Sidecar和Spring Boot进行项目 重要的是要注意,Sidecar需要在application.yml中包含NodeJs / Python /任何服务器端口,以便在Zuul中正常工作和注册服务。 建议设置主页以及健康uri。 application.yml ...
  • sidecar:解释Sidecar容器的示例项目
  • [在制品] Moleculer Sidecar Moleculer Sidecar允许在Moleculer微服务项目中使用外部服务(以其他官方不支持的其他编程语言编写)。 Sidecar是一个HTTP服务器,它提供REST接口来通信其他Moleculer服务,而不是实现...
  • JupyterLab的sidecar输出小部件 安装 pip install sidecar 或者 conda install sidecar 如果您使用JupyterLab <= 2: jupyter labextension install @jupyter-widgets/jupyterlab-manager jupyter ...
  • sidecar

    2019-01-14 15:24:57
    由于不会使用其他语言去写一些请求,所以sidecar这部分只是进行了理解,没有加以验证。需要的可以参考一下。 1、pom.xml &lt;dependencies&gt; &lt;dependency&gt; &lt;groupId&gt;...

    由于不会使用其他语言去写一些请求,所以sidecar这部分只是进行了理解,没有加以验证。需要的可以参考一下。

    1、pom.xml

     <dependencies>
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter</artifactId>
            </dependency>
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-web</artifactId>
            </dependency>
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-test</artifactId>
                <scope>test</scope>
            </dependency>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
            </dependency>
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-actuator</artifactId>
                <!--客户端只有当我们有了这个依赖之后,才能有那些状态页面的查看,否则会报ErrorPage-->
            </dependency>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-netflix-sidecar</artifactId>
            </dependency>
        </dependencies>

    2、启动类

    @SpringBootApplication
    @EnableSidecar
    public class SidecarApplication {
    
        public static void main(String[] args) {
            SpringApplication.run(SidecarApplication.class, args);
        }
    
    }
    
    

    @EnableSoder注解包含了其它几个注解:

    @EnableCircuitBreaker    hystrix
    @EnableZuulProxy     zuul
    

    3、application.yml

    spring:
      application:
        name: eureka-client-sidecar
    server:
      port: 8607
    eureka:
      instance:
        prefer-ip-address: true
      client:
        service-url:
          defaultZone: http://localhost:8761/eureka/
        healthcheck:
          enabled: true
    
    sidecar:
      port: 8000
      health-uri: http://localhost:8000/health.json

    sidecar里面配置的是那些用别的语言写的服务,sidecar要求health-url需要返回json字符如下:

    {
      "status":"UP"
    }

    另外很明显,sidecar的配置中只有port没有url,所以我们要保证sidecar和那个用别的语言写的服务在同一主机上,当然如果不是同一主机也有办法配置,这个请自行百度。  

    配好之后,这个就相当于这个服务是注册到了eureka上,我们照常像之前那些注册的服务一样使用即可

    展开全文
  • Sidecar执行器 借助服务发现,在Mesos上运行Docker容器! 我们正在使用HubSpot的调度程序来运行它。 这是一个Mesos执行器,与服务发现平台集成在一起,可以将更紧密地绑定到Mesos生态系统中。 执行程序的主要优点...
  • sidecar详解

    2021-05-28 18:12:36
    Sidecar描述了sidecar代理的配置,sidecar代理调解与其连接的工作负载的 inbound 和 outbound 通信。 默认情况下,Istio将为网格中的所有Sidecar代理服务,使其具有到达网格中每个工作负载所需的必要配置,并在与...

    istio课程发布:https://edu.csdn.net/course/detail/29911

    这是我目前见过最详细,最有深度的istio课程

    学习目标

    什么是sidecar

    Sidecar描述了sidecar代理的配置,sidecar代理调解与其连接的工作负载的 inbound 和 outbound 通信。 默认情况下,Istio将为网格中的所有Sidecar代理服务,使其具有到达网格中每个工作负载所需的必要配置,并在与工作负载关联的所有端口上接收流量。 Sidecar资源提供了一种的方法,在向工作负载转发流量或从工作负载转发流量时,微调端口集合和代理将接收的协议。 此外,可以限制代理在从工作负载转发 outbound 流量时可以达到的服务集合。

    网格中的服务和配置被组织成一个或多个名称空间(例如,Kubernetes名称空间或CF org/space)。 命名空间中的Sidecar资源将应用于同一命名空间中的一个或多个工作负载,由workloadSelector选择。 如果没有workloadSelector,它将应用于同一名称空间中的所有工作负载。 在确定要应用于工作负载的Sidecar资源时,将优先使用通过workloadSelector而选择到此工作负载的的资源,而不是没有任何workloadSelector的资源。

    注意:每个命名空间只能有一个没有任何工作负载选择器的Sidecar资源。 如果给定命名空间中存在多个无选择器的Sidecar资源,则系统的行为是不确定的。 如果具有工作负载选择器的两个或多个Sidecar资源选择相同的工作负载,则系统的行为是不确定的。

    资源详解

    Field Type Description Required
    workloadSelector WorkloadSelector Criteria used to select the specific set of pods/VMs on which this Sidecar configuration should be applied. If omitted, the Sidecar configuration will be applied to all workload instances in the same namespace. No
    ingress IstioIngressListener[] Ingress specifies the configuration of the sidecar for processing inbound traffic to the attached workload instance. If omitted, Istio will automatically configure the sidecar based on the information about the workload obtained from the orchestration platform (e.g., exposed ports, services, etc.). If specified, inbound ports are configured if and only if the workload instance is associated with a service. No
    egress IstioEgressListener[] Egress specifies the configuration of the sidecar for processing outbound traffic from the attached workload instance to other services in the mesh. Yes
    outboundTrafficPolicy OutboundTrafficPolicy This allows to configure the outbound traffic policy. If your application uses one or more external services that are not known apriori, setting the policy to ALLOW_ANY will cause the sidecars to route any unknown traffic originating from the application to its requested destination. No

    全局有效

    sc-default-global.yaml

    apiVersion: networking.istio.io/v1beta1
    kind: Sidecar
    metadata:
      name: default
      namespace: istio-system
    spec:
      ingress:
      - port:
          number: 9080
          protocol: HTTP
          name: http
        defaultEndpoint: 127.0.0.1:9080

    workloadSelector

    没有selector

    sc-default-istio-ingress.yaml

    apiVersion: networking.istio.io/v1beta1
    kind: Sidecar
    metadata:
      name: default
    spec:
      ingress:
      - port:
          number: 9080
          protocol: HTTP
          name: http
        defaultEndpoint: 127.0.0.1:9080

    有selector

    sc-productpage-selector.yaml

    apiVersion: networking.istio.io/v1beta1
    kind: Sidecar
    metadata:
      name: productpage
    spec:
      workloadSelector:
        labels:
          app: productpage
      ingress:
      - port:
          number: 9081
          protocol: HTTP
          name: http
        defaultEndpoint: 127.0.0.1:9080

    监听端口和目标端口不一致,可用于端口转换

    此时service需要添加端口

    kubectl edit svc productpage -n istio

      - name: http9081
        port: 9081
        protocol: TCP
        targetPort: 9081

    修改vs端口

    sidecar/vs-bookinfo-hosts-star.yaml

    apiVersion: networking.istio.io/v1beta1
    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.istio.svc.cluster.local
            port:
              number: 9081

    egress

    Field Type Description Required
    port Port The port associated with the listener. If using Unix domain socket, use 0 as the port number, with a valid protocol. The port if specified, will be used as the default destination port associated with the imported hosts. If the port is omitted, Istio will infer the listener ports based on the imported hosts. Note that when multiple egress listeners are specified, where one or more listeners have specific ports while others have no port, the hosts exposed on a listener port will be based on the listener with the most specific port. No
    bind string The IP or the Unix domain socket to which the listener should be bound to. Port MUST be specified if bind is not empty. Format: x.x.x.x or unix:///path/to/uds or unix://@foobar (Linux abstract namespace). If omitted, Istio will automatically configure the defaults based on imported services, the workload instances to which this configuration is applied to and the captureMode. If captureMode is NONE, bind will default to 127.0.0.1. No
    captureMode CaptureMode When the bind address is an IP, the captureMode option dictates how traffic to the listener is expected to be captured (or not). captureMode must be DEFAULT or NONE for Unix domain socket binds. No
    hosts string[] One or more service hosts exposed by the listener in namespace/dnsName format. Services in the specified namespace matching dnsName will be exposed. The corresponding service can be a service in the service registry (e.g., a Kubernetes or cloud foundry service) or a service specified using a ServiceEntry or VirtualService configuration. Any associated DestinationRule in the same namespace will also be used.The dnsName should be specified using FQDN format, optionally including a wildcard character in the left-most component (e.g., prod/*.example.com). Set the dnsName to * to select all services from the specified namespace (e.g., prod/*).The namespace can be set to *, ., or ~, representing any, the current, or no namespace, respectively. For example, */foo.example.com selects the service from any available namespace while ./foo.example.com only selects the service from the namespace of the sidecar. If a host is set to */*, Istio will configure the sidecar to be able to reach every service in the mesh that is exported to the sidecar’s namespace. The value ~/* can be used to completely trim the configuration for sidecars that simply receive traffic and respond, but make no outbound connections of their own.NOTE: Only services and configuration artifacts exported to the sidecar’s namespace (e.g., exportTo value of *) can be referenced. Private configurations (e.g., exportTo set to .) will not be available. Refer to the exportTo setting in VirtualService, DestinationRule, and ServiceEntry configurations for details.WARNING: The list of egress hosts in a Sidecar must also include the Mixer control plane services if they are enabled. Envoy will not be able to reach them otherwise. For example, add host istio-system/istio-telemetry.istio-system.svc.cluster.local if telemetry is enabled, istio-system/istio-policy.istio-system.svc.cluster.local if policy is enabled, or add istio-system/* to allow all services in the istio-system namespace. This requirement is temporary and will be removed in a future Istio release. Yes

    port

    sc-productpage-egress-port.yaml

    apiVersion: networking.istio.io/v1beta1
    kind: Sidecar
    metadata:
      name: productpage
    spec:
      workloadSelector:
        labels:
          app: productpage
      egress:
      - hosts:
        - "./*"
        port:
          number: 9080
          protocol: HTTP
          name: egresshttp

    bind

    0.0.0.0

    sc-productpage-egress-bind.yaml

    apiVersion: networking.istio.io/v1beta1
    kind: Sidecar
    metadata:
      name: productpage
    spec:
      workloadSelector:
        labels:
          app: productpage
      egress:
      - hosts:
        - "./*"
        port:
          number: 9080
          protocol: HTTP
          name: egresshttp
        bind: 0.0.0.0

    目标svc ip

    sc-productpage-egress-bind-svc-ip.yaml

    apiVersion: networking.istio.io/v1beta1
    kind: Sidecar
    metadata:
      name: productpage
    spec:
      workloadSelector:
        labels:
          app: productpage
      egress:
      - hosts:
        - "./*"
        port:
          number: 9080
          protocol: HTTP
          name: egresshttp
        bind: 10.68.190.94

    captureMode

    Name Description
    DEFAULT The default capture mode defined by the environment.
    IPTABLES Capture traffic using IPtables redirection.
    NONE No traffic capture. When used in an egress listener, the application is expected to explicitly communicate with the listener port or Unix domain socket. When used in an ingress listener, care needs to be taken to ensure that the listener port is not in use by other processes on the host.

    DEFAULT

    sc-productpage-egress-captureMode-DEFAULT.yaml

    apiVersion: networking.istio.io/v1beta1
    kind: Sidecar
    metadata:
      name: productpage
    spec:
      workloadSelector:
        labels:
          app: productpage
      egress:
      - hosts:
        - "./*"
        port:
          number: 9080
          protocol: HTTP
          name: egresshttp
        bind: 0.0.0.0
        captureMode: DEFAULT

    IPTABLES

    sc-productpage-egress-captureMode-IPTABLES.yaml

    apiVersion: networking.istio.io/v1beta1
    kind: Sidecar
    metadata:
      name: productpage
    spec:
      workloadSelector:
        labels:
          app: productpage
      egress:
      - hosts:
        - "./*"
        port:
          number: 9080
          protocol: HTTP
          name: egresshttp
        bind: 0.0.0.0
        captureMode: IPTABLES

    NONE

    sc-productpage-egress-captureMode-NONE.yaml

    apiVersion: networking.istio.io/v1beta1
    kind: Sidecar
    metadata:
      name: productpage
    spec:
      workloadSelector:
        labels:
          app: productpage
      egress:
      - hosts:
        - "./*"
        port:
          number: 9080
          protocol: HTTP
          name: egresshttp
        bind: 0.0.0.0
        captureMode: NONE

    sc-productpage-ingress-captureMode-NONE.yaml

    apiVersion: networking.istio.io/v1beta1
    kind: Sidecar
    metadata:
      name: productpage
    spec:
      workloadSelector:
        labels:
          app: productpage
      ingress:
      - captureMode: NONE
        defaultEndpoint: 127.0.0.1:9080
        port:
          number: 9080
          protocol: HTTP
          name: http
      egress:
      - hosts:
        - "./*"
        port:
          number: 9080
          protocol: HTTP
          name: egresshttp
        bind: 127.0.0.1
        captureMode: NONE

    进入和出去流量都不捕获,相当于去掉了sidecar,对这个pod的istio资源将不起作用。

    注意mesh配置,允许集群外访问

    outboundTrafficPolicy: mode: REGISTRY_ONLY| ALLOW_ANY

    hosts

    dot

    sc-productpage-egress-hosts-dot.yaml

    apiVersion: networking.istio.io/v1beta1
    kind: Sidecar
    metadata:
      name: productpage
    spec:
      workloadSelector:
        labels:
          app: productpage
      egress:
      - hosts:
        - "./*"

    semi-star

    sc-productpage-egress-hosts-semi-star.yaml

    apiVersion: networking.istio.io/v1beta1
    kind: Sidecar
    metadata:
      name: productpage
    spec:
      workloadSelector:
        labels:
          app: productpage
      egress:
      - hosts:
        - "istio/*"

    double-star

    sc-productpage-egress-hosts-double-star.yaml

    apiVersion: networking.istio.io/v1beta1
    kind: Sidecar
    metadata:
      name: productpage
    spec:
      workloadSelector:
        labels:
          app: productpage
      egress:
      - hosts:
        - "*/*"

    specific

    sc-productpage-egress-hosts-specific.yaml

    apiVersion: networking.istio.io/v1beta1
    kind: Sidecar
    metadata:
      name: productpage
    spec:
      workloadSelector:
        labels:
          app: productpage
      egress:
      - hosts:
        - "istio/details.istio.svc.cluster.local"

    ingress

    Field Type Description Required
    port Port The port associated with the listener. Yes
    bind string The IP to which the listener should be bound. Must be in the format x.x.x.x. Unix domain socket addresses are not allowed in the bind field for ingress listeners. If omitted, Istio will automatically configure the defaults based on imported services and the workload instances to which this configuration is applied to. No
    captureMode CaptureMode The captureMode option dictates how traffic to the listener is expected to be captured (or not). No
    defaultEndpoint string The loopback IP endpoint or Unix domain socket to which traffic should be forwarded to. This configuration can be used to redirect traffic arriving at the bind IP:Port on the sidecar to a localhost:port or Unix domain socket where the application workload instance is listening for connections. Format should be 127.0.0.1:PORT or unix:///path/to/socket Yes

    port

    sc-productpage-ingress-port.yaml

    apiVersion: networking.istio.io/v1beta1
    kind: Sidecar
    metadata:
      name: productpage
    spec:
      workloadSelector:
        labels:
          app: productpage
      ingress:
      - captureMode: IPTABLES
        defaultEndpoint: 127.0.0.1:9080
        port:
          number: 9080
          protocol: HTTP
          name: http

    bind

    sc-productpage-ingress-bind.yaml

    apiVersion: networking.istio.io/v1beta1
    kind: Sidecar
    metadata:
      name: productpage
    spec:
      workloadSelector:
        labels:
          app: productpage
      ingress:
      - captureMode: IPTABLES
        bind: 0.0.0.0
        defaultEndpoint: 127.0.0.1:9080
        port:
          number: 9080
          protocol: HTTP
          name: http

    sc-productpage-ingress-bind-pod-ip.yaml

    apiVersion: networking.istio.io/v1beta1
    kind: Sidecar
    metadata:
      name: productpage
    spec:
      workloadSelector:
        labels:
          app: productpage
      ingress:
      - captureMode: IPTABLES
        bind: 172.20.1.174
        defaultEndpoint: 127.0.0.1:9080
        port:
          number: 9080
          protocol: HTTP
          name: http

    bind pod ip

    captureMode

    Name Description
    DEFAULT The default capture mode defined by the environment.
    IPTABLES Capture traffic using IPtables redirection.
    NONE No traffic capture. When used in an egress listener, the application is expected to explicitly communicate with the listener port or Unix domain socket. When used in an ingress listener, care needs to be taken to ensure that the listener port is not in use by other processes on the host.

    DEFAULT

    sc-productpage-ingress-capture-mode-DEFAULT.yaml

    apiVersion: networking.istio.io/v1beta1
    kind: Sidecar
    metadata:
      name: productpage
    spec:
      workloadSelector:
        labels:
          app: productpage
      ingress:
      - captureMode: DEFAULT
        bind: 0.0.0.0
        defaultEndpoint: 127.0.0.1:9080
        port:
          number: 9080
          protocol: HTTP
          name: http

    IPTABLES

    sc-productpage-ingress-capture-mode-IPTABLES.yaml

    apiVersion: networking.istio.io/v1beta1
    kind: Sidecar
    metadata:
      name: productpage
    spec:
      workloadSelector:
        labels:
          app: productpage
      ingress:
      - captureMode: IPTABLES
        bind: 0.0.0.0
        defaultEndpoint: 127.0.0.1:9080
        port:
          number: 9080
          protocol: HTTP
          name: http

    NONE

    sc-productpage-ingress-capture-mode-NONE.yaml

    apiVersion: networking.istio.io/v1beta1
    kind: Sidecar
    metadata:
      name: productpage
    spec:
      workloadSelector:
        labels:
          app: productpage
      ingress:
      - captureMode: NONE
        defaultEndpoint: 127.0.0.1:9080
        port:
          number: 9080
          protocol: HTTP
          name: http

    defaultEndpoint

    unix socket

    1部署mysqlgateway

    kubectl apply -f gateway/gateway-mysql.yaml -n istio

    apiVersion: networking.istio.io/v1beta1
    kind: Gateway
    metadata:
      name: mysql
    spec:
      selector:
        istio: ingressgateway
      servers:
      - port:
          number: 3306
          name: mysql
          protocol: MYSQL
        hosts:
        - "*"

    2部署mysql vs

    kubectl apply -f gateway/protocol/vs-mysql.yaml

    apiVersion: networking.istio.io/v1beta1
    kind: VirtualService
    metadata:
      name: mysql
    spec:
      hosts:
      - "*"
      gateways:
      - mysql
      tcp:
      - match:
        - port: 3306
        route:
        - destination:
            host: mysqldb.istio.svc.cluster.local
            port:
              number: 3306

    3添加svc 端口

    kubectl edit svc istio-ingressgateway -n istio-system

    3306端口

    4部署sidecar

    sc-mysql-defaultEndpoint-unix.yaml

    当绑定地址是IP时,captureMode选项指示如何劫持(或不劫持)到监听器的流量。 对于Unix domain socket,captureMode必须为DEFAULT或NONE。

    apiVersion: networking.istio.io/v1beta1
    kind: Sidecar
    metadata:
      name: mysql
    spec:
      workloadSelector:
        labels:
          app: mysqldb
      ingress:
      - bind: 0.0.0.0
        port:
          number: 3306
          protocol: MYSQL
          name: mysql
        defaultEndpoint: unix:///var/run/mysqld/mysqld.sock
        captureMode: NONE

    ip -port

    sc-productpage-ingerss-defaultEndpoint-ip.yaml

    apiVersion: networking.istio.io/v1beta1
    kind: Sidecar
    metadata:
      name: productpage
    spec:
      workloadSelector:
        labels:
          app: productpage
      ingress:
      - captureMode: NONE
        defaultEndpoint: 127.0.0.1:9080
        port:
          number: 9080
          protocol: HTTP
          name: http

    outboundTrafficPolicy

    egressProxy

    egressProxy Destination Specifies the details of the egress proxy to which unknown traffic should be forwarded to from the sidecar. Valid only if the mode is set to ALLOW_ANY. If not specified when the mode is ALLOW_ANY, the sidecar will send the unknown traffic directly to the IP requested by the application. ** NOTE 1: The specified egress host must be imported in the egress section for the traffic forwarding to work. NOTE 2**: An Envoy based egress gateway is unlikely to be able to handle plain text TCP connections forwarded from the sidecar. Envoy's dynamic forward proxy can handle only HTTP and TLS connections. $hide_from_docs
    FIELD TYPE LABEL DESCRIPTION
    host string The name of a service from the service registry. Service names are looked up from the platform's service registry (e.g., Kubernetes services, Consul services, etc.) and from the hosts declared by ServiceEntry. Traffic forwarded to destinations that are not found in either of the two, will be dropped. Note for Kubernetes users: When short names are used (e.g. “reviews” instead of “reviews.default.svc.cluster.local”), Istio will interpret the short name based on the namespace of the rule, not the service. A rule in the “default” namespace containing a host “reviews will be interpreted as “reviews.default.svc.cluster.local”, irrespective of the actual namespace associated with the reviews service. To avoid potential misconfiguration, it is recommended to always use fully qualified domain names over short names.
    subset string The name of a subset within the service. Applicable only to services within the mesh. The subset must be defined in a corresponding DestinationRule.
    port PortSelector Specifies the port on the host that is being addressed. If a service exposes only a single port it is not required to explicitly select the port

    host

    sc-productpage-outboundTrafficPolicy-egressProxy-host.yaml

    apiVersion: networking.istio.io/v1beta1
    kind: Sidecar
    metadata:
      name: productpage
    spec:
      workloadSelector:
        labels:
          app: productpage
      outboundTrafficPolicy:
        egressProxy:
          host: "details.istio.svc.cluster.local"
          port:
            number: 9080
        mode: ALLOW_ANY

    port

    sc-productpage-outboundTrafficPolicy-egressProxy-port.yaml

    apiVersion: networking.istio.io/v1beta1
    kind: Sidecar
    metadata:
      name: productpage
    spec:
      workloadSelector:
        labels:
          app: productpage
      outboundTrafficPolicy:
        egressProxy:
          host: "details.istio.svc.cluster.local"
          port:
            number: 9080
        mode: ALLOW_ANY

    subset

    sc-productpage-outboundTrafficPolicy-egressProxy-subset.yaml

    apiVersion: networking.istio.io/v1beta1
    kind: Sidecar
    metadata:
      name: productpage
    spec:
      workloadSelector:
        labels:
          app: productpage
      outboundTrafficPolicy:
        egressProxy:
          host: "details.istio.svc.cluster.local"
          port:
            number: 9080
          subset: v1
        mode: ALLOW_ANY

    mode

    Name Description
    REGISTRY_ONLY Outbound traffic will be restricted to services defined in the service registry as well as those defined through ServiceEntry configurations.
    ALLOW_ANY Outbound traffic to unknown destinations will be allowed, in case there are no services or ServiceEntry configurations for the destination port.

    REGISTRY_ONLY

    sc-productpage-outboundTrafficPolicy-mode-REGISTRY_ONLY.yaml

    apiVersion: networking.istio.io/v1beta1
    kind: Sidecar
    metadata:
      name: productpage
    spec:
      workloadSelector:
        labels:
          app: productpage
      outboundTrafficPolicy:
        mode: REGISTRY_ONLY

    ALLOW_ANY

    sc-productpage-outboundTrafficPolicy-mode-ALLOW_ANY.yaml

    apiVersion: networking.istio.io/v1beta1
    kind: Sidecar
    metadata:
      name: productpage
    spec:
      workloadSelector:
        labels:
          app: productpage
      outboundTrafficPolicy:
        mode: ALLOW_ANY

    组合应用

    sc-productpage-complex.yaml

    apiVersion: networking.istio.io/v1beta1
    kind: Sidecar
    metadata:
      name: productpage
    spec:
      workloadSelector:
        labels:
          app: productpage
      ingress:
      - captureMode: NONE
        defaultEndpoint: 127.0.0.1:9080
        port:
          number: 9080
          protocol: HTTP
          name: http
      egress:
      - hosts:
        - "./*"
        port:
          number: 9080
          protocol: HTTP
          name: egresshttp
        bind: 127.0.0.1
        captureMode: NONE
      outboundTrafficPolicy:
        mode: REGISTRY_ONLY

    outbound将不能访问

    sc-productpage-complex-02.yaml

    apiVersion: networking.istio.io/v1beta1
    kind: Sidecar
    metadata:
      name: productpage
    spec:
      workloadSelector:
        labels:
          app: productpage
      ingress:
      - captureMode: NONE
        defaultEndpoint: 127.0.0.1:9080
        port:
          number: 9080
          protocol: HTTP
          name: http
      egress:
      - hosts:
        - "./*"
        port:
          number: 9080
          protocol: HTTP
          name: egresshttp
        bind: 127.0.0.1
        captureMode: NONE
      outboundTrafficPolicy:
        mode: ALLOW_ANY

    可以访问outbound

    sc-productpage-complex-03.yaml

    apiVersion: networking.istio.io/v1beta1
    kind: Sidecar
    metadata:
      name: productpage
    spec:
      workloadSelector:
        labels:
          app: productpage
      ingress:
      - captureMode: NONE
        defaultEndpoint: 127.0.0.1:9080
        port:
          number: 9080
          protocol: HTTP
          name: http
      egress:
      - hosts:
        - "./*"
        port:
          number: 9080
          protocol: HTTP
          name: egresshttp
        bind: 127.0.0.1
        captureMode: NONE
      outboundTrafficPolicy:
        mode: ALLOW_ANY
        egressProxy:
          host: "details.istio.svc.cluster.local"
          port:
            number: 9080
          subset: v1

    只有detail outbound能访问

    egress_proxy must be set only with ALLOW_ANY outbound_traffic_policy mode

    使用ServiceEntry

    1进入pod访问www.baidu.com

    kubectl exec -it sleep-557747455f-ft9bs -n istio -- /bin/sh

    curl www.baidu.com

    可以访问

    2部署sidecar

    sc-sleep-REGISTRY_ONLY.yaml

    apiVersion: networking.istio.io/v1beta1
    kind: Sidecar
    metadata:
      name: sleep
    spec:
      workloadSelector:
        labels:
          app: sleep
      outboundTrafficPolicy:
        mode: REGISTRY_ONLY

    3在访问www.baidu.com

    不能访问

    4部署serviceentry

    serviceentries/se-baidu.yaml

    apiVersion: networking.istio.io/v1beta1
    kind: ServiceEntry
    metadata:
      name: baidu
    spec:
      hosts:
      - "www.baidu.com"
      ports:
      - number: 80
        name: http
        protocol: HTTP
      location: MESH_EXTERNAL
      resolution: DNS

    5再访问www.baidu.com

    可以访问

    展开全文
  • Sidecar模式

    千次阅读 2020-05-27 16:26:01
    一、什么是Sidecar模式 将应用程序的功能划分为单独的进程,就是Sidecar模式。 Sidecar原意是摩托车的边车,用到软件架构中,就是Sidecar应用是连接到父应用,并为其扩展或增强功能。Sidecar应用于主应用程序松耦合...

    一、什么是Sidecar模式

    将应用程序的功能划分为单独的进程,就是Sidecar模式。

    Sidecar原意是摩托车的边车,用到软件架构中,就是Sidecar应用是连接到父应用,并为其扩展或增强功能。Sidecar应用于主应用程序松耦合。

    Sidecar应用场景举例:假如有6个微服务互相通信,共同完成来确定一个包裹的成本。每个微服务都需要监控、日志记录、配置、断路器等功能,这些功能都是用第三方库在每个微服务中实现的。

    但是,每个微服务都实现一遍监控、日志记录、配置、断路器… 功能,这是合理的吗?如果每个应用是不同的语言实现,如何合并哪些特定用于.Net, java, Python等语言的第三方库?

    二、使用Sidecar模式的优势

    • 通过抽象出于功能相关的共同基础设施到一个不同层,以降低微服务代码的复杂度
    • 因为应用不再需要编写相同的第三方组件配置文件和代码,从而降低了微服务架构中代码的复杂度
    • 降低了应用程序和底层平台的耦合度

    三、Sidecar模式是如何工作的

    服务网格层可以存在于与应用程序一起运行的Sidecar容器中,每个应用程序旁边都附有相同的Sidecar副本。

    来自单个服务的所有传入和传出网络流量,都流经Sidecar代理。因此,Sidecar能够管理微服务之间的流量,可收集数据并实施相关策略。

    从某个角度来说,应用并不需要了解网路外部的系统,只需要知道附加的Sidecar代理,这就是Sidecar模式:Sidecar工作模式的本质:将网络依赖抽象为Sidecar。
    在这里插入图片描述
    在服务网格中,有数据平面和控制平面的概念:

    • 数据平面:职责是处理网格内部服务间的通信,并负责服务发现、流量管理、健康检查等功能。
    • 控制平面:职责是管理和配置Sidecar代理,以实施策略并收集遥测。

    在Kubernates和Istio世界中,可以将Sidecar注入Pod内,Istio使用代用Envoy的Sidecar模型作为代理。

    来自Lyft的Envoy是为云原生应用程序设计的最流行的开源代理。Envoy依附着每项服务运行,并以平台无关的方式提供必要的功能,所有的服务流量都通过Envoy代理流动。

    展开全文
  • sidecar 模式

    2019-03-20 22:06:08
    Sidecar模式 什么是Sidecar sidecar模式是Istio服务网格采用的模式 sidecar翻译为"偏三","翻斗",就是摩托车另外添加了一个容器似的,组成了翻斗摩托车. 该模式其实一直存在,但是在微服务出现后开始盛行 将应用程序的...

    Sidecar模式

    什么是Sidecar
    • sidecar模式是Istio服务网格采用的模式
    • sidecar翻译为"偏三","翻斗",就是摩托车另外添加了一个容器似的,组成了翻斗摩托车.
    • 该模式其实一直存在,但是在微服务出现后开始盛行
    • 将应用程序的功能划分为单独进程的可以被视为sidecar模式.
    • sidecar允许你为应用程序添加许多功能,而无须额外第三方组件的配置和代码
    • 在软件架构中,sidecar应用是连接到父应用并且为其扩展功增强功能,且与主应用程序松散耦合
    • 举例:(引用自 www.servicemesh.com)假如有6个微服务相互通信以确定一个包裹的成本.然后这6个微服务每个都需要具有可观察性,监控,日志记录,配置,断路器等功能,而且这6个还具有不止一个进程,作为冗余至少2台.所有这些功能都是根据一些行业标准的第三方库在每个微服务中实现的
    • 上述的这些可观察性,监控,日志记录,配置,熔断,降级等分别编码在这些微服务中,耦合了业务逻辑和这些相同的功能.特别是你的应用程序是用不同的语言编写时会发生什么.比如Golang,Golang有没有这些第三方的可观察性,监控,日志记录,配置,熔断,降级等产品可用呢?仅以Golang举例
    使用sidecar模式的优势
    • 通过抽象出与功能相关的共同基础设施至一个不同层降低了微服务代码的复杂度
    • 分离了应用程序代码和底层平台的耦合
    • 在微服务开发中,将这些功能相同的组件抽象出来,能够降低微服务架构中代码的重复度

    本文内容参考www.servicemesh.com 网站.

    转载于:https://blog.51cto.com/8745668/2366269

    展开全文
  • sidecar 在上一篇博客文章中,我描述了Sidecar应用程序如何用于在Eureka中注册Cassandra节点,更一般地,它可以用于在Eureka中注册任何非JVM应用程序。 在本文中,我将介绍应用程序如何查询Sidecar注册节点。 ...
  • 什么是 Sidecar

    千次阅读 2021-01-24 20:28:29
    Sidecar 是什么 将本将属于应用程序的功能拆分成单独的进程,这个进程可以被理解为Sidecar。在微服务体系内,将集成在应用内的微服务功能剥离到了sidecar内,sidecar提供了微服务发现、注册,服务调用,应用认证,...
  • sidecar-proxy-example 有关Kubernetes Sidecar代理的文章示例应用程序
  • sidecar 容器Kubernetes is an open-source container orchestration engine for automating deployment, scaling, and management of containerized applications. A pod is the basic building block of ...
  • Mongo Kubernetes副本集Sidecar 该项目是一个PoC,用于使用Kubernetes设置MongoDB副本集。 它应该处理任何类型的大小调整,并能适应MongoDB和Kubernetes都可以进入的各种条件。 它是的一个分支,具有(许多)更改...
  • sidecar介绍

    2021-06-30 11:03:43
    https://www.jianshu.com/p/626f9313e2bf https://mosn.io/docs/concept/sidecar-pattern/ https://www.servicemesher.com/blog/sidecar-design-pattern-in-microservices-ecosystem/
  • Sidecar的端点

    2018-06-28 19:17:19
    Sidecar提供了一些端点,这些端点有助于管理Sidecar。1 /该端点返回一个测试页面,该页面展示Sidecar的常用端点。2 /hosts/{serviceId}该端点返回DiscoveryClient.getInstances(serviceId),即指定微服务在Eureka...
  • Mongo Kubernetes Replica Set Sidecar This project is as a PoC to setup a MongoDB replica set using Kubernetes. It should handle resizing of any type and be resilient to the various conditions both ...
  • 了解Sidecar模式

    万次阅读 多人点赞 2019-01-28 23:56:34
    本文介绍Sidecar模式的特点,及其应用的场景。熟悉Native Cloud或者微服务的童鞋应该知道,在云环境下,技术栈可以是多种多样的。那么如何能够将这些异构的服务组件串联起来,成为了服务治理的一个重大课题。而Side...
  • apiVersion: networking.istio.io/v1alpha3 kind: Sidecar metadata: name: default namespace: istio-config spec: egress: - hosts: - "./*" - "istio-system/*"
  • Sidecar详解

    2021-06-25 08:47:21
    Sidecar Sidecar(边车)模式是一种将应用功能从应用本身剥离出来作为单独进程的方式。该模式允许我们向应用无侵入添加多种功能,避免了为满足第三方组件需求而向应用添加额外的配置代码。 在云环境下,技术栈可以是...
  • sidecar学习

    2018-03-09 10:28:00
    1、SideCar的出现  微服务的结构是细粒度的,由多个服务构成,支持不同的服务用不同的语言来编写,比如a服务用python,b服务用java,C服务用php等,我们称为异构语言,那么在利用zuul来代理访问服务的时候,如何...
  • Sidecar模式初识

    千次阅读 2019-02-21 18:50:13
    Sidecar设计模式正在收到越来越多的关注和采用。作为Service Mesh的重要要素,Sidecar模式对于构建高度高度可伸缩、有弹性、安全且可便于监控的微服务架构系统至关重要。而Service Mesh也已经被证明,正在改变企业IT...

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