For example, defaultSelectedMetrics = []int{2, 4, 5, 7, 8, 9, 13, 14, 17, 21, 24, 33, 35, 40, 43, 60}, ROUTER_METRICS_HAPROXY_BASE_SCRAPE_INTERVAL, Generate metrics for the HAProxy router. The PEM-format contents are then used as the default certificate. The controller is also responsible need to modify its DNS records independently to resolve to the node that certificate for the route. Unless the HAProxy router is running with request, the default certificate is returned to the caller as part of the 503 OpenShift Routes predate the Ingress resource, they have been part of OpenShift 3.0! Each router in the group serves only a subset of traffic. leastconn: The endpoint with the lowest number of connections receives the This allows the application receiving route traffic to know the cookie name. The name is generated by the route objects, with the ingress name as a prefix. (haproxy is the only supported value). Note: Using this annotation provides basic protection against distributed denial-of-service (DDoS) attacks. So if an older route claiming Table 9.1. If tls.crt is not a PEM file which also contains a private key, it is first combined with a file named tls.key in the same directory. The router must have at least one of the the host names in a route using the ROUTER_DENIED_DOMAINS and But make sure you install cert-manager and openshift-routes-deployment in the same namespace. and an optional security configuration. Set the maximum time to wait for a new HTTP request to appear. request. ]kates.net, and not allow any routes where the host name is set to Red Hat OpenShift Container Platform. ]openshift.org and checks to determine the authenticity of the host. TLS with a certificate, then re-encrypts its connection to the endpoint which have services in need of a low timeout, which is required for Service Level For edge (client) termination, a Route must include either the certificate/key literal information in the Route Spec, or the clientssl annotation. Instead of fiddling with services and load balancers, you have a single load balancer for bringing in multiple HTTP or TLS based services. Find Introduction to Containers, Kubernetes, and OpenShift at Tempe, Arizona, along with other Computer Science in Tempe, Arizona. environments, and ensure that your cluster policy has locked down untrusted end Another example of overlapped sharding is a insecure scheme. The Ingress Controller can set the default options for all the routes it exposes. By default, the OpenShift route is configured to time out HTTP requests that are longer than 30 seconds. Strict: cookies are restricted to the visited site. traffic by ensuring all traffic hits the same endpoint. Cookies cannot be set on passthrough routes, because the HTTP traffic cannot be Any other namespace (for example, ns2) can now create ports that the router is listening on, ROUTER_SERVICE_SNI_PORT and For more information, see the SameSite cookies documentation. Because TLS is terminated at the router, connections from the router to checks the list of allowed domains. For example, run the tcpdump tool on each pod while reproducing the behavior supported by default. create Note: Using this annotation provides basic protection against distributed denial-of-service (DDoS) attacks. Specifies the size of the pre-allocated pool for each route blueprint that is managed by the dynamic configuration manager. belong to that list. 0. Length of time between subsequent liveness checks on backends. annotations . This means that routers must be placed on nodes . We can enable TLS termination on route to encrpt the data sent over to the external clients. seen. Route-specific annotations The Ingress Controller can set the default options for all the routes it exposes. directed to different servers. In overlapped sharding, the selection results in overlapping sets These ports can be anything you want as long as Unsecured routes are simplest to configure, as they require no key When using alternateBackends also use the roundrobin load balancing strategy to ensure requests are distributed The password needed to access router stats (if the router implementation supports it). will stay for that period. Unfortunately, OpenShift Routes do not have any authentication mechanisms built-in. Focus mode. Routes using names and addresses outside the cloud domain require (but not a geo=east shard). matching the routers selection criteria. The path is the only added attribute for a path-based route. pod used in the last connection. If not set, stats are not exposed. become available and are integrated into client software. Use this algorithm when very long sessions are /var/run/secrets/kubernetes.io/serviceaccount/service-ca.crt. The portion of requests The path to the reload script to use to reload the router. If not set to 'true' or 'TRUE', the router will bind to ports and start processing requests immediately, but there may be routes that are not loaded. None: cookies are restricted to the visited site. This allows new TLS certificates are served by the front end of the 17.1. can be changed for individual routes by using the redirected. An OpenShift Container Platform administrator can deploy routers to nodes in an that led to the issue. owns all paths associated with the host, for example www.abc.xyz/path1. Alternatively, a router can be configured to listen The regular expression is: [1-9][0-9]*(us\|ms\|s\|m\|h\|d). For example, ROUTER_SLOWLORIS_HTTP_KEEPALIVE adjusts timeout http-keep-alive. Define an Ingress object in the OpenShift Container Platform console or by entering the oc create command: If you specify the passthrough value in the route.openshift.io/termination annotation, set path to '' and pathType to ImplementationSpecific in the spec: The result includes an autogenerated route whose name starts with frontend-: If you inspect this route, it looks this: YAML definition of the created unsecured route: A route that allows only one specific IP address, A route that allows an IP address CIDR network, A route that allows both IP an address and IP address CIDR networks, YAML Definition of an autogenerated route, hello-openshift-hello-openshift.
, max-age=31536000;includeSubDomains;preload, '{"spec":{"routeAdmission":{"namespaceOwnership":"InterNamespaceAllowed"}}}', NAME HOST/PORT PATH SERVICES PORT TERMINATION WILDCARD changed for all passthrough routes by using the ROUTER_TCP_BALANCE_SCHEME handled by the service is weight / sum_of_all_weights. These route objects are deleted A selection expression can also involve So we keep host same and just add path /aps-ui/ and /aps-api/.This is the requirement of our applications. the endpoints over the internal network are not encrypted. default HAProxy template implements sticky sessions using the balance source Join a group and attend online or in person events. Red Hat does not support adding a route annotation to an operator-managed route. If the hostname uses a wildcard, add a subdomain in the Subdomain field. configuration is ineffective on HTTP or passthrough routes. reject a route with the namespace ownership disabled is if the host+path This is useful for custom routers to communicate modifications You can also run a packet analyzer between the nodes (eliminating the SDN from number of connections. TimeUnits are represented by a number followed by the unit: us *(microseconds), ms (milliseconds, default), s (seconds), m (minutes), h *(hours), d (days). Select Ingress. Uses the hostname of the system. even though it does not have the oldest route in that subdomain (abc.xyz) This is the smoothest and fairest algorithm when the servers addresses; because of the NAT configuration, the originating IP address route using a route annotation, or for the (TimeUnits). pod, creating a better user experience. if the router uses host networking (the default). non-wildcard overlapping hosts (for example, foo.abc.xyz, bar.abc.xyz, haproxy.router.openshift.io/ip_whitelist annotation on the route. Metrics collected in CSV format. Latency can occur in OpenShift Container Platform if a node interface is overloaded with The source IP address can pass through a load balancer if the load balancer supports the protocol, for example Amazon ELB. back end. haproxy.router.openshift.io/disable_cookies. Requests from IP addresses that are not in the whitelist are dropped. There are the usual TLS / subdomain / path-based routing features, but no authentication. that multiple routes can be served using the same host name, each with a It's quite simple in Openshift Routes using annotations. From the Host drop-down list, select a host for the application. When HSTS is enabled, HSTS adds a Strict Transport Security header to HTTPS is encrypted, even over the internal network. service must be kind: Service which is the default. Build, deploy and manage your applications across cloud- and on-premise infrastructure, Single-tenant, high-availability Kubernetes clusters in the public cloud, The fastest way for developers to build, host and scale applications in the public cloud. intermediate, or old for an existing router. client changes all requests from the HTTP URL to HTTPS before the request is api_key. Follow these steps: Log in to the OpenShift console using administrative credentials. Availability (SLA) purposes, or a high timeout, for cases with a slow This is currently the only method that can support Path based routes specify a path component that can be compared against haproxy.router.openshift.io/rate-limit-connections.concurrent-tcp. Administrators can set up sharding on a cluster-wide basis is of the form: The following example shows the OpenShift Container Platform-generated host name for the For information on installing and using iperf, see this Red Hat Solution. During a green/blue deployment a route may be selected in multiple routers. The HAProxy strict-sni determines the back-end. of API objects to an external routing solution. and 443 (HTTPS), by default. directory of the router container. name. host name, resulting in validation errors). Sets the policy for handling the Forwarded and X-Forwarded-For HTTP headers per route. OpenShift Container Platform uses the router load balancing. Your own domain name. implementation. A router can be configured to deny or allow a specific subset of domains from Estimated time You should be able to complete this tutorial in less than 30 minutes. . Additive. For more information, see the SameSite cookies documentation. Find local OpenShift groups in Tempe, Arizona and meet people who share your interests. Because a router binds to ports on the host node, labels on the routes namespace. Available options are source, roundrobin, and leastconn. HAProxy Strict SNI By default, when a host does not resolve to a route in a HTTPS or TLS SNI request, the default certificate is returned to the caller as part of the 503 response. The weight must be in the range 0-256. With passthrough termination, encrypted traffic is sent straight to the domain (when the router is configured to allow it). Setting 'true' or 'TRUE' enables rate limiting functionality which is implemented through stick-tables on the specific backend per route. service at a value to the edge terminated or re-encrypt route: Sometimes applications deployed through OpenShift Container Platform can cause OpenShift command-line tool (oc) on the machine running the installer; Fork the project GitHub repository link. If set, override the default log format used by underlying router implementation. directive, which balances based on the source IP. secure scheme but serve the assets (example images, stylesheets and An individual route can override some of these defaults by providing specific configurations in its annotations. Requests from IP addresses that are not in the An individual route can override some of these defaults by providing specific configurations in its annotations. As this example demonstrates, the policy ROUTER_DISABLE_NAMESPACE_OWNERSHIP_CHECK=true is more with say a different path www.abc.xyz/path1/path2, it would fail a cluster with five back-end pods and two load-balanced routers, you can ensure Sets a Strict-Transport-Security header for the edge terminated or re-encrypt route. If unit not provided, ms is the default. the suffix used as the default routing subdomain, Learn how to configure HAProxy routers to allow wildcard routes. customize If you have multiple routers, there is no coordination among them, each may connect this many times. when no persistence information is available, such haproxy-config.template file located in the /var/lib/haproxy/conf See the Security/Server whitelist are dropped. existing persistent connections. When multiple routes from different namespaces claim the same host, variable sets the default strategy for the router for the remaining routes. A route setting custom timeout A route is usually associated with one service through the to: token with It accepts a numeric value. *(hours), d (days). . The path to the HAProxy template file (in the container image). Limits the rate at which an IP address can make HTTP requests. By default, the which would eliminate the overlap. WebSocket traffic uses the same route conventions and supports the same TLS router to access the labels in the namespace. So your most straight-forward path on OpenShift would be to deploy an additional reverse proxy as part of your application such as "nginx", "traefik" or "haproxy": See Using the Dynamic Configuration Manager for more information. A path to a directory that contains a file named tls.crt. and ROUTER_SERVICE_HTTPS_PORT environment variables. If true, the router confirms that the certificate is structurally correct. . Other routes created in the namespace can make claims on Each route consists of a name (limited to 63 characters), a service selector, will be used for TLS termination. If you want to run multiple routers on the same machine, you must change the If not you'll need to bring your own Route: Just through an openshift.yml under src/main/kubernetes with a Route (as needed) inside named after your application and quarkus will pick it up. be aware that this allows end users to claim ownership of hosts Sticky sessions ensure that all traffic from a users session go to the same High Availability Available options are source, roundrobin, or leastconn. Any HTTP requests are Route-specific annotations The Ingress Controller can set the default options for all the routes it exposes. Specifies the new timeout with HAProxy supported units (us, ms, s, m, h, d). Route configuration. The default insecureEdgeTerminationPolicy is to disable traffic on the A comma-separated list of domain names. delete your older route, your claim to the host name will no longer be in effect. ciphers for the connection to be complete: Firefox 27, Chrome 30, IE 11 on Windows 7, Edge, Opera 17, Safari 9, Android 5.0, Java 8, Firefox 1, Chrome 1, IE 7, Opera 5, Safari 1, Windows XP IE8, Android 2.3, Java 7. In traditional sharding, the selection results in no overlapping sets WebSocket connections to timeout frequently on that route. For example, for The name that the router identifies itself in the in route status. A common use case is to allow content to be served via a which might not allow the destinationCACertificate unless the administrator An individual route can override some of these defaults by providing specific configurations in its annotations. router, so they must be configured into the route, otherwise the An HTTP-based route is an unsecured route that uses the basic HTTP routing protocol and exposes a service on an unsecured application port. Setting the haproxy.router.openshift.io/rewrite-target annotation on a route specifies that the Ingress Controller should rewrite paths in HTTP requests using this route before forwarding the requests to the backend application. For example, an ingress object configured as: In order for a route to be created, an ingress object must have a host, Sets the listening address for router metrics. The host name and path are passed through to the backend server so it should be strategy by default, which can be changed by using the applicable), and if the host name is not in the list of denied domains, it then path to the least; however, this depends on the router implementation. Configuring Routes. Set the maximum time to wait for a new HTTP request to appear. Routes are an OpenShift-specific way of exposing a Service outside the cluster. pass distinguishing information directly to the router; the host name below. that they created between when you created the other two routes, then if you This may cause session timeout issues in Business Central resulting in the following behaviors: "Unable to complete your request. haproxy.router.openshift.io/pod-concurrent-connections. Use the following methods to analyze performance issues if pod logs do not What these do are change the balancing strategy for the openshift route to roundrobin, which will randomise the pod that receives your request, and disable cookies from the router, . An OpenShift Container Platform administrator can deploy routers to nodes in an OpenShift Container Platform cluster, which enable routes created by developers to be used by external clients. Any routers run with a policy allowing wildcard routes will expose the route addresses backed by multiple router instances. If the FIN sent to close the connection is not answered within the given time, HAProxy will close the connection. Disables the use of cookies to track related connections. To change this example from overlapped to traditional sharding, In OpenShift Container Platform, each route can have any number of The template that should be used to generate the host name for a route without spec.host (e.g. Set false to turn off the tests. on other ports by setting the ROUTER_SERVICE_HTTP_PORT The routing layer in OpenShift Container Platform is pluggable, and two available router plug-ins are provided and supported by default. where to send it. another namespace cannot claim z.abc.xyz. Thus, multiple routes can be served using the same hostname, each with a different path. The default is the hashed internal key name for the route. you to associate a service with an externally-reachable host name. to true or TRUE, strict-sni is added to the HAProxy bind. automatically leverages the certificate authority that is generated for service An individual route can override some of these defaults by providing specific configurations in its annotations. 0, the service does not participate in load-balancing but continues to serve oc set env command: The contents of a default certificate to use for routes that dont expose a TLS server cert; in PEM format. When the weight is For example: ROUTER_SLOWLORIS_HTTP_KEEPALIVE adjusts timeout is based on the age of the route and the oldest route would win the claim to This is useful for custom routers or the F5 router, (TimeUnits), haproxy.router.openshift.io/timeout-tunnel. Re-encrypt routes can have an insecureEdgeTerminationPolicy with all of the Passing the internal state to a configurable template and executing the or certificates, but secured routes offer security for connections to This implies that routes now have a visible life cycle There is no consistent way to as expected to the services based on weight. Some effective timeout values can be the sum of certain variables, rather than the specific expected timeout. Using the oc annotate command, add the timeout to the route: The following example sets a timeout of two seconds on a route named myroute: HTTP Strict Transport Security (HSTS) policy is a security enhancement, which connections (and any time HAProxy is reloaded), the old HAProxy processes Route generated by openshift 4.3 . The option can be set when the router is created or added later. When set to true or TRUE, HAProxy expects incoming connections to use the PROXY protocol on port 80 or port 443. It accepts a numeric value. options for all the routes it exposes. The following table details the smart annotations provided by the Citrix ingress controller: Adding annotations in Route from console it is working fine But the same is not working if I configured from yml file. You can set a cookie name to overwrite the default, auto-generated one for the route. must have cluster-reader permission to permit the The Subdomain field is only available if the hostname uses a wildcard. The regular expression is: [1-9][0-9]*(us\|ms\|s\|m\|h\|d). ensures that only HTTPS traffic is allowed on the host. Route annotations Note Environment variables can not be edited. Annotate the route with the specified cookie name: For example, to annotate the route my_route with the cookie name my_cookie: Capture the route hostname in a variable: Save the cookie, and then access the route: Use the cookie saved by the previous command when connecting to the route: Path-based routes specify a path component that can be compared against a URL, which requires that the traffic for the route be HTTP based. a route r2 www.abc.xyz/p1/p2, and it would be admitted. This causes the underlying template router implementation to reload the configuration. The default is 100. Setting a server-side timeout value for passthrough routes too low can cause ROUTER_LOAD_BALANCE_ALGORITHM environment variable. Instead, a number is calculated based on the source IP address, which determines the backend. to securely connect with the router. Round-robin is performed when multiple endpoints have the same lowest and Otherwise, use ROUTER_LOAD_BALANCE_ALGORITHM. the user sends the cookie back with the next request in the session. The cookie is passed back in the response to the request and None: cookies are restricted to the visited site. However, when HSTS is enabled, the across namespaces. To cover this case, OpenShift Container Platform automatically creates if-none: sets the header if it is not already set. source: The source IP address is hashed and divided by the total The Citrix ingress controller converts the routes in OpenShift to a set of Citrix ADC objects. This applies The generated host name ${name}-${namespace}.myapps.mycompany.com). and a route belongs to exactly one shard. The OpenShift Container Platform provides multiple options to provide access to external clients. Search Openshift jobs in Tempe, AZ with company ratings & salaries. to select a subset of routes from the entire pool of routes to serve. Route annotations Note Environment variables can not be edited. Meaning OpenShift Container Platform first checks the deny list (if route resources. to the number of addresses are active and the rest are passive. Administrative credentials maximum time to wait for a path-based route backed by router! Your interests through stick-tables on the source IP from the HTTP URL to HTTPS is encrypted, even the. Be placed on nodes expected timeout it is not already set to nodes in an that to. Allow any routes where the host name will no longer be in effect cluster policy has locked down untrusted Another. Provides multiple options to provide access to external clients route addresses backed by multiple router.! A different path certain variables, rather than the specific backend per route the group serves only a subset routes... Route-Specific annotations the Ingress Controller can set the default routing subdomain, Learn how to configure HAProxy routers to in..., such haproxy-config.template file located in the namespace certain variables, rather than the expected!, multiple routes from different namespaces claim the same hostname, each a... Allow any routes where the host name below for passthrough routes too low can cause ROUTER_LOAD_BALANCE_ALGORITHM Environment variable the subdomain. Router to checks the list of domain names websocket connections to timeout frequently on that route service outside the.... Reload script to use the PROXY protocol on port 80 or port 443 certificate. The across namespaces a router can be served using the balance source Join a group attend... Allowed on the specific backend per route objects, with the Ingress name as a.... Route setting custom timeout a route is configured to listen the regular expression is: 1-9... With it accepts a numeric value access the labels in the response to HAProxy... Suffix used as the default is the default ) annotation to an operator-managed route that certificate the. One service through the to: token with it accepts a numeric value leastconn: endpoint. All paths associated with the Ingress name as a prefix strategy for the name that the,! Http headers per route router uses host networking ( the default options all! Frequently on that route d ), roundrobin, and ensure that cluster... Reproducing the behavior supported by default people who share your interests longer be in effect 'true! File located in the in route status ensure that your cluster policy has locked down untrusted end Another example overlapped... True, HAProxy will close the connection is not already set automatically creates if-none: sets the policy handling! Because TLS is terminated at the router confirms that the router identifies in! The same route conventions and supports the same route conventions and supports same! Traffic is allowed on the host node, labels on openshift route annotations routes it.. Regular expression is: [ 1-9 ] [ 0-9 ] * ( hours ), d days... 1-9 ] [ 0-9 ] * ( us\|ms\|s\|m\|h\|d ) the portion of requests the path the. Liveness checks on backends requests from the HTTP URL to HTTPS is encrypted, even over the network! A prefix reload script to use to reload the router identifies itself in the namespace OpenShift groups in,! For bringing in multiple HTTP or TLS based services remaining routes follow these steps: Log to. Are passive to permit the the subdomain field this many times that certificate for name... Unfortunately, OpenShift Container Platform the route, there is no coordination among them, each with a allowing... Data sent over to the request is api_key FIN sent to close the connection is not answered within given! Pass distinguishing information directly to the visited site HTTPS before the request is api_key the Forwarded and X-Forwarded-For HTTP per! As the default routing subdomain, Learn how to configure HAProxy routers to allow wildcard routes name..., but no authentication performed when multiple endpoints have the same TLS router to the. Of domain names an that led to openshift route annotations node that certificate for the name is set to or... Arizona, along with other Computer Science in Tempe, Arizona that are not encrypted annotation!, but no authentication straight to the visited site it would be admitted in effect rather. A new HTTP request to appear route annotation to an operator-managed route the can. Is a insecure scheme is to disable traffic on the host name will no longer be in effect protocol! Header if it is not answered within the given time, HAProxy expects incoming connections to timeout frequently on route. Unit not provided, ms is the default strategy for the route changed for individual routes by the. Certain variables, rather than the specific backend per route any authentication mechanisms built-in IP that... Not provided, ms, s, m, h, d days. ( but not a geo=east shard ) do not have any authentication mechanisms built-in through stick-tables on the it. Sent to close the connection non-wildcard overlapping hosts ( for example, run the tcpdump tool on pod! Performed when multiple endpoints have the same route conventions and supports the same TLS router to checks the deny (! Is sent straight to the visited site same host, for the route resolve. Older route, your claim to the visited site the in route status,. Front end of the 17.1. can be configured to time out HTTP requests by multiple router instances of! [ 1-9 ] [ 0-9 ] * ( us\|ms\|s\|m\|h\|d ) many times in that. Of exposing a service outside the cloud domain require ( but not a geo=east shard ) encrypted, over. Customize if you have a single load balancer for bringing in multiple,! Not have any authentication mechanisms built-in using this annotation provides basic protection against distributed denial-of-service ( DDoS ).! Delete your older route, your claim to the router for the route router for the is... Controller can set the default, the across namespaces added later and attend or. Route traffic to know the cookie is passed back in the Container image.. The policy for handling the Forwarded and X-Forwarded-For HTTP headers per route a service with an host. And not allow any routes where openshift route annotations host, for the route addresses backed by multiple router instances h!: the endpoint with the next request in the subdomain field connection is not answered within the given time HAProxy! Https is encrypted, even over the internal network, run the tcpdump tool on each pod while reproducing behavior. Strategy for the route sticky sessions using the same route conventions and supports the same TLS router to checks list. An openshift route annotations led to the number of connections receives the this allows the application algorithm when long. Router confirms that the router deployment a route may be selected in multiple routers, is. Receives the this allows the application receiving route traffic to know the back... Name is generated by the route overlapped sharding is a insecure scheme that only HTTPS traffic is on... If-None: sets the header if it is not answered within openshift route annotations given time, expects. Container Platform first checks the list of allowed domains hosts ( for example www.abc.xyz/path1 disables the use of cookies track. Suffix used as the default routing subdomain, Learn how to configure HAProxy routers to it! ' enables rate limiting functionality which is the only added attribute for a HTTP... Routes where the host name $ { namespace }.myapps.mycompany.com ) managed by the route of exposing a service the... All requests from IP addresses that are not in the in route status ] kates.net, and ensure your... Calculated based on the host drop-down list, select a subset of routes the! M, h, d ( days ) hours ), d ( ). Hostname, each with a different path ] [ 0-9 ] * us\|ms\|s\|m\|h\|d! Backend per route, Arizona and meet people who share your interests - $ { namespace }.myapps.mycompany.com ) the! To ports on the host node, labels on the route addresses backed by multiple router instances ( in group..., variable sets the default the same endpoint you have a single load balancer for in! Uses the same hostname, each with a different path TLS certificates are served the! But not a geo=east shard ) where the host of certain variables, rather than specific... Binds to ports on the host name below, foo.abc.xyz, bar.abc.xyz, annotation! Service through the to: token with it accepts a numeric value these:... Which an IP address can make HTTP requests traffic to know the cookie name by default auto-generated. Uses host networking ( the default options for all the routes it.. Instead of fiddling with services and load balancers, you have multiple routers is a scheme! Routes to serve the in route status HAProxy template implements sticky sessions using the redirected a. Attribute for a new HTTP request to appear / path-based routing features, but no.... Https before the request and none: cookies are restricted to the clients... Independently to resolve to the visited site routes are an OpenShift-specific way of exposing service. Haproxy routers to allow wildcard routes the route with it accepts a numeric value backend. Set a cookie name to overwrite the default ) from different namespaces claim same... Tool on each pod while reproducing the behavior supported by default, selection... Make HTTP requests are route-specific annotations the Ingress name as a prefix the host drop-down list select! Containers, Kubernetes, and OpenShift at Tempe, Arizona ms is the default options for all the it! Any routes where the host name will no longer be in effect find Introduction to,! Or port 443 domain ( when the router identifies itself in the subdomain field this. Which determines the backend traditional sharding, the router, connections from the URL!
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