Tag dependency

CHANGELOG.md

@@ -6,6 +6,7 @@ The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/).
 ## [Unreleased]
 
 ### Changed
+- Add possibility to set dependency to group of services by tag mechanism
 
 ## [0.19.26]
 

docs/configuration.md

@@ -95,7 +95,7 @@ Property
 
 ## Permissions
 Property                                                                                                                                           | Description                                                                                                                                                                                                                                 | Default value
--------------------------------------------------------------------------------------------------------------------------------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | ---------
+-------------------------------------------------------------------------------------------------------------------------------------------------- |---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------| ---------
 **envoy-control.envoy.snapshot.incoming-permissions.enabled**                                                                                      | Enable incoming permissions                                                                                                                                                                                                                 | false
 **envoy-control.envoy.snapshot.incoming-permissions.client-identity-headers**                                                                      | Headers that identify the client calling the endpoint. In most cases `client-identity-header` should include `service-name-header` value to correctly identify other services in the mesh.                                                  | [ x-service-name ]
 **envoy-control.envoy.snapshot.incoming-permissions.clients-allowed-to-all-endpoints**                                                             | Client names which are allowed to even call service if incoming permissions are enabled.                                                                                                                                                    | empty list
@@ -127,7 +127,7 @@ Property
 **envoy-control.envoy.snapshot.outgoing-permissions.services-allowed-to-use-wildcard**                                                             | Services that are allowed to have wildcard in outgoing.dependency field                                                                                                                                                                     | empty set
 **envoy-control.envoy.snapshot.outgoing-permissions.rbac.clients-lists.default-clients-list**                                                      | List of clients which will be applied to each rbac policy, if none of the lists defined in `custom-clients-lists` have been matched                                                                                                         | empty list
 **envoy-control.envoy.snapshot.outgoing-permissions.rbac.clients-lists.custom-clients-lists**                                                      | Lists of clients which will be applied to each rbac policy, only if key for defined list is present in clients for defined endpoint                                                                                                         | empty map
-
+**envoy-control.envoy.snapshot.outgoing-permissions.tag-prefix**                                                                                   | Value that specify which tags are allowed to be used in dependencies by prefix                                                                                                                                                              | empty string
 ## Load Balancing
 Property                                                                                    | Description                                                                                                                                                                               | Default value
 ------------------------------------------------------------------------------------------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | ---------

docs/features/permissions.md

@@ -24,6 +24,7 @@ metadata:
         - service: service-b
           handleInternalRedirect: true
         - domain: http://www.example.com
+        - tag: tag-a
     incoming:
       endpoints:
         - path: /example

envoy-control-core/src/main/kotlin/pl/allegro/tech/servicemesh/envoycontrol/ControlPlane.kt

@@ -26,6 +26,7 @@ import pl.allegro.tech.servicemesh.envoycontrol.server.callbacks.MetricsDiscover
 import pl.allegro.tech.servicemesh.envoycontrol.services.MultiClusterState
 import pl.allegro.tech.servicemesh.envoycontrol.snapshot.EnvoySnapshotFactory
 import pl.allegro.tech.servicemesh.envoycontrol.snapshot.NoopSnapshotChangeAuditor
+import pl.allegro.tech.servicemesh.envoycontrol.snapshot.RouteSpecificationFactory
 import pl.allegro.tech.servicemesh.envoycontrol.snapshot.SnapshotChangeAuditor
 import pl.allegro.tech.servicemesh.envoycontrol.snapshot.SnapshotUpdater
 import pl.allegro.tech.servicemesh.envoycontrol.snapshot.SnapshotsVersions
@@ -167,7 +168,10 @@ class ControlPlane private constructor(
             val snapshotProperties = properties.envoy.snapshot
             val envoySnapshotFactory = EnvoySnapshotFactory(
                 ingressRoutesFactory = EnvoyIngressRoutesFactory(snapshotProperties, envoyHttpFilters),
-                egressRoutesFactory = EnvoyEgressRoutesFactory(snapshotProperties),
+                egressRoutesFactory = EnvoyEgressRoutesFactory(
+                    snapshotProperties.egress,
+                    snapshotProperties.incomingPermissions
+                ),
                 clustersFactory = EnvoyClustersFactory(snapshotProperties),
                 endpointsFactory = EnvoyEndpointsFactory(
                     snapshotProperties, ServiceTagMetadataGenerator(snapshotProperties.routing.serviceTags)
@@ -176,6 +180,7 @@ class ControlPlane private constructor(
                     snapshotProperties,
                     envoyHttpFilters
                 ),
+                routeSpecificationFactory = RouteSpecificationFactory(snapshotProperties),
                 // Remember when LDS change we have to send RDS again
                 snapshotsVersions = snapshotsVersions,
                 properties = snapshotProperties,

envoy-control-core/src/main/kotlin/pl/allegro/tech/servicemesh/envoycontrol/groups/NodeMetadata.kt

@@ -93,7 +93,13 @@ fun Value?.toHeaderFilter(default: String? = null): HeaderFilterSettings? {
     }
 }
 
-private class RawDependency(val service: String?, val domain: String?, val domainPattern: String?, val value: Value)
+private class RawDependency(
+    val service: String?,
+    val domain: String?,
+    val domainPattern: String?,
+    val tag: String?,
+    val value: Value
+)
 
 fun Value?.toOutgoing(properties: SnapshotProperties): Outgoing {
     val allServiceDependenciesIdentifier = properties.outgoingPermissions.allServicesDependencies.identifier
@@ -133,10 +139,19 @@ fun Value?.toOutgoing(properties: SnapshotProperties): Outgoing {
     val domainPatterns = rawDependencies.filter { it.domainPattern != null }
         .onEach { validateDomainPatternFormat(it) }
         .map { DomainPatternDependency(it.domainPattern.orEmpty(), it.value.toSettings(defaultSettingsFromProperties)) }
+
+    val tags = rawDependencies.filter { it.tag != null }
+        .map {
+            TagDependency(
+                tag = it.tag!!,
+                settings = it.value.toSettings(allServicesDefaultSettings)
+            )
+        }
     return Outgoing(
         serviceDependencies = services,
         domainDependencies = domains,
         domainPatternDependencies = domainPatterns,
+        tagDependencies = tags,
         defaultServiceSettings = allServicesDefaultSettings,
         allServicesDependencies = allServicesDependencies != null
     )
@@ -147,6 +162,7 @@ private fun toRawDependency(it: Value): RawDependency {
     val service = it.field("service")?.stringValue
     val domain = it.field("domain")?.stringValue
     val domainPattern = it.field("domainPattern")?.stringValue
+    val tag = it.field("tag")?.stringValue
     var count = 0
     if (!service.isNullOrBlank()) {
         count += 1
@@ -157,6 +173,9 @@ private fun toRawDependency(it: Value): RawDependency {
     if (!domainPattern.isNullOrBlank()) {
         count += 1
     }
+    if (!tag.isNullOrBlank()) {
+        count += 1
+    }
     if (count != 1) {
         throw NodeMetadataValidationException(
             "Define one of: 'service', 'domain' or 'domainPattern' as an outgoing dependency"
@@ -166,6 +185,7 @@ private fun toRawDependency(it: Value): RawDependency {
         service = service,
         domain = domain,
         domainPattern = domainPattern,
+        tag = tag,
         value = it
     )
 }
@@ -487,27 +507,30 @@ data class Outgoing(
     private val serviceDependencies: List<ServiceDependency> = emptyList(),
     private val domainDependencies: List<DomainDependency> = emptyList(),
     private val domainPatternDependencies: List<DomainPatternDependency> = emptyList(),
+    private val tagDependencies: List<TagDependency> = emptyList(),
     val allServicesDependencies: Boolean = false,
     val defaultServiceSettings: DependencySettings = DependencySettings()
 ) {
 
     // not declared in primary constructor to exclude from equals(), copy(), etc.
-    private val deduplicatedDomainDependencies: List<DomainDependency> = domainDependencies
-        .map { it.domain to it }
-        .toMap().values.toList()
+    private val deduplicatedDomainDependencies: List<DomainDependency> =
+        domainDependencies.associateBy { it.domain }.values.toList()
+
+    private val deduplicatedServiceDependencies: List<ServiceDependency> =
+        serviceDependencies.associateBy { it.service }.values.toList()
 
-    private val deduplicatedServiceDependencies: List<ServiceDependency> = serviceDependencies
-        .map { it.service to it }
-        .toMap().values.toList()
+    private val deduplicatedDomainPatternDependencies: List<DomainPatternDependency> =
+        domainPatternDependencies.associateBy { it.domainPattern }.values.toList()
 
-    private val deduplicatedDomainPatternDependencies: List<DomainPatternDependency> = domainPatternDependencies
-        .map { it.domainPattern to it }
-        .toMap().values.toList()
+    private val deduplicatedTagDependency: List<TagDependency> =
+        tagDependencies.associateBy { it.tag }.values.toList()
 
     fun getDomainDependencies(): List<DomainDependency> = deduplicatedDomainDependencies
     fun getServiceDependencies(): List<ServiceDependency> = deduplicatedServiceDependencies
     fun getDomainPatternDependencies(): List<DomainPatternDependency> = deduplicatedDomainPatternDependencies
 
+    fun getTagDependencies(): List<TagDependency> = deduplicatedTagDependency
+
     data class TimeoutPolicy(
         val idleTimeout: Duration? = null,
         val connectionIdleTimeout: Duration? = null,
@@ -569,6 +592,20 @@ data class DomainPatternDependency(
     override fun useSsl() = DEFAULT_HTTPS_POLICY
 }
 
+data class TagDependency(
+    val tag: String,
+    val settings: DependencySettings = DependencySettings()
+) : Dependency {
+    companion object {
+        private const val DEFAULT_HTTP_PORT = 80
+        private const val DEFAULT_HTTPS_POLICY = false
+    }
+
+    override fun getPort() = DEFAULT_HTTP_PORT
+
+    override fun useSsl() = DEFAULT_HTTPS_POLICY
+}
+
 data class DependencySettings(
     val handleInternalRedirect: Boolean = false,
     val timeoutPolicy: Outgoing.TimeoutPolicy = Outgoing.TimeoutPolicy(),

envoy-control-core/src/main/kotlin/pl/allegro/tech/servicemesh/envoycontrol/groups/NodeMetadataValidator.kt

@@ -18,6 +18,10 @@ class AllDependenciesValidationException(serviceName: String?) : NodeMetadataVal
     "Blocked service $serviceName from using all dependencies. Only defined services can use all dependencies"
 )
 
+class TagDependencyValidationException(serviceName: String?, tags: List<String>) : NodeMetadataValidationException(
+    "Blocked service $serviceName from using tag dependencies $tags. Only allowed tags are supported."
+)
+
 class WildcardPrincipalValidationException(serviceName: String?) : NodeMetadataValidationException(
     "Blocked service $serviceName from allowing everyone in incoming permissions. " +
         "Only defined services can use that."
@@ -99,17 +103,26 @@ class NodeMetadataValidator(
         if (!properties.outgoingPermissions.enabled) {
             return
         }
-        validateEndpointPermissionsMethods(metadata)
         if (hasAllServicesDependencies(metadata) && !isAllowedToHaveAllServiceDependencies(metadata)) {
             throw AllDependenciesValidationException(metadata.serviceName)
         }
+        if (properties.outgoingPermissions.tagPrefix.isNotBlank()) {
+            val unsupportedTags = metadata.proxySettings.outgoing.getTagDependencies()
+                .filter { !it.tag.startsWith(properties.outgoingPermissions.tagPrefix) }
+                .map { it.tag }
+            if (unsupportedTags.isNotEmpty()) {
+                throw TagDependencyValidationException(metadata.serviceName, unsupportedTags)
+            }
+        }
     }
 
     private fun validateIncomingEndpoints(metadata: NodeMetadata) {
         if (!properties.incomingPermissions.enabled) {
             return
         }
 
+        validateEndpointPermissionsMethods(metadata)
+
         metadata.proxySettings.incoming.endpoints.forEach { incomingEndpoint ->
             val clients = incomingEndpoint.clients.map { it.name }