opencensus: delete opencensus tracer (envoyproxy#37508)

Additional Description: This has been deprecated for several releases,
and the upstream dependency is no longer maintained.
Risk Level: Low; this was marked as deprecated in 1.28 and was supposed
to be removed in 1.30
Fixes envoyproxy#9958
Progress on envoyproxy#11816

---------

Signed-off-by: Greg Greenway <[email protected]>
Co-authored-by: Ryan Northey <[email protected]>

Author: ggreenway

CODEOWNERS

@@ -280,7 +280,6 @@ extensions/filters/http/oauth2 @derekargueta @mattklein123
 # tracers
 /*/extensions/tracers/zipkin @wbpcode @Shikugawa @basvanbeek
 /*/extensions/tracers/dynamic_ot @wbpcode @Shikugawa @basvanbeek
-/*/extensions/tracers/opencensus @wbpcode @Shikugawa @basvanbeek
 /*/extensions/tracers/common @wbpcode @Shikugawa @basvanbeek
 /*/extensions/tracers/common/ot @wbpcode @Shikugawa @basvanbeek
 # ext_authz

api/BUILD

@@ -373,7 +373,6 @@ proto_library(
         "//envoy/service/secret/v3:pkg",
         "//envoy/service/status/v3:pkg",
         "//envoy/service/tap/v3:pkg",
-        "//envoy/service/trace/v3:pkg",
         "//envoy/type/http/v3:pkg",
         "//envoy/type/matcher/v3:pkg",
         "//envoy/type/metadata/v3:pkg",

api/bazel/external_proto_deps.bzl

@@ -12,8 +12,6 @@ EXTERNAL_PROTO_IMPORT_BAZEL_DEP_MAP = {
     "google/api/expr/v1alpha1/checked.proto": "@com_google_googleapis//google/api/expr/v1alpha1:checked_proto",
     "google/api/expr/v1alpha1/syntax.proto": "@com_google_googleapis//google/api/expr/v1alpha1:syntax_proto",
     "io/prometheus/client/metrics.proto": "@prometheus_metrics_model//:client_model",
-    "opencensus/proto/trace/v1/trace.proto": "@opencensus_proto//opencensus/proto/trace/v1:trace_proto",
-    "opencensus/proto/trace/v1/trace_config.proto": "@opencensus_proto//opencensus/proto/trace/v1:trace_config_proto",
     "opentelemetry/proto/common/v1/common.proto": "@opentelemetry_proto//:common",
 }
 
@@ -30,8 +28,6 @@ EXTERNAL_PROTO_GO_BAZEL_DEP_MAP = {
     #    go_googleapis in https://github.com/bazelbuild/rules_go/blob/master/go/dependencies.rst#overriding-dependencies
     "@com_google_googleapis//google/api/expr/v1alpha1:checked_proto": "@org_golang_google_genproto_googleapis_api//expr/v1alpha1",
     "@com_google_googleapis//google/api/expr/v1alpha1:syntax_proto": "@org_golang_google_genproto_googleapis_api//expr/v1alpha1",
-    "@opencensus_proto//opencensus/proto/trace/v1:trace_proto": "@opencensus_proto//opencensus/proto/trace/v1:trace_proto_go",
-    "@opencensus_proto//opencensus/proto/trace/v1:trace_config_proto": "@opencensus_proto//opencensus/proto/trace/v1:trace_and_config_proto_go",
     "@opentelemetry_proto//:trace": "@opentelemetry_proto//:trace_go_proto",
     "@opentelemetry_proto//:logs": "@opentelemetry_proto//:logs_go_proto",
     "@opentelemetry_proto//:metrics": "@opentelemetry_proto//:metrics_go_proto",
@@ -42,8 +38,6 @@ EXTERNAL_PROTO_GO_BAZEL_DEP_MAP = {
 EXTERNAL_PROTO_CC_BAZEL_DEP_MAP = {
     "@com_google_googleapis//google/api/expr/v1alpha1:checked_proto": "@com_google_googleapis//google/api/expr/v1alpha1:checked_cc_proto",
     "@com_google_googleapis//google/api/expr/v1alpha1:syntax_proto": "@com_google_googleapis//google/api/expr/v1alpha1:syntax_cc_proto",
-    "@opencensus_proto//opencensus/proto/trace/v1:trace_proto": "@opencensus_proto//opencensus/proto/trace/v1:trace_proto_cc",
-    "@opencensus_proto//opencensus/proto/trace/v1:trace_config_proto": "@opencensus_proto//opencensus/proto/trace/v1:trace_config_proto_cc",
     "@opentelemetry_proto//:trace": "@opentelemetry_proto//:trace_cc_proto",
     "@opentelemetry_proto//:logs": "@opentelemetry_proto//:logs_cc_proto",
     "@opentelemetry_proto//:metrics": "@opentelemetry_proto//:metrics_cc_proto",

api/bazel/repositories.bzl

@@ -36,9 +36,6 @@ def api_dependencies():
         name = "prometheus_metrics_model",
         build_file_content = PROMETHEUSMETRICS_BUILD_CONTENT,
     )
-    external_http_archive(
-        name = "opencensus_proto",
-    )
     external_http_archive(
         name = "rules_proto",
     )
@@ -85,26 +82,6 @@ go_proto_library(
 )
 """
 
-OPENCENSUSTRACE_BUILD_CONTENT = """
-load("@envoy_api//bazel:api_build_system.bzl", "api_cc_py_proto_library")
-load("@io_bazel_rules_go//proto:def.bzl", "go_proto_library")
-
-api_cc_py_proto_library(
-    name = "trace_model",
-    srcs = [
-        "trace.proto",
-    ],
-    visibility = ["//visibility:public"],
-)
-
-go_proto_library(
-    name = "trace_model_go_proto",
-    importpath = "trace_model",
-    proto = ":trace_model",
-    visibility = ["//visibility:public"],
-)
-"""
-
 ZIPKINAPI_BUILD_CONTENT = """
 
 load("@envoy_api//bazel:api_build_system.bzl", "api_cc_py_proto_library")

api/bazel/repository_locations.bzl

@@ -88,19 +88,6 @@ REPOSITORY_LOCATIONS_SPEC = dict(
         license = "Apache-2.0",
         license_url = "https://github.com/googleapis/googleapis/blob/{version}/LICENSE",
     ),
-    opencensus_proto = dict(
-        project_name = "OpenCensus Proto",
-        project_desc = "Language Independent Interface Types For OpenCensus",
-        project_url = "https://github.com/census-instrumentation/opencensus-proto",
-        version = "0.4.1",
-        sha256 = "e3d89f7f9ed84c9b6eee818c2e9306950519402bf803698b15c310b77ca2f0f3",
-        release_date = "2022-09-23",
-        strip_prefix = "opencensus-proto-{version}/src",
-        urls = ["https://github.com/census-instrumentation/opencensus-proto/archive/v{version}.tar.gz"],
-        use_category = ["api"],
-        license = "Apache-2.0",
-        license_url = "https://github.com/census-instrumentation/opencensus-proto/blob/v{version}/LICENSE",
-    ),
     prometheus_metrics_model = dict(
         project_name = "Prometheus client model",
         project_desc = "Data model artifacts for Prometheus",

api/buf.lock

@@ -17,10 +17,6 @@ deps:
     owner: googleapis
     repository: googleapis
     commit: 62f35d8aed1149c291d606d958a7ce32
-  - remote: buf.build
-    owner: opencensus
-    repository: opencensus
-    commit: bc2645b085534e4f8ebae3ef20088165
   - remote: buf.build
     owner: opentelemetry
     repository: opentelemetry

api/buf.yaml

@@ -1,7 +1,6 @@
 version: v1
 deps:
 - buf.build/googleapis/googleapis:62f35d8aed1149c291d606d958a7ce32
-- buf.build/opencensus/opencensus
 - buf.build/prometheus/client-model
 - buf.build/opentelemetry/opentelemetry
 - buf.build/gogo/protobuf

api/envoy/config/filter/network/http_connection_manager/v2/http_connection_manager.proto

@@ -163,14 +163,6 @@ message HttpConnectionManager {
 
     // Configuration for an external tracing provider.
     // If not specified, no tracing will be performed.
-    //
-    // .. attention::
-    //   Please be aware that *envoy.tracers.opencensus* provider can only be configured once
-    //   in Envoy lifetime.
-    //   Any attempts to reconfigure it or to use different configurations for different HCM filters
-    //   will be rejected.
-    //   Such a constraint is inherent to OpenCensus itself. It cannot be overcome without changes
-    //   on OpenCensus side.
     trace.v2.Tracing.Http provider = 9;
   }
 

api/envoy/config/trace/v2/BUILD

@@ -9,6 +9,5 @@ api_proto_package(
         "//envoy/annotations:pkg",
         "//envoy/api/v2/core:pkg",
         "@com_github_cncf_xds//udpa/annotations:pkg",
-        "@opencensus_proto//opencensus/proto/trace/v1:trace_config_proto",
     ],
 )

api/envoy/config/trace/v2/http_tracer.proto

@@ -41,7 +41,6 @@ message Tracing {
     // - *envoy.tracers.zipkin*
     // - *envoy.tracers.dynamic_ot*
     // - *envoy.tracers.datadog*
-    // - *envoy.tracers.opencensus*
     // - *envoy.tracers.xray*
     string name = 1 [(validate.rules).string = {min_bytes: 1}];
 
@@ -52,7 +51,6 @@ message Tracing {
     // - :ref:`ZipkinConfig <envoy_api_msg_config.trace.v2.ZipkinConfig>`
     // - :ref:`DynamicOtConfig <envoy_api_msg_config.trace.v2.DynamicOtConfig>`
     // - :ref:`DatadogConfig <envoy_api_msg_config.trace.v2.DatadogConfig>`
-    // - :ref:`OpenCensusConfig <envoy_api_msg_config.trace.v2.OpenCensusConfig>`
     // - :ref:`AWS X-Ray <envoy_api_msg_config.trace.v2alpha.XRayConfig>`
     oneof config_type {
       google.protobuf.Struct config = 2 [deprecated = true];