v0.105.0

This Splunk OpenTelemetry Collector release includes changes from the opentelemetry-collector v0.105.0 and the opentelemetry-collector-contrib v0.105.0 releases where appropriate.

🛑 Breaking changes 🛑

• (Splunk) Don't expand environment variables starting with $$ in configuration files. This behavior was introduced
  in v0.42.0 to support a bug causing double expansion. $$ is treated as an escape sequence representing a literal
  $ character (#5134)
• (Core) service: add service.disableOpenCensusBridge feature gate which is enabled by default to remove the dependency on OpenCensus (#10414)
• (Core) confmap: Promote confmap.strictlyTypedInput feature gate to beta. (#10552)
  This feature gate changes the following:
  • Configurations relying on the implicit type casting behaviors listed on #9532 will start to fail.
  • Configurations using URI expansion (i.e. field: ${env:ENV}) for string-typed fields will use the value passed in ENV verbatim without intermediate type casting.
• (Contrib) stanza: errors from Operator.Process are returned instead of silently ignored. (#33783)
  This public function is affected: https://pkg.go.dev/github.com/open-telemetry/opentelemetry-collector-contrib/pkg/stanza@v0.104.0/operator/helper#WriterOperator.Write
• (Contrib) vcenterreceiver: Enables various vCenter metrics that were disabled by default until v0.105 (#34022)
  The following metrics will be enabled by default "vcenter.host.network.packet.drop.rate",
  "vcenter.vm.cpu.readiness", "vcenter.host.cpu.capacity", and "vcenter.host.cpu.reserved".

🚩Deprecations 🚩

• (Splunk) Deprecate usage of bare environment variables and config sources in configuration files (#5153)
  • Use ${env:VAR} or ${VAR} instead of $VAR.
  • Use ${uri:selector} instead of $uri:selector, e.g. ${file:/path/to/file} instead of $file:/path/to/file.

💡 Enhancements 💡

• (Splunk) Auto Discovery for Linux:
  • Bring SQL Server receiver into the discovery mode (#5109)
  • Bring Cassanda JMX receiver into the discovery mode (#5112)
  • Bring RabbitMQ receiver into the discovery mode (#5051)
• (Splunk) Update bundled OpenJDK to 11.0.24_8 (#5113, #5119)
• (Splunk) Upgrade github.com/hashicorp/vault to v1.17.2 (#5089)
• (Splunk) Upgrade github.com/go-zookeeper/zk to 1.0.4 (#5146)
• (Core) configtls: Mark module as stable. (#9377)
• (Core) confmap: Remove extra closing parenthesis in sub-config error (#10480)
• (Core) configgrpc: Update the default load balancer strategy to round_robin (#10319)
  To restore the behavior that was previously the default, set balancer_name to pick_first.
• (Core) otelcol: Add go module to components subcommand. (#10570)
• (Core) confmap: Add explanation to errors related to confmap.strictlyTypedInput feature gate. (#9532)
• (Core) confmap: Allow using map[string]any values in string interpolation (#10605)
• (Contrib) pkg/ottl: Added Hex() converter function (#31929)
• (Contrib) pkg/ottl: Add IsRootSpan() converter function. (#32918)
  Converter IsRootSpan() returns true if the span in the corresponding context is root, that means its parent_span_id equals to hexadecimal representation of zero. In all other scenarios function returns false.
• (Contrib) vcenterreceiver: Adds additional vCenter resource pool metrics and a memory_usage_type attribute for vcenter.resource_pool.memory.usage metric to use. (#33607)
  Added "vcenter.resource_pool.memory.swapped", "vcenter.resource_pool.memory.ballooned", and "vcenter.resource_pool.memory.granted"
  metrics. Also added an additional attribute, "memory_usage_type" for "vcenter.resource_pool.memory.usage" metric, which is currently under a feature gate.
• (Contrib) kubeletstatsreceiver: Add k8s.pod.memory.node.utilization and k8s.container.memory.node.utilization metrics (#33591)
• (Contrib) vcenterreceiver: Adds vCenter metrics at the datacenter level. (#33607)
  Introduces various datacenter metrics which work by aggregating stats from datastores, clusters, hosts, and VM's.
• (Contrib) processor/resource, processor/attributes: Add an option to extract value from a client address by specifying client.address value in the from_context field. (#34051) (#33607)
• (Contrib) receiver/azuremonitorreceiver: Add support for Managed Identity and Default Credential auth (#31268, #33584)
• (Contrib) azuremonitorreceiver: Add maximum_number_of_records_per_resource config parameter in order to overwrite default (#32165)
• (Contrib) cloudfoundryreceiver: Add support to receive CloudFoundry Logs (#32671)
• (Contrib) cmd/opampsupervisor: Adds support for forwarding custom messages to/from the agent (#33575)
• (Contrib) splunkhecexporter: Increase the performance of JSON marshaling (#34011)
• (Contrib) loadbalancingexporter: Adds a new streamID routingKey, which will route based on the datapoint ID. See updated README for details (#32513)
• (Contrib) dockerobserver: Add hint to error when using float for api_version field (#34043)
• (Contrib) pkg/ottl: Emit traces for statement sequence executions to troubleshoot OTTL statements/conditions (#33433)
• (Contrib) pkg/stanza: Bump 'logs.jsonParserArray' and 'logs.assignKeys' feature gates to beta. (#33948)
  • This enables the feature gates by default to allow use of the json_array_parser and assign_keys operations.
• (Contrib) receiver/filelog: Add filelog.container.removeOriginalTimeField feature-flag for removing original time field (#33946)
• (Contrib) statsdreceiver: Allow configuring summary percentiles (#33701)
• (Contrib) pkg/stanza: Switch to faster json parser lib for container operator (#33929)
• (Contrib) telemetrygen: telemetrygen --rate flag changed from Int64 to Float64 (#33984)
• (Contrib) windowsperfcountersreceiver: windowsperfcountersreceiver now appends an index number to additional instance names that share a name. An example of this is when scraping 
rocess(*) counters with multiple running instances of the same executable. (#32319)
  NOTES
  • This change can expose cardinality issues where the counters were previously collapsed under the non-indexed instance name.
  • The change mimics Windows Performance Monitor behavior: The first instance name remains unchanged, additional instances are suffixed with #<N> where N=1 and is increased for each duplicate.
    • e.g. Given 3 powershell instances, this will return powershell, powershell#1 and powershell#2.

🧰 Bug fixes 🧰

• (Splunk) Auto Discovery for Linux:
  • Fix kafkametrics k8s issues for Auto Discovery (#5103)
  • Reuse discovery receiver's obsreport for receivercreator (#5111)
• (Core) confmap: Fixes issue where confmap could not escape $$ when confmap.unifyEnvVarExpansion is enabled. (#10560)
• (Core) otlpreceiver: Fixes a bug where the otlp receiver's http response was not properly translating grpc error codes to http status codes. (#10574)
• (Core) exporterhelper: Fix incorrect deduplication of otelcol_exporter_queue_size and otelcol_exporter_queue_capacity metrics if multiple exporters are used. (#10444)
• (Core) service/telemetry: Add ability to set service.name for spans emitted by the Collector (#10489)
• (Core) internal/localhostgate: Correctly log info message when component.UseLocalHostAsDefaultHost is enabled (#8510)
• (Contrib) countconnector: Updating the stability to reflect that the component is shipped as part of contrib. (#33903)
• (Contrib) httpcheckreceiver: Updating the stability to reflect that the component is shipped as part of contrib. (#33897)
• (Contrib) probabilisticsamplerprocessor: Fix bug where log sampling was being reported by the counter otelcol_processor_probabilistic_sampler_count_traces_sampled (#33874)
• (Contrib) processor/groupbyattrsprocessor: Fix dropping of metadata fields when processing metrics. (#33419)
• (Contrib) prometheusreceiver: Fix hash computation to include non exported fields like regex in scrape configuration for TargetAllocator (#29313)
• (Contrib) kafkametricsreceiver: Fix issue with incorrect consumer offset (#33309)
• (Contrib) sqlserverreceiver: Enable default metrics to properly trigger SQL Server scrape (#34065)
• (Contrib) syslogreceiver: Allow to define max_octets for octet counting RFC5424 syslog parser (#33182)
• (Contrib) windowsperfcountersreceiver: Metric definitions with no matching performance counter are no longer included as metrics with zero datapoints in the scrape output. (#4972)