sig-instrumentation: Start charter document

sig-instrumentation/charter.md

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+# SIG Instrumentation Charter
+
+This charter adheres to the conventions described in the [Kubernetes Charter README] and uses
+the Roles and Organization Management outlined in [sig-governance].
+
+## Scope
+
+Covers best practices for cluster observability through metrics, logging, and
+events across all Kubernetes components and development of relevant components.
+
+### In scope
+
+Coordinating metric requirements of different SIGs for other components through finding common APIs.
+
+[Link to SIG section in sigs.yaml][sigs.yaml].
+
+#### Code, Binaries and Services
+
+- Components required for any Kubernetes cluster in regards to observability.
+- Interfaces/API definitions required for any Kubernetes cluster in regards to observability.
+- Well established but optional components for Kubernetes clusters, if endorsed by member.
+- Guidance for instrumentation in order to ensure consistent and high quality instrumentation of core components.
+
+#### Cross-cutting and Externally Facing Processes
+
+n/a
+
+### Out of scope
+
+- Processing of signals. For example ingesting metrics, logs, events into external systems.
+- Predescribing what error states are.
+
+## Roles and Organization Management
+
+This sig follows adheres to the Roles and Organization Management outlined in [sig-governance]
+and opts-in to updates and modifications to [sig-governance].
+
+### Additional responsibilities of Tech Leads
+
+- No additional responsibilities of Tech Leads
+
+### Deviations from [sig-governance]
+
+- This SIG does not have Chairs.
+
+### Subproject Creation
+
+By SIG Technical Leads
+
+[sig-governance]: sig-governance.md
+[sigs.yaml]: https://github.com/kubernetes/community/blob/master/sigs.yaml#L964-L1018
+[Kubernetes Charter README]: https://github.com/kubernetes/community/blob/master/committee-steering/governance/README.md