fix: use glob syntax instead of regex in Beyla discovery config (#2485)

* fix: use glob syntax instead of regex in Beyla discovery config

Beyla interprets discovery fields as glob patterns, not regex. The default
config used "." (regex any-char) instead of "*" (glob wildcard) for
k8s_namespace, and regex alternation "|" instead of glob brace alternation
for exe_path exclusions. This caused Beyla to discover zero services and
silently skip exclusions.

Fixes #2484

Co-Authored-By: Claude Opus 4.6 <[email protected]>

* fix: regenerate all rendered outputs with corrected Beyla glob patterns

Co-Authored-By: Claude Opus 4.6 <[email protected]>

* Fix unit test snapshot

Signed-off-by: Pete Wall <[email protected]>

* change services to instrument

Signed-off-by: Pete Wall <[email protected]>

---------

Signed-off-by: Pete Wall <[email protected]>
Co-authored-by: Claude Opus 4.6 <[email protected]>

Author: petewall

charts/k8s-monitoring/charts/feature-auto-instrumentation/templates/_beyla-config.tpl

@@ -22,8 +22,8 @@
   {{- $overrides = merge $overrides (dict "network" (dict "enable" true)) }}
 {{- end }}
 {{- if and (eq (dig "preset" "" $beylaMap) "application") (not (hasKey $config "discovery")) }}
-  {{- $services := list (dict "k8s_namespace" ".") }}
-  {{- $excludeServices := list (dict "exe_path" ".*alloy.*|.*otelcol.*|.*beyla.*") }}
+  {{- $services := list (dict "k8s_namespace" "*") }}
+  {{- $excludeServices := list (dict "exe_path" "{*alloy*,*otelcol*,*beyla*}") }}
   {{- $discovery := dict "instrument" $services "exclude_instrument" $excludeServices }}
   {{- $overrides = merge $overrides (dict "discovery" $discovery) }}
 {{- end }}

charts/k8s-monitoring/docs/examples/exclude-by-namespace/README.md

@@ -74,8 +74,8 @@ autoInstrumentation:
     config:
       data:
         discovery:
-          services:
-            - k8s_namespace: .
+          instrument:
+            - k8s_namespace: "*"
           exclude_services:
             - k8s_namespace: kube-system
             - k8s_namespace: kube-public

charts/k8s-monitoring/docs/examples/exclude-by-namespace/output.yaml

@@ -61,8 +61,8 @@ autoInstrumentation:
     config:
       data:
         discovery:
-          services:
-            - k8s_namespace: .
+          instrument:
+            - k8s_namespace: "*"
           exclude_services:
             - k8s_namespace: kube-system
             - k8s_namespace: kube-public