fix(opentelemetry-collector): use valid regexp syntax in hostmetrics mount point excludes

The exclude_mount_points patterns used glob syntax (e.g. /dev/*) with
match_type: regexp. While this worked accidentally due to substring
matching in MatchString, the patterns are not valid regexps.

Fix by anchoring with ^ and using .* instead of *, so patterns are
both correct and explicit about intent. Fixes #2216.

Author: Cloud-Architect-Emma

charts/opentelemetry-collector/examples/daemonset-hostmetrics/rendered/configmap-agent.yaml

@@ -63,13 +63,13 @@ data:
             exclude_mount_points:
               match_type: regexp
               mount_points:
-              - /dev/*
-              - /proc/*
-              - /sys/*
-              - /run/k3s/containerd/*
-              - /var/lib/docker/*
-              - /var/lib/kubelet/*
-              - /snap/*
+              - ^/dev/
+              - ^/proc/
+              - ^/sys/
+              - ^/run/k3s/containerd/
+              - ^/var/lib/docker/
+              - ^/var/lib/kubelet/
+              - ^/snap/
           load: null
           memory: null
           network: null

charts/opentelemetry-collector/templates/_config.tpl

@@ -164,13 +164,13 @@ data:
             exclude_mount_points:
               match_type: regexp
               mount_points:
-              - /dev/*
-              - /proc/*
-              - /sys/*
-              - /run/k3s/containerd/*
-              - /var/lib/docker/*
-              - /var/lib/kubelet/*
-              - /snap/*
+              - ^/dev/
+              - ^/proc/
+              - ^/sys/
+              - ^/run/k3s/containerd/
+              - ^/var/lib/docker/
+              - ^/var/lib/kubelet/
+              - ^/snap/
           load: null
           memory: null
           network: null

charts/opentelemetry-demo/examples/bring-your-own-observability/rendered/opentelemetry-collector/configmap-agent.yaml

@@ -169,13 +169,13 @@ data:
             exclude_mount_points:
               match_type: regexp
               mount_points:
-              - /dev/*
-              - /proc/*
-              - /sys/*
-              - /run/k3s/containerd/*
-              - /var/lib/docker/*
-              - /var/lib/kubelet/*
-              - /snap/*
+              - ^/dev/
+              - ^/proc/
+              - ^/sys/
+              - ^/run/k3s/containerd/
+              - ^/var/lib/docker/
+              - ^/var/lib/kubelet/
+              - ^/snap/
           load: null
           memory: null
           network: null

charts/opentelemetry-demo/examples/custom-environment-variables/rendered/opentelemetry-collector/configmap-agent.yaml

@@ -160,13 +160,13 @@ data:
             exclude_mount_points:
               match_type: regexp
               mount_points:
-              - /dev/*
-              - /proc/*
-              - /sys/*
-              - /run/k3s/containerd/*
-              - /var/lib/docker/*
-              - /var/lib/kubelet/*
-              - /snap/*
+              - ^/dev/
+              - ^/proc/
+              - ^/sys/
+              - ^/run/k3s/containerd/
+              - ^/var/lib/docker/
+              - ^/var/lib/kubelet/
+              - ^/snap/
           load: null
           memory: null
           network: null

charts/opentelemetry-demo/examples/default/rendered/opentelemetry-collector/configmap-agent.yaml

@@ -160,13 +160,13 @@ data:
             exclude_mount_points:
               match_type: regexp
               mount_points:
-              - /dev/*
-              - /proc/*
-              - /sys/*
-              - /run/k3s/containerd/*
-              - /var/lib/docker/*
-              - /var/lib/kubelet/*
-              - /snap/*
+              - ^/dev/
+              - ^/proc/
+              - ^/sys/
+              - ^/run/k3s/containerd/
+              - ^/var/lib/docker/
+              - ^/var/lib/kubelet/
+              - ^/snap/
           load: null
           memory: null
           network: null