[deploy/kubernetes]: add info about hostPID for Universal Profiling

#4081 removed hostPID. Add comment that this setting is essential for Universal Profiling.

Signed-off-by: Florian Lehner <[email protected]>

Author: florianl

changelog/fragments/1758890389-k8s-daemonset-up.yaml

@@ -0,0 +1,32 @@
+# Kind can be one of:
+# - breaking-change: a change to previously-documented behavior
+# - deprecation: functionality that is being removed in a later release
+# - bug-fix: fixes a problem in a previous version
+# - enhancement: extends functionality but does not break or fix existing behavior
+# - feature: new functionality
+# - known-issue: problems that we are aware of in a given version
+# - security: impacts on the security of a product or a user’s deployment.
+# - upgrade: important information for someone upgrading from a prior version
+# - other: does not fit into any of the other categories
+kind: bug-fix 
+
+# Change summary; a 80ish characters long description of the change.
+summary: add info about hostPID for Universal Profiling
+
+# Long description; in case the summary is not enough to describe the change
+# this field accommodate a description without length limits.
+# NOTE: This field will be rendered only for breaking-change and known-issue kinds at the moment.
+#description:
+
+# Affected component; usually one of "elastic-agent", "fleet-server", "filebeat", "metricbeat", "auditbeat", "all", etc.
+component: "elastic-agent"
+
+# PR URL; optional; the PR number that added the changeset.
+# If not present is automatically filled by the tooling finding the PR where this changelog fragment has been added.
+# NOTE: the tooling supports backports, so it's able to fill the original PR number instead of the backport PR number.
+# Please provide it if you are adding a fragment for a different PR.
+#pr: https://github.com/owner/repo/1234
+
+# Issue URL; optional; the GitHub issue related to this changeset (either closes or is part of).
+# If not present is automatically filled by the tooling with the issue linked to the PR number.
+#issue: https://github.com/owner/repo/1234

deploy/kubernetes/elastic-agent-kustomize/default/elastic-agent-managed/base/elastic-agent-managed-daemonset.yaml

@@ -23,6 +23,10 @@ spec:
         - key: node-role.kubernetes.io/master
           effect: NoSchedule
       serviceAccountName: elastic-agent
+      # The following setting is needed for Universal Profiling to observe all processes on the host
+      # and produce userspace frames.
+      # If you are using the Universal Profiling integration, please uncomment the following line before applying.
+      # hostPID: true
       hostNetwork: true
       # The following setting is needed for Universal Profiling to allow to set procMount to "Unmasked".
       # If you are using the Universal Profiling integration, please uncomment the following line before applying.

deploy/kubernetes/elastic-agent-kustomize/default/elastic-agent-standalone/base/elastic-agent-standalone-daemonset.yaml

@@ -23,6 +23,10 @@ spec:
         - key: node-role.kubernetes.io/master
           effect: NoSchedule
       serviceAccountName: elastic-agent-standalone
+      # The following setting is needed for Universal Profiling to observe all processes on the host
+      # and produce userspace frames.
+      # If you are using the Universal Profiling integration, please uncomment the following line before applying.
+      # hostPID: true
       hostNetwork: true
       # The following setting is needed for Universal Profiling to allow to set procMount to "Unmasked".
       # If you are using the Universal Profiling integration, please uncomment the following line before applying.

deploy/kubernetes/elastic-agent-kustomize/ksm-autosharding/elastic-agent-managed/base/elastic-agent-managed-daemonset.yaml

@@ -23,6 +23,10 @@ spec:
         - key: node-role.kubernetes.io/master
           effect: NoSchedule
       serviceAccountName: elastic-agent
+      # The following setting is needed for Universal Profiling to observe all processes on the host
+      # and produce userspace frames.
+      # If you are using the Universal Profiling integration, please uncomment the following line before applying.
+      # hostPID: true
       hostNetwork: true
       # The following setting is needed for Universal Profiling to allow to set procMount to "Unmasked".
       # If you are using the Universal Profiling integration, please uncomment the following line before applying.

deploy/kubernetes/elastic-agent-kustomize/ksm-autosharding/elastic-agent-managed/extra/elastic-agent-managed-statefulset.yaml

@@ -23,6 +23,10 @@ spec:
         - key: node-role.kubernetes.io/master
           effect: NoSchedule
       serviceAccountName: elastic-agent
+      # The following setting is needed for Universal Profiling to observe all processes on the host
+      # and produce userspace frames.
+      # If you are using the Universal Profiling integration, please uncomment the following line before applying.
+      # hostPID: true
       hostNetwork: false
       # The following setting is needed for Universal Profiling to allow to set procMount to "Unmasked".
       # If you are using the Universal Profiling integration, please uncomment the following line before applying.

deploy/kubernetes/elastic-agent-kustomize/ksm-autosharding/elastic-agent-standalone/base/elastic-agent-standalone-daemonset.yaml

@@ -23,6 +23,10 @@ spec:
         - key: node-role.kubernetes.io/master
           effect: NoSchedule
       serviceAccountName: elastic-agent-standalone
+      # The following setting is needed for Universal Profiling to observe all processes on the host
+      # and produce userspace frames.
+      # If you are using the Universal Profiling integration, please uncomment the following line before applying.
+      # hostPID: true
       hostNetwork: true
       # The following setting is needed for Universal Profiling to allow to set procMount to "Unmasked".
       # If you are using the Universal Profiling integration, please uncomment the following line before applying.

deploy/kubernetes/elastic-agent-kustomize/ksm-autosharding/elastic-agent-standalone/extra/elastic-agent-standalone-statefulset.yaml

@@ -23,6 +23,10 @@ spec:
         - key: node-role.kubernetes.io/master
           effect: NoSchedule
       serviceAccountName: elastic-agent-standalone
+      # The following setting is needed for Universal Profiling to observe all processes on the host
+      # and produce userspace frames.
+      # If you are using the Universal Profiling integration, please uncomment the following line before applying.
+      # hostPID: true
       hostNetwork: false
       # The following setting is needed for Universal Profiling to allow to set procMount to "Unmasked".
       # If you are using the Universal Profiling integration, please uncomment the following line before applying.

deploy/kubernetes/elastic-agent-managed-kubernetes.yaml

@@ -23,6 +23,10 @@ spec:
         - key: node-role.kubernetes.io/master
           effect: NoSchedule
       serviceAccountName: elastic-agent
+      # The following setting is needed for Universal Profiling to observe all processes on the host
+      # and produce userspace frames.
+      # If you are using the Universal Profiling integration, please uncomment the following line before applying.
+      # hostPID: true
       hostNetwork: true
       # The following setting is needed for Universal Profiling to allow to set procMount to "Unmasked".
       # If you are using the Universal Profiling integration, please uncomment the following line before applying.

deploy/kubernetes/elastic-agent-managed/elastic-agent-managed-daemonset.yaml

@@ -23,6 +23,10 @@ spec:
         - key: node-role.kubernetes.io/master
           effect: NoSchedule
       serviceAccountName: elastic-agent
+      # The following setting is needed for Universal Profiling to observe all processes on the host
+      # and produce userspace frames.
+      # If you are using the Universal Profiling integration, please uncomment the following line before applying.
+      # hostPID: true
       hostNetwork: true
       # The following setting is needed for Universal Profiling to allow to set procMount to "Unmasked".
       # If you are using the Universal Profiling integration, please uncomment the following line before applying.

deploy/kubernetes/elastic-agent-standalone-kubernetes.yaml

@@ -699,6 +699,10 @@ spec:
         - key: node-role.kubernetes.io/master
           effect: NoSchedule
       serviceAccountName: elastic-agent-standalone
+      # The following setting is needed for Universal Profiling to observe all processes on the host
+      # and produce userspace frames.
+      # If you are using the Universal Profiling integration, please uncomment the following line before applying.
+      # hostPID: true
       hostNetwork: true
       # The following setting is needed for Universal Profiling to allow to set procMount to "Unmasked".
       # If you are using the Universal Profiling integration, please uncomment the following line before applying.