[nr-ebpf-agent] Add option to configure push period. (#1490)

~This PR has a hard dependency on updating the ebpf client version --
need cut a new release for that first.~ Done in #1493
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#### Is this a new chart
No

#### What this PR does / why we need it:
Adds option to configure push period from the ebpf agent. The eBPF agent
applies a request path clustering algorithm to reduce cardinality in
exported HTTP data. The algorithm only looks for similar request paths
within data of the same push period. This change enables customers to
increase the window under consideration for cardinality reduction if
needed.

#### Which issue this PR fixes
*(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)`
format, will close that issue when PR gets merged)*
  - fixes #

#### Special notes for your reviewer:

#### Checklist
[Place an '[x]' (no spaces) in all applicable fields. Please remove
unrelated fields.]
- [x] Chart Version bumped
- [x] Variables are documented in the README.md
- [x] Title of the PR starts with chart name (e.g. `[mychartname]`)

---------

Signed-off-by: Benjamin Kilimnik <bkilimnik@pixielabs.ai>
Co-authored-by: Kartik Pattaswamy <62078498+kpattaswamy@users.noreply.github.com>

charts/nr-ebpf-agent/Chart.yaml

@@ -13,7 +13,7 @@ type: application
 # This is the chart version. This version number should be incremented each time you make changes
 # to the chart and its templates, including the app version.
 # Versions are expected to follow Semantic Versioning (https://semver.org/)
-version: 0.1.6
+version: 0.1.7
 dependencies:
   - name: common-library
     version: 1.1.1

charts/nr-ebpf-agent/README.md

@@ -103,6 +103,7 @@ Options that can be defined globally include `affinity`, `nodeSelector`, `tolera
 | podLabels | object | `{}` | Additional labels for chart pods |
 | protocols | object | `{"amqp":true,"cass":true,"dns":true,"http":true,"kafka":true,"mongodb":true,"mysql":true,"pgsql":true,"redis":true}` | The protocols (and data export scripts) to enable for tracing in the socket_tracer. |
 | proxy | string | `""` | Configures the agent to send all data through the proxy specified via the otel collector. |
+| pushPeriod | string | `"15"` | The periodicity in seconds at which the eBPF client pushes data to the OTel collector for export to NR. The eBPF agent applies a request path clustering algorithm to reduce cardinality in exported HTTP data. The algorithm only looks for similar request paths within data of the same push period.  To increase the window under consideration for cardinality reduction, increase this value. Accepted range: 15-60. |
 | stirlingSources | string | `"socket_tracer,tcp_stats"` | The source connectors (and data export scripts) to enable. Note that socket_tracer tracks http, mysql, redis, mongodb, amqp, cassandra, dns, and postgresql while tcp_stats tracks TCP metrics. |
 | tableStoreDataLimitMB | string | `"250"` | The primary lever to control RAM use of the eBPF agent. Specified in MiB. |
 | tolerations | list | `[]` | Sets all pods' tolerations to node taints. Can be configured also with `global.tolerations` |

charts/nr-ebpf-agent/templates/nr-ebpf-agent-daemonset.yaml

@@ -51,6 +51,8 @@ spec:
         env:
           - name: DEPLOYMENT_NAME
             value: {{ .Values.cluster }}
+          - name: PERIOD
+            value: "{{ .Values.pushPeriod }}"
           - name: HOST_IP
             valueFrom:
               fieldRef:

charts/nr-ebpf-agent/values.yaml

@@ -23,6 +23,11 @@ protocols:
   cass: true
   dns: true
   pgsql: true
+# -- The periodicity in seconds at which the eBPF agent pushes data to the OTel collector for export to NR.
+# The eBPF agent applies a request path clustering algorithm to reduce cardinality in exported HTTP data.
+# The algorithm only looks for similar request paths within data of the same push period.
+# To increase the window under consideration for cardinality reduction, increase this value. Accepted range: 15-60.
+pushPeriod: "15"
 
 # Configuration to apply on the eBPF agent daemonset.
 ebpfAgent: