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Kubernetes Collection v4.0.0 - How to Upgrade

Requirements

  • helm3
  • kubectl
  • Set the following environment variables, which our commands will use:
    export NAMESPACE=...
    export HELM_RELEASE_NAME=...

Metrics migration

If you don't have metrics collection enabled, skip straight to the next major section.

Convert Prometheus remote writes to otel metrics filters

When?: If you have custom remote writes defined in kube-prometheus-stack.prometheus.additionalRemoteWrites.

When using Prometheus for metrics collection in v3, we relied on remote writes for filtering forwarded metrics. OTel, which is the default in v4, does not support remote writes, so we've moved this functionality to OTel processors, or ServiceMonitors if it can be done there.

There are several scenarios here, depending on the exact use case:

  1. You're collecting different Kubernetes metrics than what the Chart provides by default. You've modified the existing ServiceMonitor for these metrics, and added a remote write as instructed by the documentation.

    You can safely delete the added remote write definition. No further action is required.

  2. As above, but you're also doing some additional data transformation via relabelling rules in the remote write definition.

    You'll need to either move the relabelling rules into the ServiceMonitor itself, or add an equivalent filter processor rule to OTel.

  3. You're collecting custom application metrics by adding a prometheus.io/scrape annotation. You don't need to filter these metrics.

    No action is needed.

  4. As above, but you also have a remote write definition to filter these metrics.

    You'll need to delete the remote write definition and add an equivalent filter processor rule to OTel.

Upgrade the Kubernetes App

When?: If you use the Sumo Logic Kubernetes App

Recording rule metrics removed in version 4 were used in the Sumo Kubernetes App. A new version of the App must be installed to ensure compatibility with version 4 of Helm Chart. See here for upgrade instructions.

Using the new app with v3

To make the migration simpler, it's possible to configure v3 to be compatible with the new App. This way, you can migrate to the new App before migrating to version 4. The configuration for version 3 is the following:

kube-prometheus-stack:
prometheus:
additionalRemoteWrite:
- url: http://$(METADATA_METRICS_SVC).$(NAMESPACE).svc.cluster.local.:9888/prometheus.metrics.node
remoteTimeout: 5s
writeRelabelConfigs:
- action: keep
regex: node-exporter;(?:node_load1|node_load5|node_load15|node_cpu_seconds_total|node_disk_io_time_weighted_seconds_total|node_disk_io_time_seconds_total|node_vmstat_pgpgin|node_vmstat_pgpgout|node_memory_MemFree_bytes|node_memory_MemAvailable_bytes|node_memory_Cached_bytes|node_memory_Buffers_bytes|node_memory_MemTotal_bytes|node_network_receive_drop_total|node_network_transmit_drop_total|node_network_receive_bytes_total|node_network_transmit_bytes_total|node_filesystem_avail_bytes|node_filesystem_size_bytes)
sourceLabels: [job, __name__]
prometheus-node-exporter:
prometheus:
monitor:
metricRelabelings:
- action: keep
regex: (?:node_load1|node_load5|node_load15|node_cpu_seconds_total|node_disk_io_time_weighted_seconds_total|node_disk_io_time_seconds_total|node_vmstat_pgpgin|node_vmstat_pgpgout|node_memory_MemFree_bytes|node_memory_MemAvailable_bytes|node_memory_Cached_bytes|node_memory_Buffers_bytes|node_memory_MemTotal_bytes|node_network_receive_drop_total|node_network_transmit_drop_total|node_network_receive_bytes_total|node_network_transmit_bytes_total|node_filesystem_avail_bytes|node_filesystem_size_bytes)
sourceLabels: [__name__]

Apply missing Custom Resource Definition for OpenTelemetry Operator

When?? If you already use OpenTelemetry Operator in a version below 0.42.0, apply the following command on your cluster:

kubectl apply -f https://raw.githubusercontent.com/open-telemetry/opentelemetry-helm-charts/opentelemetry-operator-0.44.0/charts/opentelemetry-operator/crds/crd-opentelemetry.io_opampbridges.yaml

How to revert to the v3 defaults

Set the following in your configuration:

sumologic:
metrics:
collector:
otelcol:
enabled: false
remoteWriteProxy:
enabled: true

kube-prometheus-stack:
prometheus:
enabled: true
prometheusOperator:
enabled: true

Remove remaining Fluent Bit and Fluentd configuration

If you've already switched to OTel, skip straight to the next major section.

The following configuration options aren't used anymore, and should be removed from your user-values.yaml:

  • fluent-bit.*
  • sumologic.logs.collector.allowSideBySide
  • sumologic.logs.defaultFluentd.*
  • fluentd.*
  • sumologic.logs.metadata.provider
  • sumologic.metrics.metadata.provider

Configuration Migration

See the v3 migration guide.

In addition, the following changes have been made:

  • otelevents.serviceLabels has been introduced as replacement for fluentd.serviceLabels for events service
  • sumologic.events.sourceName is going to be used instead of fluentd.events.sourceName to build _sourceCategory for events

If you've changed the values of either of these two options, you'll need to adjust your configuration accordingly.

Switch to OTLP sources

note

Both source types will be created by the setup job. The settings discussed here affect which source is actually used.

When?: You use the _sourceName or _source fields in your Sumo queries.

The only solution is to change the queries in question. In general, it's an antipattern to write queries against specific sources, instead of semantic attributes of the data.

How to revert to the v3 defaults

Set the following in your configuration:

sumologic:
logs:
sourceType: http

metrics:
sourceType: http

traces:
sourceType: http

events:
sourceType: http

tracesSampler:
config:
exporters:
otlphttp:
traces_endpoint: ${SUMO_ENDPOINT_DEFAULT_TRACES_SOURCE}/v1/traces

Running the helm upgrade

Once you've taken care of any manual steps necessary for your configuration, run the helm upgrade:

helm upgrade --namespace "${NAMESPACE}" "${HELM_RELEASE_NAME}" sumologic/sumologic --version=4.0.0 -f new-values.yaml

After you're done, please review the full list of changes, as some of them may impact you even if they don't require additional action.

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