Templatize version updates

.github/workflows/check-versioned-files.yml

@@ -0,0 +1,16 @@
+name: Test Versioned Files
+on: pull_request
+jobs:
+  regenerate-docs:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Regenerate versioned files
+        run: |
+          make generate-versioned-files
+          if ! git diff --exit-code; then
+            echo "Newly generated versioned files differ from those checked in. Make sure to only update the templates manually and run 'make generate-versioned-files'!" >&2
+            exit 1
+          fi

Makefile

@@ -50,16 +50,17 @@
 ##
 ## Targets for generating assets:
 ##
-##   generate             Generate everything.
-##   generate-crds        Generate Grafana Agent Operator CRDs ands its documentation.
-##   generate-drone       Generate the Drone YAML from Jsonnet.
-##   generate-helm-docs   Generate Helm chart documentation.
-##   generate-helm-tests  Generate Helm chart tests.
-##   generate-manifests   Generate production/kubernetes YAML manifests.
-##   generate-dashboards  Generate dashboards in example/docker-compose after
-##                        changing Jsonnet.
-##   generate-protos      Generate protobuf files.
-##   generate-ui          Generate the UI assets.
+##   generate                 Generate everything.
+##   generate-crds            Generate Grafana Agent Operator CRDs ands its documentation.
+##   generate-drone           Generate the Drone YAML from Jsonnet.
+##   generate-helm-docs       Generate Helm chart documentation.
+##   generate-helm-tests      Generate Helm chart tests.
+##   generate-manifests       Generate production/kubernetes YAML manifests.
+##   generate-dashboards      Generate dashboards in example/docker-compose after
+##                            changing Jsonnet.
+##   generate-protos          Generate protobuf files.
+##   generate-ui              Generate the UI assets.
+##   generate-versioned-files Generate versioned files.
 ##
 ## Other targets:
 ##
@@ -280,8 +281,8 @@ smoke-image:
 # Targets for generating assets
 #
 
-.PHONY: generate generate-crds generate-drone generate-helm-docs generate-helm-tests generate-manifests generate-dashboards generate-protos generate-ui
-generate: generate-crds generate-drone generate-helm-docs generate-helm-tests generate-manifests generate-dashboards generate-protos generate-ui
+.PHONY: generate generate-crds generate-drone generate-helm-docs generate-helm-tests generate-manifests generate-dashboards generate-protos generate-ui generate-versioned-files
+generate: generate-crds generate-drone generate-helm-docs generate-helm-tests generate-manifests generate-dashboards generate-protos generate-ui generate-versioned-files
 
 generate-crds:
 ifeq ($(USE_CONTAINER),1)
@@ -337,6 +338,13 @@ else
 	cd ./web/ui && yarn --network-timeout=1200000 && yarn run build
 endif
 
+generate-versioned-files:
+ifeq ($(USE_CONTAINER),1)
+	$(RERUN_IN_CONTAINER)
+else
+	sh ./tools/gen-versioned-files/gen-versioned-files.sh
+endif
+
 #
 # Other targets
 #

docs/developer/release/3-update-version-in-code.md

@@ -24,6 +24,14 @@ The project must be updated to reference the upcoming release tag whenever a new
 
     3. Update appropriate places in the codebase that have the previous version with the new version determined above.
 
+        First update `tools/gen-versioned-files/agent-version.txt` with the new `VERSION` and run:
+
+        ```
+        make generate-versioned-files
+        ```
+
+        Next, commit the changes (including those to `tools/gen-versioned-files/agent-version.txt`, as a workflow will use this version to ensure that the templates and generated files are in sync).
+
         * Do **not** update the `operations/helm` directory. It is updated independently from Agent releases.
 
 3. Create a PR to merge to main (must be merged before continuing).

docs/sources/_index.md

@@ -7,6 +7,8 @@ canonical: https://grafana.com/docs/agent/latest/
 title: Grafana Agent
 description: Grafana Agent is a flexible, performant, vendor-neutral, telemetry collector
 weight: 350
+cascade:
+  AGENT_RELEASE: v0.37.1
 ---
 
 # Grafana Agent

docs/sources/_index.md.t

@@ -0,0 +1,120 @@
+---
+aliases:
+- /docs/grafana-cloud/agent/
+- /docs/grafana-cloud/monitor-infrastructure/agent/
+- /docs/grafana-cloud/monitor-infrastructure/integrations/agent/
+canonical: https://grafana.com/docs/agent/latest/
+title: Grafana Agent
+description: Grafana Agent is a flexible, performant, vendor-neutral, telemetry collector
+weight: 350
+cascade:
+  AGENT_RELEASE: $AGENT_VERSION
+---
+
+# Grafana Agent
+
+Grafana Agent is a vendor-neutral, batteries-included telemetry collector with
+configuration inspired by [Terraform][]. It is designed to be flexible,
+performant, and compatible with multiple ecosystems such as Prometheus and
+OpenTelemetry.
+
+Grafana Agent is based around **components**. Components are wired together to
+form programmable observability **pipelines** for telemetry collection,
+processing, and delivery.
+
+{{% admonition type="note" %}}
+This page focuses mainly on [Flow mode][], the Terraform-inspired variant of Grafana Agent.
+
+For information on other variants of Grafana Agent, refer to [Introduction to Grafana Agent]({{< relref "./about.md" >}}).
+{{% /admonition %}}
+
+Grafana Agent can collect, transform, and send data to:
+
+* The [Prometheus][] ecosystem
+* The [OpenTelemetry][] ecosystem
+* The Grafana open source ecosystem ([Loki][], [Grafana][], [Tempo][], [Mimir][], [Pyroscope][])
+
+[Terraform]: https://terraform.io
+[Prometheus]: https://prometheus.io
+[OpenTelemetry]: https://opentelemetry.io
+[Loki]: https://github.com/grafana/loki
+[Grafana]: https://github.com/grafana/grafana
+[Tempo]: https://github.com/grafana/tempo
+[Mimir]: https://github.com/grafana/mimir
+[Pyroscope]: https://github.com/grafana/pyroscope
+
+## Why use Grafana Agent?
+
+* **Vendor-neutral**: Fully compatible with the Prometheus, OpenTelemetry, and
+  Grafana open source ecosystems.
+* **Every signal**: Collect telemetry data for metrics, logs, traces, and
+  continuous profiles.
+* **Scalable**: Deploy on any number of machines to collect millions of active
+  series and terabytes of logs.
+* **Battle-tested**: Grafana Agent extends the existing battle-tested code from
+  the Prometheus and OpenTelemetry Collector projects.
+* **Powerful**: Write programmable pipelines with ease, and debug them using a
+  [built-in UI][UI].
+* **Batteries included**: Integrate with systems like MySQL, Kubernetes, and
+  Apache to get telemetry that's immediately useful.
+
+## Getting started
+
+* Choose a [variant][variants] of Grafana Agent to run.
+* Refer to the documentation for the variant to use:
+  * [Static mode][]
+  * [Static mode Kubernetes operator][]
+  * [Flow mode][]
+
+## Supported platforms
+
+* Linux
+
+  * Minimum version: kernel 2.6.32 or later
+  * Architectures: AMD64, ARM64
+
+* Windows
+
+  * Minimum version: Windows Server 2012 or later, or Windows 10 or later.
+  * Architectures: AMD64
+
+* macOS
+
+  * Minimum version: macOS 10.13 or later
+  * Architectures: AMD64 (Intel), ARM64 (Apple Silicon)
+
+* FreeBSD
+
+  * Minimum version: FreeBSD 10 or later
+  * Architectures: AMD64
+
+## Release cadence
+
+A new minor release is planned every six weeks for the entire Grafana Agent
+project, including Static mode, the Static mode Kubernetes operator, and Flow
+mode.
+
+The release cadence is best-effort: releases may be moved forwards or backwards
+if needed. The planned release dates for future minor releases do not change if
+one minor release is moved.
+
+Patch and security releases may be created at any time.
+
+[Milestones]: https://github.com/grafana/agent/milestones
+
+{{% docs/reference %}}
+[variants]: "/docs/agent/ -> /docs/agent/<AGENT VERSION>/about"
+[variants]: "/docs/grafana-cloud/ -> /docs/grafana-cloud/monitor-infrastructure/agent/about"
+
+[Static mode]: "/docs/agent/ -> /docs/agent/<AGENT VERSION>/static"
+[Static mode]: "/docs/grafana-cloud/ -> /docs/grafana-cloud/monitor-infrastructure/agent/static"
+
+[Static mode Kubernetes operator]: "/docs/agent/ -> /docs/agent/<AGENT VERSION>/operator"
+[Static mode Kubernetes operator]: "/docs/grafana-cloud/ -> /docs/grafana-cloud/monitor-infrastructure/agent/operator"
+
+[Flow mode]: "/docs/agent/ -> /docs/agent/<AGENT VERSION>/flow"
+[Flow mode]: "/docs/grafana-cloud/ -> /docs/agent/<AGENT VERSION>/flow"
+
+[UI]: "/docs/agent/ -> /docs/agent/<AGENT VERSION>/flow/monitoring/debugging.md#grafana-agent-flow-ui"
+[UI]: "/docs/grafana-cloud/ -> /docs/agent/<AGENT VERSION>/flow/monitoring/debugging.md#grafana-agent-flow-ui"
+{{% /docs/reference %}}

docs/sources/operator/deploy-agent-operator-resources.md

@@ -62,7 +62,7 @@ To deploy the `GrafanaAgent` resource:
       labels:
         app: grafana-agent
     spec:
-      image: grafana/agent:v0.37.1
+      image: grafana/agent:{{< param "AGENT_RELEASE" >}}
       integrations:
         selector:
           matchLabels:

docs/sources/operator/getting-started.md

@@ -79,7 +79,7 @@ To install Agent Operator:
           serviceAccountName: grafana-agent-operator
           containers:
           - name: operator
-            image: grafana/agent-operator:v0.37.1
+            image: grafana/agent-operator:{{< param "AGENT_RELEASE" >}}
             args:
             - --kubelet-service=default/kubelet
     ---

docs/sources/static/configuration/integrations/node-exporter-config.md

@@ -30,7 +30,7 @@ docker run \
   -v "/proc:/host/proc:ro,rslave" \
   -v /tmp/agent:/etc/agent \
   -v /path/to/config.yaml:/etc/agent-config/agent.yaml \
-  grafana/agent:v0.37.1 \
+  grafana/agent:{{< param "AGENT_RELEASE" >}} \
   --config.file=/etc/agent-config/agent.yaml
 ```
 
@@ -70,7 +70,7 @@ metadata:
   name: agent
 spec:
   containers:
-  - image: grafana/agent:v0.37.0
+  - image: {{< param "AGENT_RELEASE" >}}
     name: agent
     args:
     - --config.file=/etc/agent-config/agent.yaml

docs/sources/static/configuration/integrations/process-exporter-config.md

@@ -22,7 +22,7 @@ docker run \
   -v "/proc:/proc:ro" \
   -v /tmp/agent:/etc/agent \
   -v /path/to/config.yaml:/etc/agent-config/agent.yaml \
-  grafana/agent:v0.37.1 \
+  grafana/agent:{{< param "AGENT_RELEASE" >}} \
   --config.file=/etc/agent-config/agent.yaml
 ```
 
@@ -39,7 +39,7 @@ metadata:
   name: agent
 spec:
   containers:
-  - image: grafana/agent:v0.37.1
+  - image: grafana/agent:{{< param "AGENT_RELEASE" >}}
     name: agent
     args:
     - --config.file=/etc/agent-config/agent.yaml

docs/sources/static/set-up/install/install-agent-docker.md

@@ -34,7 +34,7 @@ To run a Grafana Agent Docker container on Linux, run the following command in a
 docker run \
   -v WAL_DATA_DIRECTORY:/etc/agent/data \
   -v CONFIG_FILE_PATH:/etc/agent/agent.yaml \
-  grafana/agent:v0.37.1
+  grafana/agent:{{< param "AGENT_RELEASE" >}}
 ```
 
 Replace `CONFIG_FILE_PATH` with the configuration file path on your Linux host system.
@@ -51,7 +51,7 @@ To run a Grafana Agent Docker container on Windows, run the following command in
 docker run ^
   -v WAL_DATA_DIRECTORY:C:\etc\grafana-agent\data ^
   -v CONFIG_FILE_PATH:C:\etc\grafana-agent ^
-  grafana/agent:v0.37.1-windows
+  grafana/agent:{{< param "AGENT_RELEASE" >}}-windows
 ```
 
 Replace the following:

pkg/operator/defaults.go.t

@@ -0,0 +1,15 @@
+package operator
+
+// Supported versions of the Grafana Agent.
+var (
+	DefaultAgentVersion   = "$AGENT_VERSION"
+	DefaultAgentBaseImage = "grafana/agent"
+	DefaultAgentImage     = DefaultAgentBaseImage + ":" + DefaultAgentVersion
+)
+
+// Defaults for Prometheus Config Reloader.
+var (
+	DefaultConfigReloaderVersion   = "v0.67.1"
+	DefaultConfigReloaderBaseImage = "quay.io/prometheus-operator/prometheus-config-reloader"
+	DefaultConfigReloaderImage     = DefaultConfigReloaderBaseImage + ":" + DefaultConfigReloaderVersion
+)

tools/gen-versioned-files/agent-version.txt

@@ -0,0 +1 @@
+v0.37.1

tools/gen-versioned-files/gen-versioned-files.sh

@@ -0,0 +1,20 @@
+#!/bin/sh
+AGENT_VERSION=$(cat ./tools/gen-versioned-files/agent-version.txt | tr -d '\n')
+
+if [ -z "$AGENT_VERSION" ]; then
+    echo "AGENT_VERSION can't be found. Are you running this from the repo root?"
+    exit 1
+fi
+
+versionMatcher='^v[0-9]+\.[0-9]+\.[0-9]+(-rc[0-9]+)?$'
+
+if ! echo "$AGENT_VERSION" | grep -Eq "$versionMatcher"; then
+    echo "AGENT_VERSION env var is not in the correct format. It should be in the format of vX.Y.Z or vX.Y.Z-rcN"
+    exit 1
+fi
+
+templates=$(find . -type f -name "*.t" -not -path "./.git/*")
+for template in $templates; do
+    echo "Generating ${template%.t}"
+    sed -e "s/\$AGENT_VERSION/$AGENT_VERSION/g" < "$template" > "${template%.t}"
+done