Add an Helm chart for Antrea

And use the Helm templates (instead of Kustomize) to generate the
standard Antrea YAML manifests (which are checked-in and uploaded as
release assets).

Standard manifests are generated based on Helm values files located
under build/yamls/chart-values/, using a new script
(./hack/generate-standard-manifests.sh). It is much faster than the old
version.

While I believe that using Helm directly and specifying YAML values
whenever a new manifest needs to be generated would be better, the
./hack/generate-manifest.sh script is kept as-is, but it now uses Helm
instead of Kustomize.

Documentation for the Helm chart is autogenerated using helm-docs. In a
future PR, we will look into the release process for the Helm
chart. After that, Helm charts could be added for Antrea components
(Flow Aggregator, Flow visibility).

For antrea-io#2641

Signed-off-by: Antonin Bas <abas@vmware.com>

.github/workflows/helm_docs.yml

@@ -0,0 +1,31 @@
+name: Helm docs
+on:
+  pull_request:
+    branches:
+    - main
+    - release-*
+    - feature/*
+  push:
+    branches:
+    - main
+    - release-*
+    - feature/*
+
+jobs:
+  check-helm-docs:
+    name: Check whether autogenerated Helm chart documentation is up-to-date
+    runs-on: [ubuntu-latest]
+    steps:
+    - uses: actions/checkout@v3
+    - name: Run helm-docs
+      working-directory: build/charts/
+      run: |
+        make helm-docs
+    - name: Check for changes
+      working-directory: build/charts/
+      run: |
+        DIFF=$(git diff .)
+        if [ -n "$DIFF" ]; then
+          echo "The Helm chart documentation is out-of-date; please run 'make helm-docs' in 'build/charts/' and commit the changes"
+          exit 1
+        fi

Makefile

@@ -346,11 +346,7 @@ build-scale-simulator:
 .PHONY: manifest
 manifest:
 	@echo "===> Generating dev manifest for Antrea <==="
-	$(CURDIR)/hack/generate-manifest.sh --mode dev > build/yamls/antrea.yml
-	$(CURDIR)/hack/generate-manifest.sh --mode dev --ipsec > build/yamls/antrea-ipsec.yml
-	$(CURDIR)/hack/generate-manifest.sh --mode dev --cloud EKS --encap-mode networkPolicyOnly > build/yamls/antrea-eks.yml
-	$(CURDIR)/hack/generate-manifest.sh --mode dev --cloud GKE --encap-mode noEncap > build/yamls/antrea-gke.yml
-	$(CURDIR)/hack/generate-manifest.sh --mode dev --cloud AKS --encap-mode networkPolicyOnly > build/yamls/antrea-aks.yml
+	$(CURDIR)/hack/generate-standard-manifests.sh --mode dev --out build/yamls
 	$(CURDIR)/hack/generate-manifest-octant.sh --mode dev > build/yamls/antrea-octant.yml
 	$(CURDIR)/hack/generate-manifest-windows.sh --mode dev > build/yamls/antrea-windows.yml
 	$(CURDIR)/hack/generate-manifest-flow-aggregator.sh --mode dev > build/yamls/flow-aggregator.yml

build/charts/Makefile

@@ -0,0 +1,6 @@
+USERID  := $(shell id -u)
+GRPID   := $(shell id -g)
+
+.PHONY: helm-docs
+helm-docs:
+	docker run --rm --volume "$(CURDIR):/helm-docs" --user=$(USERID):$(GRPID) jnorwood/helm-docs:v1.7.0

build/charts/antrea/.helmignore

@@ -0,0 +1,23 @@
+# Patterns to ignore when building packages.
+# This supports shell glob matching, relative path matching, and
+# negation (prefixed with !). Only one pattern per line.
+.DS_Store
+# Common VCS dirs
+.git/
+.gitignore
+.bzr/
+.bzrignore
+.hg/
+.hgignore
+.svn/
+# Common backup files
+*.swp
+*.bak
+*.tmp
+*.orig
+*~
+# Various IDEs
+.project
+.idea/
+*.tmproj
+.vscode/

build/charts/antrea/Chart.yaml

@@ -0,0 +1,18 @@
+apiVersion: v2
+name: antrea
+type: application
+displayName: Antrea
+home: https://antrea.io/
+version: 1.17.0-dev
+appVersion: 1.17.0-dev
+kubeVersion: ">= 1.16.0-0"
+icon: https://raw.githubusercontent.com/antrea-io/antrea/main/docs/assets/logo/antrea_logo.svg
+description: Kubernetes networking based on Open vSwitch
+keywords:
+  - Kubernetes
+  - CNCF
+  - Networking
+  - CNI
+  - Security
+sources:
+  - https://github.com/antrea-io/antrea

build/charts/antrea/README.md

@@ -0,0 +1,106 @@
+# antrea
+
+![Version: 1.17.0-dev](https://img.shields.io/badge/Version-1.17.0--dev-informational?style=flat-square) ![Type: application](https://img.shields.io/badge/Type-application-informational?style=flat-square) ![AppVersion: 1.17.0-dev](https://img.shields.io/badge/AppVersion-1.17.0--dev-informational?style=flat-square)
+
+Kubernetes networking based on Open vSwitch
+
+**Homepage:** <https://antrea.io/>
+
+## Source Code
+
+* <https://github.com/antrea-io/antrea>
+
+## Requirements
+
+Kubernetes: `>= 1.16.0-0`
+
+## Values
+
+| Key | Type | Default | Description |
+|-----|------|---------|-------------|
+| agent.affinity | object | `{}` | Affinity for the antrea-agent Pods. |
+| agent.antreaAgent.extraArgs | list | `[]` | Extra command-line arguments for antrea-agent. |
+| agent.antreaAgent.extraEnv | object | `{}` | Extra environment variables to be injected into antrea-agent. |
+| agent.antreaAgent.extraVolumeMounts | list | `[]` | Additional volumeMounts for the antrea-agent container. |
+| agent.antreaAgent.logFileMaxNum | int | `4` | Max number of log files. |
+| agent.antreaAgent.logFileMaxSize | int | `100` | Max size in MBs of any single log file. |
+| agent.antreaAgent.resources | object | `{"requests":{"cpu":"200m"}}` | Resource requests and limits for the antrea-agent container. |
+| agent.antreaIPsec.resources | object | `{"requests":{"cpu":"50m"}}` | Resource requests and limits for the antrea-ipsec container (when IPsec is enabled). |
+| agent.antreaOVS.extraArgs | list | `[]` | Extra command-line arguments for antrea-ovs. |
+| agent.antreaOVS.logFileMaxNum | int | `4` | Max number of log files. |
+| agent.antreaOVS.logFileMaxSize | int | `100` | Max size in MBs of any single log file. |
+| agent.antreaOVS.resources | object | `{"requests":{"cpu":"200m"}}` | Resource requests and limits for the antrea-ovs container. |
+| agent.apiPort | int | `10350` | Port for the antrea-agent APIServer to serve on. |
+| agent.dnsPolicy | string | `"ClusterFirstWithHostNet"` | DNS Policy for the antrea-agent Pods. |
+| agent.enablePrometheusMetrics | bool | `true` | Enable metrics exposure via Prometheus. |
+| agent.extraVolumes | list | `[]` | Additional volumes for antrea-agent Pods. |
+| agent.installCNI.resources | object | `{"requests":{"cpu":"100m"}}` | Resource requests and limits for the install-cni initContainer. |
+| agent.nodeSelector | object | `{"kubernetes.io/os":"linux"}` | Node selector for the antrea-agent Pods. |
+| agent.podAnnotations | object | `{}` | Annotations to be added to antrea-agent Pods. |
+| agent.podLabels | object | `{}` | Labels to be added to antrea-agent Pods. |
+| agent.priorityClassName | string | `"system-node-critical"` | Prority class to use for the antrea-agent Pods. |
+| agent.tolerations | list | `[{"key":"CriticalAddonsOnly","operator":"Exists"},{"effect":"NoSchedule","operator":"Exists"},{"effect":"NoExecute","operator":"Exists"}]` | Tolerations for the antrea-agent Pods. |
+| agent.updateStrategy | object | `{"type":"RollingUpdate"}` | Update strategy for the antrea-agent DaemonSet. |
+| antreaProxy.nodePortAddresses | list | `[]` | String array of values which specifies the host IPv4/IPv6 addresses for NodePort. By default, all host addresses are used. |
+| antreaProxy.proxyAll | bool | `false` | Proxy all Service traffic, for all Service types, regardless of where it comes from. |
+| antreaProxy.proxyLoadBalancerIPs | bool | `true` | When set to false, AntreaProxy no longer load-balances traffic destined to the External IPs of LoadBalancer Services. |
+| antreaProxy.skipServices | list | `[]` |  |
+| cni.hostBinPath | string | `"/opt/cni/bin"` | Installation path of CNI binaries on the host. |
+| cni.plugins | object | `{"bandwidth":true,"portmap":true}` | Chained plugins to use alongside antrea-cni. |
+| cni.skipBinaries | list | `[]` | CNI binaries shipped with Antrea for which installation should be skipped. |
+| controller.affinity | object | `{}` | Affinity for the antrea-controller Pod. |
+| controller.antreaController.extraArgs | list | `[]` | Extra command-line arguments for antrea-controller. |
+| controller.antreaController.extraEnv | object | `{}` | Extra environment variables to be injected into antrea-controller. |
+| controller.antreaController.logFileMaxNum | int | `4` | Max number of log files. |
+| controller.antreaController.logFileMaxSize | int | `100` | Max size in MBs of any single log file. |
+| controller.antreaController.resources | object | `{"requests":{"cpu":"200m"}}` | Resource requests and limits for the antrea-controller container. |
+| controller.apiPort | int | `10349` | Port for the antrea-controller APIServer to serve on. |
+| controller.enablePrometheusMetrics | bool | `true` | Enable metrics exposure via Prometheus. |
+| controller.nodeSelector | object | `{"kubernetes.io/os":"linux"}` | Node selector for the antrea-controller Pod. |
+| controller.podAnnotations | object | `{}` | Annotations to be added to antrea-controller Pod. |
+| controller.podLabels | object | `{}` | Labels to be added to antrea-controller Pod. |
+| controller.priorityClassName | string | `"system-cluster-critical"` | Prority class to use for the antrea-controller Pod. |
+| controller.selfSigned | bool | `true` | Indicates whether to use auto-generated self-signed TLS certificates. If false, a Secret named "antrea-controller-tls" must be provided with the following keys: ca.crt, tls.crt, tls.key. |
+| controller.tolerations | list | `[{"key":"CriticalAddonsOnly","operator":"Exists"},{"effect":"NoSchedule","key":"node-role.kubernetes.io/master"}]` | Tolerations for the antrea-controller Pod. |
+| defaultMTU | int | `0` | Default MTU to use for the host gateway interface and the network interface of each Pod. By default, antrea-agent will discover the MTU of the Node's primary interface and adjust it to accommodate for tunnel encapsulation overhead if applicable. |
+| egress.exceptCIDRs | list | `[]` | CIDR ranges to which outbound Pod traffic will not be SNAT'd by Egresses. |
+| enableBridgingMode | bool | `false` | Enable bridging mode of Pod network on Nodes, in which the Node's transport interface is connected to the OVS bridge. |
+| featureGates | object | `{}` | To explicitly enable or disable a FeatureGate and bypass the Antrea defaults, add an entry to the dictionary with the FeatureGate's name as the key and a boolean as the value. |
+| flowCollector.activeFlowExportTimeout | string | `"5s"` | timeout after which a flow record is sent to the collector for active flows. |
+| flowCollector.collectorAddr | string | `"flow-aggregator.flow-aggregator.svc:4739:tls"` | IPFIX collector address as a string with format <HOST>:[<PORT>][:<PROTO>]. |
+| flowCollector.flowPollInterval | string | `"5s"` | Determines how often the flow exporter polls for new connections. |
+| flowCollector.idleFlowExportTimeout | string | `"15s"` | timeout after which a flow record is sent to the collector for idle flows. |
+| hostGateway | string | `"antrea-gw0"` | Name of the interface antrea-agent will create and use for host <-> Pod communication. |
+| image | object | `{"pullPolicy":"IfNotPresent","repository":"projects.registry.vmware.com/antrea/antrea-ubuntu","tag":"latest"}` | Container image to use for Antrea components. |
+| ipsec.psk | string | `"changeme"` | Preshared Key (PSK) for IKE authentication. It will be stored in a secret and passed to antrea-agent as an environment variable. |
+| kubeAPIServerOverride | string | `""` | Address of Kubernetes apiserver, to override any value provided in kubeconfig or InClusterConfig. |
+| logVerbosity | int | `0` |  |
+| multicastInterfaces | list | `[]` | Names of the interfaces on Nodes that are used to forward multicast traffic. |
+| noSNAT | bool | `false` | Whether or not to SNAT (using the Node IP) the egress traffic from a Pod to the external network. |
+| nodeIPAM.clusterCIDRs | list | `[]` | CIDR ranges to use when allocating Pod IP addresses. |
+| nodeIPAM.enable | bool | `false` | Enable Node IPAM in Antrea |
+| nodeIPAM.nodeCIDRMaskSizeIPv4 | int | `24` | Mask size for IPv4 Node CIDR in IPv4 or dual-stack cluster. |
+| nodeIPAM.nodeCIDRMaskSizeIPv6 | int | `64` | Mask size for IPv6 Node CIDR in IPv6 or dual-stack cluster. |
+| nodeIPAM.serviceCIDR | string | `""` | IPv4 CIDR ranges reserved for Services. |
+| nodeIPAM.serviceCIDRv6 | string | `""` | IPv6 CIDR ranges reserved for Services. |
+| nodePortLocal.enable | bool | `false` | Enable the NodePortLocal feature. |
+| nodePortLocal.portRange | string | `"61000-62000"` | Port range used by NodePortLocal when creating Pod port mappings. |
+| ovs.bridgeName | string | `"br-int"` | Name of the OVS bridge antrea-agent will create and use. |
+| ovs.hwOffload | bool | `false` | Enable hardware offload for the OVS bridge (required additional configuration). |
+| serviceCIDR | string | `""` | IPv4 CIDR range used for Services. Required when AntreaProxy is disabled. |
+| serviceCIDRv6 | string | `""` | IPv6 CIDR range used for Services. Required when AntreaProxy is disabled. |
+| testing.coverage | bool | `false` |  |
+| testing.simulator.enable | bool | `false` |  |
+| tlsCipherSuites | string | `""` | Comma-separated list of cipher suites that will be used by the Antrea APIservers. If empty, the default Go Cipher Suites will be used. See https://golang.org/pkg/crypto/tls/#pkg-constants. |
+| tlsMinVersion | string | `""` | TLS min version from: VersionTLS10, VersionTLS11, VersionTLS12, VersionTLS13. |
+| trafficEncapMode | string | `"encap"` | Determines how traffic is encapsulated. It must be one of "encap", "noEncap", "hybrid", or "networkPolicyOnly". |
+| trafficEncryptionMode | string | `"none"` | Determines how tunnel traffic is encrypted. Currently encryption only works with encap mode.It must be one of "none", "ipsec", "wireGuard". |
+| transportInterface | string | `""` | Name of the interface on Node which is used for tunneling or routing the traffic across Nodes. |
+| transportInterfaceCIDRs | list | `[]` | Network CIDRs of the interface on Node which is used for tunneling or routing the traffic across Nodes. |
+| tunnelType | string | `"geneve"` | Tunnel protocol used for encapsulating traffic across Nodes. It must be one of "geneve", "vxlan", "gre", "stt". |
+| webhooks.labelsMutator.enable | bool | `false` |  |
+| whereabouts.enable | bool | `false` |  |
+| wireGuard.port | int | `51820` | Port for WireGuard to send and receive traffic. |
+
+----------------------------------------------
+Autogenerated from chart metadata using [helm-docs v1.7.0](https://github.com/norwoodj/helm-docs/releases/v1.7.0)