Add Tilt-based local dev workflow.

Signed-off-by: Matt Moyer <moyerm@vmware.com>

.gitignore

@@ -16,3 +16,6 @@
 
 # goland
 .idea
+
+# Intermediate files used by Tilt
+/hack/lib/tilt/build

.pre-commit-config.yaml

@@ -1,4 +1,4 @@
-exclude: '^generated/'
+exclude: '^(generated|hack/lib/tilt/tilt_modules)/'
 repos:
 - repo: git://github.com/pre-commit/pre-commit-hooks
   rev: v3.2.0

CONTRIBUTING.md

@@ -93,12 +93,41 @@ docker build .
 
 ### Running Integration Tests
 
+1. Install dependencies:
+
+   - [`kind`](https://kind.sigs.k8s.io/docs/user/quick-start)
+   - [`tilt`](https://docs.tilt.dev/install.html)
+   - [`ytt`](https://carvel.dev/#getting-started)
+   - [`kubectl`](https://kubernetes.io/docs/tasks/tools/install-kubectl/)
+
+   On macOS, these tools can be installed with [Homebrew](https://brew.sh/):
+
    ```bash
-./hack/prepare-for-integration-tests.sh && source /tmp/integration-test-env && go test -v -count 1 ./test/...
+   brew install kind tilt-dev/tap/tilt k14s/tap/ytt kubectl
    ```
 
-The `./hack/prepare-for-integration-tests.sh` script will create a local
-[`kind`](https://kind.sigs.k8s.io/) cluster on which the integration tests will run.
+1. Create a local Kubernetes cluster using `kind`:
+
+   ```bash
+   kind create cluster --image kindest/node:v1.18.8
+   ```
+
+1. Install Pinniped and supporting dependencies using `tilt`:
+
+   ```bash
+   ./hack/tilt-up.sh
+   ```
+
+   Tilt will continue running and live-updating the Pinniped deployment whenever the code changes.
+
+1. Run the Pinniped integration tests:
+
+   ```bash
+   source ./hack/lib/tilt/integration-test.env && go test -v -count 1 ./test/integration
+   ```
+
+To uninstall the test environment, run `./hack/tilt-down.sh`.
+To destroy the local Kubernetes cluster, run `kind delete cluster`.
 
 ### Observing Tests on the Continuous Integration Environment
 

cmd/pinniped-server/main.go

@@ -5,6 +5,7 @@ package main
 
 import (
 	"os"
+	"time"
 
 	genericapiserver "k8s.io/apiserver/pkg/server"
 	"k8s.io/client-go/pkg/version"
@@ -19,7 +20,12 @@ func main() {
 	logs.InitLogs()
 	defer logs.FlushLogs()
 
-	klog.Infof("Running %s at %#v", rest.DefaultKubernetesUserAgent(), version.Get())
+	// Dump out the time since compile (mostly useful for benchmarking our local development cycle latency).
+	var timeSinceCompile time.Duration
+	if buildDate, err := time.Parse(time.RFC3339, version.Get().BuildDate); err == nil {
+		timeSinceCompile = time.Since(buildDate).Round(time.Second)
+	}
+	klog.Infof("Running %s at %#v (%s since build)", rest.DefaultKubernetesUserAgent(), version.Get(), timeSinceCompile)
 
 	ctx := genericapiserver.SetupSignalContext()
 

hack/lib/tilt/Tiltfile

@@ -0,0 +1,97 @@
+load('ext://restart_process', 'docker_build_with_restart')
+disable_snapshots()
+analytics_settings(False)
+update_settings(max_parallel_updates=8)
+os.putenv('CGO_ENABLED', '0')
+os.putenv('GOOS', 'linux')
+os.putenv('GOARCH', 'amd64')
+os.putenv('CGO_ENABLED', '0')
+os.putenv('KUBE_GIT_VERSION', 'v0.0.0')
+
+# Compile all of our ./cmd/... binaries.
+local_resource(
+  'compile',
+  'cd ../../../ && mkdir -p ./hack/lib/tilt/build && go build -v -ldflags "$(hack/get-ldflags.sh)" -o ./hack/lib/tilt/build ./cmd/...',
+  deps=['../../../cmd', '../../../internal', '../../../pkg', '../../../generated'],
+)
+
+# Build a container image for local-user-authenticator, with live-update enabled.
+docker_build_with_restart('image/local-user-auth', '.',
+    dockerfile='local-user-authenticator.Dockerfile',
+    entrypoint=['/usr/local/bin/local-user-authenticator'],
+    live_update=[sync('./build/local-user-authenticator', '/usr/local/bin/local-user-authenticator')],
+    only=['./build/local-user-authenticator'],
+)
+
+# Render the local-user-authenticator installation manifest using ytt.
+k8s_yaml(local([
+    'ytt',
+    '--file', '../../../deploy-local-user-authenticator',
+    '--data-value', 'image_repo=image/local-user-auth',
+    '--data-value', 'image_tag=tilt-dev',
+]))
+
+# Collect all the deployed local-user-authenticator resources under a "local-user-auth" resource tab.
+k8s_resource(
+    workload='local-user-authenticator',
+    new_name='local-user-auth',
+    objects=[
+        'local-user-authenticator:namespace',
+        'local-user-authenticator:serviceaccount',
+        'local-user-authenticator:role',
+        'local-user-authenticator:rolebinding',
+    ],
+)
+
+# Build a container image for the Pinniped server, with live-update enabled.
+docker_build_with_restart('image/pinniped', '.',
+    dockerfile='pinniped.Dockerfile',
+    entrypoint=['/usr/local/bin/pinniped-server'],
+    live_update=[sync('./build/pinniped-server', '/usr/local/bin/pinniped-server')],
+    only=['./build/pinniped-server'],
+)
+
+# Render the Pinniped server installation manifest using ytt.
+k8s_yaml(local([
+    'sh', '-c',
+    'ytt --file ../../../deploy ' +
+    '--data-value namespace=integration ' +
+    '--data-value image_repo=image/pinniped ' +
+    '--data-value image_tag=tilt-dev ' +
+    '--data-value kube_cert_agent_image=debian:10.5-slim ' +
+    '--data-value discovery_url=$(TERM=dumb kubectl cluster-info | awk \'/Kubernetes master/ {print $NF}\') ' +
+    '--data-value-yaml replicas=1'
+]))
+
+# Collect all the deployed local-user-authenticator resources under a "deploy/pinniped" resource tab.
+k8s_resource(
+    workload='pinniped',
+    objects=[
+        'integration:namespace',
+        'credentialissuerconfigs.config.pinniped.dev:customresourcedefinition',
+        'webhookidentityproviders.idp.pinniped.dev:customresourcedefinition',
+        'pinniped:serviceaccount',
+        'pinniped-aggregated-api-server:role',
+        'pinniped-kube-system-pod-read:role',
+        'pinniped-cluster-info-lister-watcher:role',
+        'pinniped-aggregated-api-server:clusterrole',
+        'pinniped-create-token-credential-requests:clusterrole',
+        'pinniped-aggregated-api-server:rolebinding',
+        'pinniped-kube-system-pod-read:rolebinding',
+        'pinniped-extension-apiserver-authentication-reader:rolebinding',
+        'pinniped-cluster-info-lister-watcher:rolebinding',
+        'pinniped-aggregated-api-server:clusterrolebinding',
+        'pinniped-create-token-credential-requests:clusterrolebinding',
+        'pinniped:clusterrolebinding',
+        'pinniped-config:configmap',
+        'v1alpha1.login.pinniped.dev:apiservice',
+    ],
+)
+
+# Collect environment variables needed to run our integration test suite.
+local_resource(
+  'test-env',
+  'TILT_MODE=yes ../../prepare-for-integration-tests.sh',
+  resource_deps=['local-user-auth', 'pinniped'],
+  deps=['../../prepare-for-integration-tests.sh'],
+)

hack/lib/tilt/local-user-authenticator.Dockerfile

@@ -0,0 +1,14 @@
+# Copyright 2020 VMware, Inc.
+# SPDX-License-Identifier: Apache-2.0
+
+# Use a runtime image based on Debian slim
+FROM debian:10.5-slim
+
+# Copy the binary which was built outside the container.
+COPY build/local-user-authenticator /usr/local/bin/local-user-authenticator
+
+# Document the port
+EXPOSE 443
+
+# Set the entrypoint
+ENTRYPOINT ["/usr/local/bin/local-user-authenticator"]

hack/lib/tilt/pinniped.Dockerfile

@@ -0,0 +1,14 @@
+# Copyright 2020 VMware, Inc.
+# SPDX-License-Identifier: Apache-2.0
+
+# Use a runtime image based on Debian slim
+FROM debian:10.5-slim
+
+# Copy the binary which was built outside the container.
+COPY build/pinniped-server /usr/local/bin/pinniped-server
+
+# Document the port
+EXPOSE 443
+
+# Set the entrypoint
+ENTRYPOINT ["/usr/local/bin/pinniped-server"]

hack/lib/tilt/tilt_modules/docker_build_sub/Tiltfile

@@ -0,0 +1,44 @@
+def docker_build_sub(ref, context, extra_cmds, child_context=None, base_suffix='-tilt_docker_build_sub_base', live_update=[], **kwargs):
+  """
+  Substitutes in a docker image with extra Dockerfile commands.
+
+  This allows you to easily customize your docker build for your dev environment without changing your prod Dockerfile.
+
+  This works by:
+  1. Renaming the original image to, e.g. "myimage-base"
+  2. Creating a new image named, e.g. "myimage" that starts with "FROM myimage-base"
+  3. Adding whatever extra stuff you want
+
+  Examples:
+  ```
+  # load the extension
+  load("ext://docker_build_sub", "docker_build_sub")
+
+  # ensure you have vim installed when running in dev, so you can
+  # shell into the box and look at files
+  docker_build_sub('myimage', '.', extra_cmds=["apt-get install vim"])
+
+  # use live_update to sync files from outside your docker context
+  docker_build_sub('foo', 'foo', child_context='bar',
+    extra_cmds=['ADD . /bar'],
+    live_update=[
+      sync('foo', '/foo'),
+      sync('bar', '/bar'),
+    ]
+  )
+  ```
+
+  This function supports all the normal `docker_build` arguments. See [docker_build API docs](https://docs.tilt.dev/api.html#api.docker_build) for arguments not mentioned here..
+
+  Args:
+    context (str): The directory in which to build the parent (original) image. If child_context is not set, also the directory in which to build the new child image.
+    extra_cmds (List[str]): Any extra Dockerfile commands you want to run when building the image.
+    child_context (str): The directory in which to build the new child image. If unset (None), defaults to the parent image's context.
+    base_suffix (str): The suffix to append to the parent (original) image's name so that the new child image can take the original name. This is mostly ignorable, and just here in case the default generates a conflict for you.
+  """
+  if not child_context:
+    child_context = context
+  base_ref = '%s-base' % ref
+  docker_build(base_ref, context, **kwargs)
+  df = '\n'.join(['FROM %s' % base_ref] + extra_cmds)
+  docker_build(ref, child_context, dockerfile_contents=df, live_update=live_update, **kwargs)

hack/lib/tilt/tilt_modules/extensions.json

@@ -0,0 +1,16 @@
+{
+  "Extensions": [
+    {
+      "Name": "restart_process",
+      "GitCommitHash": "b8df6f5f3368ced855da56e002027a3bd1a61bdf",
+      "ExtensionRegistry": "https://github.com/tilt-dev/tilt-extensions",
+      "TimeFetched": "2020-09-03T23:04:40.167635-05:00"
+    },
+    {
+      "Name": "docker_build_sub",
+      "GitCommitHash": "b8df6f5f3368ced855da56e002027a3bd1a61bdf",
+      "ExtensionRegistry": "https://github.com/tilt-dev/tilt-extensions",
+      "TimeFetched": "2020-09-04T18:01:24.795509-05:00"
+    }
+  ]
+}

hack/lib/tilt/tilt_modules/restart_process/Tiltfile

@@ -0,0 +1,78 @@
+RESTART_FILE = '/.restart-proc'
+TYPE_RESTART_CONTAINER_STEP = 'live_update_restart_container_step'
+
+KWARGS_BLACKLIST = [
+    # since we'll be passing `dockerfile_contents` when building the
+    # child image, remove any kwargs that might conflict
+    'dockerfile', 'dockerfile_contents',
+
+    # 'target' isn't relevant to our child build--if we pass this arg,
+    # Docker will just fail to find the specified stage and error out
+    'target',
+]
+
+def docker_build_with_restart(ref, context, entrypoint, live_update,
+                              base_suffix='-tilt_docker_build_with_restart_base', restart_file=RESTART_FILE, **kwargs):
+    """Wrap a docker_build call and its associated live_update steps so that the last step
+    of any live update is to rerun the given entrypoint.
+
+
+     Args:
+      ref: name for this image (e.g. 'myproj/backend' or 'myregistry/myproj/backend'); as the parameter of the same name in docker_build
+      context: path to use as the Docker build context; as the parameter of the same name in docker_build
+      entrypoint: the command to be (re-)executed when the container starts or when a live_update is run
+      live_update: set of steps for updating a running container; as the parameter of the same name in docker_build
+      base_suffix: suffix for naming the base image, applied as {ref}{base_suffix}
+      restart_file: file that Tilt will update during a live_update to signal the entrypoint to rerun
+      **kwargs: will be passed to the underlying `docker_build` call
+    """
+
+    # first, validate the given live_update steps
+    if len(live_update) == 0:
+        fail("`docker_build_with_restart` requires at least one live_update step")
+    for step in live_update:
+        if type(step) == TYPE_RESTART_CONTAINER_STEP:
+            fail("`docker_build_with_restart` is not compatible with live_update step: "+
+                 "`restart_container()` (this extension is meant to REPLACE restart_container() )")
+
+    # rename the original image to make it a base image and declare a docker_build for it
+    base_ref = '{}{}'.format(ref, base_suffix)
+    docker_build(base_ref, context, **kwargs)
+
+    # declare a new docker build that adds a static binary of tilt-restart-wrapper
+    # (which makes use of `entr` to watch files and restart processes) to the user's image
+    df = '''
+    FROM tiltdev/restart-helper:2020-07-16 as restart-helper
+
+    FROM {}
+    USER root
+    RUN ["touch", "{}"]
+    COPY --from=restart-helper /tilt-restart-wrapper /
+    COPY --from=restart-helper /entr /
+  '''.format(base_ref, restart_file)
+
+    # Clean kwargs for building the child image (which builds on user's specified
+    # image and copies in Tilt's restart wrapper). In practice, this means removing
+    # kwargs that were relevant to building the user's specified image but are NOT
+    # relevant to building the child image / may conflict with args we specifically
+    # pass for the child image.
+    cleaned_kwargs = {k: v for k, v in kwargs.items() if k not in KWARGS_BLACKLIST}
+
+    # Change the entrypoint to use `tilt-restart-wrapper`.
+    # `tilt-restart-wrapper` makes use of `entr` (https://github.com/eradman/entr/) to
+    # re-execute $entrypoint whenever $restart_file changes
+    if type(entrypoint) == type(""):
+        entrypoint_with_entr = ["/tilt-restart-wrapper", "--watch_file={}".format(restart_file), "sh", "-c", entrypoint]
+    elif type(entrypoint) == type([]):
+        entrypoint_with_entr = ["/tilt-restart-wrapper", "--watch_file={}".format(restart_file)] + entrypoint
+    else:
+        fail("`entrypoint` must be a string or list of strings: got {}".format(type(entrypoint)))
+
+    # last live_update step should always be to modify $restart_file, which
+    # triggers the process wrapper to rerun $entrypoint
+    # NB: write `date` instead of just `touch`ing because `entr` doesn't respond
+    # to timestamp changes, only writes (see https://github.com/eradman/entr/issues/32)
+    live_update = live_update + [run('date > {}'.format(restart_file))]
+
+    docker_build(ref, context, entrypoint=entrypoint_with_entr, dockerfile_contents=df,
+                 live_update=live_update, **cleaned_kwargs)

hack/prepare-for-integration-tests.sh

@@ -9,6 +9,14 @@ set -euo pipefail
 #
 # Helper functions
 #
+TILT_MODE=${TILT_MODE:-no}
+function tilt_mode() {
+  if [[ "$TILT_MODE" == "yes" ]]; then
+    return 0
+  fi
+  return 1
+}
+
 function log_note() {
   GREEN='\033[0;32m'
   NC='\033[0m'
@@ -94,6 +102,7 @@ if [ "$(kubectl version --client=true --short | cut -d '.' -f 2)" -lt 18 ]; then
   exit 1
 fi
 
+if ! tilt_mode; then
   #
   # Setup kind and build the app
   #
@@ -156,6 +165,9 @@ kapp deploy --yes --app local-user-authenticator --diff-changes --file "$manifes
 
   popd >/dev/null
 
+fi
+
+
 test_username="test-username"
 test_groups="test-group-0,test-group-1"
 set +o pipefail
@@ -180,6 +192,7 @@ webhook_url="https://local-user-authenticator.local-user-authenticator.svc/authe
 webhook_ca_bundle="$(kubectl get secret local-user-authenticator-tls-serving-certificate --namespace local-user-authenticator -o 'jsonpath={.data.caCertificate}')"
 discovery_url="$(TERM=dumb kubectl cluster-info | awk '/Kubernetes master/ {print $NF}')"
 
+if ! tilt_mode; then
   #
   # Deploy Pinniped
   #
@@ -196,6 +209,7 @@ ytt --file . \
   kapp deploy --yes --app "$app_name" --diff-changes --file "$manifest"
 
   popd >/dev/null
+fi
 
 #
 # Create the environment file
@@ -233,7 +247,10 @@ log_note
 log_note 'Want to run integration tests in GoLand? Copy/paste this "Environment" value for GoLand run configurations:'
 log_note "    ${goland_vars}PINNIPED_CLUSTER_CAPABILITY_FILE=${kind_capabilities_file}"
 log_note
+
+if ! tilt_mode; then
   log_note "You can rerun this script to redeploy local production code changes while you are working."
   log_note
   log_note "To delete the deployments, run 'kapp delete -a local-user-authenticator -y && kapp delete -a pinniped -y'."
   log_note "When you're finished, use 'kind delete cluster' to tear down the cluster."
+fi

hack/tilt-down.sh

@@ -0,0 +1,9 @@
+#!/usr/bin/env bash
+
+# Copyright 2020 the Pinniped contributors. All Rights Reserved.
+# SPDX-License-Identifier: Apache-2.0
+
+set -euo pipefail
+ROOT="$( cd "$( dirname "${BASH_SOURCE[0]}" )/.." && pwd )"
+cd "${ROOT}"
+exec tilt down -f ./hack/lib/tilt/Tiltfile

hack/tilt-up.sh

@@ -0,0 +1,9 @@
+#!/usr/bin/env bash
+
+# Copyright 2020 the Pinniped contributors. All Rights Reserved.
+# SPDX-License-Identifier: Apache-2.0
+
+set -euo pipefail
+ROOT="$( cd "$( dirname "${BASH_SOURCE[0]}" )/.." && pwd )"
+cd "${ROOT}"
+exec tilt up -f ./hack/lib/tilt/Tiltfile --stream