Add KRM function to validate site documents

Proposed KRM function can perform static validation of the site
documents based on Kubeval. It allows to specify additional CRD
locations to be able to validate custom resources. As input,
it uses document bundle created from desired phase's document
entry point or output from render command.

Change-Id: Ib76d88a6e6c7f3b29b29cab0abe038eef380686f
Signed-off-by: Ruslan Aliev <raliev@mirantis.com>
Relates-To: #19
This commit is contained in:
Ruslan Aliev 2021-03-14 22:39:09 -05:00
parent 014e24cd15
commit f7fca469de
9 changed files with 1066 additions and 1 deletions

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@ -170,8 +170,9 @@ ifeq ($(PUBLISH), true)
@docker push $(DOCKER_IMAGE)
endif
# Use specific Dockerfile instead of general one to make image for toolbox
# Use specific Dockerfile instead of general one to make image for kubeval-validator and toolbox
docker-image-toolbox: DOCKER_CMD_FLAGS+=-f krm-functions/toolbox/Dockerfile
docker-image-kubeval-validator: DOCKER_CMD_FLAGS+=-f krm-functions/kubeval-validator/image/Dockerfile
.PHONY: $(PLUGINS_IMAGE_TGT)
$(PLUGINS_IMAGE_TGT):
$(eval plugin_name=$(subst docker-image-,,$@))

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@ -0,0 +1,78 @@
.PHONY: generate license fix vet fmt test build tidy image
SHELL := /bin/bash
GOBIN := $(shell go env GOPATH)/bin
# docker image options
DOCKER_REGISTRY ?= quay.io
DOCKER_IMAGE_NAME ?= kubeval-validator
DOCKER_IMAGE_PREFIX ?= airshipit
DOCKER_IMAGE_TAG ?= v0.1.0
DOCKER_IMAGE ?= $(DOCKER_REGISTRY)/$(DOCKER_IMAGE_PREFIX)/$(DOCKER_IMAGE_NAME):$(DOCKER_IMAGE_TAG)
PUBLISH ?= false
DOCKER_FORCE_CLEAN ?= true
# proxy options
PROXY ?= http://proxy.foo.com:8000
NO_PROXY ?= localhost,127.0.0.1,.svc.cluster.local
USE_PROXY ?= false
.PHONY: build
build:
(cd image && go build -v -o $(GOBIN)/config-function .)
.PHONY: all
all: generate license build fix vet fmt test lint tidy
.PHONY: fix
fix:
(cd image && go fix ./...)
.PHONY: fmt
fmt:
(cd image && go fmt ./...)
.PHONY: generate
generate:
(which $(GOBIN)/mdtogo || go get sigs.k8s.io/kustomize/cmd/mdtogo)
(cd image && GOBIN=$(GOBIN) go generate ./...)
.PHONY: tidy
tidy:
(cd image && go mod tidy)
.PHONY: fix
lint:
(which $(GOBIN)/golangci-lint || go get github.com/golangci/golangci-lint/cmd/golangci-lint@v1.19.1)
(cd image && $(GOBIN)/golangci-lint run ./...)
.PHONY: test
test:
(cd image && go test -cover ./...)
.PHONY: vet
vet:
(cd image && go vet ./...)
.PHONY: image
image:
ifeq ($(USE_PROXY), true)
cd image && \
docker build . --network=host \
--build-arg http_proxy=$(PROXY) \
--build-arg https_proxy=$(PROXY) \
--build-arg HTTP_PROXY=$(PROXY) \
--build-arg HTTPS_PROXY=$(PROXY) \
--build-arg no_proxy=$(NO_PROXY) \
--build-arg NO_PROXY=$(NO_PROXY) \
--tag $(DOCKER_IMAGE) \
--force-rm=$(DOCKER_FORCE_CLEAN)
else
cd image && \
docker build . --network=host \
--tag $(DOCKER_IMAGE) \
--force-rm=$(DOCKER_FORCE_CLEAN)
endif
ifeq ($(PUBLISH), true)
@docker push $(DOCKER_IMAGE)
endif

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@ -0,0 +1,21 @@
# Validation
This is a KRM function which implementing a validation function against
[kubeval](https://github.com/instrumenta/kubeval).
## Function implementation
The function is implemented as an [image](image), and built using `make image`.
### Function configuration
A number of settings can be modified for `kubeval` in the struct `Spec`. See
the `Config` struct definition in [main.go](image/main.go) for documentation.
## Function invocation
The function by running validate command via `airshipctl`:
airshipctl phase validate <phase_name>
This exists non-zero if kubeval detects an invalid Resource.

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@ -0,0 +1,28 @@
ARG GO_IMAGE=gcr.io/gcp-runtimes/go1-builder:1.15
ARG PLUGINS_RELEASE_IMAGE=alpine:3.12.0
FROM ${GO_IMAGE} as function
ENV PATH "/usr/local/go/bin:$PATH"
ENV CGO_ENABLED=0
WORKDIR /go/src/
COPY krm-functions/kubeval-validator/image/go.mod .
COPY krm-functions/kubeval-validator/image/go.sum .
RUN go mod download
COPY krm-functions/kubeval-validator/image/main.go .
RUN go build -v -o /usr/local/bin/config-function ./
FROM ${PLUGINS_RELEASE_IMAGE} as release
ENV PYTHONUNBUFFERED=1
RUN echo "**** install Python ****" && \
apk add --no-cache python3 && \
if [ ! -e /usr/bin/python ]; then ln -sf python3 /usr/bin/python ; fi && \
\
echo "**** install pip ****" && \
python3 -m ensurepip && \
rm -r /usr/lib/python*/ensurepip && \
pip3 install --no-cache --upgrade pip setuptools wheel && \
if [ ! -e /usr/bin/pip ]; then ln -s pip3 /usr/bin/pip ; fi
RUN pip3 install 'ruamel.yaml==0.16.13' 'openapi2jsonschema==0.9.0' openapi-spec-validator
COPY --from=function /usr/local/bin/config-function /usr/local/bin/config-function
COPY krm-functions/kubeval-validator/image/extract-openapi.py /usr/local/bin/
CMD ["config-function"]

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@ -0,0 +1,136 @@
#!/usr/bin/python3
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
from os import getenv
from os.path import basename, isfile, join
from urllib import request
from urllib.parse import urlparse
from openapi2jsonschema import command
from openapi2jsonschema.command import debug, info, error
from openapi_spec_validator import validate_v3_spec
from openapi_spec_validator.exceptions import OpenAPIValidationError
from ruamel.yaml import YAML
openapi_schema_path = "/workdir/schemas-cache/openapischema"
openapi_schema_pattern = """openapi: 3.0.0
info:
title: title
version: 1.0.1
paths: {}
components:
schemas: {}
"""
crd_kind = "CustomResourceDefinition"
crd_list = "/workdir/schemas-cache/crd-list"
phase_rendered = "phase-rendered.yaml"
rewrite_env = "VALIDATOR_REWRITE_SCHEMAS"
yaml = YAML()
def get_gvk(crd):
""" Extracts group, version(s), kind data from CRD """
group = crd["spec"]["group"].split(".")[0]
kind = crd["spec"]["names"]["kind"].lower()
try:
version = crd["spec"]["version"] # v1beta1 CRD
except KeyError:
version = crd["spec"]["versions"] # v1 CRD
return group, version, kind
def process_crd(crd, schemas, schemas_location, rewrite=False):
""" Processes CRD document, extracts GVK and corresponding OpenAPIV3Schema(s) """
g, v, k = get_gvk(crd) # get GVK as tuple
if isinstance(v, str): # process CRD as v1beta1
try:
gvk = g + '.' + v + '.' + k
kgv = k + "-" + g + "-" + v + ".json"
# do not rewrite schemas by default if already exists
if (not isfile(join(schemas_location, kgv)) and gvk not in schemas) or rewrite:
schemas[gvk] = crd["spec"]["validation"]["openAPIV3Schema"]
debug("Extracting OpenAPIV3Schema for {}".format(gvk))
else:
debug("OpenAPIV3Schema for {} was already processed, skipping".format(gvk))
except KeyError:
error("Cannot find OpenAPIV3Schema for {}".format(k))
return
if isinstance(v, list): # process CRD as v1
for version in v:
try:
gvk = g + '.' + version["name"] + '.' + k
kgv = k + "-" + g + "-" + version["name"] + ".json"
# do not rewrite schemas by default if already exists
if (not isfile(join(schemas_location, kgv)) and gvk not in schemas) or rewrite:
schemas[gvk] = version["schema"]["openAPIV3Schema"]
debug("Extracting OpenAPIV3Schema for {}".format(gvk))
else:
debug("OpenAPIV3Schema for {} was already processed, skipping".format(gvk))
except KeyError:
error("Cannot find OpenAPIV3Schema for {}".format(k))
continue
return
def check_yaml_kind(data):
""" Determines whether a YAML document has CRD kind """
return True if data is not None and "kind" in data and data["kind"] == crd_kind else False
def run():
"""
The main function. Reads CRDs from URLs, intelligently extracts OpenAPIV3Schema(s)
from each CRD, appends OpenAPIV3Schema to a designated file and verifies through OpenAPIValidator
"""
openapi_schema = yaml.load(openapi_schema_pattern)
schemas = openapi_schema["components"]["schemas"]
with open(crd_list, 'r') as crd_list_file: # read file with CRD locations
crd_list_data = yaml.load(crd_list_file)
for crd_path in crd_list_data['crdList']:
crd_data = yaml.load_all(request.urlopen(crd_path).read().decode('utf-8')) # read CRD from URL
for crd in crd_data:
try:
if check_yaml_kind(crd):
process_crd(crd, schemas, crd_list_data["schemasLocation"],
basename(urlparse(crd_path).path) == phase_rendered and getenv(rewrite_env) is not None)
except Exception as exc:
error("An error occurred while processing CRD data from {}\n{}".format(crd_path, exc))
# Validate output V3 spec
try:
validate_v3_spec(openapi_schema)
info("Validation of OpenAPIV3Schemas is successful")
except OpenAPIValidationError as exc:
error("An error occurred while validating OpenAPIV3Schema")
raise exc
# Rewrite openAPI schema file
with open(openapi_schema_path, 'w') as openapi_schema_file:
info("Saving OpenAPIV3Schemas")
yaml.dump(openapi_schema, openapi_schema_file)
# run openapi2jsonschema conversion
command.default()
if __name__ == "__main__":
run()

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@ -0,0 +1,8 @@
module opendev.org/airship/airshipctl/functions/validator-kubeval/image
go 1.13
require (
github.com/instrumenta/kubeval v0.0.0-20190918223246-8d013ec9fc56
sigs.k8s.io/kustomize/kyaml v0.7.1
)

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@ -0,0 +1,414 @@
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github.com/vektah/gqlparser v1.1.2/go.mod h1:1ycwN7Ij5njmMkPPAOaRFY4rET2Enx7IkVv3vaXspKw=
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golang.org/x/net v0.0.0-20191004110552-13f9640d40b9 h1:rjwSpXsdiK0dV8/Naq3kAw9ymfAeJIyd0upUIElB+lI=
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golang.org/x/oauth2 v0.0.0-20180821212333-d2e6202438be/go.mod h1:N/0e6XlmueqKjAGxoOufVs8QHGRruUQn6yWY3a++T0U=
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golang.org/x/sys v0.0.0-20180821044426-4ea2f632f6e9/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
golang.org/x/sys v0.0.0-20180830151530-49385e6e1522/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
golang.org/x/sys v0.0.0-20180905080454-ebe1bf3edb33/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
golang.org/x/sys v0.0.0-20180909124046-d0be0721c37e/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
golang.org/x/sys v0.0.0-20181107165924-66b7b1311ac8/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
golang.org/x/sys v0.0.0-20181116152217-5ac8a444bdc5/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
golang.org/x/sys v0.0.0-20190321052220-f7bb7a8bee54/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/sys v0.0.0-20190412213103-97732733099d/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/sys v0.0.0-20190616124812-15dcb6c0061f/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/sys v0.0.0-20191002063906-3421d5a6bb1c h1:Vco5b+cuG5NNfORVxZy6bYZQ7rsigisU1WQFkvQ0L5E=
golang.org/x/sys v0.0.0-20191002063906-3421d5a6bb1c/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/sys v0.0.0-20191005200804-aed5e4c7ecf9/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/sys v0.0.0-20200323222414-85ca7c5b95cd/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/sys v0.0.0-20200930185726-fdedc70b468f/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/sys v0.0.0-20201112073958-5cba982894dd h1:5CtCZbICpIOFdgO940moixOPjc0178IU44m4EjOO5IY=
golang.org/x/sys v0.0.0-20201112073958-5cba982894dd/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/text v0.0.0-20180810153555-6e3c4e7365dd/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
golang.org/x/text v0.3.2 h1:tW2bmiBqwgJj/UpqtC8EpXEZVYOwU0yG4iWbprSVAcs=
golang.org/x/text v0.3.2/go.mod h1:bEr9sfX3Q8Zfm5fL9x+3itogRgK3+ptLWKqgva+5dAk=
golang.org/x/text v0.3.3/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
golang.org/x/text v0.3.4 h1:0YWbFKbhXG/wIiuHDSKpS0Iy7FSA+u45VtBMfQcFTTc=
golang.org/x/text v0.3.4/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
golang.org/x/time v0.0.0-20190308202827-9d24e82272b4/go.mod h1:tRJNPiyCQ0inRvYxbN9jk5I+vvW/OXSQhTDSoE431IQ=
golang.org/x/tools v0.0.0-20180221164845-07fd8470d635/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
golang.org/x/tools v0.0.0-20181030221726-6c7e314b6563/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
golang.org/x/tools v0.0.0-20190114222345-bf090417da8b/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
golang.org/x/tools v0.0.0-20190125232054-d66bd3c5d5a6/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
golang.org/x/tools v0.0.0-20190226205152-f727befe758c/go.mod h1:9Yl7xja0Znq3iFh3HoIrodX9oNMXvdceNzlUR8zjMvY=
golang.org/x/tools v0.0.0-20190311212946-11955173bddd/go.mod h1:LCzVGOaR6xXOjkQ3onu1FJEFr0SW1gC7cKk1uF8kGRs=
golang.org/x/tools v0.0.0-20190524140312-2c0ae7006135/go.mod h1:RgjU9mgBXZiqYHBnxXauZ1Gv1EHHAz9KjViQ78xBX0Q=
golang.org/x/tools v0.0.0-20190614205625-5aca471b1d59/go.mod h1:/rFqwRUd4F7ZHNgwSSTFct+R/Kf4OFW1sUzUTQQTgfc=
golang.org/x/tools v0.0.0-20190617190820-da514acc4774/go.mod h1:/rFqwRUd4F7ZHNgwSSTFct+R/Kf4OFW1sUzUTQQTgfc=
golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1 h1:go1bK/D/BFZV2I8cIQd1NKEZ+0owSTG1fDTci4IqFcE=
golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
google.golang.org/appengine v1.1.0/go.mod h1:EbEs0AVv82hx2wNQdGPgUI5lhzA/G0D9YwlJXL52JkM=
google.golang.org/appengine v1.4.0/go.mod h1:xpcJRLb0r/rnEns0DIKYYv+WjYCduHsrkT7/EB5XEv4=
google.golang.org/genproto v0.0.0-20180817151627-c66870c02cf8/go.mod h1:JiN7NxoALGmiZfu7CAH4rXhgtRTLTxftemlI0sWmxmc=
google.golang.org/genproto v0.0.0-20190819201941-24fa4b261c55/go.mod h1:DMBHOl98Agz4BDEuKkezgsaosCRResVns1a3J2ZsMNc=
google.golang.org/genproto v0.0.0-20200526211855-cb27e3aa2013/go.mod h1:NbSheEEYHJ7i3ixzK3sjbqSGDJWnxyFXZblF3eUsNvo=
google.golang.org/grpc v1.19.0/go.mod h1:mqu4LbDTu4XGKhr4mRzUsmM4RtVoemTSY81AxZiDr8c=
google.golang.org/grpc v1.21.0/go.mod h1:oYelfM1adQP15Ek0mdvEgi9Df8B9CZIaU1084ijfRaM=
google.golang.org/grpc v1.23.0/go.mod h1:Y5yQAOtifL1yxbo5wqy6BxZv8vAUGQwXBOALyacEbxg=
google.golang.org/grpc v1.27.0/go.mod h1:qbnxyOmOxrQa7FizSgH+ReBfzJrCY1pSN7KXBS8abTk=
google.golang.org/protobuf v0.0.0-20200109180630-ec00e32a8dfd/go.mod h1:DFci5gLYBciE7Vtevhsrf46CRTquxDuWsQurQQe4oz8=
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google.golang.org/protobuf v1.23.0/go.mod h1:EGpADcykh3NcUnDUJcl1+ZksZNG86OlYog2l/sGQquU=
google.golang.org/protobuf v1.23.1-0.20200526195155-81db48ad09cc/go.mod h1:EGpADcykh3NcUnDUJcl1+ZksZNG86OlYog2l/sGQquU=
google.golang.org/protobuf v1.25.0/go.mod h1:9JNX74DMeImyA3h4bdi1ymwjUzf21/xIlbajtzgsN7c=
gopkg.in/alecthomas/kingpin.v2 v2.2.6/go.mod h1:FMv+mEhP44yOT+4EoQTLFTRgOQ1FBLkstjWtayDeSgw=
gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15 h1:YR8cESwS4TdDjEe65xsg0ogRM/Nc3DYOhEAlW+xobZo=
gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
gopkg.in/fsnotify.v1 v1.4.7/go.mod h1:Tz8NjZHkW78fSQdbUxIjBTcgA1z1m8ZHf0WmKUhAMys=
gopkg.in/inf.v0 v0.9.1 h1:73M5CoZyi3ZLMOyDlQh031Cx6N9NDJ2Vvfl76EDAgDc=
gopkg.in/inf.v0 v0.9.1/go.mod h1:cWUDdTG/fYaXco+Dcufb5Vnc6Gp2YChqWtbxRZE0mXw=
gopkg.in/resty.v1 v1.12.0/go.mod h1:mDo4pnntr5jdWRML875a/NmxYqAlA73dVijT2AXvQQo=
gopkg.in/tomb.v1 v1.0.0-20141024135613-dd632973f1e7/go.mod h1:dt/ZhP58zS4L8KSrWDmTeBkI65Dw0HsyUHuEVlX15mw=
gopkg.in/yaml.v2 v2.0.0-20170812160011-eb3733d160e7/go.mod h1:JAlM8MvJe8wmxCU4Bli9HhUf9+ttbYbLASfIpnQbh74=
gopkg.in/yaml.v2 v2.2.1/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
gopkg.in/yaml.v2 v2.2.4/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
gopkg.in/yaml.v2 v2.2.8/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
gopkg.in/yaml.v2 v2.3.0 h1:clyUAQHOM3G0M3f5vQj7LuJrETvjVot3Z5el9nffUtU=
gopkg.in/yaml.v2 v2.3.0/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
gopkg.in/yaml.v3 v3.0.0-20200121175148-a6ecf24a6d71 h1:Xe2gvTZUJpsvOWUnvmL/tmhVBZUmHSvLbMjRj6NUUKo=
gopkg.in/yaml.v3 v3.0.0-20200121175148-a6ecf24a6d71/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
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honnef.co/go/tools v0.0.0-20190102054323-c2f93a96b099/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
honnef.co/go/tools v0.0.0-20190523083050-ea95bdfd59fc/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
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k8s.io/gengo v0.0.0-20200413195148-3a45101e95ac/go.mod h1:ezvh/TsK7cY6rbqRK0oQQ8IAqLxYwwyPxAX1Pzy0ii0=
k8s.io/klog/v2 v2.0.0/go.mod h1:PBfzABfn139FHAV07az/IF9Wp1bkk3vpT2XSJ76fSDE=
k8s.io/klog/v2 v2.4.0 h1:7+X0fUguPyrKEC4WjH8iGDg3laWgMo5tMnRTIGTTxGQ=
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View File

@ -0,0 +1,326 @@
/*
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
https://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package main
import (
"bytes"
"errors"
"fmt"
"io"
"io/ioutil"
"net/url"
"os"
"os/exec"
"path/filepath"
"strings"
"github.com/instrumenta/kubeval/kubeval"
"sigs.k8s.io/kustomize/kyaml/kio"
"sigs.k8s.io/kustomize/kyaml/yaml"
)
const (
manifestsMountPoint = "/manifests"
schemaLocationDir = "/workdir/schemas-cache"
fileScheme = "file"
openAPISchemaFile = "openapischema"
crdKind = "CustomResourceDefinition"
kubevalOptsKind = "KubevalOptions"
phaseRenderedFile = "phase-rendered.yaml"
crdListFile = "crd-list"
cleanupEnv = "VALIDATOR_PREVENT_CLEANUP"
planEnv = "VALIDATOR_PLAN_VALIDATION"
defaultKubernetesVersion = "1.16.0"
defaultStrict = true
defaultIgnoreMissingSchemas = false
)
func main() {
rw := &kio.ByteReadWriter{
Reader: os.Stdin,
Writer: os.Stdout,
OmitReaderAnnotations: true,
KeepReaderAnnotations: true,
}
p := kio.Pipeline{
Inputs: []kio.Reader{rw}, // read the inputs into a slice
Filters: []kio.Filter{kubevalFilter{rw: rw}}, // filters input by validation
Outputs: []kio.Writer{rw}, // copy the inputs to the output
}
if err := p.Execute(); err != nil {
printMsg("%v\n", err)
// Clean up working directory
if err = os.RemoveAll(schemaLocationDir); err != nil {}
os.Exit(1)
}
}
// kubevalFilter implements kio.Filter
type kubevalFilter struct {
rw *kio.ByteReadWriter
}
// CRDConfigMap is a map with appropriate validation configs for plans/phases
type CRDConfigMap map[string]*CRDSpec
// Config defines the input config schema as a struct
type Config struct {
Spec *Spec `yaml:"siteConfig"`
PlanName string `yaml:"planName,omitempty"`
PlanConfigs CRDConfigMap `yaml:"planConfigs,omitempty"`
PhaseName string `yaml:"phaseName,omitempty"`
PhaseConfigs CRDConfigMap `yaml:"phaseConfigs,omitempty"`
}
// Spec holds main kubeval parameters
type Spec struct {
// Strict disallows additional properties not in schema if set
Strict bool `yaml:"strict,omitempty"`
// IgnoreMissingSchemas skips validation for resource
// definitions without a schema.
IgnoreMissingSchemas bool `yaml:"ignoreMissingSchemas,omitempty"`
// KubernetesVersion is the version of Kubernetes to validate
// against (default "master").
KubernetesVersion string `yaml:"kubernetesVersion,omitempty"`
}
// CRDSpec holds special options for plan/phase which kinds to skip and which additional CRDs to include
type CRDSpec struct {
// KindsToSkip defines Kinds which will be skipped during validation
KindsToSkip []string `yaml:"kindsToSkip,omitempty"`
// CRDList defines additional CRD locations
CRDList []string `yaml:"crdList,omitempty"`
}
// CrdConfig is a small struct to process CRD list
type CrdConfig struct {
SchemasLocation string `yaml:"schemasLocation"`
CrdList []string `yaml:"crdList"`
}
// Filter checks each resource for validity, otherwise returning an error
func (f kubevalFilter) Filter(in []*yaml.RNode) ([]*yaml.RNode, error) {
cfg, err := f.parseConfig()
if err != nil {
return nil, err
}
kubevalConfig := kubeval.NewDefaultConfig()
kubevalConfig.Strict = cfg.Spec.Strict
kubevalConfig.IgnoreMissingSchemas = cfg.Spec.IgnoreMissingSchemas
kubevalConfig.KubernetesVersion = cfg.Spec.KubernetesVersion
kubevalConfig.AdditionalSchemaLocations = []string{fileScheme + "://" + schemaLocationDir}
kubevalConfig.KindsToSkip = []string{crdKind, kubevalOptsKind}
var crdList []string
if _, plan := os.LookupEnv(planEnv); plan {
// Setup plan specific options
if _, exists := cfg.PlanConfigs[cfg.PlanName]; exists {
kubevalConfig.KindsToSkip = append(kubevalConfig.KindsToSkip, cfg.PlanConfigs[cfg.PlanName].KindsToSkip...)
crdList = cfg.PlanConfigs[cfg.PlanName].CRDList
}
} else {
// Setup phase specific options
if _, exists := cfg.PhaseConfigs[cfg.PhaseName]; exists {
kubevalConfig.KindsToSkip = append(kubevalConfig.KindsToSkip, cfg.PhaseConfigs[cfg.PhaseName].KindsToSkip...)
crdList = cfg.PhaseConfigs[cfg.PhaseName].CRDList
}
}
// Calculate schema location directory for kubeval and openapi2jsonschema based on options
schemasLocation := filepath.Join(schemaLocationDir,
fmt.Sprintf("v%s-%s", kubevalConfig.KubernetesVersion, "standalone"))
if kubevalConfig.Strict {
schemasLocation += "-strict"
}
// Create it if doesn't exist
if _, err := os.Stat(schemasLocation); os.IsNotExist(err) {
if err = os.MkdirAll(schemasLocation, 0755); err != nil {
return nil, err
}
}
// Filter CRDs from input
crdRNodes, err := filterCRD(in)
if err != nil {
return nil, err
}
if len(crdRNodes) > 0 {
// Save filtered CRDs in file to future processing
renderedCRDFile := filepath.Join(schemaLocationDir, phaseRenderedFile)
buf := bytes.Buffer{}
for _, rNode := range crdRNodes {
buf.Write([]byte("---\n" + rNode.MustString()))
}
if err = ioutil.WriteFile(renderedCRDFile, buf.Bytes(), 0600); err != nil {
return nil, err
}
// Prepend rendered CRD to give them priority for processing
crdList = append([]string{renderedCRDFile}, crdList...)
}
if len(crdList) > 0 {
// Process each additional CRD in the list (CRD -> OpenAPIV3 Schema -> Json Schema)
if err := processCRDList(crdList, schemasLocation); err != nil {
return nil, err
}
}
// Validate each Resource
for _, r := range in {
meta, err := r.GetMeta()
if err != nil {
return nil, err
}
if err := validate(r.MustString(), kubevalConfig); err != nil {
// if there's an issue found with document - it will be printed as well
printMsg("Resource invalid: (Kind: %s, Name: %s)\n---\n%s---\n", meta.Kind, meta.Name, r.MustString())
return nil, err
}
// inform document is ok
printMsg("Resource valid: (Kind: %s, Name: %s)\n", meta.Kind, meta.Name)
}
// if prevent cleanup variable is not set then cleanup working directory
if _, cleanup := os.LookupEnv(cleanupEnv); !cleanup {
if err := os.RemoveAll(schemaLocationDir); err != nil {
return nil, err
}
}
// Don't return output list, we satisfied with exit code and stdout/stderr
return nil, nil
}
// filterCRD filters CRD documents from input slice of *yaml.RNodes
func filterCRD(in []*yaml.RNode) ([]*yaml.RNode, error) {
var out []*yaml.RNode
for _, r := range in {
meta, err := r.GetMeta()
if err != nil {
return nil, err
}
if meta.Kind == crdKind {
out = append(out, r)
}
}
return out, nil
}
// validate runs kubeval.Validate and analyzes results
func validate(r string, config *kubeval.Config) error {
results, err := kubeval.Validate([]byte(r), config)
if err != nil {
return err
}
return checkResults(results)
}
// checkResults processes results of validation, so we can filter some of the errors ourselves
func checkResults(results []kubeval.ValidationResult) error {
if len(results) == 0 {
return nil
}
var errs []string
for _, r := range results {
for _, e := range r.Errors {
errs = append(errs, e.String())
}
}
if len(errs) > 0 {
return errors.New(strings.Join(errs, "\n"))
}
return nil
}
// parseConfig parses the functionConfig into an Config struct.
func (f *kubevalFilter) parseConfig() (*Config, error) {
// Initialize default values
cfg := &Config{
Spec: &Spec{
Strict: defaultStrict,
IgnoreMissingSchemas: defaultIgnoreMissingSchemas,
KubernetesVersion: defaultKubernetesVersion,
},
}
if err := yaml.Unmarshal([]byte(f.rw.FunctionConfig.MustString()), &cfg); err != nil {
return nil, err
}
return cfg, nil
}
// processCRDList takes each CRD from crdList, converts paths to URLs,
// saves it to file and calls conversion script
func processCRDList(crdList []string, schemasLocation string) error {
configMap := CrdConfig{
SchemasLocation: schemasLocation,
CrdList: []string{},
}
// Walk through all additional CRD
for _, crdPath := range crdList {
// Parse provided CRD path as URL
crdURL, err := url.Parse(crdPath)
if err != nil {
return err
}
// Add 'file' scheme if not specified and convert relative path to absolute
if crdURL.Scheme == "" {
crdURL.Scheme = fileScheme
if filepath.Base(crdPath) != phaseRenderedFile {
crdURL.Path = filepath.Join(manifestsMountPoint, crdPath)
}
}
configMap.CrdList = append(configMap.CrdList, crdURL.String())
}
crdData, err := yaml.Marshal(configMap)
if err != nil {
return err
}
crdListFile := filepath.Join(schemaLocationDir, crdListFile)
if err := ioutil.WriteFile(crdListFile, crdData, 0600); err != nil {
return err
}
return openAPI2Json(schemasLocation)
}
// Convert OpenAPI schemas to JSON
func openAPI2Json(schemasLocation string) error {
printMsg("Converting OpenAPI schemas to JSON\n")
openAPISchemaPath := filepath.Join(schemaLocationDir, openAPISchemaFile)
openAPI2JsonCmd := exec.Command("extract-openapi.py", "--strict", "--expanded", "--stand-alone",
"--kubernetes", "-o", schemasLocation, openAPISchemaPath)
// allows to observe realtime output from script
w := io.Writer(os.Stderr)
openAPI2JsonCmd.Stdout = w
openAPI2JsonCmd.Stderr = w
return openAPI2JsonCmd.Run()
}
// printMsg is a convenient function to print output to stderr
func printMsg(format string, a ...interface{}) {
if _, err := fmt.Fprintf(os.Stderr, format, a...); err != nil {}
}

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@ -0,0 +1,53 @@
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
# This kind is used as 'config' field in GenericContainer executor
apiVersion: airshipit.org/v1alpha1
kind: KubevalOptions
metadata:
name: kubeval-options
labels:
airshipit.org/deploy-k8s: "false" # won't be deployed to k8s
# Main config for site
siteConfig:
# Disallow additional properties not in schema - default "true"
strict: true
# Version of Kubernetes to validate against - default "1.16.0"
kubernetesVersion: "1.16.0"
# Skip validation for resource definitions without a schema - default "false"
ignoreMissingSchemas: false
# Current plan to validate; validator searches for the appropriate planConfig in planConfigs map
# Uses only in case of plan validation; planName sets up automatically by templater using appropriate env variable
planName: AIRSHIPCTL_CURRENT_PLAN
# planConfigs is a map with validation configs for specified plans; has the following structure:
# <plan_name1>:
# kindsToSkip: [] (optional)
# crdList: [] (optional)
planConfigs:
phasePlan:
kindsToSkip: # list of kinds to skip from validation
- KindToSkip
crdList: # list of URLs to additional CRDs; could be a file located in manifests/ or an external URL
- url/to/crd.yaml
# Current phase to validate; validator searches for the appropriate phaseConfig in phaseConfigs map
# Uses only in case of plan validation; phaseName sets up automatically by templater using appropriate env variable
phaseName: AIRSHIPCTL_CURRENT_PHASE
# phaseConfigs is a map with validation configs for specified phases; has the following structure:
# <phase_name1>:
# kindsToSkip: [] (optional)
# crdList: [] (optional)
phaseConfigs:
initinfra-ephemeral:
kindsToSkip: # list of kinds to skip from validation
- KindToSkip
crdList: # list of URLs to additional CRDs; could be a file located in manifests/ or an external URL
- url/to/crd.yaml