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Replace glog with zap and refactor controller

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This commit is contained in:
Stefan Prodan
2018-09-26 11:07:33 +03:00
parent 3eef986ce7
commit 0a03c8c04f
11 changed files with 672 additions and 1387 deletions
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Gopkg.lock
Generated
+12 -2
View File
@@ -54,11 +54,12 @@
[[projects]]
branch = "master"
digest = "1:e2b86e41f3d669fc36b50d31d32d22c8ac656c75aa5ea89717ce7177e134ff2a"
digest = "1:e0f096f9332ad5f84341de82db69fd098864b17c668333a1fbbffd1b846dcc2b"
name = "github.com/golang/glog"
packages = ["."]
pruneopts = "NUT"
revision = "23def4e6c14b4da8ac2ed8007337bc5eb5007998"
revision = "2cc4b790554d1a0c48fcc3aeb891e3de70cf8de0"
source = "github.com/istio/glog"
[[projects]]
branch = "master"
@@ -153,6 +154,14 @@
revision = "9f23e2d6bd2a77f959b2bf6acdbefd708a83a4a4"
version = "v0.3.6"
[[projects]]
branch = "master"
digest = "1:e0f096f9332ad5f84341de82db69fd098864b17c668333a1fbbffd1b846dcc2b"
name = "github.com/istio/glog"
packages = ["."]
pruneopts = "NUT"
revision = "2cc4b790554d1a0c48fcc3aeb891e3de70cf8de0"
[[projects]]
digest = "1:0243cffa4a3410f161ee613dfdd903a636d07e838a42d341da95d81f42cd1d41"
name = "github.com/json-iterator/go"
@@ -668,6 +677,7 @@
input-imports = [
"github.com/fatih/color",
"github.com/google/go-cmp/cmp",
"github.com/istio/glog",
"github.com/knative/pkg/apis/istio/v1alpha3",
"github.com/knative/pkg/client/clientset/versioned",
"github.com/knative/pkg/signals",
Gopkg.toml
+4
View File
@@ -49,6 +49,10 @@ required = [
name = "github.com/knative/pkg"
revision = "c15d7c8f2220a7578b33504df6edefa948c845ae"
[[override]]
name = "github.com/golang/glog"
source = "github.com/istio/glog"
[prune]
go-tests = true
unused-packages = true
README.md
+17
View File
@@ -57,6 +57,23 @@ spec:
weight: 0
```
Primary and canary services should expose a port named http:
```yaml
apiVersion: v1
kind: Service
metadata:
name: podinfo-canary
spec:
type: ClusterIP
selector:
app: podinfo-canary
ports:
- name: http
port: 9898
targetPort: 9898
```
Based on the two deployments, services and virtual service, a rollout can be defined using Steerer's custom resource:
```yaml
artifacts/steerer/deployment.yaml
+6 -8
View File
@@ -22,18 +22,16 @@ spec:
serviceAccountName: steerer
containers:
- name: steerer
image: stefanprodan/steerer:0.0.1
image: stefanprodan/steerer
imagePullPolicy: Always
ports:
- name: http
containerPort: 8080
command:
- ./steerer
- -level=info
- -prometheus=http://prometheus.istio-system.svc.cluster.local:9090
- -window=10s
- -logtostderr
- -stderrthreshold=ERROR
- -log-level=info
- -control-loop-interval=10s
- -metrics-server=http://prometheus.istio-system.svc.cluster.local:9090
livenessProbe:
exec:
command:
@@ -42,7 +40,7 @@ spec:
- --tries=1
- --timeout=2
- --spider
- http://localhost:8080/readyz
- http://localhost:8080/healthz
readinessProbe:
exec:
command:
@@ -51,7 +49,7 @@ spec:
- --tries=1
- --timeout=2
- --spider
- http://localhost:8080/readyz
- http://localhost:8080/healthz
resources:
limits:
memory: "512Mi"
cmd/controller/main.go
+13 -12
View File
@@ -5,6 +5,7 @@ import (
"log"
"time"
_ "github.com/istio/glog"
sharedclientset "github.com/knative/pkg/client/clientset/versioned"
"github.com/knative/pkg/signals"
clientset "github.com/stefanprodan/steerer/pkg/client/clientset/versioned"
@@ -21,20 +22,20 @@ import (
)
var (
masterURL string
kubeconfig string
metricServer string
rolloutWindow time.Duration
logLevel string
port string
masterURL string
kubeconfig string
metricsServer string
controlLoopInterval time.Duration
logLevel string
port string
)
func init() {
flag.StringVar(&kubeconfig, "kubeconfig", "", "Path to a kubeconfig. Only required if out-of-cluster.")
flag.StringVar(&masterURL, "master", "", "The address of the Kubernetes API server. Overrides any value in kubeconfig. Only required if out-of-cluster.")
flag.StringVar(&metricServer, "prometheus", "http://prometheus:9090", "Prometheus URL")
flag.DurationVar(&rolloutWindow, "window", 10*time.Second, "wait interval between deployment rollouts")
flag.StringVar(&logLevel, "level", "debug", "Log level can be: debug, info, warning, error.")
flag.StringVar(&metricsServer, "metrics-server", "http://prometheus:9090", "Prometheus URL")
flag.DurationVar(&controlLoopInterval, "control-loop-interval", 10*time.Second, "wait interval between rollouts")
flag.StringVar(&logLevel, "log-level", "debug", "Log level can be: debug, info, warning, error.")
flag.StringVar(&port, "port", "8080", "Port to listen on.")
}
@@ -80,7 +81,7 @@ func main() {
logger.Infow("Starting steerer",
zap.String("version", version.VERSION),
zap.String("revision", version.REVISION),
zap.String("metrics provider", metricServer),
zap.String("metrics provider", metricsServer),
zap.Any("kubernetes version", ver))
// start HTTP server
@@ -91,8 +92,8 @@ func main() {
sharedClient,
rolloutClient,
rolloutInformer,
rolloutWindow,
metricServer,
controlLoopInterval,
metricsServer,
logger,
)
pkg/controller/controller.go
+7 -7
View File
@@ -6,12 +6,12 @@ import (
"time"
"github.com/google/go-cmp/cmp"
sharedclientset "github.com/knative/pkg/client/clientset/versioned"
istioclientset "github.com/knative/pkg/client/clientset/versioned"
rolloutv1 "github.com/stefanprodan/steerer/pkg/apis/rollout/v1beta1"
clientset "github.com/stefanprodan/steerer/pkg/client/clientset/versioned"
rolloutscheme "github.com/stefanprodan/steerer/pkg/client/clientset/versioned/scheme"
rolloutInformers "github.com/stefanprodan/steerer/pkg/client/informers/externalversions/rollout/v1beta1"
listers "github.com/stefanprodan/steerer/pkg/client/listers/rollout/v1beta1"
rolloutinformers "github.com/stefanprodan/steerer/pkg/client/informers/externalversions/rollout/v1beta1"
rolloutlisters "github.com/stefanprodan/steerer/pkg/client/listers/rollout/v1beta1"
"go.uber.org/zap"
corev1 "k8s.io/api/core/v1"
"k8s.io/apimachinery/pkg/api/errors"
@@ -30,9 +30,9 @@ const controllerAgentName = "steerer"
type Controller struct {
kubeClient kubernetes.Interface
istioClient sharedclientset.Interface
istioClient istioclientset.Interface
rolloutClient clientset.Interface
rolloutLister listers.RolloutLister
rolloutLister rolloutlisters.RolloutLister
rolloutSynced cache.InformerSynced
rolloutWindow time.Duration
workqueue workqueue.RateLimitingInterface
@@ -44,9 +44,9 @@ type Controller struct {
func NewController(
kubeClient kubernetes.Interface,
istioClient sharedclientset.Interface,
istioClient istioclientset.Interface,
rolloutClient clientset.Interface,
rolloutInformer rolloutInformers.RolloutInformer,
rolloutInformer rolloutinformers.RolloutInformer,
rolloutWindow time.Duration,
metricServer string,
logger *zap.SugaredLogger,
vendor/github.com/golang/glog/LICENSE
Generated Vendored
+161 -150
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@@ -1,188 +1,199 @@
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Version 2.0, January 2004
http://www.apache.org/licenses/
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Copyright [yyyy] [name of copyright owner]
Copyright 2016 Istio Authors
Licensed under the Apache License, Version 2.0 (the "License");
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vendor/github.com/golang/glog/glog.go
Generated Vendored
+77 -1084
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vendor/github.com/golang/glog/glog_file.go
Generated Vendored
-124
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@@ -1,124 +0,0 @@
// Go support for leveled logs, analogous to https://code.google.com/p/google-glog/
//
// Copyright 2013 Google Inc. All Rights Reserved.
//
// 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.
// File I/O for logs.
package glog
import (
"errors"
"flag"
"fmt"
"os"
"os/user"
"path/filepath"
"strings"
"sync"
"time"
)
// MaxSize is the maximum size of a log file in bytes.
var MaxSize uint64 = 1024 * 1024 * 1800
// logDirs lists the candidate directories for new log files.
var logDirs []string
// If non-empty, overrides the choice of directory in which to write logs.
// See createLogDirs for the full list of possible destinations.
var logDir = flag.String("log_dir", "", "If non-empty, write log files in this directory")
func createLogDirs() {
if *logDir != "" {
logDirs = append(logDirs, *logDir)
}
logDirs = append(logDirs, os.TempDir())
}
var (
pid = os.Getpid()
program = filepath.Base(os.Args[0])
host = "unknownhost"
userName = "unknownuser"
)
func init() {
h, err := os.Hostname()
if err == nil {
host = shortHostname(h)
}
current, err := user.Current()
if err == nil {
userName = current.Username
}
// Sanitize userName since it may contain filepath separators on Windows.
userName = strings.Replace(userName, `\`, "_", -1)
}
// shortHostname returns its argument, truncating at the first period.
// For instance, given "www.google.com" it returns "www".
func shortHostname(hostname string) string {
if i := strings.Index(hostname, "."); i >= 0 {
return hostname[:i]
}
return hostname
}
// logName returns a new log file name containing tag, with start time t, and
// the name for the symlink for tag.
func logName(tag string, t time.Time) (name, link string) {
name = fmt.Sprintf("%s.%s.%s.log.%s.%04d%02d%02d-%02d%02d%02d.%d",
program,
host,
userName,
tag,
t.Year(),
t.Month(),
t.Day(),
t.Hour(),
t.Minute(),
t.Second(),
pid)
return name, program + "." + tag
}
var onceLogDirs sync.Once
// create creates a new log file and returns the file and its filename, which
// contains tag ("INFO", "FATAL", etc.) and t. If the file is created
// successfully, create also attempts to update the symlink for that tag, ignoring
// errors.
func create(tag string, t time.Time) (f *os.File, filename string, err error) {
onceLogDirs.Do(createLogDirs)
if len(logDirs) == 0 {
return nil, "", errors.New("log: no log dirs")
}
name, link := logName(tag, t)
var lastErr error
for _, dir := range logDirs {
fname := filepath.Join(dir, name)
f, err := os.Create(fname)
if err == nil {
symlink := filepath.Join(dir, link)
os.Remove(symlink) // ignore err
os.Symlink(name, symlink) // ignore err
return f, fname, nil
}
lastErr = err
}
return nil, "", fmt.Errorf("log: cannot create log: %v", lastErr)
}
vendor/github.com/istio/glog/LICENSE
Generated Vendored
+202
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Apache License
Version 2.0, January 2004
http://www.apache.org/licenses/
TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
1. Definitions.
"License" shall mean the terms and conditions for use, reproduction,
and distribution as defined by Sections 1 through 9 of this document.
"Licensor" shall mean the copyright owner or entity authorized by
the copyright owner that is granting the License.
"Legal Entity" shall mean the union of the acting entity and all
other entities that control, are controlled by, or are under common
control with that entity. For the purposes of this definition,
"control" means (i) the power, direct or indirect, to cause the
direction or management of such entity, whether by contract or
otherwise, or (ii) ownership of fifty percent (50%) or more of the
outstanding shares, or (iii) beneficial ownership of such entity.
"You" (or "Your") shall mean an individual or Legal Entity
exercising permissions granted by this License.
"Source" form shall mean the preferred form for making modifications,
including but not limited to software source code, documentation
source, and configuration files.
"Object" form shall mean any form resulting from mechanical
transformation or translation of a Source form, including but
not limited to compiled object code, generated documentation,
and conversions to other media types.
"Work" shall mean the work of authorship, whether in Source or
Object form, made available under the License, as indicated by a
copyright notice that is included in or attached to the work
(an example is provided in the Appendix below).
"Derivative Works" shall mean any work, whether in Source or Object
form, that is based on (or derived from) the Work and for which the
editorial revisions, annotations, elaborations, or other modifications
represent, as a whole, an original work of authorship. For the purposes
of this License, Derivative Works shall not include works that remain
separable from, or merely link (or bind by name) to the interfaces of,
the Work and Derivative Works thereof.
"Contribution" shall mean any work of authorship, including
the original version of the Work and any modifications or additions
to that Work or Derivative Works thereof, that is intentionally
submitted to Licensor for inclusion in the Work by the copyright owner
or by an individual or Legal Entity authorized to submit on behalf of
the copyright owner. For the purposes of this definition, "submitted"
means any form of electronic, verbal, or written communication sent
to the Licensor or its representatives, including but not limited to
communication on electronic mailing lists, source code control systems,
and issue tracking systems that are managed by, or on behalf of, the
Licensor for the purpose of discussing and improving the Work, but
excluding communication that is conspicuously marked or otherwise
designated in writing by the copyright owner as "Not a Contribution."
"Contributor" shall mean Licensor and any individual or Legal Entity
on behalf of whom a Contribution has been received by Licensor and
subsequently incorporated within the Work.
2. Grant of Copyright License. Subject to the terms and conditions of
this License, each Contributor hereby grants to You a perpetual,
worldwide, non-exclusive, no-charge, royalty-free, irrevocable
copyright license to reproduce, prepare Derivative Works of,
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Work and such Derivative Works in Source or Object form.
3. Grant of Patent License. Subject to the terms and conditions of
this License, each Contributor hereby grants to You a perpetual,
worldwide, non-exclusive, no-charge, royalty-free, irrevocable
(except as stated in this section) patent license to make, have made,
use, offer to sell, sell, import, and otherwise transfer the Work,
where such license applies only to those patent claims licensable
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Contribution(s) alone or by combination of their Contribution(s)
with the Work to which such Contribution(s) was submitted. If You
institute patent litigation against any entity (including a
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or a Contribution incorporated within the Work constitutes direct
or contributory patent infringement, then any patent licenses
granted to You under this License for that Work shall terminate
as of the date such litigation is filed.
4. Redistribution. You may reproduce and distribute copies of the
Work or Derivative Works thereof in any medium, with or without
modifications, and in Source or Object form, provided that You
meet the following conditions:
(a) You must give any other recipients of the Work or
Derivative Works a copy of this License; and
(b) You must cause any modified files to carry prominent notices
stating that You changed the files; and
(c) You must retain, in the Source form of any Derivative Works
that You distribute, all copyright, patent, trademark, and
attribution notices from the Source form of the Work,
excluding those notices that do not pertain to any part of
the Derivative Works; and
(d) If the Work includes a "NOTICE" text file as part of its
distribution, then any Derivative Works that You distribute must
include a readable copy of the attribution notices contained
within such NOTICE file, excluding those notices that do not
pertain to any part of the Derivative Works, in at least one
of the following places: within a NOTICE text file distributed
as part of the Derivative Works; within the Source form or
documentation, if provided along with the Derivative Works; or,
within a display generated by the Derivative Works, if and
wherever such third-party notices normally appear. The contents
of the NOTICE file are for informational purposes only and
do not modify the License. You may add Your own attribution
notices within Derivative Works that You distribute, alongside
or as an addendum to the NOTICE text from the Work, provided
that such additional attribution notices cannot be construed
as modifying the License.
You may add Your own copyright statement to Your modifications and
may provide additional or different license terms and conditions
for use, reproduction, or distribution of Your modifications, or
for any such Derivative Works as a whole, provided Your use,
reproduction, and distribution of the Work otherwise complies with
the conditions stated in this License.
5. Submission of Contributions. Unless You explicitly state otherwise,
any Contribution intentionally submitted for inclusion in the Work
by You to the Licensor shall be under the terms and conditions of
this License, without any additional terms or conditions.
Notwithstanding the above, nothing herein shall supersede or modify
the terms of any separate license agreement you may have executed
with Licensor regarding such Contributions.
6. Trademarks. This License does not grant permission to use the trade
names, trademarks, service marks, or product names of the Licensor,
except as required for reasonable and customary use in describing the
origin of the Work and reproducing the content of the NOTICE file.
7. Disclaimer of Warranty. Unless required by applicable law or
agreed to in writing, Licensor provides the Work (and each
Contributor provides its Contributions) on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
implied, including, without limitation, any warranties or conditions
of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
PARTICULAR PURPOSE. You are solely responsible for determining the
appropriateness of using or redistributing the Work and assume any
risks associated with Your exercise of permissions under this License.
8. Limitation of Liability. In no event and under no legal theory,
whether in tort (including negligence), contract, or otherwise,
unless required by applicable law (such as deliberate and grossly
negligent acts) or agreed to in writing, shall any Contributor be
liable to You for damages, including any direct, indirect, special,
incidental, or consequential damages of any character arising as a
result of this License or out of the use or inability to use the
Work (including but not limited to damages for loss of goodwill,
work stoppage, computer failure or malfunction, or any and all
other commercial damages or losses), even if such Contributor
has been advised of the possibility of such damages.
9. Accepting Warranty or Additional Liability. While redistributing
the Work or Derivative Works thereof, You may choose to offer,
and charge a fee for, acceptance of support, warranty, indemnity,
or other liability obligations and/or rights consistent with this
License. However, in accepting such obligations, You may act only
on Your own behalf and on Your sole responsibility, not on behalf
of any other Contributor, and only if You agree to indemnify,
defend, and hold each Contributor harmless for any liability
incurred by, or claims asserted against, such Contributor by reason
of your accepting any such warranty or additional liability.
END OF TERMS AND CONDITIONS
APPENDIX: How to apply the Apache License to your work.
To apply the Apache License to your work, attach the following
boilerplate notice, with the fields enclosed by brackets "{}"
replaced with your own identifying information. (Don't include
the brackets!) The text should be enclosed in the appropriate
comment syntax for the file format. We also recommend that a
file or class name and description of purpose be included on the
same "printed page" as the copyright notice for easier
identification within third-party archives.
Copyright 2016 Istio Authors
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.
vendor/github.com/istio/glog/glog.go
Generated Vendored
+173
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@@ -0,0 +1,173 @@
// Copyright 2017 Istio Authors
//
// 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.
// Package glog exposes an API subset of the [glog](https://github.com/golang/glog) package.
// All logging state delivered to this package is shunted to the global [zap logger](https://github.com/uber-go/zap).
//
// Istio is built on top of zap logger. We depend on some downstream components that use glog for logging.
// This package makes it so we can intercept the calls to glog and redirect them to zap and thus produce
// a consistent log for our processes.
package glog
import (
"fmt"
"os"
"go.uber.org/zap"
)
// Level is a shim
type Level int32
// Verbose is a shim
type Verbose bool
// Flush is a shim
func Flush() {
zap.L().Sync()
}
// V is a shim
func V(level Level) Verbose {
return Verbose(zap.L().Core().Enabled(zap.DebugLevel))
}
// Info is a shim
func (v Verbose) Info(args ...interface{}) {
zap.S().Debug(args...)
}
// Infoln is a shim
func (v Verbose) Infoln(args ...interface{}) {
s := fmt.Sprint(args)
zap.S().Debug(s, "\n")
}
// Infof is a shim
func (v Verbose) Infof(format string, args ...interface{}) {
zap.S().Debugf(format, args...)
}
// Info is a shim
func Info(args ...interface{}) {
zap.S().Info(args...)
}
// InfoDepth is a shim
func InfoDepth(depth int, args ...interface{}) {
zap.S().Info(args...)
}
// Infoln is a shim
func Infoln(args ...interface{}) {
s := fmt.Sprint(args)
zap.S().Info(s, "\n")
}
// Infof is a shim
func Infof(format string, args ...interface{}) {
zap.S().Infof(format, args...)
}
// Warning is a shim
func Warning(args ...interface{}) {
zap.S().Warn(args...)
}
// WarningDepth is a shim
func WarningDepth(depth int, args ...interface{}) {
zap.S().Warn(args...)
}
// Warningln is a shim
func Warningln(args ...interface{}) {
s := fmt.Sprint(args)
zap.S().Warn(s, "\n")
}
// Warningf is a shim
func Warningf(format string, args ...interface{}) {
zap.S().Warnf(format, args...)
}
// Error is a shim
func Error(args ...interface{}) {
zap.S().Error(args...)
}
// ErrorDepth is a shim
func ErrorDepth(depth int, args ...interface{}) {
zap.S().Error(args...)
}
// Errorln is a shim
func Errorln(args ...interface{}) {
s := fmt.Sprint(args)
zap.S().Error(s, "\n")
}
// Errorf is a shim
func Errorf(format string, args ...interface{}) {
zap.S().Errorf(format, args...)
}
// Fatal is a shim
func Fatal(args ...interface{}) {
zap.S().Error(args...)
os.Exit(255)
}
// FatalDepth is a shim
func FatalDepth(depth int, args ...interface{}) {
zap.S().Error(args...)
os.Exit(255)
}
// Fatalln is a shim
func Fatalln(args ...interface{}) {
s := fmt.Sprint(args)
zap.S().Error(s, "\n")
os.Exit(255)
}
// Fatalf is a shim
func Fatalf(format string, args ...interface{}) {
zap.S().Errorf(format, args...)
os.Exit(255)
}
// Exit is a shim
func Exit(args ...interface{}) {
zap.S().Error(args...)
os.Exit(1)
}
// ExitDepth is a shim
func ExitDepth(depth int, args ...interface{}) {
zap.S().Error(args...)
os.Exit(1)
}
// Exitln is a shim
func Exitln(args ...interface{}) {
s := fmt.Sprint(args)
zap.S().Error(s, "\n")
os.Exit(1)
}
// Exitf is a shim
func Exitf(format string, args ...interface{}) {
zap.S().Errorf(format, args...)
os.Exit(1)
}