We wrote some Go code to talk to our Kubernetes cluster and fetch the IP of a Service exposed. We do it like so:
(import "gopkg.in/kubernetes/kubernetes.v1/pkg/client/restclient")
(import kubectl "gopkg.in/kubernetes/kubernetes.v1/pkg/client/unversioned")
svc, err := c.Services(k8sNS).Get(svcName)
if err != nil {
panic(l.Errorf("Could not retrieve svc details. %s", err.Error()))
}
svcIP := svc.Status.LoadBalancer.Ingress[0].IP
go get works fine, and our script executes when we do go run ... and everybody is happy. Now, as of yesterday (from the time this question is posted) on the same script - go get fails. The error is like so:
[09.07.2016 10:56 AM]$ go get
package k8s.io/kubernetes/pkg/apis/authentication.k8s.io/install: cannot find package "k8s.io/kubernetes/pkg/apis/authentication.k8s.io/install" in any of:
/usr/local/go/src/k8s.io/kubernetes/pkg/apis/authentication.k8s.io/install (from $GOROOT)
/home/ckotha/godir/src/k8s.io/kubernetes/pkg/apis/authentication.k8s.io/install (from $GOPATH)
We have not specifically used authentication package in our code. Are we importing kubernetes libraries correctly? is there another way to do this ?
ls on $GOPATH/k8s.io/kubernetes/pkg/apis/ and found this:
:~/godir/src/k8s.io/kubernetes/pkg/apis
[09.07.2016 10:53 AM]$ ls
abac apps authentication authorization autoscaling batch certificates componentconfig extensions imagepolicy OWNERS policy rbac storage
It looks like a package you imported has changed.
You can update existing repositories:
go get -u
The -u flag instructs get to use the network to update the named
packages and their dependencies. By default, get uses the network to
check out missing packages but does not use it to look for updates to
existing packages.
You do use gopkg.io to pin the version to v1, but I think you want to be more specific, eg, v1.3.6 (EDIT: this won't work because gopkg.in doesn't permit package selectors more specific than the major version.).
Alternatively, a good way to ensure code stays the same is to compile your binary and execute that, instead of using go run.
Related
I am a newbie in go and go-swagger. I am following steps in Simple Server tutorial in goswagger.io.
I am using Ubuntu 18.04, swagger v0.25.0 and go 1.15.6.
Following the same steps, there are a few differences of the files generated. For instance, goswagger.io's has find_todos_okbody.go and get_okbody.go in models but mine does not. Why is that so?
Link to screenshot of my generated files vs
Link to screenshot of generated files by swagger.io
Starting the server as written in the tutorial go install ./cmd/todo-list-server/ gives me the following error. Can anyone please help with this?
# my_folder/swagger-todo-list/restapi
restapi/configure_todo_list.go:41:8: api.TodosGetHandler undefined (type *operations.TodoListAPI has no field or method TodosGetHandler)
restapi/configure_todo_list.go:42:6: api.TodosGetHandler undefined (type *operations.TodoListAPI has no field or method TodosGetHandler)
The first step in goswagger.io todo-list is swagger init spec .... Which directory should I run this command in? I ran it in a newly created folder in my home directory. However, from the page, it shows the path to be ~/go/src/github.com/go-swagger/go-swagger/examples/tutorials/todo-list. I am not sure whether I should use go get ..., git clone ... or create those folders. Can someone advise me?
Thanks.
This is likely the documentation lagging behind the version of the code that you are running. As long as it compiles, the specific files the tool generates isn't so crucial.
This is a compilation error. When you do go install foo it will try to build the foo package as an executable and then move that to your GOPATH/bin directory. It seems that the generated code in restapi/configure_todo_list.go isn't correct for the operations code generated.
All you need to run this tutorial yourself is an empty directory and the swagger tool (not its source code). You run the commands from the root of this empty project. In order not to run into GOPATH problems I would initialise a module with go mod init todo-list-example before doing anything else.
Note that while the todo-list example code exists inside the go-swagger source, it's there just for documenting example usage and output.
What I would advice for #2 is to make sure you're using a properly released version of go-swagger, rather than installing from the latest commit (which happens when you just do a go get), as I have found that to be occasionally unstable.
Next, re-generate the entire server, but make sure you also regenerate restapi/configure_todo_list.go by passing --regenerate-configureapi to your swagger generate call. This file isn't always refreshed because you're meant to modify it to configure your app, and if you changed versions of the tool it may be different and incompatible.
If after that you still get the compilation error, it may be worth submitting a bug report at https://github.com/go-swagger/go-swagger/issues.
Thanks #EzequielMuns. The errors in #2 went away after I ran go get - u -f ./... as stated in
...
For this generation to compile you need to have some packages in your GOPATH:
* github.com/go-openapi/runtime
* github.com/jessevdk/go-flags
You can get these now with: go get -u -f ./...
I think it's an error of swagger code generation. You can do as folloing to fix this:
delete file configure_todo_list.go;
regenerate code.
# swagger generate server -A todo-list -f ./swagger.yml
Then, you can run command go install ./cmd/todo-list-server/, it will succeed.
It's a go module question.
My PC is running with go 1.13 and go module mode is on.
This my go env:
GO111MODULE="on"
GOPRIVATE=""
GOPROXY="https://goproxy.io,direct"
At first I wrote a public package for testing and uploaded it to github. And then I "go get" this package for independence. After that I made it private and even deleted it from github (I tried "git clone" and couldn't download it again). But I could "go get" it after I removed it from github. Soon I realized it that maybe this package was cached in goproxy.io or other proxy databases. So I set GOPROXY="direct" and "go get" this package again and failed. This action proved my guess.
Now it's my question:
How to remove this whole package from goproxy.io or other database.
Is there a safe way to use go module, I don't want to upload my private code to other databases by mistake.
I tried to STFW and found nothing. Thank U to all people for reading and answering this question.
If you accidentally published a package / module you intend to be private, then go.dev: About page:
Removing a package
If you would like a package removed, please send an email to go-discovery-feedback#google.com, with the import path or module path that you want to remove.
But as Adrian mentioned in the comments, there is no guarantee that no one downloaded your published packages.
If you want some packages / modules to remain private, you may enumerate them (using glob patterns) in the GOPRIVATE, GONOPROXY, GONOSUMDB environment variables, which are respected by the go tool.
Command go: Environment variables:
GOPRIVATE, GONOPROXY, GONOSUMDB
Comma-separated list of glob patterns (in the syntax of Go's path.Match)
of module path prefixes that should always be fetched directly
or that should not be compared against the checksum database.
See 'go help module-private'.
From command go help module-private:
The GOPRIVATE environment variable controls which modules the go command
considers to be private (not available publicly) and should therefore not use the
proxy or checksum database. The variable is a comma-separated list of
glob patterns (in the syntax of Go's path.Match) of module path prefixes.
These vars can also be set using the go env -w command. You may get more help about it using go help env.
For Question2, I have tried several times today.
If u want to build a private package safely, the most important thing you should do is setting the GOPRIVATE BEFORE u build your package. And GONOPROXY,GONOSUMDB will be automatically set to same as GOPRIVATE.
Now u can write the code and git push to a private remote repo and try to go get it, and u will fail and see some error message like it:
fatal: could not read Username for 'https://github.com': terminal prompts disabled
Confirm the import path was entered correctly.
If this is a private repository, see https://golang.org/doc/faq#git_https for additional information.
The link show us that we should use https link with your username/password or just replace your https link with ssh link if u upload a key to remote ropo. After doing it, u will succeed to go get it from your source address (your package name) but NOT PROXY.
Futhurmore, let's delete all go module cache by using go clean -modcache and set GOPRIVATE="". I will test whether our private package was uploaded to proxy.
case 1:
Set GOPROXY="https://goproxy.io" or other proxy and thenen go get the private package.
u will face a 404 Not Found which show u that u find NOTHING from proxy (it meant nothing was cached/stored in proxy) .
case 2:
Set GOPROXY="direct"(use the direct address of your pacakage name) and then go get the private package.
u will face error message like it:
verifying {PACKAGENAME}: {PACKAGENAME}: initializing sumweb.Conn: checking tree#{ID}: Get https://sum.golang.org/tile/8/2/000.p/11: dial tcp {IP}:{PORT}: i/o timeout.
The go get function will try to check the checksum from golang.org database with your package (I can't link to google server directly so it shows timeout error / I guess u will get 404 if u can link to google server). It shows that if we try to go get a private package with not setting GOPRIVATE, u will fail because u can not pass the check.
Suggestion:
If you want to build your private go package, u should set your GOPRIVATE firstly and make sure it is wide enough to INCLUDE your package name.
Thank U to all people for reading and answering this question.
Iam trying to build apprtc signaling server(collider). Based on tutorial, we only need to enter
go get collidermain
after setting $GOPATH. But I got error like this
> go get collider/collidermain
src/collider/collidermain/main.go:9:2: no buildable Go source files in /home/abdulmanaf/poc/apprtcNewVersion/apprtc/src/collider
Then I had tried to build collider folder. But I got error like this
> go get collider/collider
# golang.org/x/net/websocket
src/golang.org/x/net/websocket/dial.go:18:19: error: reference to undefined identifier ‘tls.DialWithDialer’
conn, err = tls.DialWithDialer(dialer, "tcp", parseAuthority(config.Location), config.TlsConfig)
What is the actual issue related to this? I need to build and deploy collider application
Sounds like you're using a really old version of go. Could you run go version?
tls.DialWithDialer was added in go 1.3 in 2014.
I have created a go script that compiles, starts, checks the status, and ends a web service I created (that is also in go). However, I have come to a road block.
With the compile feature I run the following command:
go install .
Which gives the following error:
./script.go:55: main redeclared in this block
previous declaration at ./hello.go:8
Which makes sense as I have two different files, both with the main func and main package. I also tried moving the script to another folder and then changing the command ran to:
go install {path}
Where {path} is equal to the path I want installed/compiled. Which I then got the following error:
exit status 1: can't load package: package /var/www/test.com/go: import "/var/www/test.com/go": cannot import absolute path
So in conclusion I have thought of only one solution (and I am up to hear others if mine isn't the best approach). My idea is to exclude the script file from compiling with the rest of the files, but I am unsure how to.
I did some research and couldn't find an easy way to do it (such as an --exclude flag with the go install command). Does anybody know how to accomplish what I am trying to achieve?
Thank you.
you could give the hello.go a different package name, that should work. Or i am missing something?
Regards
Tim
Trying to understand how one builds a tool consuming the Openshift Origin and Kubernetes APIs (I'm new to Go). It seems that I have a version of Kubernetes installed from Openshift and another version installed by godep and I'm getting all sorts of exciting version mismatches.
Here's my code so far:
package main
import (
kclient "k8s.io/kubernetes/pkg/client/unversioned"
client "github.com/openshift/origin/pkg/client"
)
func main() {
config := kclient.Config{
Host: "...",
}
client.SetOpenShiftDefaults(&config)
client := client.NewOrDie(&config)
}
I then did a go get github.com/openshift/origin which I can see has a copy of Kubernetes in it's Godeps/_workspace/src directory.
However when I do a godep save I get:
godep: Package (k8s.io/kubernetes/pkg/client/unversioned) not found
If I do a go get to install Kubernetes I get a version that doesn't match with the version used by Openshift. What's the correct way to do this?