k8s自定义资源类型代码自动生成

小灰灰 2022-01-07 06:21 183阅读 0赞

> 作者：小碗汤，一位热爱、认真写作的小伙，目前维护原创公众号：『我的小碗汤』，专注于写golang、docker、kubernetes等知识等提升硬实力的文章，期待你的关注。转载说明：务必注明来源（注明：来源于公众号：我的小碗汤， 作者：小碗汤）

--------------------

## 正文 ##

用以下命令生成代码：

./generate-groups.sh all "github.com/openshift-evangelist/crd-code-generation/pkg/client" "github.com/openshift-evangelist/crd-code-generation/pkg/apis" "ingressgroup:v1"

### 第一个报错 ###

生成代码报错：

Generating deepcopy funcs
    F0910 19:18:35.552948   12153 main.go:82] Error: Failed making a parser: unable to add directory "github.com/openshift-evangelist/crd-code-generation/pkg/client": unable to import "github.com/asdfsx/getkubeconfig/pkg/apis/example/v1": cannot find package "github.com/openshift-evangelist/crd-code-generation/pkg/client" in any of:
            D:/Program Files/Go/go103/src/github.com/openshift-evangelist/crd-code-generation/pkg/client (from $GOROOT)
            D:/SoftwareAndProgram/program/Go/Development/src/github.com/openshift-evangelist/crd-code-generation/pkg/client (from $GOPATH)

这个问题可以参考[issue][]  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9saWFiaW8uYmxvZy5jc2RuLm5ldA_size_16_color_FFFFFF_t_70]

可以参考这个文章：  
https://medium.com/@trstringer/create-kubernetes-controllers-for-core-and-custom-resources-62fc35ad64a3

由于该链接国内访问比较困难，故转载到了这里：  
[https://www.jianshu.com/p/dcfe6eac4152][https_www.jianshu.com_p_dcfe6eac4152]

总而言之，就是目录有问题。比如：

./generate-groups.sh all k8s.io/sample-controller/pkg/client k8s.io/sample-controller/pkg/apis samplecontroller:v1alpha1

那么`k8s.io/sample-controller/pkg/apis`目录下就需要有一个`samplecontroller/v1alpha1`的文件夹，最终生成的文件会被放到`k8s.io/sample-controller/pkg/client`目录下。

[root@10 code-generator]# ./generate-groups.sh all k8s.io/sample-controller/pkg/client k8s.io/sample-controller/pkg/apis samplecontroller:v1alpha1
    Generating deepcopy funcs
    Generating clientset for samplecontroller:v1alpha1 at k8s.io/sample-controller/pkg/client/clientset
    Generating listers for samplecontroller:v1alpha1 at k8s.io/sample-controller/pkg/client/listers
    Generating informers for samplecontroller:v1alpha1 at k8s.io/sample-controller/pkg/client/informers
    [root@10 code-generator]# ll $GOPATH/src/k8s.io/sample-controller/pkg/
    总用量 0
    drwxr-xr-x 3 root root 30 4月  16 21:42 apis
    drwxr-xr-x 5 root root 55 4月  16 21:58 client
    [root@10 code-generator]# ll $GOPATH/src/k8s.io/sample-controller/pkg/apis/samplecontroller/v1alpha1/
    总用量 8
    -rw-r--r-- 1 root root 1462 4月  16 21:42 types.go
    -rw-r--r-- 1 root root 3272 4月  16 21:57 zz_generated.deepcopy.go
    [root@10 code-generator]# ll $GOPATH/src/k8s.io/sample-controller/pkg/client
    总用量 0
    drwxr-xr-x 3 root root 23 4月  16 21:57 clientset
    drwxr-xr-x 3 root root 30 4月  16 21:58 informers
    drwxr-xr-x 3 root root 30 4月  16 21:58 listers

### 第二个报错： ###

Generating deepcopy funcs
    F1104 02:57:44.419529      35 main.go:82] Error: Failed executing generator: some packages had errors:
    type "k8s.io/apimachinery/pkg/runtime.Object" in k8s:deepcopy-gen:interfaces tag of type k8s.io/apimachinery/pkg/runtime.Object is not an interface, but: ""
    goroutine 1 [running]:

这个报错是因为k8s.io/apimachinery这个包目录结构不对，放到vendor目录下找不到，必须放到$GOPATH下的src/k8s.io/apimachinery，具体参考[issue][issue 1]  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9saWFiaW8uYmxvZy5jc2RuLm5ldA_size_16_color_FFFFFF_t_70 1]

> 我解决了这个问题 。这不起作用，除非k8s.io/apimachinery在GOPATH中，如果它只是在vendor目录下，那么deepcopy无法找到它。至少，这需要在某处记录。如果在vendor目录下也能正常工作，那将会很棒。

目录结构如下：  
$GOPATH/src  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9saWFiaW8uYmxvZy5jc2RuLm5ldA_size_16_color_FFFFFF_t_70 2]

$GOPATH/src/github.com/  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9saWFiaW8uYmxvZy5jc2RuLm5ldA_size_16_color_FFFFFF_t_70 3]

### 第三个报错 ###

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9saWFiaW8uYmxvZy5jc2RuLm5ldA_size_16_color_FFFFFF_t_70 4]

Generating deepcopy funcs
    F0221 09:54:08.335328   26316 main.go:82] Error: Failed executing generator: som                                          e packages had errors:
    errors in package "github.com/openshift-evangelist/crd-code-generation/pkg/apis/                                          ingressgroup/v1":
    unable to format file "D:\\SoftwareAndProgram\\program\\Go\\Development\\src\\gi                                          thub.com\\openshift-evangelist\\crd-code-generation\\pkg\\apis\\ingressgroup\\v1                                          \\zz_generated.deepcopy.go" (The filename, directory name, or volume label synta                                          x is incorrect.).

windows上执行报这个错，需要在linux上执行generate-groups.sh 脚本。

### 最终生成如下： ###

![在这里插入图片描述][20191019161223108.png]

[root@master-192 code-generator]# dos2unix generate-groups.sh 
    dos2unix: converting file generate-groups.sh to Unix format ...
    [root@master-192 code-generator]# ./generate-groups.sh all "github.com/openshift-evangelist/crd-code-generation/pkg/client" "github.com/openshift-evangelist/crd-code-generation/pkg/apis" "ingressgroup:v1"
    Generating deepcopy funcs
    Generating clientset for ingressgroup:v1 at github.com/openshift-evangelist/crd-code-generation/pkg/client/clientset
    Generating listers for ingressgroup:v1 at github.com/openshift-evangelist/crd-code-generation/pkg/client/listers
    Generating informers for ingressgroup:v1 at github.com/openshift-evangelist/crd-code-generation/pkg/client/informers

最终生成目录结构如下：

[root@master-192 crd-code-generation]# pwd
    /root/Work/programmer/go/gopath/src/github.com/openshift-evangelist/crd-code-generation
    [root@master-192 crd-code-generation]# tree
    .
    └── pkg
        ├── apis
        │   └── ingressgroup
        │       ├── register.go
        │       └── v1
        │           ├── doc.go
        │           ├── register.go
        │           ├── types.go
        │           └── zz_generated.deepcopy.go
        └── client
            ├── clientset
            │   └── versioned
            │       ├── clientset.go
            │       ├── doc.go
            │       ├── fake
            │       │   ├── clientset_generated.go
            │       │   ├── doc.go
            │       │   └── register.go
            │       ├── scheme
            │       │   ├── doc.go
            │       │   └── register.go
            │       └── typed
            │           └── ingressgroup
            │               └── v1
            │                   ├── doc.go
            │                   ├── fake
            │                   │   ├── doc.go
            │                   │   ├── fake_ingressgroup_client.go
            │                   │   └── fake_ingressgroup.go
            │                   ├── generated_expansion.go
            │                   ├── ingressgroup_client.go
            │                   └── ingressgroup.go
            ├── informers
            │   └── externalversions
            │       ├── factory.go
            │       ├── generic.go
            │       ├── ingressgroup
            │       │   ├── interface.go
            │       │   └── v1
            │       │       ├── ingressgroup.go
            │       │       └── interface.go
            │       └── internalinterfaces
            │           └── factory_interfaces.go
            └── listers
                └── ingressgroup
                    └── v1
                        ├── expansion_generated.go
                        └── ingressgroup.go

--------------------

# 作者简洁 #

[issue]: https://github.com/kubernetes/code-generator/issues/55
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9saWFiaW8uYmxvZy5jc2RuLm5ldA_size_16_color_FFFFFF_t_70]: /images/20211227/ec4720bfb1ec4820be1118fb326fa5ad.png
[https_www.jianshu.com_p_dcfe6eac4152]: https://www.jianshu.com/p/dcfe6eac4152
[issue 1]: https://github.com/kubernetes/code-generator/issues/21
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9saWFiaW8uYmxvZy5jc2RuLm5ldA_size_16_color_FFFFFF_t_70 1]: /images/20211227/a6356e3c3148402980fa4c3e71f81231.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9saWFiaW8uYmxvZy5jc2RuLm5ldA_size_16_color_FFFFFF_t_70 2]: /images/20211227/8e5ed6ab31f14bceb4f1e1e2e9b499dd.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9saWFiaW8uYmxvZy5jc2RuLm5ldA_size_16_color_FFFFFF_t_70 3]: /images/20211227/c924e794174241f084e51ba546d27d16.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9saWFiaW8uYmxvZy5jc2RuLm5ldA_size_16_color_FFFFFF_t_70 4]: /images/20211227/3a4b641189ff47dead90e6ca6f9886f5.png
[20191019161223108.png]: /images/20211227/96c069fecf3a4fb7bd5f66d1722035ce.png