kubernetes-client/c
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* Update the usage example in README.md because kubernetes-client/c has supported loading cluster configuration to authentication.

* Update some examples to keep consistence with README.md
This commit is contained in:
Hui Yu
2020-06-28 12:24:08 +08:00
parent 194bec6f67
commit 9e5533206e
4 changed files with 95 additions and 47 deletions
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1
.gitignore vendored
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@@ -1,4 +1,5 @@
kubernetes/build/
.vs/
# Prerequisites
*.d

76
README.md
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@@ -31,23 +31,28 @@ make
```
## Running the example
For now, you need to use `kubectl proxy` to handle authentication.
```bash
kubectl proxy
./list_pod_bin
```
## Usage example
list all pods:
```c
list_t *apiKeys;
apiKeys = list_create();
keyValuePair_t *keyPairToken = keyValuePair_create(keyToken, valueToken);
list_addElement(apiKeys, keyPairToken);
g_k8sAPIConnector = apiClient_create_with_base_path(K8S_APISERVER_BASEPATH, NULL, apiKeys);
char *basePath = NULL;
sslConfig_t *sslConfig = NULL;
list_t *apiKeys = NULL;
int rc = load_kube_config(&basePath, &sslConfig, &apiKeys, NULL);/* NULL means loading configuration from $HOME/.kube/config */
if (rc != 0) {
printf("Cannot load kubernetes configuration.\n");
return -1;
}
apiClient_t *apiClient = apiClient_create_with_base_path(basePath, sslConfig, apiKeys);
if (!apiClient) {
printf("Cannot create a kubernetes client.\n");
return -1;
}
v1_pod_list_t *pod_list = NULL;
pod_list = CoreV1API_listNamespacedPod(apiClient,
@@ -66,8 +71,59 @@ kubectl proxy
if (pod_list) {
...
}
apiClient_free(apiClient);
apiClient = NULL;
free_client_config(basePath, sslConfig, apiKeys);
basePath = NULL;
sslConfig = NULL;
apiKeys = NULL;
```
list all pods in cluster:
```c
char *basePath = NULL;
sslConfig_t *sslConfig = NULL;
list_t *apiKeys = NULL;
int rc = load_incluster_config(&basePath, &sslConfig, &apiKeys);
if (rc != 0) {
printf("Cannot load kubernetes configuration in cluster.\n");
return -1;
}
apiClient_t *apiClient = apiClient_create_with_base_path(basePath, sslConfig, apiKeys);
if (!apiClient) {
printf("Cannot create a kubernetes client.\n");
return -1;
}
v1_pod_list_t *pod_list = NULL;
pod_list = CoreV1API_listNamespacedPod(apiClient,
"default", /*namespace */
NULL, /* pretty */
0, /* allowWatchBookmarks */
NULL, /* continue */
NULL, /* fieldSelector */
NULL, /* labelSelector */
0, /* limit */
NULL, /* resourceVersion */
0, /* timeoutSeconds */
0 /* watch */
);
printf("return code=%ld\n", apiClient->response_code);
if (pod_list) {
...
}
apiClient_free(apiClient);
apiClient = NULL;
free_client_config(basePath, sslConfig, apiKeys);
basePath = NULL;
sslConfig = NULL;
apiKeys = NULL;
```
## Community, discussion, contribution, and support
Learn how to engage with the Kubernetes community on the [community page](http://kubernetes.io/community/).

32
examples/list_pod/main.c
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@@ -37,32 +37,28 @@ void list_pod(apiClient_t * apiClient)
int main(int argc, char *argv[])
{
int rc = 0;
char *baseName = NULL;
char *basePath = NULL;
sslConfig_t *sslConfig = NULL;
list_t *apiKeys = NULL;
apiClient_t *k8sApiClient = NULL;
rc = load_kube_config(&baseName, &sslConfig, &apiKeys, NULL);
if (0 == rc) {
k8sApiClient = apiClient_create_with_base_path(baseName, sslConfig, apiKeys);
} else {
int rc = load_kube_config(&basePath, &sslConfig, &apiKeys, NULL); /* NULL means loading configuration from $HOME/.kube/config */
if (rc != 0) {
printf("Cannot load kubernetes configuration.\n");
return -1;
}
if (k8sApiClient) {
list_pod(k8sApiClient);
apiClient_t *apiClient = apiClient_create_with_base_path(basePath, sslConfig, apiKeys);
if (!apiClient) {
printf("Cannot create a kubernetes client.\n");
return -1;
}
free_client_config(baseName, sslConfig, apiKeys);
baseName = NULL;
list_pod(apiClient);
apiClient_free(apiClient);
apiClient = NULL;
free_client_config(basePath, sslConfig, apiKeys);
basePath = NULL;
sslConfig = NULL;
apiKeys = NULL;
apiClient_free(k8sApiClient);
k8sApiClient = NULL;
return rc;
return 0;
}

33
examples/list_pod_incluster/main.c
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@@ -38,32 +38,27 @@ void list_pod(apiClient_t * apiClient)
int main(int argc, char *argv[])
{
int rc = 0;
char *baseName = NULL;
char *basePath = NULL;
sslConfig_t *sslConfig = NULL;
list_t *apiKeys = NULL;
apiClient_t *k8sApiClient = NULL;
rc = load_incluster_config(&baseName, &sslConfig, &apiKeys);
if (0 == rc) {
k8sApiClient = apiClient_create_with_base_path(baseName, sslConfig, apiKeys);
} else {
printf("Cannot load kubernetes configuration.\n");
int rc = load_incluster_config(&basePath, &sslConfig, &apiKeys);
if (rc != 0) {
printf("Cannot load kubernetes configuration in cluster.\n");
return -1;
}
if (k8sApiClient) {
list_pod(k8sApiClient);
apiClient_t *apiClient = apiClient_create_with_base_path(basePath, sslConfig, apiKeys);
if (!apiClient) {
printf("Cannot create a kubernetes client.\n");
return -1;
}
list_pod(apiClient);
free_client_config(baseName, sslConfig, apiKeys);
baseName = NULL;
apiClient_free(apiClient);
apiClient = NULL;
free_client_config(basePath, sslConfig, apiKeys);
basePath = NULL;
sslConfig = NULL;
apiKeys = NULL;
apiClient_free(k8sApiClient);
k8sApiClient = NULL;
return rc;
return 0;
}