144 lines
4.5 KiB
Markdown
144 lines
4.5 KiB
Markdown
# Kubernetes Client Library for C
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This is the official Kubernetes client library for the C programming language.
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It is a work in progress and should be considered _alpha_ quality software at this
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time.
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## Building the library
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```bash
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# Clone the repo
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git clone https://github.com/kubernetes-client/c
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CLIENT_REPO_ROOT=${PWD}/c
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# Install pre-requisites
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sudo apt-get install libcurl4-openssl-dev uncrustify libyaml-dev
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# Move into the Kubernetes directory
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cd ${CLIENT_REPO_ROOT}/kubernetes
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# Build
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mkdir build
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cd build
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cmake -DCMAKE_INSTALL_PREFIX=/usr/local/lib ..
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make
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sudo make install
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```
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## Building an example
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```bash
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cd ${CLIENT_REPO_ROOT}/examples/list_pod
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make
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```
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## Running the example
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```bash
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./list_pod_bin
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```
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## Usage example
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list all pods:
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```c
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char *basePath = NULL;
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sslConfig_t *sslConfig = NULL;
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list_t *apiKeys = NULL;
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int rc = load_kube_config(&basePath, &sslConfig, &apiKeys, NULL);/* NULL means loading configuration from $HOME/.kube/config */
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if (rc != 0) {
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printf("Cannot load kubernetes configuration.\n");
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return -1;
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}
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apiClient_t *apiClient = apiClient_create_with_base_path(basePath, sslConfig, apiKeys);
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if (!apiClient) {
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printf("Cannot create a kubernetes client.\n");
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return -1;
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}
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v1_pod_list_t *pod_list = NULL;
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pod_list = CoreV1API_listNamespacedPod(apiClient,
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"default", /*namespace */
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NULL, /* pretty */
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0, /* allowWatchBookmarks */
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NULL, /* continue */
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NULL, /* fieldSelector */
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NULL, /* labelSelector */
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0, /* limit */
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NULL, /* resourceVersion */
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0, /* timeoutSeconds */
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0 /* watch */
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);
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printf("return code=%ld\n", apiClient->response_code);
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if (pod_list) {
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...
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}
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apiClient_free(apiClient);
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apiClient = NULL;
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free_client_config(basePath, sslConfig, apiKeys);
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basePath = NULL;
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sslConfig = NULL;
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apiKeys = NULL;
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apiClient_unsetupGlobalEnv();
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```
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list all pods in cluster:
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```c
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char *basePath = NULL;
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sslConfig_t *sslConfig = NULL;
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list_t *apiKeys = NULL;
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int rc = load_incluster_config(&basePath, &sslConfig, &apiKeys);
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if (rc != 0) {
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printf("Cannot load kubernetes configuration in cluster.\n");
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return -1;
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}
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apiClient_t *apiClient = apiClient_create_with_base_path(basePath, sslConfig, apiKeys);
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if (!apiClient) {
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printf("Cannot create a kubernetes client.\n");
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return -1;
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}
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v1_pod_list_t *pod_list = NULL;
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pod_list = CoreV1API_listNamespacedPod(apiClient,
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"default", /*namespace */
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NULL, /* pretty */
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0, /* allowWatchBookmarks */
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NULL, /* continue */
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NULL, /* fieldSelector */
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NULL, /* labelSelector */
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0, /* limit */
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NULL, /* resourceVersion */
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0, /* timeoutSeconds */
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0 /* watch */
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);
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printf("return code=%ld\n", apiClient->response_code);
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if (pod_list) {
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...
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}
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apiClient_free(apiClient);
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apiClient = NULL;
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free_client_config(basePath, sslConfig, apiKeys);
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basePath = NULL;
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sslConfig = NULL;
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apiKeys = NULL;
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apiClient_unsetupGlobalEnv();
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```
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## Community, discussion, contribution, and support
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Learn how to engage with the Kubernetes community on the [community page](http://kubernetes.io/community/).
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You can reach the maintainers of this project at:
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- [Slack](http://slack.k8s.io/)
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- [Mailing List](https://groups.google.com/forum/#!forum/kubernetes-dev)
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### Code of conduct
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Participation in the Kubernetes community is governed by the [Kubernetes Code of Conduct](code-of-conduct.md).
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[owners]: https://git.k8s.io/community/contributors/guide/owners.md
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[Creative Commons 4.0]: https://git.k8s.io/website/LICENSE
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