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TIPS之 Kubernetes Pod动态mount nfs方式

Kubernetes Pod动态mount nfs方式

Kubernetes Pod动态mount nfs方式背景为Pod 挂在一个nfs目录, 临时处理数据使用。确保pod不重启。验证方式准备 nfs-server [root@xxxxx /var/lib/paascontainer/nfs]# exportfs -s /var/lib/paascontainer/nfs *(sync,wdelay,hide,no_subtree_check,sec=sys,rw,secure,no_root_squash,no_all_squash) [root@xxxxx /var/lib/paascontainer/nfs]# showmount -e 172.16.0.8 Export list

Posted by 董江 on Tuesday, October 17, 2023

Golang之 Kubenetes client-go informers添加转换函数, apiserver 内存优化

Kubenetes client-go informers添加转换函数, apiserver 内存优化

Kubenetes client-go informers添加转换函数，apiserver 内存优化" 背景 client-go 函数转换机制 - transform functions 在 Client-go 中，对象放入缓存之前对其进行转换。Cl

Posted by 董江 on Thursday, October 12, 2023

TIPS之 Kernel 开启BTF

Kernel 开启BTF

Kernel 开启BTF 方式背景 BTF（BPF Type Format）是一种元数据格式，对与BPF程序/map有关的调试信息进行编码。与BPF程序/map有关的

Posted by 董江 on Sunday, October 8, 2023

TIPS之 Kubernetes kubelet 与 apiserver 断连后，依旧使用关闭连接

Kubernetes kubelet 与 apiserver 断连后，依旧使用关闭连接

Kubernetes kubelet 与 apiserver 断连后，依旧使用关闭连接现象表现是：通过kubelet 报错，一段时间后节点NotReady。日志： E0906 02:03:08.585672 392662 reflector.go:123] object-"089f93c2"/"a697eaa005a-4b60b0": Failed to list *v1.ConfigMap: Get https://127.0.0.1:6443/api/v1/namespaces/089f93c2/configmaps?fieldSelector=metadata.name%3Da697eaa005a-4b60b0&limit=500&resourceVersion=0: read tcp 127.0.0.1:62060->127.0.0.1:6443: use of closed

Posted by 董江 on Tuesday, September 19, 2023

TIPS之 Kubernetes client-go 常用配置

Kubernetes client-go 常用配置

Kubernetes client-go 常用配置第一篇: Kubernetes client-go使用方式 client-go config 配置 type Config struct { // Host must be a host string, a host:port pair, or a URL to the base of the apiserver. // If a URL is given then the (optional) Path of that URL represents a prefix that must //

Posted by 董江 on Monday, September 18, 2023

TIPS之 Kubernetes APIServer 异常504 GatewayTimeout

Kubernetes APIServer 异常504 GatewayTimeout

Kubernetes APIServer 异常 504 GatewayTimeout 问题一： Kubernetes APIServer 503 logging error output: service unavailable metrics.k8s.io/v1beta1 api-resource 不存在问题 I0908 17:58:06.013828 1 httplog.go:89] "HTTP" verb="GET" URI="/apis/metrics.k8s.io/v1beta1?timeout=32s" latency="511.066µs" userAgent="kubectl/v1.21.5 (linux/amd64) kubernetes/83c85a6" srcIP="10.253.101.202:56436" resp=503 statusStack=" goroutine 178079822 [running]: .... "

Posted by 董江 on Monday, September 11, 2023

Golang之 go实现交替加权轮询-interleaved weighted round robin

golang 实现交替加权轮询-interleaved weighted round robin 背景背景实现： O(1) 时间复杂度和 O(n) 空间复杂度的加权负载平衡实现交错式加权轮询负载均衡算法 interleaved weighted round robin

Posted by 董江 on Thursday, August 31, 2023

运行时之 nydus vs estargz image format对比

nydus vs estargz image format对比

nydus vs estargz image format对比背景 OCIv2 vs OCIv1 OCIv1是开源容器规定的镜像格式标准(image format spec). OCIv2是解决OCIv1部分问题后，解决的镜像标准

Posted by 董江 on Monday, August 28, 2023