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TIPS之 Kubernetes 自定义缩放: prometheus-adpater vs keda

Kubernetes 自定义缩放: prometheus-adpater vs keda

Kubernetes 自定义缩放: prometheus-adpater vs keda 背景 Kubernetes 官方主要支持基于 Pod CPU/Memory 的伸缩，这是应用最为广泛的伸缩指标，需要部署 metrics-server 才可使用。可以对pod进行指标设置： apiVersion: autoscaling/v2beta2 kind: HorizontalPodAutoscaler metadata: labels:

Posted by 董江 on Thursday, November 9, 2023

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