Sunday Blog

人生是一场刻意练习

Python中的格式化

Python Format

%运算符 使用字符串模运算符（%）格式化输出： % 运算符也可用于字符串格式化。它将左参数解释为类似于 C 语言字符串中的 printf() 样式格式，以应用于右参数。

Posted by BlueFat on Monday, August 8, 2022

冒泡排序算法

Bubble Sort Algorithm

排序算法的稳定性 稳定的排序算法会让原本有相等键值的记录维持相对次序 不稳定的排序算法可能会改变相等键值的记录的相对次序 冒泡排序 冒泡排序的思想就

Posted by BlueFat on Saturday, August 6, 2022

Python中的sort与sorted区别

一、 sort sort() 函数用于对原列表进行排序，如果指定参数，则使用比较函数指定的比较函数 原型：sort（key，reverse=False） key：用来

Posted by BlueFat on Saturday, August 6, 2022

Python Str 字符串操作

Python String Operator

字符串str 不可变对象，Python3，字符串为Unicode类型 >>> s5=r"hello \n world" #非转义的原始字符串，即不是换行了。 hello \n world >>> name='sunday'; age=17 s9=f'{name},{age}' #3.6支持f前

Posted by BlueFat on Friday, August 5, 2022

Python 判断素数

Prime Number

求n以内的素数 常规取模优化 只测试 >2 的奇数，因为大于2的质数只可能是奇数 奇数只和一个奇数取模，因为奇数不能被合数整除 找到开方点 [3,int(x**0.5)+1] import datetime start = datetime.datetime.now() n=100000 count=1

Posted by BlueFat on Monday, August 1, 2022

Firewalld ipset 使用

Firewall Ipset

一.firewalld中ipset的用途: 1.用途: ipset是ip地址的集合，firewalld使用ipset可以在一条规则中处理多个ip

Posted by BlueFat on Saturday, June 18, 2022

Kubernetes 1.24 二进制高可用集群安装

Kubernetes Binary Build High Availability

生产环境中，建议使用版本大于5的Kubernetes版本，如1.24.6 系统：CentOS 7.5 K8S：1.24.6 containerd: v1.6.4 calico: 1.24 集群环境 hostname IP/VIP software k8s-master01 192.168.1.171 e

Posted by BlueFat on Tuesday, May 17, 2022

Kubeadm搭建高可用Kubernetes v1.23.5集群

Kubeadm Builds High Availability Kubernetes

基础环境配置 IP地址 主机名 服务 配置 192.168.1.171 k8s-01 k8s-master、containerd、keepalived、nginx 2c4g 192.168.1.172 k8s-02 k8s-master

Posted by BlueFat on Tuesday, May 17, 2022

Kubernetes使用 OpenEBS 实现 Local PV 动态持久化存储

Openebs

仅限开发测试使用 OpenEBS安装条件 # 安装 iscsi yum install iscsi-initiator-utils -y # 查看 InitiatorName 是否正常配置 cat /etc/iscsi/initiatorname.iscsi # 启动查看状态 systemctl enable --now iscsid systemctl start iscsid.service systemctl status iscsid.service openebs quickstart 安装方式 方式一 helm helm repo add openebs

Posted by BlueFat on Thursday, January 20, 2022

Nodelocaldns 导致 Coredns hosts 失效

Coredns Host Invalid

问题：coredns configmap 添加hosts不起作用 coredns: 10.233.0.3 nodelocaldns: 169.254.25.10 kubectl edit configmap coredns -n kube-system apiVersion: v1 data: Corefile: | .:53 { errors health { lameduck 5s } log ready kubernetes cluster.local in-addr.arpa ip6.arpa { pods insecure fallthrough in-addr.arpa ip6.arpa } ## 添加部分 hosts { 192.168.10.220 rancher.sundayhk.com 192.168.10.220 ha.sundayhk.com fallthrough

Posted by BlueFat on Wednesday, November 17, 2021

Ubuntu 16.04 Letsencrypt R3证书过期

Letsencrypt Certificate Has Expired

root@sunday:~# curl https://letsencrypt.org/ curl: (60) server certificate verification failed. CAfile: /etc/ssl/certs/ca-certificates.crt CRLfile: none More details here: http://curl.haxx.se/docs/sslcerts.html curl performs SSL certificate verification by default, using a "bundle" of Certificate Authority (CA) public keys (CA certs). If the default bundle file isn't adequate, you can specify an alternate file using the --cacert option. If this HTTPS server uses a certificate signed by a CA represented in the bundle, the certificate verification

Posted by BlueFat on Tuesday, October 5, 2021

Acme Sh Docker

Acme Sh Docker

docker run docker run --rm -itd \ -v "$(pwd)/out":/acme.sh \ -e CF_Email="xxxxxxxxxxxxxxxxxx@gmail.com" \ -e CF_Key="xxxxxxxxxxxxxxxxxx" \ --net=host \ --name=acme.sh \ neilpang/acme.sh daemon docker-compose docker-compose.yml version: '3' services: acme-sh: image: neilpang/acme.sh container_name: acme.sh restart: always command: daemon environment: - CF_Key="xxxxxxxxxxxxxxxxxx" - CF_Email=xxxxxxxxxxxxxxxxxx@gmail.com" volumes: - /data/acme:/acme.sh network_mode: host issue acme.sh --register-account -m my@example.com docker exec acme.sh --issue --dns dns_cf -d sundayhk.com -d *.sundayhk.com --debug #docker exec acme.sh --install-cert --reloadcmd "systemctl reload nginx" -d $domain --key-file /data/ssl/$domain.

Posted by BlueFat on Tuesday, July 20, 2021

Nginx 反代Rancher

Rancher Proxy

报错 E1115 18:35:27.342087 34 upgradeaware.go:338] Proxy upgrade error: invalid upgrade response: status code 200 正确配置 server { listen 443; server_name rancher.sundayhk.com; ssl on; ssl_certificate /data/ssl/acme/sundayhk.com.pem; ssl_certificate_key /data/ssl/acme/sundayhk.com.key; include other/ssl.conf; location / { proxy_pass https://192.168.10.220:443; proxy_set_header Host $host; proxy_set_header X-Real-IP $remote_addr; proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; proxy_set_header REMOTE-HOST $remote_addr; proxy_http_version 1.1; proxy_set_header Upgrade $http_upgrade; proxy_set_header Connection $connection_upgrade; } } vim /etc/nginx/nginx.conf http { ... map $http_upgrade $connection_upgrade { default

Posted by BlueFat on Wednesday, June 16, 2021

安装Kuboard管理Kubernetes集群

Kuboard

https://kuboard.cn/install/v3-upgrade.html#%E5%A6%82%E6%9E%9C%E4%BB%A5-docker-run-%E8%BF%90%E8%A1%8C-kuboard 安装方式 Kuboard 作为多个集群的管理界面应该独立于任何集群之外 建议docker运行 Kuboard, 不建议安装在有业务的Kubernetes集群中 停止已有 kuboard 容器 docker

Posted by BlueFat on Friday, May 21, 2021

Kubespray 离线安装配置

Kubespray Offline

https://github.com/kubernetes-sigs/kubespray/blob/master/docs/offline-environment.md 背景 在国内使用 kubespray 安装 Kubernetes 集群，下载依赖的文件和镜像时，往往会遇到下载失败，这时我们可以利用 kubespray 离线安装配置的能力来部署集群。 准备工作 要想离线安

Posted by BlueFat on Tuesday, May 11, 2021

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