跳至主要內容
页面配置

more 注释之前的内容被视为文章摘要。

Ms.Hope大约 1 分钟使用指南页面配置使用指南
MYSQL安装步骤

一、 初始化

vim /etc/hosts
setenforce 0
sed -i 's/SELINUX=enforcing/SELINUX=disabled/g' /etc/selinux/config
systemctl stop firewalld
systemctl disable firewalld

# 删除已有mysql
rpm -qa | grep mysql　　#查找是否存在已安装的mysql
yum remove mysql-community-common-x.x.xx-1.el7.x86_64　　#如果找到，则依次卸载全部安装包
find / -name *mysql*　　#查找mysql的残余文件
rm -rf /usr/lib64/mysql　　#如果找到，则依次删除所有残余文件
yhma大约 3 分钟MYSQL
MYSQL搭建

初始化

setenforce 0
sed -i 's/SELINUX=enforcing/SELINUX=disabled/g' /etc/selinux/config
systemctl stop firewalld
systemctl disable firewalld
yhma小于 1 分钟MYSQL
MYSQL优化参数说明

# 基础配置  
datadir=/data/datafile  
socket=/var/lib/mysql/mysql.sock  
log-error=/data/log/mysqld.log  
pid-file=/var/run/mysqld/mysqld.pid  
character_set_server=utf8  
# 允许任意IP访问  
bind-address = 0.0.0.0  
# 支持大小写  
lower_case_table_names=1  
# 二进制配置  
server-id = 1  
log-bin = /data/log/mysql-bin.log  
log-bin-index =/data/log/binlog.index  
log_bin_trust_function_creators=1  
expire_logs_days=7  
# InnoDB存储数据字典、内部数据结构的缓冲池，16MB已经足够大了。  
innodb_additional_mem_pool_size = 16M  
# InnoDB用于缓存数据、索引、锁、插入缓冲、数据字典等,如果是专用的DB服务器，且以InnoDB引擎为主的场景，通常可设置物理内存的60%, 如果是非专用DB服务器，可以先尝试设置成内存的1/4  
innodb_buffer_pool_size = 4G  
# InnoDB的log buffer，通常设置为 64MB 就足够了  
innodb_log_buffer_size = 64M  
# InnoDB redo log大小，通常设置256MB 就足够了  
innodb_log_file_size = 256M  
# InnoDB redo log文件组，通常设置为 2 就足够了  
innodb_log_files_in_group = 2  
# 设置临时表空间最大4G  
innodb_temp_data_file_path=ibtmp1:500M:autoextend:max:4096M  
# 启用InnoDB的status file，便于管理员查看以及监控  
innodb_status_file = 1  
# 当设置为0，该模式速度最快，但不太安全，mysqld进程的崩溃会导致上一秒钟所有事务数据的丢失。  
# 当设置为1，该模式是最安全的，但也是最慢的一种方式。在mysqld 服务崩溃或者服务器主机crash的情况下，binary log 只有可能丢失最多一个语句或者一个事务。  
# 当设置为2，该模式速度较快，也比0安全，只有在操作系统崩溃或者系统断电的情况下，上一秒钟所有事务数据才可能丢失。  
innodb_flush_log_at_trx_commit = 1  
# 设置事务隔离级别为 READ-COMMITED，提高事务效率，通常都满足事务一致性要求  
transaction_isolation = READ-COMMITTED  
  
max_connections=600  
max_connect_errors=1000  
max_user_connections=400  
# 设置临时表最大值，这是每次连接都会分配，不宜设置过大 max_heap_table_size 和 tmp_table_size 要设置一样大  
max_heap_table_size = 100M  
tmp_table_size = 100M  
# 每个连接都会分配的一些排序、连接等缓冲，一般设置为 2MB 就足够了  
sort_buffer_size = 2M  
join_buffer_size = 2M  
read_buffer_size = 2M  
read_rnd_buffer_size = 2M  
# 建议关闭query cache，有些时候对性能反而是一种损害  
query_cache_size = 0  
# 如果是以InnoDB引擎为主的DB，专用于MyISAM引擎的 key_buffer_size 可以设置较小，8MB 已足够  
# 如果是以MyISAM引擎为主，可设置较大，但不能超过4G  
key_buffer_size = 8M  
# 设置连接超时阀值，如果前端程序采用短连接，建议缩短这2个值，如果前端程序采用长连接，可直接注释掉这两个选项，是用默认配置(8小时)  
interactive_timeout = 1200  
wait_timeout = 120  
# InnoDB使用后台线程处理数据页上读写I/0请求的数量,允许值的范围是1-64  
innodb_read_io_threads=5  
innodb_write_io_threads=3  
# 设置慢查询阀值，单位为秒  
long_query_time = 120  
slow_query_log=1  
# 日志输出会写表，也会写日志文件，为了便于程序去统计，所以最好写表  
log_output=table,File  
slow_query_log_file=/data/log/slow.log  
# 针对log_queries_not_using_indexes开启后，记录慢sql的频次、每分钟记录的条数  
log_throttle_queries_not_using_indexes = 5  
# 作为从库时生效,从库复制中如何有慢sql也将被记录  
log_slow_slave_statements = 1  
# 检查未使用到索引的sql  
log_queries_not_using_indexes = 1  
# 快速预热缓冲池  
innodb_buffer_pool_dump_at_shutdown=1  
innodb_buffer_pool_load_at_startup=1  
# 打印deadlock日志  
innodb_print_all_deadlocks=1
yhma大约 3 分钟MYSQL
MYSQL查看大事务

mysql8查看大事务

文章目录

1、查看大事务的原因

大事务的特点是执行时间长，长期占有锁不释放，导致其他想操作同一行数据的线程阻塞，如果客户端设置了超时时间，超时后，客户端进行重试，又会申请一个mysql线程，然后再阻塞，最终会造成整个mysql库的线程枯竭，整个mysql库不可用，危害极大。
所以，对于开发人员来说，非常有必要知道如何查看长事务，如何终止掉大事务。

yhma大约 4 分钟MYSQL
K8S命令案例
# https://download.docker.com/linux/static/stable/x86_64/

 kubeadm init --pod-network-cidr=10.244.0.0/16
   kubectl apply -f https://raw.githubusercontent.com/coreos/flannel/master/Documentation/kube-flannel.yml
   exit
   kubectl get svc -n kube-system
   kubectl get svc
   kubectl apply -f https://raw.githubusercontent.com/coreos/flannel/master/Documentation/kube-flannel.yml
kubectl get nodes
systemctl start kubectl
systemctl start kubelet
systemctl enable --now kubelet
   kubectl get nodes
   kubectl
   kubectl get nodes
   kubelet
   kubectl get nodes
   systemctl status kubelet
   systemctl status kubectl
   export KUBECONFIG=/etc/kubernetes/admin.conf
   systemctl status kubectl
   kubectl get nodes
   ls
   echo "export KUBECONFIG=/etc/kubernetes/admin.conf" >> ~/.bash_profile
   source ~/.bash_profile
   kubectl get nodes
   kubectl get nodes -a
   kubectl get pods
   kubectl get pods --all-namespaces
   kubectl apply -f https://raw.githubusercontent.com/coreos/flannel/master/Documentation/kube-flannel.yml
   kubectl get pods --all-namespaces
   kubectl get nodes
   kubectl get pods --all-namespaces
   kubectl apply -f https://raw.githubusercontent.com/kubernetes/dashboard/v2.2.0/aio/deploy/recommended.yaml
   kubectl proxy
   kubectl proxy --help
   kubectl proxy --address=0.0.0.0 --port=8009
   kubectl proxy --address=0.0.0.0 --port=8009 --accept-hosts='^*$'
   openssl genrsa -out tls.key 2048
   openssl req -sha256 -new -x509 -days-key tls.key -out tls.crt
   kubectl proxy --address=0.0.0.0 --port=8009 --accept-hosts='^*$'
   kubectl get svc -n kube-system
   kubectl proxy --address=0.0.0.0 --port=8009 --accept-hosts='^*$'
   docker images
   kubectl apply -f https://raw.githubusercontent.com/kubernetes/dashboard/v2.2.0/aio/deploy/recommended.yaml
   kubectl get svc -n 
   kubectl get svc -n kubernetes-dashboard
   kubectl proxy --address=0.0.0.0 --port=8009 --accept-hosts='^*$'
   kubectl get pods --
   history|grep pods
   kubectl get pods --all-namespaces
   kubectl -n kubernetes-dashboard edit svn kubernetes-dashboard
   kubectl -n kubernetes-dashboard get svc
   kubectl -n kube-system get svc
   kubectl -n kubernetes-dashboard get svc
   kubectl -n kubernetes-dashboard edit svc kubernetes-dashboard
   kubectl -n kubernetes-dashboard
   kubectl -n kubernetes-dashboard get svc
   kubectl create serviceaccount dashboard =n kubernetes-dashboard
   kubectl create serviceaccount dashboard -n kubernetes-dashboard
   kubectl create rolebinding def-ns-admin --clusterrole=admin --serviceaccount=default:def-ns-admin
   kubectl create clusterrolebinding dashboard-cluster-admin -- clusterrole=cluster-admin --serviceaccount=kubernetes-dashboard:dashboard
   kubectl create clusterrolebinding dashboard-cluster-admin --clusterrole=cluster-admin --serviceaccount=kubernetes-dashboard:dashboard
   kubectl describe sa dashboard -n kubernetes-dashboard
   kubectl describe secret dashboard-token-vtncb -n kubernetes-dashboard
   kubectl describe secret dashboard-token-4vqkm -n kubernetes-dashboard
   kubectl get services nginx
   kubectl get services test
    kubectl -n default
   kubectl -n default get svc
   kubectl -n default edit svc test
   kubectl -n default get svc
   wget
   wget node1:8000
   wget node1:30000
   docker ps
   kubectl get ingress
   kubectl get ingress -n kube-system
   kubectl get ingress -n all-namespaces
   kubectl apply -f https://raw.githubusercontent.com/kubernetes/ingress-nginx/controller-v0.44.0/deploy/static/provider/cloud/deploy.yaml
   kubectl gett pods -n ingress-nginx
   kubectl get pods -n ingress-nginx
   kubectl get ingress
   kubectl describe ingress nginx-web
   kubectl get ingress nginx-web
   kubectl get pods --all-namespaces|grep nginx
   helm
   kubectl apply -f https://raw.githubusercontent.com/kubernetes/ingress-nginx/controller-v0.44.0/deploy/static/provider/aws/deploy.yaml
  kubectl get pods --all-namespaces|grep nginx
  kubectl apply -f https://raw.githubusercontent.com/kubernetes/ingress-nginx/controller-v0.44.0/deploy/static/provider/aws/deploy.yaml
  kubectl get p
  kubectl get pods -n ingress-nginx -o wide
  kubectl delete namespaces ingress-nginx
  wget https://raw.githubusercontent.com/kubernetes/ingress-nginx/controller-v0.44.0/deploy/static/provider/cloud/deploy.yaml
  ls
  vim deploy.yaml 
  kubectl apply -f deploy.yaml 
  kubectl get pods -n ingress-nginx -o wide
  kubectl get pods -n ingress-nginx -l app.kubernetes.io/name=ingress-nginx --watch
  kubectl get ingress
  kubectl get pods -n ingress-nginx -l app.kubernetes.io/name=ingress-nginx --watch
  kubectl get pods -n ingress-nginx -l 
  kubectl get pods -n ingress-nginx
  kubectl get pods -n ingress-nginx -o wide
  kubectl get namespace
  kubectl get node
  kubectl get pods
  kubectl get pods -o wide
  kubectl get deployment
  kubectl get deployments
  kubectl get pods -o wide
  kubectl get service -o wide
  kubectl get node
  kubectl get nodes
  kubectl get service -o wide
  kubectl get nodes
  kubectl get service -o wide
  kubectl get pods -o wide
  kubectl get service -o wide
  kubectl get pods -o wide
  kubectl get service -o wide
  history|grep dashboard
  kubectl apply -f https://raw.githubusercontent.com/kubernetes/dashboard/v2.2.0/aio/deploy/recommended.yaml
  kubectl get service -o wide
  kubectl get pods -o wide
  kubectl get pods --all-namespaces -o wide
  kubectl get service --all-namespaces -o wide
  kubectl get pods --all-namespaces -o wide
  kubectl get pods -n kubernetes-dashboard -o wide
  kubectl get service -n kubernetes-dashboard -o wide
  kubectl get pods -n kubernetes-dashboard -o wide
  kubectl get pods -n kubernetes-dashboard -o wide -w
  kubectl get service -n kubernetes-dashboard -o wide
  kubectl get pods -n kubernetes-dashboard -o wide -w
  ls
  wget https://github.com/kubesphere/ks-installer/releases/download/v3.0.0/kubesphere-installer.yaml
  kubectl apply -f kubesphere-installer.yaml 
  wget https://github.com/kubesphere/ks-installer/releases/download/v3.0.0/cluster-configuration.yaml
  ls
  vim cluster-configuration.yaml 
  kubectl apply -f cluster-configuration.yaml 
  kubectl get svc --all-namespaces
  docker pull kubesphere/ks-installer:v3.0.0
  kubectl apply -f cluster-configuration.yaml 
  kubectl apply -f kubesphere-installer.yaml 
  kubectl apply -f cluster-configuration.yaml 
  vim cluster-configuration.yaml 
  kubectl get svc/ks-console -n kubesphere-system
  kubectl get svc -n kubesphere-system
  kubectl apply -f cluster-configuration.yaml 
  kubectl get pod --all-namespaces
  kubectl get svc --all-namespaces
  kubectl apply -f kubesphere-installer.yaml 
  kubectl apply -f cluster-configuration.yaml 
  kubectl get svc --all-namespaces
  kubectl apply -f kubesphere-installer.yaml 
  kubectl apply -f cluster-configuration.yaml 
  kubectl -v
  kubectl -version
  kubectl --version
  kubectl
  kubectl version
  kubectl get node
  yum install -y kubectl-1.18.6 kubelet-1.18.6 kubeadm-1.18.6
  kubectl version
  history|grep adm
  kubeadm init --pod-network-cidr=10.244.0.0/16
  kubeadm reset
  kubeadm init --pod-network-cidr=10.244.0.0/16
  history|grep apply
  kubectl apply -f https://raw.githubusercontent.com/coreos/flannel/master/Documentation/kube-flannel.yml
  kubeadm get node
  kubectl get node
  kubectl apply -f kubesphere-installer.yaml 
  kubectl apply -f cluster-configuration.yaml 
  kubectl get svc --all-namespaces
  kubectl get node --all-namespaces
  kubectl get pod --all-namespaces
yhma大约 3 分钟K8S