1）禁用systemd-resolved服务

systemctl stop systemd-resolved
systemctl disable systemd-resolved

2）默认的/etc/resolv.conf是软链接，删除重建为普通文件。

rm -rf /etc/resolv.conf

3）vim /etc/resolv.conf

nameserver 10.1.1.1
nameserver 10.1.2.1

4）将/etc/resolv.conf文件加锁

chattr +i /etc/resolv.conf

sudo dnf update
sudo dnf install python3.11
sudo dnf install python3.11-pip

编译安装
sudo dnf update
sudo dnf groupinstall "Development Tools" -y
sudo dnf install openssl-devel bzip2-devel libffi-devel -y
cd Python-3.11.0
./configure --enable-optimizations
make -j $(nproc)
sudo make altinstall

sudo add-apt-repository ppa:deadsnakes/ppa
sudo apt-get update
sudo apt-get install python3.10
python3.10 --version

安装pip
apt install python3-pip

将Python 3.10设置为默认的Python 3版本
sudo update-alternatives --install /usr/bin/python3 python3 /usr/bin/python3.10 1
sudo update-alternatives --config python3

编译安装
sudo apt install wget build-essential checkinstall
sudo apt install -y build-essential zlib1g-dev libncurses5-dev libgdbm-dev libnss3-dev libssl-dev libreadline-dev libffi-dev curl libbz2-dev
cd Python-3.10.0
sudo ./configure --enable-optimizations
sudo make -j $(nproc)
sudo make altinstall

创建软链接
sudo ln -s /usr/local/bin/python3.10 /usr/bin/python3

配置 pip3
sudo ln -s /usr/local/bin/pip3.10 /usr/bin/pip3

ETCD数据目录

ETCD_DATA_DIR="/var/lib/etcd/data"

备份ETCD数据

1）使用cp命令进行备份

cp -R /var/lib/etcd/ /opt/backup/etcd/

2）创建ETCD快照备份

etcdctl snapshot save /opt/snapshot.db

恢复etcd快照文件

1）停止etcd服务

systemctl stop etcd

2）恢复数据

实例1恢复

etcdctl snapshot restore /opt/snapshot.db \
--name etcd1 \
--initial-cluster etcd1=http://etcd1:2380,etcd2=http://etcd2:2380,etcd3=http://etcd3:2380 \
--initial-cluster-token mro \
--initial-advertise-peer-urls http://etcd1:2380 \
--data-dir /var/lib/etcd/data

实例2恢复

etcdctl snapshot restore /opt/snapshot.db \
--name etcd2 \
--initial-cluster etcd1=http://etcd1:2380,etcd2=http://etcd2:2380,etcd3=http://etcd3:2380 \
--initial-cluster-token mro \
--initial-advertise-peer-urls http://etcd2:2380 \
--data-dir /var/lib/etcd/data

实例3恢复

etcdctl snapshot restore /opt/snapshot.db \
--name etcd3 \
--initial-cluster etcd1=http://etcd1:2380,etcd2=http://etcd2:2380,etcd3=http://etcd3:2380 \
--initial-cluster-token mro \
--initial-advertise-peer-urls http://etcd3:2380 \
--data-dir /var/lib/etcd/data

3）启动服务

systemctl daemon-reload
systemctl start etcd

4）查看集群

etcdctl --endpoints="http://etcd1:2379,http://etcd2:2379,http://etcd3:2379" endpoint status --write-out=table

local redis = require "resty.redis"


local function close_redis(red)
    if not red then
        return
    end

    local pool_max_idle_time = 60000
    local pool_size = 10
    local ok, err = red:set_keepalive(pool_max_idle_time, pool_size)
    if not ok then
        ngx_log(ngx_err, "set redis keepalive error: ", err)
    end
end


local red = redis:new()
red:set_timeout(1000)
local ok, err = red:connect(redis_host, redis_port)
if not ok then
    ngx_log(ngx_err, "connect to redis server error: ", err)
    return
end

local count, err = red:get_reused_times()
if count == 0 then
    local ok, err = red:auth(redis_pass)
    if not ok then
        ngx_log(ngx_err, "redis password error: ", err)
        return
    end
elseif err then
    ngx_log(ngx_err, "get redis reused_times error: ", err)
    return
else
    ngx_log(ngx_info, "get_reused_times: ", count)
end

red:mget()
red:mget(unpack({key1, key2}))
red:set()
red:del()
red:smembers()

close_redis(red)