ToB企服应用市场:ToB评测及商务社交产业平台

标题: 使用 psycopg2 毗连高斯数据库报错 failed: none of the server‘s SASL au [打印本页]

作者: 梦见你的名字 时间: 2024-8-8 15:16
标题: 使用 psycopg2 毗连高斯数据库报错 failed: none of the server‘s SASL au

使用下令安装安装 psycopg2

pip3 install psycopg2

编写python文件 test2.py，毗连数据库。

  import psycopg2
  #创建毗连对象
  conn=psycopg2.connect(dbname="db_tpcc",user="tpcc_user",password="password",host="10.201.65.207",port=30100)
  cur=conn.cursor() #创建指针对象
  #创建毗连对象（SSl毗连）
  #conn = psycopg2.connect(dbname="db_tpcc", user="tpcc_user", password="password", host="10.201.65.207", port=30100,sslmode="verify-ca", sslcert="client.crt",sslkey="client.key.unsecure",sslrootcert="ca.pem")
  cur=conn.cursor() #创建指针对象
  # 创建表
  cur.execute("CREATE TABLE student(id integer,name varchar,sex varchar);")
  #插入数据
  cur.execute("INSERT INTO student(id,name,sex) VALUES(%s,%s,%s)",(1,'Aspirin','M'))
  cur.execute("INSERT INTO student(id,name,sex) VALUES(%s,%s,%s)",(2,'Taxol','F'))
  cur.execute("INSERT INTO student(id,name,sex) VALUES(%s,%s,%s)",(3,'Dixheral','M'))
  # 获取结果
  cur.execute('SELECT * FROM student')
  results=cur.fetchall()
  print (results)
  # 关闭毗连
  conn.commit()
  cur.close()
  conn.close()

运行test2.py 报错

conn = _connect(dsn, connection_factory=connection_factory, **kwasync)
psycopg2.OperationalError: connection to server at "10.201.65.207", port 30100 failed: none of the server's SASL authentication mechanisms are supported

大部分步伐猿采用如下方法办理

  A.实行下令修改加密参数 gs_guc reload -N all -I all -c "password_encryption_type=1";
  B.修改数据库每台机器的pg_hba.conf文件
  切换到你们那边的gaussdb用户，在所有DN节点都要修改如下内容
  cd /data/cluster/data/dn/dn_6001(目次改成你那边的）
  vi pg_hba.conf ，将下图标注的sha256改为md5

         C.改完重启数据库
  制止：gs_om -t stop
  启动：gs_om -t start

  D.修改了加密方式，以前创建的用户都不能登录，使用超级用户RsAdmin免密登录，使用下面的下令修改用户密码
  实行 alter user test_user3 identified by 'password'
  MD5这种加密方式，是不安全的加密方式，华为官方也不推荐.我们下面讨论，不修改高斯数据库加密方式的条件下处理题目

华为官网https://opengauss.org/zh/download/下载对应版本的Python-psycopg2_3.1.1，现在只支持LINUX系统，还不支持WINDOWS

下载后文件名如下openGauss-3.1.1-openEuler-aarch64-Python.tar.gz

将包上传到 LINUX 的任意目次下，这里为 /setup/openGauss,并解压

tar -zxvf openGauss-3.1.1-openEuler-aarch64-Python.tar.gz
解压后目次布局如下

将依赖的lib 文件复制到/usr/lib64

cp lib/* /usr/lib64
这里提示是否覆盖，全部选否

将psycopg2文件夹 copy 到 /usr/lib/python3.7/site-packages 并授权

假如不知道 site-packages的路径，使用下面的下令查找
find /usr -name *site-p*

         cp -r /setup/openGauss/psycopg2 /usr/lib/python3.7/site-packages/
  chmod -R 755 /usr/lib/python3.7/site-packages/psycopg2

拿step2编写的test2文件运行，运行成功

python3 test2.py

这里我们的毗连方式使用的是明文方式，绕过了 pip install psycopg2 的MD5 加密方式

conn=psycopg2.connect(dbname="db_tpcc",user="tpcc_user",password="password",host="10.201.65.207",port=30100)

为了更安全的网络毗连，我们应该使用证书的链接方式

注释掉明文链接，使用下面的毗连方式

conn = psycopg.connect(dbname="db_tpcc", user="tpcc_user", password="password", host="10.201.65.207", port=30100,sslmode="verify-ca", sslcert="client.crt",sslkey="client.key",sslrootcert="ca.pem")

登录高斯数据库服务器端，并编写 client 端生成脚本genCertificate_client.sh

  vim /setup/genCertificate_client.sh
脚本内容如下：
  curDir=/setup
  logFile=genCertificate.log
  user_pwd=password #这里配置为客户端运行python步伐的用户密码
  function genCertificate()
  {
echo "Start to genCertificate" >> ${logFile}
openssl=$(openssl version)
ca_dir=$(awk '/Where everything is kept/{print $3}' /etc/pki/tls/openssl.cnf)
if [ -z "${openssl}" -o -z "${ca_dir}" ]; then
echo "genCertificate failed: openssl is not installed" >> ${logFile}
exit 1
fi


mkdir -p ${curDir}/certificate
cd ${curDir}/certificate
if [ "${string:0:1}" == "." ]; then
ca_dir=${curDir}/certificate/${ca_dir}
fi
mkdir -p ${ca_dir}/newcerts
touch ${ca_dir}/index.txt
sed -i "s/^unique_subject =.*/unique_subject = no/" ${ca_dir}/index.txt.attr
echo '01' >> ${ca_dir}/serial

  # openssl genrsa -out ca.key 2048
  # expect <<-EOF
  # spawn openssl req -new -key ca.key -out ca.csr
  # expect "Country Name" {send "CN\r"}
  # expect "State or Province Name" {send "GD\r"}
  # expect "Locality Name" {send "SZ\r"}
  # expect "Organization Name" {send "HW\r"}
  # expect "Organizational Unit Name" {send "OM\r"}
  # expect "Common Name" {send "GAUSS\r"}
  # expect "Email Address" {send "\r"}
  # expect "A challenge password" {send "\r"}
  # expect "An optional company name" {send "\r"}
  # expect "]#" {send "\r"}
  #EOF
  # openssl x509 -req -days 3650 -in ca.csr -signkey ca.key -out ca.crt
expect <<-EOF
spawn clear
spawn openssl genrsa -des3 -out client.key 2048
expect "Enter pass phrase for client.key:"
send "${user_pwd}\r"
expect "Verifying - Enter pass phrase for client.key:"
send "${user_pwd}\r"
send "\r"
expect "]#" {send "\r"}
  EOF
expect <<-EOF
spawn openssl req -new -key client.key -out client.csr
expect "Enter pass phrase for client.key" {send "${user_pwd}\r"}
expect "Country Name" {send "CN\r"}
expect "State or Province Name" {send "GD\r"}
expect "Locality Name" {send "SZ\r"}
expect "Organization Name" {send "HW\r"}
expect "Organizational Unit Name" {send "OM\r"}
expect "Common Name" {send "GAUSS\r"}
expect "Email Address" {send "\r"}
expect "A challenge password" {send "\r"}
expect "An optional company name" {send "\r"}
expect "]#" {send "\r"}
  EOF
expect <<-EOF
spawn openssl ca -in client.csr -out client.crt -cert ca.crt -keyfile ca.key
expect "Sign the certificate" {send "y\r"}
expect "certificate requests certified" {send "y\r"}
expect "]#" {send "\r"}
  EOF
openssl x509 -in ca.crt -out ca.pem
if [ ! -s ${curDir}/certificate/ca.pem -o ! -s ${curDir}/certificate/client.crt -o ! -s ${curDir}/certificate/client.key ]; then
echo "genCertificate failed, please execute \"sh ${curDir}/install_cluster.sh genCertificate\" cmd for details" >> ${logFile}
exit 1
fi

echo "genCertificate finished, begin to deliver it to all nodes" >> ${logFile}
cat client.crt > client.pem

shift
while [ $# != 0 ]; do
echo "Start to deliver cert to $1" >> ${logFile}
scpCmd="scp -q ${curDir}/certificate/ca.pem ${curDir}/certificate/client.key ${curDir}/certificate/client.pem root@$1:/home/${user}/sslcrt"
executeRemoteCmd "${scpCmd}" ${root_pwd}
sshCmd="ssh -t root@$1 \"chown -R ${user}

{user_group} /home/${user}/sslcrt\""
executeRemoteCmd "${sshCmd}" ${root_pwd}
shift
done

echo "End to genCertificate" >> ${logFile}
  }

  genCertificate

赋予脚本实行权限，并copy 高斯安装目次下的certificate目次到setup目次下

chmod +x /setup/genCertificate_client.sh
cp -r /data/GaussDBInstaller/certificate /setup/

运行脚本genCertificate_client.sh

./genCertificate_client.sh

从python步伐的客户端运行 scp 下令，copy 文件到 test2.py的目次下

scp 10.201.65.207:/setup/certificate/ca.pem /setup/
scp 10.201.65.207:/setup/certificate/client.key /setup/
scp 10.201.65.207:/setup/certificate/client.crt /setup/

运行 test2.py

  提示输入Enter PEM pass phrase，这里为我们 step11 中配置的客户端用户密码。
  输入密码后 test2.py运行成功

在真实应用中我们不可能每次输入密码，修改 client key 为不需要每次输入密码

openssl rsa -in client.key -out client.key.unsecure

修改步伐毗连，并运行test2.py,不需要输入密码，python步伐运行成功

修改毗连为

conn = psycopg2.connect(dbname="db_tpcc", user="tpcc_user", password="password", host="10.201.65.207", port=30100,sslmode="verify-ca", sslcert="client.crt",sslkey="client.key.unsecure",sslrootcert="ca.pem")

python3 test2.py

免责声明：如果侵犯了您的权益，请联系站长，我们会及时删除侵权内容，谢谢合作！更多信息从访问主页：qidao123.com:ToB企服之家，中国第一个企服评测及商务社交产业平台。

欢迎光临 ToB企服应用市场:ToB评测及商务社交产业平台 (https://dis.qidao123.com/)