How to solve the timeout during pip operation in Linux

How to solve the timeout problem when pip is used in Linux instances

pip is one of the most popular Python package management tools. Many Alibaba Cloud users use pip to update system sources. Alibaba Cloud's pip source addresses are as follows:

(Default) Public network: mirrors.aliyun.com

Private network VPC intranet: mirrors.cloud.aliyuncs.com

Classic network intranet: mirrors.aliyuncs.com

Description of the phenomenon

Pip requests for Linux instances occasionally time out or fail. Currently, the affected public images are:

CentOS

Debian

Ubuntu

SUSE

OpenSUSE

Aliyun Linux

Cause Analysis

The default access address for pip requests is mirrors.aliyun.com, and the instance accessing this address must be able to access the public network. When your instance is not assigned a public IP, a pip request timeout failure may occur.

Workaround

You can use any of the following methods to resolve the issue.

Method 1

Assign a public IP address to your instance, that is, bind an elastic public IP address (EIP) to the instance. Prepaid instances can also reallocate public IP addresses through upgrading or downgrading.

Method 2

If there is a delay in pip response, you can run the script fix_pypi.sh in the ECS instance and then retry the pip operation.

Remote connection instance.

Run wget http://image-offline.oss-cn-hangzhou.aliyuncs.com/fix/fix_pypi.sh to obtain the file.

Run the script:

VPC instance: Run bash fix_pypi.sh "mirrors.cloud.aliyuncs.com".

Classic network instance: Run bash fix_pypi.sh "mirrors.aliyuncs.com".

Retry the pip operation.

The following is the script content of fix_pypi.sh:

#!/bin/bash
function config_pip() {
  pypi_source=$1
  if [[ ! -f ~/.pydistutils.cfg ]]; then
cat > ~/.pydistutils.cfg << EOF
[easy_install]
index-url=http://$pypi_source/pypi/simple/
EOF
  else
    sed -i "s#index-url.*#index-url=http://$pypi_source/pypi/simple/#" ~/.pydistutils.cfg
  fi
  if [[ ! -f ~/.pip/pip.conf ]]; then
  mkdir -p ~/.pip
cat > ~/.pip/pip.conf << EOF
[global]
index-url=http://$pypi_source/pypi/simple/
[install]
trusted-host=$pypi_source
EOF
  else
    sed -i "s#index-url.*#index-url=http://$pypi_source/pypi/simple/#" ~/.pip/pip.conf
    sed -i "s#trusted-host.*#trusted-host=$pypi_source#" ~/.pip/pip.conf
  fi
}
config_pip $1

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