When installing fabric with pip, i get following error

root@ip-172-31-32-52:~# pip install fabric
Collecting fabric
  Downloading Fabric-1.13.2-py2-none-any.whl (92kB)
---->SNIP<----
  creating build/temp.linux-x86_64-2.7/build/temp.linux-x86_64-2.7
  x86_64-linux-gnu-gcc -pthread -DNDEBUG -g -fwrapv -O2 -Wall -Wstrict-prototypes -fno-strict-aliasing -Wdate-time -D_FORTIFY_SOURCE=2 -g -fstack-protector-strong -Wformat -Werror=format-security -fPIC -I/usr/include/python2.7 -c build/temp.linux-x86_64-2.7/_openssl.c -o build/temp.linux-x86_64-2.7/build/temp.linux-x86_64-2.7/_openssl.o
  build/temp.linux-x86_64-2.7/_openssl.c:434:30: fatal error: openssl/opensslv.h: No such file or directory
  compilation terminated.
  error: command 'x86_64-linux-gnu-gcc' failed with exit status 1
  
  ----------------------------------------
  Failed building wheel for cryptography
  Running setup.py clean for cryptography
Failed to build cryptography

The error is related to

build/temp.linux-x86_64-2.7/_openssl.c:434:30: fatal error: openssl/opensslv.h: No such file or directory

This is fixed by installing libssl-dev on Ubuntu

apt install libssl-dev

On RedHat/CentOS, you need to install

yum install openssl-devel