Major upgrade using installer for CentOS

Supported in:

Google secops SOAR

This document explains how to perform a major upgrade for an existing Remote Agent using the installer for CentOs 7.9 or later.

This procedure involves installing and configuring prerequisite packages before executing the upgrade script.

For more information on how to install an agent on a new deployment, see Create an agent using installer on CentOS.

Note: To install all the packages, you must have superuser privileges. However, to ensure some dependencies remain accessible to non-root users, don't change the root user's umask from the default value of 0022.

Install and configure required packages to upgrade Remote Agents with version 2.0.0 and higher.

To install and configure required packages, follow these steps:

Run the following command to install Linux packages:
```
    yum install perl-core -y
```

Run the following commands separately to install OpenSSL 3.0.7:

    cd /usr/local/src
    wget https://www.openssl.org/source/openssl-3.0.7.tar.gz
    tar -xf openssl-3.0.7.tar.gz
    cd openssl-3.0.7
    ./config --prefix=/usr/local/ssl --openssldir=/usr/local/ssl shared zlib
    make -j$((`nproc`+1))
    make install

Run the following commands separately to configure OpenSSL environment variables:

    cd /etc/ld.so.conf.d/
    echo /usr/local/ssl/lib64 > openssl-3.0.7.conf
    ldconfig -v
    echo PATH="/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/local/ssl/bin" > /etc/environment
    source /etc/environment
    ln -sf  /usr/local/ssl/bin/openssl /usr/bin/openssl
    export LDFLAGS="$LDFLAGS -L/usr/local/ssl/lib64"
    export LD_LIBRARY_PATH=/usr/local/ssl/lib64

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