feat(os): enable RHEL support

this change enables T-Pot deployment on red hat enterprise linux. a number of hacks
had to be implemented due to RHEL's somewhat opinionated package
management mechanisms.

we also add a new section to the README which explains the caveats inherent in using RHEL.

NOTE: this change only support RHEL >= 8 due to packaging issues. it omits `grc` which depends on python2 and doesn't build on RHEL >= 7.

README.md

@@ -386,7 +386,7 @@ To get things up and running just follow these steps:
 
 Red Hat Enterprise Linux (RHEL) is a somewhat unique case in that:
 
-1. Connections to Red Hat repositories depend on a Red Hat subscription. You will not be able to update the OS or install new packages if the targeted machine is not subscribed. **If your server is not attached to a Red Hat subscription, installation will fail!** 
+1. Connections to Red Hat repositories depend on a Red Hat subscription. You will not be able to update the OS or install new packages if the targeted machine is not subscribed. **If your server is not attached to a Red Hat subscription, installation will fail! 
 2. Ansible is installed from a RHEL-specific repository by the installer. Do not attempt to install it from the upstream repositories. 
 3. Docker is installed from EPEL, which is installed by the installer script. Do not attempt to install it from the community installer script.
 2. T-Pot will only install successfully on RHEL >= 8. One of the convenience dependencies (`grc`) depends on Python 2, which was removed after RHEL 7. It is omitted from the RHEL installation of T-Pot.

install.sh

@@ -197,7 +197,7 @@ case ${myCURRENT_DISTRIBUTION} in
     echo
     echo ${myINSTALL_NOTIFICATION}
     echo
-    sudo dnf -y --refresh install ${myPACKAGES_ROCKY}
+    sudo dnf -y --refresh install ${myPACKAGES_ROCKY_RHEL}
     ansible-galaxy collection install ansible.posix
     ;;
   "Red Hat Enterprise Linux")

installer/install/tpot.yml

@@ -759,25 +759,24 @@
       when: ansible_distribution in ["AlmaLinux", "Debian", "Fedora", "openSUSE Tumbleweed", "Raspbian", "RedHat", "Rocky", "Ubuntu"]
       failed_when: ansible_user_id == "root"
 
-    - name: Add aliases
+    - name: Add aliases (All except RHEL)
       blockinfile:
         path: ~/.bashrc
         block: |
-          alias dps='{{ "grc --colour=on " if ansible_distribution != "RedHat" else "" }}docker ps -f status=running -f status=exited --format "table {{'{{'}}.Names{{'}}'}}\\t{{'{{'}}.Status{{'}}'}}\\t{{'{{'}}.Ports{{'}}'}}" | sort'
+          alias dps='grc --colour=on docker ps -f status=running -f status=exited --format "table {{'{{'}}.Names{{'}}'}}\\t{{'{{'}}.Status{{'}}'}}\\t{{'{{'}}.Ports{{'}}'}}" | sort'
           alias dpsw='watch -c bash -ic dps'
           alias mi='micro'
           alias sudo='sudo '
         marker: "# {mark} ANSIBLE MANAGED BLOCK"
         insertafter: EOF
         state: present
-      when: ansible_distribution in ["AlmaLinux", "Debian", "Fedora", "openSUSE Tumbleweed", "Raspbian", "RedHat", "Rocky", "Ubuntu"]
+      when: ansible_distribution in ["AlmaLinux", "Debian", "Fedora", "openSUSE Tumbleweed", "Raspbian", "Rocky", "Ubuntu"]
       tags:
         - "AlmaLinux"
         - "Debian"
         - "Fedora"
         - "openSUSE Tumbleweed"
         - "Raspbian"
-        - "RedHat"
         - "Rocky"
         - "Ubuntu"
 

installer/remove/tpot.yml

@@ -179,7 +179,7 @@
         target: DROP
         permanent: yes
         state: enabled
-      when: ansible_distribution in ["AlmaLinux", "Fedora", "openSUSE Tumbleweed", "RedHat", "Rocky"]
+      when: ansible_distribution in ["AlmaLinux", "Fedora", "openSUSE Tumbleweed", "Rocky"]
       tags:
         - "AlmaLinux"
         - "Fedora"

uninstall.sh

@@ -65,7 +65,6 @@ if [[ "${myANSIBLE_DISTRIBUTIONS[@]}" =~ "${myCURRENT_DISTRIBUTION}" ]];
     fi
   else
     myANSIBLE_TAG=${myCURRENT_DISTRIBUTION}
-  fi
 
 # Check type of sudo access
 if myANSIBLE_TAG="Debian";