Use yum command direct

.ansible-lint

@@ -1,3 +1,5 @@
 # .ansible-lint                                                                                                                                                                                                          │
-warn_list:  # or 'skip_list' to silence them completely                                                                                                                                                                  │
-  - '106'  # Role name {} does not match ``^[a-z][a-z0-9_]+$`` pattern     
+warn_list: []  # or 'skip_list' to silence them completely  
+skip_list:
+  - '403' 
+  - '106'

Centos7-Dockerfile

@@ -1,2 +1,3 @@
 FROM docker.io/pycontribs/centos:7
-RUN yum install -y iproute
+RUN yum install -y iproute firewalld python-firewall net-tools && \
+    systemctl enable firewalld

Centos8-Dockerfile

@@ -0,0 +1,7 @@
+# Centos8-Dockerfile
+FROM docker.io/pycontribs/centos:8
+RUN yum install -y iproute firewalld net-tools && \
+    sed -i 's/FirewallBackend=nftables/FirewallBackend=iptables/' /etc/firewalld/firewalld.conf && \
+    sed -i 's/IPv6_rpfilter=yes/IPv6_rpfilter=no/' /etc/firewalld/firewalld.conf && \
+    systemctl enable firewalld
+

defaults/main.yml

@@ -3,13 +3,22 @@ cmk_add_host: false # Should be true/false whether we should automatically add h
 cmk_omd_protocol: http # Should be http or https
 cmk_omd_host: your-checkmk-hostname
 cmk_omd_site: your-checkmk-site # e.g the first piece after the / following your hostname
+
 # If you have created a folder in WATO already you want hosts to be put in when registered
 # uncomment cmk_folder below and specify the folder to use.  Otherwise the role creates and 
 # adds new hosts by default to Unsorted folder
 # cmk_folder: your_folder_in_WATO
+
+# Copy paste the link address for rpm agent from CheckMK
 cmk_rpm_agent: http://url-from-your-agent-bakery-in-checkmk.rpm
+# Copy paste the link address for MSI (Windows) agent from CheckMK
 cmk_msi_agent: http://url-from-your-agent-bakery-in-checkmk.msi
 
+# Check_MK GPG Key
+# Copy paste the link address from Signature Keys for Signing Agents page
+cmk_gpg_key_id: 1
+cmk_gpg_key_url: "{{ cmk_omd_protocol }}://{{ cmk_omd_host }}/{{ cmk_omd_site }}/check_mk/wato.py?key={{ cmk_gpg_key_id }}&mode=download_signature_key"
+
 
 # Should be username of an automation user in checkmk
 cmk_username: some-username
@@ -18,6 +27,7 @@ cmk_username: some-username
 # I recommend encrypting this with ansible-vault. 
 # Example: ansible-vault encrypt_string somesecret_string --name cmk_secret
 cmk_secret: some-secret
+
 # Combined string required for unattended actions
 cmk_auth: "&_username={{ cmk_username }}&_secret={{ cmk_secret }}"
 

handlers/main.yml

@@ -8,4 +8,16 @@
 
 - name: cmk fresh install
   set_fact:
-    cmk_fresh_install: True
+    cmk_fresh_install: True
+
+- name: ensure firewall open
+  firewalld:
+    port: 6556/tcp
+    state: enabled
+    permanent: yes
+    immediate: yes
+
+- name: remove agent
+  file:
+    path: /tmp/check-mk-agent.rpm
+    state: absent

molecule/default/molecule.yml

@@ -5,20 +5,21 @@ driver:
   name: docker
 platforms:
   - name: rhel8
-    image: docker.io/pycontribs/centos:8
+    image: guisea/centos8-ansible:latest
+    # dockerfile: Centos8-Dockerfile
     privileged: True
     volume_mounts:
       - "/sys/fs/cgroup:/sys/fs/cgroup:rw"
     command: "/usr/sbin/init"
     pre_build_image: true
   - name: rhel7
-    image: docker.io/pycontribs/centos:7
-    dockerfile: Centos7-Dockerfile
+    image: guisea/centos7-ansible:latest
+    # dockerfile: Centos7-Dockerfile
     privileged: True
     volume_mounts:
       - "/sys/fs/cgroup:/sys/fs/cgroup:rw"
     command: "/usr/sbin/init"
-    pre_build_image: false
+    pre_build_image: true
 provisioner:
   name: ansible
 verifier:
@@ -27,4 +28,4 @@ lint: |
   set -e
   yamllint .
   ansible-lint
-  flake8
+  flake8

tasks/RedHat-register.yml

@@ -1,5 +1,32 @@
-- name: Register with CheckMK Update Server
-  shell: |
-    cmk-update-agent register -H $(hostname -s) --user {{ cmk_username }} \
-    --secret {{ cmk_secret }}
-  changed_when: false
+- block:
+    - name: Register with CheckMK Update Server
+      shell: |
+        cmk-update-agent register -H $(hostname -s) --user {{ cmk_username }} \
+        --secret {{ cmk_secret }}
+      changed_when: false
+      notify: remove agent
+  rescue:
+    - name: Gather facts of packages
+      package_facts:
+        manager: "auto"
+
+    - name: Ensure check_mk_agent installed (again)
+      command: /usr/bin/yum install --nogpgcheck -y /tmp/check-mk-agent.rpm
+      args:
+        warn: no
+      notify:
+        - restart xinetd
+        - ensure firewall open
+      when: "'check-mk-agent' not in ansible_facts.packages"
+
+    - name: Gather facts of packages (again)
+      package_facts:
+        manager: "auto"
+
+    - name: Register with CheckMK Update Server (retry)
+      shell: |
+        cmk-update-agent register -H $(hostname -s) --user {{ cmk_username }} \
+        --secret {{ cmk_secret }}
+      changed_when: false
+      when: "'check-mk-agent' in ansible_facts.packages"
+      notify: remove agent

tasks/RedHat.yml

@@ -1,9 +1,9 @@
 ---
 # Tasks for installation on RedHat Family
 - name: Ensure xinetd installed
-  yum:
+  package:
     name: xinetd
-    state: installed
+    state: present
   notify: restart xinetd
 
 - name: Gather facts of packages
@@ -18,17 +18,13 @@
         dest: /tmp/check-mk-agent.rpm
 
     - name: Ensure check_mk_agent installed
-      yum:
-        name: /tmp/check-mk-agent.rpm
-        state: installed
+      command: /usr/bin/yum install --nogpgcheck -y /tmp/check-mk-agent.rpm
+      args:
+        warn: no
       notify:
         - restart xinetd
         - cmk fresh install
-
-    - name: Remove agent Download
-      file:
-        path: /tmp/check-mk-agent.rpm
-        state: absent
+        - ensure firewall open
   when: "'check-mk-agent' not in ansible_facts.packages or cmk_force_install"
   tags:
     - check_mk_agent