playbooks: added configure docker network playbook first version

per default docker uses IP 172.17.0.0/16 which conflicts with the
test network at NetModule. Hence, we reconfigure it to
192.168.5.1/24

Signed-off-by: Marc Mattmüller <marc.mattmueller@netmodule.com>

playbooks/getting_started/configure-docker-net.yml

@@ -0,0 +1,36 @@
+- name: Configure Docker Network Adapter
+  hosts: linux
+  gather_facts: false
+  become: yes
+  tasks:
+    - name: Bring docker network down and remove routes
+      ansible.builtin.shell: |
+        systemctl stop docker
+        systemctl stop docker.socket
+        iptables -t nat -F POSTROUTING
+        ip link set dev docker0 down
+        ip addr del <ip addr of docker0>/<netmaks> dev docker0
+      become: yes
+    - name: Configure docker network
+      ansible.builtin.shell: |
+        echo "{ \"bip\": \"192.168.5.1/24\" }" > /etc/docker/daemon.json
+        ip addr add 192.168.5.1/24 dev docker0
+        ip link set dev docker0 up
+      become: yes
+    - name: Verify docker IP address
+      register: verifyIp
+      ansible.builtin.shell: |
+        ip addr show docker0
+    - name: Display IP verification output
+      debug:
+        msg: "{{verifyIp.stdout_lines}}"
+    - name: Bring docker up again
+      register: bringUp
+      ansible.builtin.shell: |
+        systemctl start docker
+        iptables -t nat -L -n
+        ip route
+      become: yes
+    - name: Display Bring-up output
+      debug:
+        msg: "{{bringUp.stdout_lines}}"