Merge pull request #53 from petr-balogh/master

Allow install docker also on RHEL OS

tasks/install.yml

@@ -22,22 +22,22 @@
 - block:
     - name: add GPG key
       apt_key:
-        url: "https://download.docker.com/linux/{{ ansible_distribution | lower }}/gpg"
+        url: "https://download.docker.com/linux/{{ docker_repo_distribution }}/gpg"
         state: present
 
     - name: add docker repository | Debian
       apt_repository:
-        repo: "deb [arch=amd64] https://download.docker.com/linux/{{ ansible_distribution | lower }} {{ ansible_distribution_release }} stable"
+        repo: "deb [arch=amd64] https://download.docker.com/linux/{{ docker_repo_distribution }} {{ ansible_distribution_release }} stable"
         state: present
   when: ansible_os_family == "Debian"
 
 - name: add docker repository | RedHat
   yum_repository:
     name: docker-ce-stable
     description: "Docker CE Stable - $basearch"
-    baseurl: "https://download.docker.com/linux/{{ ansible_distribution | lower }}/$releasever/$basearch/stable"
+    baseurl: "https://download.docker.com/linux/{{ docker_repo_distribution }}/{{ ansible_distribution_major_version }}/$basearch/stable"
     gpgcheck: true
-    gpgkey: "https://download.docker.com/linux/{{ ansible_distribution | lower }}/gpg"
+    gpgkey: "https://download.docker.com/linux/{{ docker_repo_distribution }}/gpg"
   when: ansible_os_family == "RedHat" and ansible_distribution != "OracleLinux"
 
 - name: Install docker

vars/main.yml

@@ -1,3 +1,4 @@
 ---
 docker_gpg_key: 58118E89F3A912897C070ADBF76221572C52609D
 key_server: hkp://p80.pool.sks-keyservers.net:80
+docker_repo_distribution: "{{ ansible_distribution | lower }}"

vars/redhat.yml

@@ -1,4 +1,6 @@
 ---
+# allows also install on RHEL with CentOS repos.
+docker_repo_distribution: "{{ (ansible_distribution == 'RedHat')| ternary('centos', ansible_distribution) | lower }}"
 docker_package: "docker-ce{{ (docker_version != 'latest') | ternary('-' ~ docker_version ~ '*', '') }}"
 docker_dependencies:
   - ca-certificates