Implement container_runtime playbooks and changes

This commit refactors some duplicate code, removes
usage of set_fact where not needed, and reorganizes
container_runtime role to use include_role.

1 files changed, 27 insertions, 0 deletions

diff --git a/roles/container_runtime/tasks/docker_sanity.yml b/roles/container_runtime/tasks/docker_sanity.yml
new file mode 100644
index 000000000..e62cf5505
--- /dev/null
+++ b/roles/container_runtime/tasks/docker_sanity.yml
@@ -0,0 +1,27 @@
+---
+# Sanity checks to ensure the role will complete and provide helpful error
+# messages for common problems.
+
+- name: Error out if Docker pre-installed but too old
+  fail:
+    msg: "Docker {{ curr_docker_version.stdout }} is installed, but >= 1.9.1 is required."
+  when: not curr_docker_version | skipped and curr_docker_version.stdout != '' and curr_docker_version.stdout | version_compare('1.9.1', '<') and not docker_version is defined
+
+- name: Error out if requested Docker is too old
+  fail:
+    msg: "Docker {{ docker_version }} requested, but >= 1.9.1 is required."
+  when: docker_version is defined and docker_version | version_compare('1.9.1', '<')
+
+# If a docker_version was requested, sanity check that we can install or upgrade to it, and
+# no downgrade is required.
+- name: Fail if Docker version requested but downgrade is required
+  fail:
+    msg: "Docker {{ curr_docker_version.stdout }} is installed, but version {{ docker_version }} was requested."
+  when: not curr_docker_version | skipped and curr_docker_version.stdout != '' and docker_version is defined and curr_docker_version.stdout | version_compare(docker_version, '>')
+
+# This involves an extremely slow migration process, users should instead run the
+# Docker 1.10 upgrade playbook to accomplish this.
+- name: Error out if attempting to upgrade Docker across the 1.10 boundary
+  fail:
+    msg: "Cannot upgrade Docker to >= 1.10, please upgrade or remove Docker manually, or use the Docker upgrade playbook if OpenShift is already installed."
+  when: not curr_docker_version | skipped and curr_docker_version.stdout != '' and curr_docker_version.stdout | version_compare('1.10', '<') and docker_version is defined and docker_version | version_compare('1.10', '>=')