4 files changed, 91 insertions, 0 deletions

diff --git a/roles/etcd_common/defaults/main.yml b/roles/etcd_common/defaults/main.yml
index 14e712fcf..8cc7a9c20 100644
--- a/roles/etcd_common/defaults/main.yml
+++ b/roles/etcd_common/defaults/main.yml
@@ -1,8 +1,18 @@
 ---
+# Default action when calling this role
+r_etcd_common_action: noop
+r_etcd_common_backup_tag: ''
+r_etcd_common_backup_sufix_name: ''
+
 # runc, docker, host
 r_etcd_common_etcd_runtime: "docker"
 r_etcd_common_embedded_etcd: false
 
+# etcd run on a host => use etcdctl command directly
+# etcd run as a docker container => use docker exec
+# etcd run as a runc container => use runc exec
+r_etcd_common_etcdctl_command: "{{ 'etcdctl' if r_etcd_common_etcd_runtime == 'host' or r_etcd_common_embedded_etcd | bool else 'docker exec etcd_container etcdctl' if r_etcd_common_etcd_runtime == 'docker' else 'runc exec etcd etcdctl' }}"
+
 # etcd server vars
 etcd_conf_dir: '/etc/etcd'
 r_etcd_common_system_container_host_dir: /var/lib/etcd/etcd.etcd
diff --git a/roles/etcd_common/tasks/backup.yml b/roles/etcd_common/tasks/backup.yml
new file mode 100644
index 000000000..4a4832275
--- /dev/null
+++ b/roles/etcd_common/tasks/backup.yml
@@ -0,0 +1,72 @@
+---
+- set_fact:
+    l_etcd_backup_dir: "{{ etcd_data_dir }}/openshift-backup-{{ r_etcd_common_backup_tag }}{{ r_etcd_common_backup_sufix_name }}"
+
+# TODO: replace shell module with command and update later checks
+- name: Check available disk space for etcd backup
+  shell: df --output=avail -k {{ etcd_data_dir }} | tail -n 1
+  register: l_avail_disk
+  # AUDIT:changed_when: `false` because we are only inspecting
+  # state, not manipulating anything
+  changed_when: false
+
+# TODO: replace shell module with command and update later checks
+- name: Check current etcd disk usage
+  shell: du --exclude='*openshift-backup*' -k {{ etcd_data_dir }} | tail -n 1 | cut -f1
+  register: l_etcd_disk_usage
+  when: r_etcd_common_embedded_etcd | bool
+  # AUDIT:changed_when: `false` because we are only inspecting
+  # state, not manipulating anything
+  changed_when: false
+
+- name: Abort if insufficient disk space for etcd backup
+  fail:
+    msg: >
+      {{ l_etcd_disk_usage.stdout }} Kb disk space required for etcd backup,
+      {{ l_avail_disk.stdout }} Kb available.
+  when: (r_etcd_common_embedded_etcd | bool) and (l_etcd_disk_usage.stdout|int > l_avail_disk.stdout|int)
+
+# For non containerized and non embedded we should have the correct version of
+# etcd installed already. So don't do anything.
+#
+# For containerized installs we now exec into etcd_container
+#
+# For embedded non containerized we need to ensure we have the latest version
+# etcd on the host.
+- name: Detecting Atomic Host Operating System
+  stat:
+    path: /run/ostree-booted
+  register: l_ostree_booted
+
+- name: Install latest etcd for embedded
+  package:
+    name: etcd
+    state: latest
+  when:
+  - r_etcd_common_embedded_etcd | bool
+  - not l_ostree_booted.stat.exists | bool
+
+- name: Generate etcd backup
+  command: >
+    {{ r_etcd_common_etcdctl_command }} backup --data-dir={{ etcd_data_dir }}
+    --backup-dir={{ l_etcd_backup_dir }}
+
+# According to the docs change you can simply copy snap/db
+# https://github.com/openshift/openshift-docs/commit/b38042de02d9780842dce95cfa0ef45d53b58bc6
+- name: Check for v3 data store
+  stat:
+    path: "{{ etcd_data_dir }}/member/snap/db"
+  register: l_v3_db
+
+- name: Copy etcd v3 data store
+  command: >
+    cp -a {{ etcd_data_dir }}/member/snap/db
+    {{ l_etcd_backup_dir }}/member/snap/
+  when: l_v3_db.stat.exists
+
+- set_fact:
+    r_etcd_common_backup_complete: True
+
+- name: Display location of etcd backup
+  debug:
+    msg: "Etcd backup created in {{ l_etcd_backup_dir }}"
diff --git a/roles/etcd_common/tasks/etcdctl.yml b/roles/etcd_common/tasks/drop_etcdctl.yml
index 6cb456677..6cb456677 100644
--- a/roles/etcd_common/tasks/etcdctl.yml
+++ b/roles/etcd_common/tasks/drop_etcdctl.yml
diff --git a/roles/etcd_common/tasks/main.yml b/roles/etcd_common/tasks/main.yml
new file mode 100644
index 000000000..6ed87e6c7
--- /dev/null
+++ b/roles/etcd_common/tasks/main.yml
@@ -0,0 +1,9 @@
+---
+- name: Fail if invalid r_etcd_common_action provided
+  fail:
+    msg: "etcd_common role can only be called with 'noop' or 'backup' or 'drop_etcdctl'"
+  when: r_etcd_common_action not in ['noop', 'backup', 'drop_etcdctl']
+
+- name: Include main action task file
+  include: "{{ r_etcd_common_action }}.yml"
+  when: r_etcd_common_action != "noop"