Make etcd data dir configurable.

Closes: #1073
Signed-off-by: Sergii Golovatiuk <sgolovatiuk@mirantis.com>

inventory/group_vars/k8s-cluster.yml

 # Valid bootstrap options (required): ubuntu, coreos, centos, none
 bootstrap_os: none
 
+#Directory where etcd data stored
+etcd_data_dir: /var/lib/etcd
+
 # Directory where the binaries will be installed
 bin_dir: /usr/local/bin
 

roles/adduser/defaults/main.yml

 ---
 kube_cert_group: kube-cert
+etcd_data_dir: "/var/lib/etcd"
 
 addusers:
   etcd:
     name: etcd
     comment: "Etcd user"
     createhome: yes
-    home: "/var/lib/etcd"
+    home: "{{ etcd_data_dir }}"
     system: yes
     shell: /bin/nologin
   kube:

roles/adduser/vars/debian.yml

@@ -3,7 +3,7 @@ addusers:
   - name: etcd
     comment: "Etcd user"
     createhome: yes
-    home: "/var/lib/etcd"
+    home: "{{ etcd_data_dir }}"
     system: yes
     shell: /bin/nologin
 

roles/adduser/vars/redhat.yml

@@ -3,7 +3,7 @@ addusers:
   - name: etcd
     comment: "Etcd user"
     createhome: yes
-    home: "/var/lib/etcd"
+    home: "{{ etcd_data_dir }}"
     system: yes
     shell: /bin/nologin
 

roles/etcd/defaults/main.yml

 ---
 etcd_bin_dir: "{{ local_release_dir }}/etcd/etcd-{{ etcd_version }}-linux-amd64/"
+etcd_data_dir: "/var/lib/etcd"
 
 etcd_config_dir: /etc/ssl/etcd
 etcd_cert_dir: "{{ etcd_config_dir }}/ssl"

roles/etcd/templates/etcd-docker.service.j2

@@ -13,7 +13,7 @@ ExecStart={{ docker_bin_dir }}/docker run --restart=on-failure:5 \
 --net=host \
 -v /etc/ssl/certs:/etc/ssl/certs:ro \
 -v {{ etcd_cert_dir }}:{{ etcd_cert_dir }}:ro \
--v /var/lib/etcd:/var/lib/etcd:rw \
+-v {{ etcd_data_dir }}:/var/lib/etcd:rw \
 {% if etcd_memory_limit is defined %}
 --memory={{ etcd_memory_limit|regex_replace('Mi', 'M') }} \
 {% endif %}

roles/etcd/templates/etcd-rkt.service.j2

@@ -15,7 +15,7 @@ ExecStart=/usr/bin/rkt run \
 --mount=volume=etc-ssl-certs,target=/etc/ssl/certs \
 --volume=etcd-cert-dir,kind=host,source={{ etcd_cert_dir }},readOnly=true \
 --mount=volume=etcd-cert-dir,target={{ etcd_cert_dir }} \
---volume=var-lib-etcd,kind=host,source=/var/lib/etcd,readOnly=false \
+--volume=var-lib-etcd,kind=host,source={{ etcd_data_dir }},readOnly=false \
 --mount=volume=var-lib-etcd,target=/var/lib/etcd \
 --set-env-file=/etc/etcd.env \
 --stage1-from-dir=stage1-fly.aci \

roles/etcd/templates/etcd.j2

-ETCD_DATA_DIR=/var/lib/etcd
+ETCD_DATA_DIR={{ etcd_data_dir }}
 ETCD_ADVERTISE_CLIENT_URLS={{ etcd_client_url }}
 ETCD_INITIAL_ADVERTISE_PEER_URLS={{ etcd_peer_url }}
 ETCD_INITIAL_CLUSTER_STATE={% if etcd_cluster_is_healthy.rc != 0 | bool %}new{% else %}existing{% endif %}

roles/reset/tasks/main.yml

@@ -56,7 +56,7 @@
   with_items:
     - "{{kube_config_dir}}"
     - /var/lib/kubelet
-    - /var/lib/etcd
+    - "{{ etcd_data_dir }}"
     - /etc/ssl/etcd
     - /var/log/calico
     - /etc/cni