Add ability to run server as non root

pillar.example

@@ -14,3 +14,5 @@ vault:
   dev_mode: true
   service:
     type: upstart
+  user: root
+  group: root

vault/defaults.yaml

@@ -15,3 +15,5 @@ vault:
   dev_mode: true
   service:
     type: systemd
+  user: root
+  group: root

vault/files/vault_systemd.service.jinja

@@ -8,3 +8,5 @@ After=network-online.target consul.service
 EnvironmentFile=-/etc/sysconfig/vault
 Restart=on-failure
 ExecStart=/usr/local/bin/vault server {% if vault.dev_mode %}-dev{% else %} -config="/etc/vault/config/server.hcl"{% endif %}
+User={{ vault.user }}
+Group={{ vault.group }}

vault/init.sls

@@ -18,3 +18,9 @@ install vault:
       - cmd: download vault
       - pkg: unzip
     - unless: test -e /usr/local/bin/vault
+
+vault set cap mlock:
+  cmd.run:
+    - name: "setcap cap_ipc_lock=+ep /usr/local/bin/vault"
+    - watch:
+      - cmd: install vault