etcd: exclude performance tuning (nice/ionice) for containers

etcd: exclude performance tuning (nice/ionice) for containers ('docker', 'lxc', 'podman') to prevent test failures in CI.

Fixed:

Mar 01 13:22:40 dcs-node01 systemd[1]: Starting Etcd Server...
Mar 01 13:22:40 dcs-node01 systemd[2273]: etcd.service: Failed to set up IO scheduling priority: Operation not permitted
Mar 01 13:22:40 dcs-node01 systemd[2273]: etcd.service: Failed at step IOPRIO spawning /bin/bash: Operation not permitted
Mar 01 13:22:40 dcs-node01 systemd[1]: etcd.service: Main process exited, code=exited, status=211/IOPRIO
Mar 01 13:22:40 dcs-node01 systemd[1]: etcd.service: Failed with result 'exit-code'.
Mar 01 13:22:40 dcs-node01 systemd[1]: Failed to start Etcd Server.

previous commit:

2f41e80

roles/etcd/templates/etcd.service.j2

@@ -3,7 +3,7 @@ Description=Etcd Server
 After=network.target
 After=network-online.target
 Wants=network-online.target
-  
+
 [Service]
 Type=notify
 WorkingDirectory={{ etcd_data_dir }}
@@ -13,9 +13,12 @@ User=etcd
 ExecStart=/bin/bash -c "GOMAXPROCS=$(nproc) /usr/local/bin/etcd"
 Restart=on-failure
 LimitNOFILE=65536
+
+{% if ansible_virtualization_type not in ['docker', 'lxc', 'podman'] %}
 IOSchedulingClass=realtime
 IOSchedulingPriority=0
 Nice=-20
-
+{% endif %}
+
 [Install]
 WantedBy=multi-user.target