feat: Add example systemd units and config files for 'baremetal' depl…

…oyment

Signed-off-by: Joonas Bergius <joonas@cosmonic.com>

deploy/baremetal/nats-leaf.conf

@@ -0,0 +1,15 @@
+# /etc/wasmcloud/nats-leaf.conf
+jetstream {
+    domain=leaf
+    store_dir="/tmp/nats-leaf-jetstream"
+}
+
+listen: "127.0.0.1:4222"
+leafnodes {
+    remotes = [
+        {
+          url: "nats://<ip-or-url-to-nats-server>"
+          # credentials: "/etc/wasmcloud/nats.creds"
+        },
+    ]
+}

deploy/baremetal/nats-leaf.service

@@ -0,0 +1,18 @@
+# $HOME/.config/systemd/user/nats-leaf.service
+[Unit]
+Description=NATS Leaf Server
+After=network-online.target systemd-timesyncd.service
+
+[Service]
+PrivateTmp=true
+Type=simple
+Environment=NATS_CONFIG=/etc/wasmcloud/nats-leaf.conf
+ExecStart=/usr/local/bin/nats-server -js --pid /tmp/nats-leaf.pid --config ${NATS_CONFIG}
+ExecReload=/bin/kill -s HUP $MAINPID
+ExecStop=/bin/kill -s SIGINT $MAINPID
+# The nats-server uses SIGUSR2 to trigger using Lame Duck Mode (LDM) shutdown
+KillSignal=SIGUSR2
+# You might want to adjust TimeoutStopSec too.
+
+[Install]
+WantedBy=multi-user.target

deploy/baremetal/wasmcloud-host.env

@@ -0,0 +1,4 @@
+# /etc/wasmcloud/wasmcloud-host.env
+RUST_LOG=info
+WASMCLOUD_JS_DOMAIN=default
+# more config can go here ...

deploy/baremetal/wasmcloud-host.service

@@ -0,0 +1,17 @@
+# $HOME/.config/systemd/user/wasmcloud-host.service
+[Unit]
+Description=wasmCloud Host
+Documentation=https://wasmcloud.com/docs/
+After=nats-leaf.service network-online.target
+Wants=network-online.target
+Requires=nats-leaf.service
+
+[Service]
+EnvironmentFile=/etc/wasmcloud/wasmcloud-host.env
+ExecStart=/usr/local/bin/wasmcloud
+Restart=always
+StartLimitInterval=0
+RestartSec=5
+
+[Install]
+WantedBy=multi-user.target