update docker compose

technology/tools/Docker Compose.md

@@ -2,6 +2,7 @@
 obj: application
 source: https://docs.docker.com/compose
 repo: https://github.com/docker/compose
+rev: 2024-07-15
 ---
 
 # Docker Compose
@@ -420,7 +421,8 @@ constraints
 deploy:
   placement:
     constraints:
-      - disktype=ssd
+      - node.labels.disk == ssd
+      - node.role == manager
 ```
 
 ```yaml
@@ -444,4 +446,25 @@ deploy:
   placement:
     preferences:
       datacenter: us-east
-```
+```
+
+### `resources`
+`resources` configures physical resource constraints for container to run on platform. Those constraints can be configured as:
+- `limits`: The platform must prevent the container to allocate more.
+- `reservations`: The platform must guarantee the container can allocate at least the configured amount.
+
+The following can be configured:
+- `cpus`: `cpus` configures a limit or reservation for how much of the available CPU resources, as number of cores, a container can use.
+- `memory`: `memory` configures a limit or reservation on the amount of memory a container can allocate, set as a string expressing a byte value.
+- `pids`: `pids` tunes a container’s PIDs limit, set as an integer.
+
+```yml
+deploy:
+  resources:
+    limits:
+      cpus: 0.5
+      memory: 128MiB
+    reservations:
+      cpus: 0.3
+      memory: 64MiB
+```