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docs: review and update Compose support matrix
This commit is contained in:
Pasha Sviderski
@@ -3,60 +3,60 @@
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Uncloud supports a subset of the [Compose specification](https://compose-spec.io/) with some extensions and limitations.
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The following table shows the support status for main Compose features:
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| Feature | Support Status | Notes |
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| ------------------ | ------------------- | --------------------------------------------------- |
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| **Services** | | |
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| `build` | ✅ Supported | Build context and Dockerfile |
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| `command` | ✅ Supported | Override container command |
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| `configs` | ✅ Supported | File-based and inline configs |
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| `cpus` | ✅ Supported | CPU limit |
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| `depends_on` | ❌ Not supported | Services start independently |
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| `dns` | ❌ Not supported | Built-in service discovery |
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| `dns_search` | ❌ Not supported | Built-in service discovery |
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| `entrypoint` | ✅ Supported | Override container entrypoint |
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| `env_file` | ✅ Supported | Environment file |
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| `environment` | ✅ Supported | Environment variables |
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| `image` | ✅ Supported | Container image specification |
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| `init` | ✅ Supported | Run init process in container |
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| `labels` | ❌ Not supported | Not currently needed |
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| `links` | ❌ Not supported | Use service names for communication |
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| `logging` | ✅ Supported | Uses Docker daemon logging |
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| `mem_limit` | ✅ Supported | Memory limit |
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| `mem_reservation` | ✅ Supported | Memory reservation |
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| `mem_swappiness` | ❌ Not supported | |
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| `memswap_limit` | ❌ Not supported | |
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| `networks` | ❌ Not supported | All containers share cluster network |
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| `ports` | ⚠️ Limited | Basic port publishing. Use `x-ports` for HTTP/HTTPS |
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| `privileged` | ✅ Supported | Run containers in privileged mode |
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| `pull_policy` | ✅ Supported | always, missing, never |
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| `secrets` | ❌ Not supported | Use configs or environment variables |
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| `security_opt` | ❌ Not supported | |
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| `storage_opt` | ❌ Not supported | |
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| `user` | ✅ Supported | Set container user |
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| `volumes` | ✅ Supported | Named volumes, bind mounts, tmpfs |
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| **Deploy** | | |
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| `labels` | ❌ Not supported | Not needed |
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| `mode` | ⚠️ Limited | Only `replicated` supported |
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| `placement` | ❌ Not supported | Use `x-machines` extension |
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| `replicas` | ✅ Supported | Number of container replicas |
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| `resources` | ⚠️ Limited | CPU and memory limits only |
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| `restart_policy` | ❌ Not supported | Services auto-restart |
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| **Volumes** | | |
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| Named volumes | ✅ Supported | Docker volumes |
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| Bind mounts | ✅ Supported | Host path binding |
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| Tmpfs mounts | ✅ Supported | In-memory filesystems |
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| Volume labels | ✅ Supported | Custom labels |
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| External volumes | ⚠️ Limited | Must exist before deployment |
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| Volume drivers | ⚠️ Limited | Local driver only |
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| **Configs** | | |
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| File-based configs | ✅ Supported | Read from file |
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| Inline configs | ✅ Supported | Defined in compose file |
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| External configs | ❌ Not supported | Not supported |
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| Short syntax | ❌ Not supported | Use long syntax only |
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| **Extensions** | | |
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| `x-caddy` | ✅ Uncloud-specific | Custom Caddy configuration |
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| `x-machines` | ✅ Uncloud-specific | Machine placement constraints |
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| `x-ports` | ✅ Uncloud-specific | HTTP/HTTPS port publishing |
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| Feature | Support Status | Notes |
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|--------------------|--------------------|---------------------------------------------------------------------------------------|
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| **Services** | | |
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| `build` | ⚠️ Limited | Build context and Dockerfile |
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| `command` | ✅ Supported | Override container command |
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| `configs` | ✅ Supported | File-based and inline configs |
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| `cpus` | ✅ Supported | CPU limit |
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| `depends_on` | ⚠️ Limited | Services deployed in order but conditions not checked |
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| `dns` | ❌ Not supported | Built-in service discovery |
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| `dns_search` | ❌ Not supported | Built-in service discovery |
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| `entrypoint` | ✅ Supported | Override container entrypoint |
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| `env_file` | ✅ Supported | Environment file |
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| `environment` | ✅ Supported | Environment variables |
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| `image` | ✅ Supported | Container image specification |
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| `init` | ✅ Supported | Run init process in container |
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| `labels` | ❌ Not supported | |
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| `links` | ❌ Not supported | Use service names for communication |
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| `logging` | ✅ Supported | Defaults to [local](https://docs.docker.com/engine/logging/drivers/local/) log driver |
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| `mem_limit` | ✅ Supported | Memory limit |
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| `mem_reservation` | ✅ Supported | Memory reservation |
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| `mem_swappiness` | ❌ Not supported | |
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| `memswap_limit` | ❌ Not supported | |
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| `networks` | ❌ Not supported | All containers share cluster network |
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| `ports` | ⚠️ Limited | `mode: host` only, use `x-ports` for HTTP/HTTPS |
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| `privileged` | ✅ Supported | Run containers in privileged mode |
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| `pull_policy` | ✅ Supported | `always`, `missing`, `never` |
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| `secrets` | ❌ Not supported | Use configs or environment variables |
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| `security_opt` | ❌ Not supported | |
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| `storage_opt` | ❌ Not supported | |
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| `user` | ✅ Supported | Set container user |
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| `volumes` | ✅ Supported | Named volumes, bind mounts, tmpfs |
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| **Deploy** | | |
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| `labels` | ❌ Not supported | |
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| `mode` | ✅ Supported | Either `global` or `replicated` |
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| `placement` | ❌ Not supported | Use `x-machines` extension |
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| `replicas` | ✅ Supported | Number of container replicas |
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| `resources` | ⚠️ Limited | CPU and memory limits only |
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| `restart_policy` | ❌ Not supported | Defaults to `unless-stopped` |
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| **Volumes** | | |
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| Named volumes | ✅ Supported | Docker volumes |
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| Bind mounts | ✅ Supported | Host path binding |
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| Tmpfs mounts | ✅ Supported | In-memory filesystems |
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| Volume labels | ✅ Supported | Custom labels |
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| External volumes | ✅ Supported | Must exist before deployment |
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| Volume drivers | ⚠️ Limited | Local driver only |
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| **Configs** | | |
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| File-based configs | ✅ Supported | Read from file |
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| Inline configs | ✅ Supported | Defined in compose file |
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| External configs | ❌ Not supported | Not supported |
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| Short syntax | ❌ Not supported | Use long syntax only |
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| **Extensions** | | |
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| `x-caddy` | ✅ Uncloud-specific | Custom Caddy configuration |
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| `x-machines` | ✅ Uncloud-specific | Machine placement constraints |
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| `x-ports` | ✅ Uncloud-specific | Service port publishing |
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### Legend
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@@ -64,13 +64,13 @@ The following table shows the support status for main Compose features:
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- ⚠️ **Limited**: Partial support or with restrictions
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- ❌ **Not supported**: Feature is not (yet) available
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## Uncloud Extensions
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## Uncloud extensions
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Uncloud provides several custom extensions to enhance the Compose experience:
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### `x-ports`
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Define HTTP/HTTPS endpoints for services:
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Expose HTTP/HTTPS service ports via the Caddy reverse proxy, or bind TCP/UDP ports directly to the host:
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```yaml
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services:
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@@ -79,11 +79,14 @@ services:
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x-ports:
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- 80/https
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- example.com:80/https
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- 8080:80/tcp@host
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```
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See [Publishing services](../1-ingress/2-publishing-services.md) for more details.
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### `x-caddy`
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Custom Caddy reverse proxy configuration:
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Custom Caddy reverse proxy configuration for a service:
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```yaml
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services:
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@@ -91,17 +94,24 @@ services:
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image: nginx
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x-caddy: |
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example.com {
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reverse_proxy {{ upstreams 80 }}
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reverse_proxy {{upstreams 80}}
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}
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```
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See [Publishing services](../1-ingress/2-publishing-services.md) for more details.
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### `x-machines`
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Specify on what machines the service should run:
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Restrict which machines can run your service. If you deploy multiple replicas, Uncloud automatically spreads them across
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the specified machines.
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```yaml
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services:
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web:
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image: nginx
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x-machines: ["web-1", "web-2"]
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x-machines:
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- machine-1
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- machine-2
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# Short syntax for a single machine
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# x-machines: machine-1
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```
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