doc: deprecate centOS 7

.github/workflows/build.yml

@@ -30,7 +30,7 @@ jobs:
         with:
           go-version: "1.22"
       - name: Run GoReleaser
-        uses: goreleaser/goreleaser-action@v5
+        uses: goreleaser/goreleaser-action@v6
         if: ${{ contains(github.ref, 'v') }}
         with:
           # either 'goreleaser' (default) or 'goreleaser-pro'
@@ -40,7 +40,7 @@ jobs:
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
       - name: Test GoReleaser
-        uses: goreleaser/goreleaser-action@v5
+        uses: goreleaser/goreleaser-action@v6
         if: ${{ ! contains(github.ref, 'v') }}
         with:
           # either 'goreleaser' (default) or 'goreleaser-pro'

.goreleaser.yaml

@@ -1,6 +1,7 @@
 # This is an example .goreleaser.yml file with some sensible defaults.
 # Make sure to check the documentation at https://goreleaser.com
 project_name: go-judge
+version: 2
 before:
   hooks:
     # You may remove this if you don't use go modules.

README.cn.md

@@ -537,17 +537,6 @@ interface Output {
 
 在 `systemd` 为 `init` 的发行版中运行时，`go-judge` 会使用 `dbus` 通知 `systemd` 来创建一个临时 `scope` 作为 `cgroup` 的根。
 
-#### CentOS 7
-
-需要开启 user 命名空间来使用 [stack overflow](https://superuser.com/questions/1294215/is-it-safe-to-enable-user-namespaces-in-centos-7-4-and-how-to-do-it/1294246#1294246)
-
-```bash
-echo user.max_user_namespaces=10000 >> /etc/sysctl.d/98-userns.conf
-sysctl -p
-# 重启生效
-reboot
-```
-
 #### 内存使用
 
 控制进程通常会使用 `20M` 内存，每个容器进程最大会使用 `20M` 内存，每个请求最大会使用 `2 * 16M` + 总 copy out max 限制 * 2 内存。请注意，缓存文件会存储在宿主机的共享内存中 (`/dev/shm`)，请保证其大小足够存储运行时最大可能文件。

README.md

@@ -761,17 +761,6 @@ When running in containers, the `go-judge` will migrate all processed into `/api
 
 When running in Linux distributions powered by `systemd`, the `go-judge` will contact `systemd` via `dbus` to create a transient scope as cgroup root.
 
-#### CentOS 7
-
-By default, user namespace is disabled and it can be enabled following [stack overflow](https://superuser.com/questions/1294215/is-it-safe-to-enable-user-namespaces-in-centos-7-4-and-how-to-do-it/1294246#1294246)
-
-```bash
-echo user.max_user_namespaces=10000 >> /etc/sysctl.d/98-userns.conf
-sysctl -p
-# reboot make the config effective
-reboot
-```
-
 #### Memory Usage
 
 The controller will consume `20M` memory and each container will consume `20M` + size of tmpfs `2 * 128M`. For each request, it consumes as much as user program limit + extra limit (`16k`) + total copy out max. Notice that the cached file stores in the shared memory (`/dev/shm`) of the host, so please ensure enough size allocated.