Expand configuration options

Add cleanup interval option
Enhanced some options to be per-compiler
Fix concurrent option not being used

README.md

@@ -106,22 +106,41 @@ The container is locked down, so there is no networking, limited memory and CPU
 0. Install Docker 18+
 0. Install Node 10+
 0. Run `npm i`
-0. Fill out `config.json`
-    - `owner` - The owner(s) of the bot.  
-        Use an array for multiple owners.
-    - `token` - The bot token.  
-    - `prefix` - The prefix for commands.  
-    - `codePrefix` - The prefix for code evaluation.  
-    - `languages` Languages to use.  
-        The language names here are different from the user-facing ones.  
-        Check the filenames in `src/languages/` for the language names.  
-        Change to `null` to enable all languages.  
-    - `memory` Max memory usage of a container.  
-    - `cpu` Max CPU usage of a container.  
-    - `timeout` Time limit for code in milliseconds.  
-    - `prepare` Whether to start containers on setup.  
-        Setting to true will speed up the first eval, but that language might not be used.
-    - `parallel` Whether to build images and container in parallel.  
-        Faster, but will take more resources.
-    - `concurrent` Number of code evaluations per language than can run at a time.  
+0. Fill out `config.json` as described in the configuration section below
 0. Run `node .`
+
+## Configuration
+
+### Bot
+
+- `owner` - The owner(s) of the bot.  
+    Use an array for multiple owners.
+- `token` - The bot token.  
+- `prefix` - The prefix for commands.  
+- `codePrefix` - The prefix for code evaluation.  
+
+### Setup
+
+- `languages` Languages to use.  
+    The language names here are different from the user-facing ones.  
+    Check the filenames in `src/languages/` for the language names.  
+    Change to `null` to enable all languages.  
+- `prepare` Whether to start containers on setup.  
+    Setting to true will speed up the first eval, but that language might not be used.  
+- `parallel` Whether to build images in parallel.  
+    Will also setup containers in parallel if `prepare` is set.  
+    Faster, but will take more resources.  
+- `cleanup` Interval in minutes to occasionally kill all containers.  
+    Set to `0` to disable.  
+
+### Compilers
+
+For each of these options, you can use either the expected value to set it for all compilers or an object with compiler names to the expected values.  
+If using an object, you can set the default with the `default` key.  
+The compiler names are the folder names under `docker/`.  
+
+- `memory` Max memory usage of a container.  
+- `cpu` Max CPU usage of a container.  
+- `timeout` Time limit for code in milliseconds.  
+- `concurrent` Number of code evaluations than can run at a time per container.  
+    The more that can run, the more resources a container would need.   

config.example.json

@@ -8,10 +8,11 @@
         "python",
         "javascript"
     ],
+    "prepare": false,
+    "parallel": false,
+    "cleanup": 60,
     "memory": "256m",
     "cpus": "0.25",
     "timeout": 10000,
-    "prepare": false,
-    "parallel": false,
     "concurrent": 10
 }

src/struct/LanguageHandler.js

@@ -65,6 +65,10 @@ class LanguageHandler extends AkairoHandler {
                 await this.buildImage(dockerID);
             }
         }
+
+        if (this.client.config.cleanup > 0) {
+            setInterval(() => this.cleanup().catch(() => null), this.client.config.cleanup * 60 * 1000);
+        }
     }
 
     async buildImage(dockerID) {
@@ -72,7 +76,8 @@ class LanguageHandler extends AkairoHandler {
         await util.promisify(childProcess.exec)(`docker build -t "1computer1/comp_iler:${dockerID}" ${folder}`);
         // eslint-disable-next-line no-console
         console.log(`Built image 1computer1/comp_iler:${dockerID}.`);
-        this.queues.set(dockerID, new Queue(10));
+        const concurrent = this.getCompilerConfig(dockerID, 'concurrent', 'number');
+        this.queues.set(dockerID, new Queue(concurrent));
         if (this.client.config.prepare) {
             await this.setupContainer(dockerID);
         }
@@ -83,11 +88,13 @@ class LanguageHandler extends AkairoHandler {
             return this.containers.get(dockerID);
         }
 
+        const cpus = this.getCompilerConfig(dockerID, 'cpus', 'string');
+        const memory = this.getCompilerConfig(dockerID, 'memory', 'string');
         const name = `comp_iler-${dockerID}-${Date.now()}`;
         const proc = childProcess.spawn('docker', [
             'run', '--rm', `--name=${name}`, '-u1000', '-w/tmp/', '-dt',
-            '--net=none', `--cpus=${this.client.config.cpus}`,
-            `-m=${this.client.config.memory}`, `--memory-swap=${this.client.config.memory}`,
+            '--net=none', `--cpus=${cpus}`,
+            `-m=${memory}`, `--memory-swap=${memory}`,
             `1computer1/comp_iler:${dockerID}`, '/bin/sh'
         ]);
 
@@ -120,8 +127,9 @@ class LanguageHandler extends AkairoHandler {
                 name, '/bin/sh', '/var/run/run.sh', code
             ]);
 
+            const timeout = this.getCompilerConfig(dockerID, 'timeout', 'number');
             try {
-                const result = await this.handleSpawn(proc, true);
+                const result = await this.handleSpawn(proc, timeout);
                 return result;
             } catch (err) {
                 this.containers.delete(dockerID);
@@ -131,12 +139,12 @@ class LanguageHandler extends AkairoHandler {
         });
     }
 
-    handleSpawn(proc, withTimeout = false) {
+    handleSpawn(proc, timeout = null) {
         return new Promise((resolve, reject) => {
-            if (withTimeout) {
+            if (timeout !== null) {
                 setTimeout(() => {
                     reject(new Error('Timed out'));
-                }, this.client.config.timeout);
+                }, timeout);
             }
 
             let data = '';
@@ -177,6 +185,15 @@ class LanguageHandler extends AkairoHandler {
     cleanup() {
         return Promise.all(this.containers.map(({ name }) => this.kill(name)));
     }
+
+    getCompilerConfig(dockerID, key, type) {
+        const o = this.client.config[key];
+        return typeof o === type
+            ? o
+            : o[dockerID] !== null
+                ? o[dockerID]
+                : o.default;
+    }
 }
 
 module.exports = LanguageHandler;