append nodes to builder support

Signed-off-by: CrazyMax <crazy-max@users.noreply.github.com>

.github/workflows/ci.yml

@@ -305,9 +305,13 @@ jobs:
           platforms: ${{ matrix.qemu-platforms }}
       -
         name: Set up Docker Buildx
+        id: buildx
         uses: ./
         with:
           version: ${{ matrix.buildx-version }}
+      -
+        name: List builder platforms
+        run: echo ${{ steps.buildx.outputs.platforms }}
 
   build-ref:
     runs-on: ubuntu-latest
@@ -416,3 +420,32 @@ jobs:
             echo "::error::Should have failed"
             exit 1
           fi
+
+  append:
+    runs-on: ubuntu-latest
+    steps:
+      -
+        name: Checkout
+        uses: actions/checkout@v3
+      -
+        name: Create dummy contexts
+        run: |
+          docker context create ctxbuilder2
+          docker context create ctxbuilder3
+      -
+        name: Set up Docker Buildx
+        id: buildx
+        uses: ./
+        with:
+          append: |
+            - name: builder2
+              endpoint: ctxbuilder2
+              platforms: linux/amd64
+              driver-opts:
+                - image=moby/buildkit:master
+                - network=host
+            - endpoint: ctxbuilder3
+              platforms: linux/arm64
+      -
+        name: List builder platforms
+        run: echo ${{ steps.buildx.outputs.platforms }}

README.md

@@ -21,6 +21,7 @@ ___
 * [Usage](#usage)
 * [Advanced usage](#advanced-usage)
   * [Authentication support](docs/advanced/auth.md)
+  * [Append additional nodes to the builder](docs/advanced/append-nodes.md)
   * [Install by default](docs/advanced/install-default.md)
   * [BuildKit daemon configuration](docs/advanced/buildkit-config.md)
   * [Standalone mode](docs/advanced/standalone.md)
@@ -61,6 +62,7 @@ jobs:
 ## Advanced usage
 
 * [Authentication support](docs/advanced/auth.md)
+* [Append additional nodes to the builder](docs/advanced/append-nodes.md)
 * [Install by default](docs/advanced/install-default.md)
 * [BuildKit daemon configuration](docs/advanced/buildkit-config.md)
 * [Standalone mode](docs/advanced/standalone.md)
@@ -82,6 +84,7 @@ Following inputs can be used as `step.with` keys
 | `endpoint`        | String | [Optional address for docker socket](https://docs.docker.com/engine/reference/commandline/buildx_create/#description) or context from `docker context ls`                                       |
 | `config`¹         | String | [BuildKit config file](https://docs.docker.com/engine/reference/commandline/buildx_create/#config)                                                                                              |
 | `config-inline`¹  | String | Same as `config` but inline                                                                                                                                                                     |
+| `append`          | YAML   | [Append additional nodes](docs/advanced/append-nodes.md) to the builder                                                                                                                         |
 
 > * ¹ `config` and `config-inline` are mutually exclusive
 

__tests__/context.test.ts

@@ -4,6 +4,7 @@ import * as os from 'os';
 import * as path from 'path';
 import * as uuid from 'uuid';
 import * as context from '../src/context';
+import * as nodes from '../src/nodes';
 
 const tmpdir = fs.mkdtempSync(path.join(os.tmpdir(), 'docker-setup-buildx-')).split(path.sep).join(path.posix.sep);
 jest.spyOn(context, 'tmpDir').mockImplementation((): string => {
@@ -103,6 +104,57 @@ describe('getCreateArgs', () => {
   );
 });
 
+describe('getAppendArgs', () => {
+  beforeEach(() => {
+    process.env = Object.keys(process.env).reduce((object, key) => {
+      if (!key.startsWith('INPUT_')) {
+        object[key] = process.env[key];
+      }
+      return object;
+    }, {});
+  });
+
+  // prettier-ignore
+  test.each([
+    [
+      0,
+      new Map<string, string>([
+        ['install', 'false'],
+        ['use', 'true'],
+      ]),
+      {
+        "name": "aws_graviton2",
+        "endpoint": "ssh://me@graviton2",
+        "driver-opts": [
+          "image=moby/buildkit:latest"
+        ],
+        "buildkitd-flags": "--allow-insecure-entitlement security.insecure --allow-insecure-entitlement network.host",
+        "platforms": "linux/arm64"
+      },
+      [
+        'create',
+        '--name', 'builder-9b1deb4d-3b7d-4bad-9bdd-2b0d7b3dcb6d',
+        '--append',
+        '--node', 'aws_graviton2',
+        '--driver-opt', 'image=moby/buildkit:latest',
+        '--buildkitd-flags', '--allow-insecure-entitlement security.insecure --allow-insecure-entitlement network.host',
+        '--platform', 'linux/arm64',
+        'ssh://me@graviton2'
+      ]
+    ]
+  ])(
+    '[%d] given %p as inputs, returns %p',
+    async (num: number, inputs: Map<string, string>, node: nodes.Node, expected: Array<string>) => {
+      inputs.forEach((value: string, name: string) => {
+        setInput(name, value);
+      });
+      const inp = await context.getInputs();
+      const res = await context.getAppendArgs(inp, node, '0.9.0');
+      expect(res).toEqual(expected);
+    }
+  );
+});
+
 describe('getInputList', () => {
   it('handles single line correctly', async () => {
     await setInput('foo', 'bar');

action.yml

@@ -38,6 +38,9 @@ inputs:
   config-inline:
     description: 'Inline BuildKit config'
     required: false
+  append:
+    description: 'Append additional nodes to the builder'
+    required: false
 
 outputs:
   name:

docs/advanced/append-nodes.md

@@ -0,0 +1,56 @@
+# Append additional nodes to the builder
+
+Buildx also supports running builds on multiple machines. This is useful for
+building [multi-platform images](https://docs.docker.com/build/building/multi-platform/)
+on native nodes for more complicated cases that are not handled by QEMU and
+generally have better performance or for distributing the build across multiple
+machines.
+
+You can append nodes to the builder that is going to be created with the
+`append` input in the form of a YAML string document to remove limitations
+intrinsically linked to GitHub Actions (only string format is handled in the
+input fields):
+
+| Name              | Type   | Description                                                                                                                                                                                                                                                                           |
+|-------------------|--------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
+| `name`            | String | [Name of the node](https://docs.docker.com/engine/reference/commandline/buildx_create/#node). If empty, it is the name of the builder it belongs to, with an index number suffix. This is useful to set it if you want to modify/remove a node in an underlying step of you workflow. |
+| `endpoint`        | String | [Docker context or endpoint](https://docs.docker.com/engine/reference/commandline/buildx_create/#description) of the node to add to the builder                                                                                                                                       |
+| `driver-opts`     | List   | List of additional [driver-specific options](https://docs.docker.com/engine/reference/commandline/buildx_create/#driver-opt)                                                                                                                                                          |
+| `buildkitd-flags` | String | [Flags for buildkitd](https://docs.docker.com/engine/reference/commandline/buildx_create/#buildkitd-flags) daemon                                                                                                                                                                     |
+| `platforms`       | String | Fixed [platforms](https://docs.docker.com/engine/reference/commandline/buildx_create/#platform) for the node. If not empty, values take priority over the detected ones.                                                                                                              |
+
+Here is an example using remote nodes with the [`remote` driver](https://docs.docker.com/build/building/drivers/remote/)
+and [TLS authentication](auth.md#tls-authentication):
+
+```yaml
+name: ci
+
+on:
+  push:
+
+jobs:
+  buildx:
+    runs-on: ubuntu-latest
+    steps:
+      -
+        name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v2
+        with:
+          driver: remote
+          endpoint: tcp://oneprovider:1234
+          append: |
+            - endpoint: tcp://graviton2:1234
+              platforms: linux/arm64
+            - endpoint: tcp://linuxone:1234
+              platforms: linux/s390x
+        env:
+          BUILDER_NODE_0_AUTH_TLS_CACERT: ${{ secrets.ONEPROVIDER_CA }}
+          BUILDER_NODE_0_AUTH_TLS_CERT: ${{ secrets.ONEPROVIDER_CERT }}
+          BUILDER_NODE_0_AUTH_TLS_KEY: ${{ secrets.ONEPROVIDER_KEY }}
+          BUILDER_NODE_1_AUTH_TLS_CACERT: ${{ secrets.GRAVITON2_CA }}
+          BUILDER_NODE_1_AUTH_TLS_CERT: ${{ secrets.GRAVITON2_CERT }}
+          BUILDER_NODE_1_AUTH_TLS_KEY: ${{ secrets.GRAVITON2_KEY }}
+          BUILDER_NODE_2_AUTH_TLS_CACERT: ${{ secrets.LINUXONE_CA }}
+          BUILDER_NODE_2_AUTH_TLS_CERT: ${{ secrets.LINUXONE_CERT }}
+          BUILDER_NODE_2_AUTH_TLS_KEY: ${{ secrets.LINUXONE_KEY }}
+```

docs/advanced/auth.md

@@ -41,11 +41,6 @@ the node in the list of nodes:
 * `BUILDER_NODE_<idx>_AUTH_TLS_CERT`
 * `BUILDER_NODE_<idx>_AUTH_TLS_KEY`
 
-> **Note**
-> 
-> The index is always `0` at the moment as we don't support (yet) appending new
-> nodes with this action.
-
 ```yaml
 name: ci
 

jest.config.ts

@@ -1,10 +1,13 @@
 module.exports = {
   clearMocks: true,
   moduleFileExtensions: ['js', 'ts'],
-  setupFiles: ["dotenv/config"],
+  setupFiles: ['dotenv/config'],
   testMatch: ['**/*.test.ts'],
   transform: {
     '^.+\\.ts$': 'ts-jest'
   },
+  moduleNameMapper: {
+    '^csv-parse/sync': '<rootDir>/node_modules/csv-parse/dist/cjs/sync.cjs'
+  },
   verbose: true
-}
+};

package.json

@@ -31,6 +31,8 @@
     "@actions/exec": "^1.1.1",
     "@actions/http-client": "^2.0.1",
     "@actions/tool-cache": "^2.0.1",
+    "csv-parse": "^5.1.0",
+    "js-yaml": "^4.1.0",
     "semver": "^7.3.7",
     "tmp": "^0.2.1",
     "uuid": "^9.0.0"

src/context.ts

@@ -3,7 +3,9 @@ import * as os from 'os';
 import path from 'path';
 import * as tmp from 'tmp';
 import * as uuid from 'uuid';
+import {parse} from 'csv-parse/sync';
 import * as buildx from './buildx';
+import * as nodes from './nodes';
 import * as core from '@actions/core';
 
 let _tmpDir: string;
@@ -32,6 +34,7 @@ export interface Inputs {
   endpoint: string;
   config: string;
   configInline: string;
+  append: string;
 }
 
 export async function getInputs(): Promise<Inputs> {
@@ -45,7 +48,8 @@ export async function getInputs(): Promise<Inputs> {
     use: core.getBooleanInput('use'),
     endpoint: core.getInput('endpoint'),
     config: core.getInput('config'),
-    configInline: core.getInput('config-inline')
+    configInline: core.getInput('config-inline'),
+    append: core.getInput('append')
   };
 }
 
@@ -79,6 +83,28 @@ export async function getCreateArgs(inputs: Inputs, buildxVersion: string): Prom
   return args;
 }
 
+export async function getAppendArgs(inputs: Inputs, node: nodes.Node, buildxVersion: string): Promise<Array<string>> {
+  const args: Array<string> = ['create', '--name', inputs.name, '--append'];
+  if (node.name) {
+    args.push('--node', node.name);
+  }
+  if (node['driver-opts'] && buildx.satisfies(buildxVersion, '>=0.3.0')) {
+    await asyncForEach(node['driver-opts'], async driverOpt => {
+      args.push('--driver-opt', driverOpt);
+    });
+    if (inputs.driver != 'remote' && node['buildkitd-flags']) {
+      args.push('--buildkitd-flags', node['buildkitd-flags']);
+    }
+  }
+  if (node.platforms) {
+    args.push('--platform', node.platforms);
+  }
+  if (node.endpoint) {
+    args.push(node.endpoint);
+  }
+  return args;
+}
+
 export async function getInspectArgs(inputs: Inputs, buildxVersion: string): Promise<Array<string>> {
   const args: Array<string> = ['inspect', '--bootstrap'];
   if (buildx.satisfies(buildxVersion, '>=0.4.0')) {
@@ -88,14 +114,33 @@ export async function getInspectArgs(inputs: Inputs, buildxVersion: string): Pro
 }
 
 export async function getInputList(name: string, ignoreComma?: boolean): Promise<string[]> {
+  const res: Array<string> = [];
+
   const items = core.getInput(name);
   if (items == '') {
-    return [];
+    return res;
+  }
+
+  const records = parse(items, {
+    columns: false,
+    relaxQuotes: true,
+    comment: '#',
+    relaxColumnCount: true,
+    skipEmptyLines: true
+  });
+
+  for (const record of records as Array<string[]>) {
+    if (record.length == 1) {
+      res.push(record[0]);
+      continue;
+    } else if (!ignoreComma) {
+      res.push(...record);
+      continue;
+    }
+    res.push(record.join(','));
   }
-  return items
-    .split(/\r?\n/)
-    .filter(x => x)
-    .reduce<string[]>((acc, line) => acc.concat(!ignoreComma ? line.split(',').filter(x => x) : line).map(pat => pat.trim()), []);
+
+  return res.filter(item => item).map(pat => pat.trim());
 }
 
 export const asyncForEach = async (array, callback) => {

src/main.ts

@@ -5,6 +5,7 @@ import * as auth from './auth';
 import * as buildx from './buildx';
 import * as context from './context';
 import * as docker from './docker';
+import * as nodes from './nodes';
 import * as stateHelper from './state-helper';
 import * as util from './util';
 import * as core from '@actions/core';
@@ -71,6 +72,21 @@ async function run(): Promise<void> {
       core.endGroup();
     }
 
+    if (inputs.append) {
+      core.startGroup(`Appending node(s) to builder`);
+      let nodeIndex = 1;
+      for (const node of nodes.Parse(inputs.append)) {
+        const authOpts = auth.setCredentials(credsdir, nodeIndex, inputs.driver, node.endpoint || '');
+        if (authOpts.length > 0) {
+          node['driver-opts'] = [...(node['driver-opts'] || []), ...authOpts];
+        }
+        const appendCmd = buildx.getCommand(await context.getAppendArgs(inputs, node, buildxVersion), standalone);
+        await exec.exec(appendCmd.commandLine, appendCmd.args);
+        nodeIndex++;
+      }
+      core.endGroup();
+    }
+
     core.startGroup(`Booting builder`);
     const inspectCmd = buildx.getCommand(await context.getInspectArgs(inputs, buildxVersion), standalone);
     await exec.exec(inspectCmd.commandLine, inspectCmd.args);
@@ -88,9 +104,18 @@ async function run(): Promise<void> {
     core.startGroup(`Inspect builder`);
     const builder = await buildx.inspect(inputs.name, standalone);
     const firstNode = builder.nodes[0];
+    const reducedPlatforms: Array<string> = [];
+    for (const node of builder.nodes) {
+      for (const platform of node.platforms?.split(',') || []) {
+        if (reducedPlatforms.indexOf(platform) > -1) {
+          continue;
+        }
+        reducedPlatforms.push(platform);
+      }
+    }
     core.info(JSON.stringify(builder, undefined, 2));
     core.setOutput('driver', builder.driver);
-    core.setOutput('platforms', firstNode.platforms);
+    core.setOutput('platforms', reducedPlatforms.join(','));
     core.setOutput('nodes', JSON.stringify(builder.nodes, undefined, 2));
     core.setOutput('endpoint', firstNode.endpoint); // TODO: deprecated, to be removed in a later version
     core.setOutput('status', firstNode.status); // TODO: deprecated, to be removed in a later version