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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.vespa.hosted.node.admin.task.util.fs;
import com.yahoo.vespa.hosted.node.admin.nodeagent.UserNamespace;
import com.yahoo.vespa.hosted.node.admin.task.util.file.UnixPath;
import com.yahoo.vespa.test.file.TestFileSystem;
import org.junit.jupiter.api.Test;
import java.io.IOException;
import java.nio.charset.StandardCharsets;
import java.nio.file.FileSystem;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.StandardCopyOption;
import java.nio.file.StandardOpenOption;
import java.util.Map;
import static org.junit.jupiter.api.Assertions.assertEquals;
/**
* @author valerijf
*/
class ContainerFileSystemTest {
private final FileSystem fileSystem = TestFileSystem.create();
private final UnixPath containerRootOnHost = new UnixPath(fileSystem.getPath("/data/storage/ctr1"));
private final UserNamespace userNamespace = new UserNamespace(10_000, 11_000, "vespa", "users", 1000, 100);
private final ContainerFileSystem containerFs = ContainerFileSystem.create(containerRootOnHost.createDirectories().toPath(), userNamespace);
@Test
public void creates_files_and_directories_with_container_root_as_owner() throws IOException {
ContainerPath containerPath = ContainerPath.fromPathInContainer(containerFs, Path.of("/opt/vespa/logs/file"));
UnixPath unixPath = new UnixPath(containerPath).createParents().writeUtf8File("hello world");
for (ContainerPath p = containerPath; p.getParent() != null; p = p.getParent())
assertOwnership(p, 0, 0, 10000, 11000);
unixPath.setOwnerId(500).setGroupId(1000);
assertOwnership(containerPath, 500, 1000, 10500, 12000);
UnixPath hostFile = new UnixPath(fileSystem.getPath("/file")).createNewFile();
ContainerPath destination = ContainerPath.fromPathInContainer(containerFs, Path.of("/copy1"));
Files.copy(hostFile.toPath(), destination);
assertOwnership(destination, 0, 0, 10000, 11000);
}
@Test
public void file_write_and_read() throws IOException {
ContainerPath containerPath = ContainerPath.fromPathInContainer(containerFs, Path.of("/file"));
UnixPath unixPath = new UnixPath(containerPath);
unixPath.writeUtf8File("hello");
assertOwnership(containerPath, 0, 0, 10000, 11000);
unixPath.setOwnerId(500).setGroupId(200);
assertOwnership(containerPath, 500, 200, 10500, 11200);
Files.write(containerPath, " world".getBytes(StandardCharsets.UTF_8), StandardOpenOption.APPEND);
assertOwnership(containerPath, 500, 200, 10500, 11200); // Owner should not have been updated as the file already existed
assertEquals("hello world", unixPath.readUtf8File());
}
@Test
public void copy() throws IOException {
UnixPath hostFile = new UnixPath(fileSystem.getPath("/file")).createNewFile();
ContainerPath destination = ContainerPath.fromPathInContainer(containerFs, Path.of("/dest"));
// If file is copied to JimFS path, the UID/GIDs are not fixed
Files.copy(hostFile.toPath(), destination.pathOnHost());
assertEquals(String.valueOf(userNamespace.overflowId()), Files.getOwner(destination).getName());
Files.delete(destination);
Files.copy(hostFile.toPath(), destination);
assertOwnership(destination, 0, 0, 10000, 11000);
// Set owner + group on both source host file and destination container file
hostFile.setOwnerId(5).setGroupId(10);
new UnixPath(destination).setOwnerId(500).setGroupId(200);
assertOwnership(destination, 500, 200, 10500, 11200);
// Copy the host file to destination again with COPY_ATTRIBUTES and REPLACE_EXISTING
Files.copy(hostFile.toPath(), destination, StandardCopyOption.COPY_ATTRIBUTES, StandardCopyOption.REPLACE_EXISTING);
// The destination is recreated, so the owner should be root
assertOwnership(destination, 0, 0, 10000, 11000);
// Set owner + group and copy within ContainerFS
new UnixPath(destination).setOwnerId(500).setGroupId(200);
ContainerPath destination2 = ContainerPath.fromPathInContainer(containerFs, Path.of("/dest2"));
Files.copy(destination, destination2, StandardCopyOption.COPY_ATTRIBUTES, StandardCopyOption.REPLACE_EXISTING);
assertOwnership(destination2, 500, 200, 10500, 11200);
}
@Test
public void move() throws IOException {
UnixPath hostFile = new UnixPath(fileSystem.getPath("/file")).createNewFile();
ContainerPath destination = ContainerPath.fromPathInContainer(containerFs, Path.of("/dest"));
// If file is moved to JimFS path, the UID/GIDs are not fixed
Files.move(hostFile.toPath(), destination.pathOnHost());
assertEquals(String.valueOf(userNamespace.overflowId()), Files.getOwner(destination).getName());
Files.delete(destination);
hostFile.createNewFile();
Files.move(hostFile.toPath(), destination);
assertOwnership(destination, 0, 0, 10000, 11000);
// Set owner + group on both source host file and destination container file
hostFile.createNewFile();
hostFile.setOwnerId(5).setGroupId(10);
new UnixPath(destination).setOwnerId(500).setGroupId(200);
assertOwnership(destination, 500, 200, 10500, 11200);
// Move the host file to destination again with COPY_ATTRIBUTES and REPLACE_EXISTING
Files.move(hostFile.toPath(), destination, StandardCopyOption.COPY_ATTRIBUTES, StandardCopyOption.REPLACE_EXISTING);
// The destination is recreated, so the owner should be root
assertOwnership(destination, 0, 0, 10000, 11000);
// Set owner + group and move within ContainerFS
new UnixPath(destination).setOwnerId(500).setGroupId(200);
ContainerPath destination2 = ContainerPath.fromPathInContainer(containerFs, Path.of("/dest2"));
Files.move(destination, destination2, StandardCopyOption.COPY_ATTRIBUTES, StandardCopyOption.REPLACE_EXISTING);
assertOwnership(destination2, 500, 200, 10500, 11200);
}
@Test
public void symlink() throws IOException {
ContainerPath source = ContainerPath.fromPathInContainer(containerFs, Path.of("/src"));
// Symlink from ContainerPath to some relative path (different FS provider)
Files.createSymbolicLink(source, fileSystem.getPath("../relative/target"));
assertEquals(fileSystem.getPath("../relative/target"), Files.readSymbolicLink(source));
Files.delete(source);
// Symlinks from ContainerPath to a ContainerPath: Target is resolved within container with base FS provider
Files.createSymbolicLink(source, ContainerPath.fromPathInContainer(containerFs, Path.of("/path/in/container")));
assertEquals(fileSystem.getPath("/path/in/container"), Files.readSymbolicLink(source));
}
private static void assertOwnership(ContainerPath path, int contUid, int contGid, int hostUid, int hostGid) throws IOException {
assertOwnership(path, contUid, contGid);
assertOwnership(path.pathOnHost(), hostUid, hostGid);
}
private static void assertOwnership(Path path, int uid, int gid) throws IOException {
Map<String, Object> attrs = Files.readAttributes(path, "unix:*");
assertEquals(uid, attrs.get("uid"));
assertEquals(gid, attrs.get("gid"));
}
}
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