Examples with HostPolicy org.platformlayer.core.model.HostPolicy used on opensource projects

Example 1 with HostPolicy

use of org.platformlayer.core.model.HostPolicy in project platformlayer by platformlayer.

the class DirectInstanceController method addChildren.

@Override
protected void addChildren() throws OpsException {
    HostPolicy hostPolicy = model.hostPolicy;
    if (hostPolicy == null) {
        hostPolicy = new HostPolicy();
    }
    if (hostPolicy.allowRunInContainer) {
        // TODO: The variable initialization probably doesn't belong here
        LxcInstanceController lxc = injected(LxcInstanceController.class);
        String id = model.getId();
        lxc.id = id;
        lxc.instanceDir = new File(DirectCloudUtils.LXC_BASE_DIR, id);
        lxc.minimumMemoryMB = model.minimumMemoryMb;
        addChild(lxc);
        if (model.publicPorts != null) {
            log.info("Ignoring model.publicPorts: " + model.publicPorts);
        // for (int publicPort : model.publicPorts) {
        // PublicPorts publicPortForward = injected(PublicPorts.class);
        // publicPortForward.publicPort = publicPort;
        // publicPortForward.backendPort = publicPort;
        // publicPortForward.backendItem = model;
        // lxc.addChild(publicPortForward);
        // }
        }
    } else {
        // TODO: The variable initialization probably doesn't belong here
        KvmInstance kvm = injected(KvmInstance.class);
        String id = model.getId();
        kvm.id = id;
        kvm.instanceDir = new File(DirectCloudUtils.KVM_BASE_DIR, id);
        kvm.owner = model.getKey();
        kvm.minimumMemoryMB = model.minimumMemoryMb;
        kvm.recipeId = model.recipeId;
        try {
            kvm.sshPublicKey = OpenSshUtils.readSshPublicKey(model.sshPublicKey);
        } catch (IOException e) {
            throw new OpsException("Error deserializing SSH key", e);
        }
        addChild(kvm);
        // TODO: Remove this... it's only supposed to be a hint
        if (model.publicPorts != null) {
            for (int publicPort : model.publicPorts) {
                throw new UnsupportedOperationException();
            //
            // PublicPorts publicPortForward = injected(PublicPorts.class);
            // publicPortForward.publicPort = publicPort;
            // publicPortForward.backendItem = model;
            // kvm.addChild(publicPortForward);
            }
        }
    }
}

Example 2 with HostPolicy

use of org.platformlayer.core.model.HostPolicy in project platformlayer by platformlayer.

the class ScoreHostPolicy method choose.

@Override
public DirectCloudHost choose(List<DirectCloudHost> candidates) throws OpsException {
    final String sameGroupId;
    if (Strings.isNullOrEmpty(hostPolicy.groupId)) {
        sameGroupId = DEFAULT_GROUP;
    } else {
        sameGroupId = hostPolicy.groupId;
    }
    final ItemType sameItemType;
    if (hostPolicy.scoreSameItemType != 0) {
        PlatformLayerKey owner = findOwner(newInstance);
        if (owner == null) {
            throw new OpsException();
        }
        sameItemType = owner.getItemType();
    } else {
        sameItemType = null;
    }
    List<HostRecord> records = Lists.newArrayList();
    for (DirectCloudHost candidate : candidates) {
        HostRecord record = new HostRecord();
        record.candidate = candidate;
        record.groups = Maps.newHashMap();
        if (hostPolicy.scoreSameItemType != 0) {
            record.owners = Maps.newHashMap();
        }
        records.add(record);
        for (String assigned : candidate.getModel().getTags().findAll(Tag.ASSIGNED)) {
            PlatformLayerKey instanceKey = PlatformLayerKey.parse(assigned);
            // TODO: Avoid 1+N
            DirectInstance instance = platformLayer.getItem(instanceKey);
            if (instance == null) {
                // TODO: Warn?
                throw new IllegalStateException();
            }
            switch(instance.getState()) {
                case DELETE_REQUESTED:
                case DELETED:
                    continue;
            }
            HostPolicy instanceHostPolicy = instance.hostPolicy;
            String instanceGroupId = instanceHostPolicy.groupId;
            if (Strings.isNullOrEmpty(instanceGroupId)) {
                instanceGroupId = DEFAULT_GROUP;
            }
            record.groups.put(instance, instanceGroupId);
            if (sameItemType != null) {
                PlatformLayerKey owner = findOwner(instance);
                if (owner != null) {
                    record.owners.put(instance, owner);
                }
            }
            record.all.add(instance);
        }
    }
    Function<HostRecord, Float> score = new Function<HostRecord, Float>() {

        @Override
        public Float apply(HostRecord record) {
            float score = 0;
            for (DirectInstance instance : record.all) {
                if (sameGroupId != null) {
                    String instanceGroupId = record.groups.get(instance);
                    if (Objects.equal(instanceGroupId, sameGroupId)) {
                        score += hostPolicy.scoreSameGroup;
                    }
                }
                if (sameItemType != null) {
                    PlatformLayerKey owner = record.owners.get(instance);
                    if (owner != null && owner.getItemType().equals(sameItemType)) {
                        score += hostPolicy.scoreSameItemType;
                    }
                }
            }
            // Break ties using least-loaded
            score -= record.all.size() / 1000.0f;
            return score;
        }
    };
    HostRecord bestRecord = ScoreChooser.chooseMax(score).choose(records);
    return bestRecord.candidate;
}

Example 3 with HostPolicy

use of org.platformlayer.core.model.HostPolicy in project platformlayer by platformlayer.

the class DiskImageController method buildImage.

public void buildImage(DiskImage image) throws OpsException, IOException {
    // Assume the worst...
    opsContext.setFailure(true);
    MachineProvider targetCloud = cloudHelpers.getCloud(image.cloud);
    DiskImageRecipe recipe = platformLayer.getItem(image.recipeId, DiskImageRecipe.class);
    OperatingSystem operatingSystem = getRequestedOperatingSystem(recipe);
    String kernelPackage = packageHelpers.getDefaultKernelPackage(operatingSystem);
    String filesystem = "ext3";
    ImageFormat imageFormat = EnumUtils.valueOfCaseInsensitive(ImageFormat.class, image.format);
    boolean buildTar = imageFormat == ImageFormat.Tar;
    // TODO: This logic is not intrinsically correct
    // boolean supportCloudConfigDisk = imageFormat != ImageFormat.DiskQcow2;
    boolean supportCloudConfigDisk = true;
    boolean useConfigDriveSymlinks = false;
    String configDriveLabel = "config";
    List<String> packages = Lists.newArrayList();
    packages.add("openssh-server");
    // Needed for preseeding
    packages.add("debconf-utils");
    if (operatingSystem.getDistribution() == Distribution.Debian) {
        packages.add("locales");
    }
    // We always want some basics available in our images
    packages.add("curl");
    String hostname = "openstack";
    MachineCreationRequest request = new MachineCreationRequest();
    SshKey sshKey = service.getSshKey();
    // There are problems using LXC with debootstrap
    request.hostPolicy = new HostPolicy();
    request.hostPolicy.allowRunInContainer = false;
    // Null means 'use bootstrap image'
    request.recipeId = null;
    request.sshPublicKey = sshKey.getKeyPair().getPublic();
    request.sshPublicKeyName = service.getSshKeyName();
    request.securityGroups = Lists.newArrayList();
    String securityGroup = service.getSecurityGroupName();
    request.securityGroups.add(securityGroup);
    // We don't need a lot of memory to build a disk image (I think!)
    request.minimumMemoryMB = 256;
    Machine machine = cloud.createInstance(request, image.getKey());
    opsContext.takeOwnership(machine);
    machine = waitForAddress(machine);
    OpsTarget target = machine.getTarget(sshKey);
    waitForTarget(target);
    File tempDir = target.createTempDir();
    apt.update(target, true);
    // We need to install curl first so we can detect the performance of our proxies
    // Needed for proxy testing at least
    apt.install(target, "curl");
    CommandEnvironment httpProxyEnv = httpProxies.getHttpProxyEnvironment(target, Usage.SoftwarePackages, null);
    // For now, we assume that this image doesn't have debootstrap pre-installed
    apt.install(target, "debootstrap");
    // For transferring the file to a direct image server
    // debootstrap with LXC seems to have serious problems...
    boolean supportLxc = false;
    if (supportLxc) {
        apt.install(target, "fakechroot", "fakeroot");
    }
    Command command;
    File rootfsDir;
    File imageFile;
    File loopbackPartition = null;
    if (!buildTar) {
        apt.install(target, "mbr");
        apt.install(target, "parted");
        apt.install(target, "kpartx");
        apt.install(target, "extlinux");
        // Same with qemu-kvm
        // (needed for qemu-img convert ... a lot of extra stuff for just the
        // utils!)
        // packageHelpers.getPackageFor("qemu-img", operatingSystem);
        String qemuImgPackage = "qemu-utils";
        apt.install(target, qemuImgPackage);
        // Use local ephemeral storage...
        imageFile = new File(tempDir, "image.raw");
        command = Command.build("dd if=/dev/null bs=1M seek=8180 of={0}", imageFile);
        target.executeCommand(command);
        // Create partitions
        target.executeCommand(Command.build("parted -s {0} mklabel msdos", imageFile));
        target.executeCommand(Command.build("parted -s {0} mkpart primary 0% 100%", imageFile));
        target.executeCommand(Command.build("parted -s {0} set 1 boot on", imageFile));
        // Install Master Boot Record
        target.executeCommand(Command.build("install-mbr {0}", imageFile));
        // Mount the partitions
        // Hopefully it’s loop0p1...
        target.executeCommand(Command.build("modprobe dm-mod"));
        // boolean isMounted = false;
        //
        // {
        // ProcessExecution mountExecution = target.executeCommand(Command.build("mount", imageFile));
        // String stdout = mountExecution.getStdOut();
        // System.out.println(stdout);
        //
        // for (String line : Splitter.on('\n').split(stdout)) {
        // line = line.trim();
        // if (line.isEmpty()) {
        // continue;
        // }
        //
        // List<String> tokens = Lists.newArrayList(Splitter.on(' ').split(line));
        // if (tokens.size() < 3) {
        // throw new IllegalStateException("Cannot parse mount line: " + line);
        // }
        //
        // String mountDir = tokens.get(2);
        // if (mountDir.equals(mntDir.getAbsolutePath())) {
        // isMounted = true;
        // loopbackPartition = new File(tokens.get(0));
        // break;
        // }
        // }
        //
        // // /dev/sda1 on / type ext4 (rw,errors=remount-ro)
        // // tmpfs on /lib/init/rw type tmpfs (rw,nosuid,mode=0755)
        // // proc on /proc type proc (rw,noexec,nosuid,nodev)
        // // sysfs on /sys type sysfs (rw,noexec,nosuid,nodev)
        // // udev on /dev type tmpfs (rw,mode=0755)
        // // tmpfs on /dev/shm type tmpfs (rw,nosuid,nodev)
        // // devpts on /dev/pts type devpts (rw,noexec,nosuid,gid=5,mode=620)
        // // /dev/mapper/loop0p1 on /tmp/8389210e66cd0df6/mnt type ext3 (rw)
        // // proc on /tmp/8389210e66cd0df6/mnt/proc type proc (rw)
        // }
        //
        // if (!isMounted)
        {
            ProcessExecution kpartxExecution = target.executeCommand(Command.build("kpartx -av {0}", imageFile));
            String stdout = kpartxExecution.getStdOut();
            List<String> tokens = Lists.newArrayList(Splitter.on(' ').split(stdout));
            if (tokens.size() != 9) {
                throw new IllegalStateException("Cannot parse kpartx stdout: " + stdout);
            }
            // add map loop6p1 (253:6): 0 16750592 linear /dev/loop6 2048
            String partitionDevice = tokens.get(2);
            if (!partitionDevice.startsWith("loop")) {
                throw new IllegalStateException("kpartx output does not look like a partition: " + stdout);
            }
            loopbackPartition = new File("/dev/mapper/" + partitionDevice);
        }
        // Format filesystem
        command = Command.build("yes | mkfs." + filesystem + " {0}", loopbackPartition);
        command.setTimeout(TimeSpan.FIVE_MINUTES);
        target.executeCommand(command);
        // Get this onto disk now, so we don't delay later commands
        target.executeCommand(Command.build("sync").setTimeout(TimeSpan.FIVE_MINUTES));
        // Don’t force a check based on dates
        target.executeCommand(Command.build("tune2fs -i 0 {0}", loopbackPartition).setTimeout(TimeSpan.FIVE_MINUTES));
        // Get this onto disk now, so we don't delay later commands
        target.executeCommand(Command.build("sync").setTimeout(TimeSpan.FIVE_MINUTES));
        // Mount on mnt/
        File mntDir = new File(tempDir, "mnt");
        target.executeCommand("mkdir {0}", mntDir);
        target.executeCommand(Command.build("mount {0} {1}", loopbackPartition, mntDir).setTimeout(TimeSpan.FIVE_MINUTES));
        rootfsDir = mntDir;
    } else {
        rootfsDir = new File(tempDir, "rootfs");
        imageFile = new File(tempDir, "image.tar.bz2");
    }
    if (buildTar) {
        apt.install(target, "bzip2");
    }
    if (supportLxc) {
        command = Command.build("fakechroot fakeroot debootstrap");
    } else {
        command = Command.build("debootstrap");
    }
    command.addLiteral("--verbose");
    command.addLiteral("--resolve-deps");
    if (supportLxc) {
        // Lxc has problems with mounting etc; fakechroot avoids this
        command.addLiteral("--variant=fakechroot");
    // command.addLiteral("--variant=minbase");
    }
    command.addQuoted("--include=", Joiner.on(",").join(packages));
    command.addLiteral(operatingSystem.getVersion());
    command.addFile(rootfsDir);
    // command.addQuoted(aptSource);
    command.setEnvironment(httpProxyEnv);
    command.setTimeout(TimeSpan.THIRTY_MINUTES);
    try {
        target.executeCommand(command);
    } catch (ProcessExecutionException e) {
        String debootstrapLog = target.readTextFile(new File(rootfsDir, "debootstrap/debootstrap.log"));
        log.warn("Debootstrap log: " + debootstrapLog);
        throw new OpsException("Error running debootstrap", e);
    }
    // TODO: Switch to ChrootOpsTarget, so we can move this stuff into utility functions
    ChrootOpsTarget chrootTarget = new ChrootOpsTarget(rootfsDir, new File("/tmp"), target);
    FileUpload.upload(target, new File(rootfsDir, "etc/hostname"), hostname);
    {
        // Stop services being started in the chroot
        String policy = ResourceUtils.get(getClass(), "usr.sbin.policy-rc.d");
        File policyFile = new File(rootfsDir, "usr/sbin/policy-rc.d");
        FileUpload.upload(target, policyFile, policy);
        target.chmod(policyFile, "755");
    }
    target.executeCommand("mount -t proc proc {0}", new File(rootfsDir, "proc"));
    apt.update(chrootTarget, true);
    target.executeCommand("chroot {0} locale-gen en_US.utf8", rootfsDir);
    target.executeCommand("chroot {0} /bin/bash -c \"DEBIAN_FRONTEND=noninteractive dpkg-reconfigure locales\"", rootfsDir);
    if (!buildTar) {
        {
            File kernelImgConf = new File(rootfsDir, "etc/kernel-img.conf");
            String preseedData = ResourceUtils.get(getClass(), "kernel-img.conf");
            FileUpload.upload(target, kernelImgConf, preseedData);
        }
        {
            File preseedTmpDir = target.createTempDir();
            File preseedFile = new File(preseedTmpDir, "kernel.preseed");
            String preseedData = ResourceUtils.get(getClass(), "kernel.preseed");
            FileUpload.upload(target, preseedFile, preseedData);
            target.executeCommand(Command.build("cat {0} | chroot {1} debconf-set-selections", preseedFile, rootfsDir));
            apt.install(chrootTarget, kernelPackage);
        }
    }
    preconfigurePackages(chrootTarget, recipe.configurePackage);
    if (recipe.repositoryKey != null) {
        addRepositoryKeys(chrootTarget, recipe.repositoryKey);
    }
    if (recipe.repository != null) {
        addRepositories(chrootTarget, recipe.repository);
        apt.update(chrootTarget, true);
    }
    if (recipe.addPackage != null) {
        apt.install(chrootTarget, recipe.addPackage);
        if (recipe.addPackage.contains("jenkins")) {
            // It looks like jenkins doesn't honor policy-rc.d (?)
            // TODO: Fix this monstrosity...
            log.warn("Hard-coding service stop after jenkins installation");
            target.executeCommand(Command.build("chroot {0} /etc/init.d/jenkins stop", rootfsDir));
        }
    }
    apt.upgrade(chrootTarget);
    apt.clean(chrootTarget);
    if (!buildTar) {
        String uuid;
        {
            ProcessExecution uuidExecution = target.executeCommand("blkid -o value -s UUID {0}", loopbackPartition);
            uuid = uuidExecution.getStdOut().trim();
        }
        // Set up /etc/fstab
        String fstab = "# /etc/fstab: static file system information.\n";
        // TODO: Swap
        fstab += "proc\t/proc\tproc\tnodev,noexec,nosuid\t0\t0\n";
        // fstab += "/dev/sda1\t/\t" + filesystem +
        // "\terrors=remount-ro\t0\t1\n";
        fstab += String.format("UUID=%s\t/\t%s\terrors=remount-ro\t0\t1\n", uuid, filesystem);
        if (supportCloudConfigDisk) {
            if (useConfigDriveSymlinks) {
                // Use configuration from cloud_config mount
                target.mkdir(new File(rootfsDir, "media/config"));
                fstab += "/dev/disk/by-label/" + configDriveLabel + "\t/media/config\tudf,iso9660\tro\t0\t0\n";
            }
        }
        FileUpload.upload(target, new File(rootfsDir, "etc/fstab"), fstab);
        log.info("fstab = " + fstab);
        // Set up extlinux
        {
            ProcessExecution kernelExecution = target.executeCommand("chroot {0} find boot/ -name \"vmlinuz-*\"", rootfsDir);
            List<String> kernels = Lists.newArrayList();
            for (String kernel : kernelExecution.getStdOut().split("\n")) {
                kernel = kernel.trim();
                if (kernel.isEmpty()) {
                    continue;
                }
                kernels.add(kernel);
            }
            if (kernels.size() > 1) {
                throw new IllegalStateException("Multiple kernels found");
            } else if (kernels.size() != 1) {
                throw new IllegalStateException("No kernels found");
            }
            ProcessExecution initrdExecution = target.executeCommand("chroot {0} find boot/ -name \"initrd*\"", rootfsDir);
            List<String> initrds = Lists.newArrayList();
            for (String initrd : initrdExecution.getStdOut().split("\n")) {
                initrd = initrd.trim();
                if (initrd.isEmpty()) {
                    continue;
                }
                if (initrd.endsWith(".bak")) {
                    continue;
                }
                initrds.add(initrd);
            }
            if (initrds.size() > 1) {
                throw new IllegalStateException("Multiple initrds found");
            } else if (initrds.size() != 1) {
                throw new IllegalStateException("No initrds found");
            }
            String conf = String.format("default linux\ntimeout 1\n\nlabel linux\nkernel %s\nappend initrd=%s root=UUID=%s ro quiet", kernels.get(0), initrds.get(0), uuid);
            FileUpload.upload(target, new File(rootfsDir, "extlinux.conf"), conf);
            log.info("extlinux.conf = " + conf);
        }
        target.executeCommand(Command.build("extlinux --install  {0}", rootfsDir).setTimeout(TimeSpan.FIVE_MINUTES));
    }
    if (supportCloudConfigDisk) {
        if (useConfigDriveSymlinks) {
            target.rm(new File(rootfsDir, "etc/network/interfaces"));
            target.executeCommand("ln -s /media/config/etc/network/interfaces {0}", new File(rootfsDir, "etc/network/interfaces"));
            target.mkdir(new File(rootfsDir, "root/.ssh"));
            target.executeCommand("ln -s /media/config/root/.ssh/authorized_keys {0}", new File(rootfsDir, "root/.ssh/authorized_keys"));
        } else {
            String initScript = ResourceUtils.get(getClass(), "openstack-config");
            File initScriptFile = new File(rootfsDir, "etc/init.d/openstack-config");
            FileUpload.upload(target, initScriptFile, initScript);
            target.executeCommand("chmod +x {0}", initScriptFile);
            chrootTarget.executeCommand("/usr/sbin/update-rc.d openstack-config defaults");
        }
    }
    {
        // Remove policy file
        File policyFile = new File(rootfsDir, "usr/sbin/policy-rc.d");
        target.rm(policyFile);
    }
    target.executeCommand("sync");
    target.executeCommand("umount {0}", new File(rootfsDir, "proc"));
    if (!buildTar) {
        target.executeCommand("sync");
        target.executeCommand("umount {0}", rootfsDir);
        target.executeCommand("sync");
        target.executeCommand("kpartx -d {0}", imageFile);
        target.executeCommand("sync");
    }
    if (buildTar) {
        Command compress = Command.build("cd {0}; tar jcf {1} .", rootfsDir, imageFile);
        target.executeCommand(compress.setTimeout(TimeSpan.FIFTEEN_MINUTES));
    }
    FilesystemInfo imageInfo = target.getFilesystemInfoFile(imageFile);
    File uploadImageFile;
    if (!buildTar) {
        boolean isQcow2 = imageFormat == ImageFormat.DiskQcow2;
        if (isQcow2) {
            // We create the image as a raw image (making use of sparse files)
            // and then convert it to qcow2. This is a little less efficient, but
            // has a few advantages...
            // 1) We can support different formats
            // 2) The final image is defragmented
            // 3) Mounting a qcow2 image (or other image formats) is tricky vs
            // loopback mount
            uploadImageFile = new File(imageFile.getParentFile(), "image.qcow2");
            command = Command.build("qemu-img convert -f raw -O qcow2 {0} {1}", imageFile, uploadImageFile);
            command.setTimeout(TimeSpan.THIRTY_MINUTES);
            target.executeCommand(command);
        } else {
            uploadImageFile = new File(imageFile.getParentFile(), "image.raw.gz");
            command = Command.build("gzip -c --best {0} > {1}", imageFile, uploadImageFile);
            command.setTimeout(TimeSpan.THIRTY_MINUTES);
            target.executeCommand(command);
        }
    } else {
        uploadImageFile = imageFile;
    }
    String imageId;
    // Upload & tag the image with the recipe ID
    {
        Tags tags = new Tags();
        tags.add(Tag.buildParentTag(recipe.getKey()));
        tags.add(imageFormat.toTag());
        imageId = cloud.getImageStore(targetCloud).uploadImage(target, tags, uploadImageFile, imageInfo.size);
    }
    // Tag the recipe with the image ID
    {
        TagChanges tagChanges = new TagChanges();
        tagChanges.addTags.add(Tag.IMAGE_ID.build(imageId));
        platformLayer.changeTags(image.getKey(), tagChanges);
    }
    // Our pessimism proved unfounded...
    opsContext.setFailure(false);
}

Example 4 with HostPolicy

use of org.platformlayer.core.model.HostPolicy in project platformlayer by platformlayer.

the class ScoreHostPolicy method build.

public static ScoreHostPolicy build(HostPolicy hostPolicy, DirectInstance newInstance) {
    if (hostPolicy == null) {
        hostPolicy = new HostPolicy();
    }
    ScoreHostPolicy chooser = Injection.getInstance(ScoreHostPolicy.class);
    chooser.hostPolicy = hostPolicy;
    chooser.newInstance = newInstance;
    return chooser;
}

Example 5 with HostPolicy

use of org.platformlayer.core.model.HostPolicy in project platformlayer by platformlayer.

the class SpreadChooser method choose.

@Override
public DirectCloudHost choose(List<DirectCloudHost> candidates) throws OpsException {
    List<HostRecord> records = Lists.newArrayList();
    for (DirectCloudHost candidate : candidates) {
        HostRecord record = new HostRecord();
        record.candidate = candidate;
        records.add(record);
        for (String assigned : candidate.getModel().getTags().findAll(Tag.ASSIGNED)) {
            PlatformLayerKey instanceKey = PlatformLayerKey.parse(assigned);
            // TODO: Avoid 1+N
            DirectInstance instance = platformLayer.getItem(instanceKey);
            if (instance == null) {
                // TODO: Warn?
                throw new IllegalStateException();
            }
            switch(instance.getState()) {
                case DELETE_REQUESTED:
                case DELETED:
                    continue;
            }
            HostPolicy hostPolicy = instance.hostPolicy;
            if (Objects.equal(groupId, hostPolicy.groupId)) {
                record.matchingPolicy.add(instance);
            }
            record.all.add(instance);
        }
    }
    Function<HostRecord, Float> score = new Function<HostRecord, Float>() {

        @Override
        public Float apply(HostRecord input) {
            // Lower score is better
            float score = input.matchingPolicy.size();
            // For breaking ties
            score += input.all.size() / 100000.0;
            return score;
        }
    };
    HostRecord bestRecord = ScoreChooser.chooseMin(score).choose(records);
    return bestRecord.candidate;
}