balena-supervisor/test/lib/mockerode.ts

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import * as dockerode from 'dockerode';
import * as sinon from 'sinon';
// Recursively convert properties of an object as optional
type DeepPartial<T> = {
[P in keyof T]?: T[P] extends Array<infer U>
? Array<DeepPartial<U>>
: T[P] extends object
? DeepPartial<T[P]>
: T[P];
};
// Partial container inspect info for receiving as testing data
export type PartialContainerInspectInfo =
DeepPartial<dockerode.ContainerInspectInfo> & {
Id: string;
};
export type PartialNetworkInspectInfo =
DeepPartial<dockerode.NetworkInspectInfo> & {
Id: string;
};
export type PartialVolumeInspectInfo =
DeepPartial<dockerode.VolumeInspectInfo> & {
Name: string;
};
export type PartialImageInspectInfo =
DeepPartial<dockerode.ImageInspectInfo> & {
Id: string;
};
type Methods<T> = {
[K in keyof T]: T[K] extends (...args: any) => any ? T[K] : never;
};
function createFake<Prototype extends object>(prototype: Prototype) {
return (Object.getOwnPropertyNames(prototype) as Array<keyof Prototype>)
.filter((fn) => fn === 'constructor' || typeof prototype[fn] === 'function')
.reduce(
(res, fn) => ({
...res,
[fn]: () => {
throw Error(
`Fake method not implemented: ${
prototype.constructor.name
}.${fn.toString()}()`,
);
},
}),
{} as Methods<Prototype>,
);
}
export function createNetwork(network: PartialNetworkInspectInfo) {
const { Id, ...networkInspect } = network;
const inspectInfo = {
Id,
Name: 'default',
Created: '2015-01-06T15:47:31.485331387Z',
Scope: 'local',
Driver: 'bridge',
EnableIPv6: false,
Internal: false,
Attachable: true,
Ingress: false,
IPAM: {
Driver: 'default',
Options: {},
Config: [
{
Subnet: '172.18.0.0/16',
Gateway: '172.18.0.1',
},
],
},
Containers: {},
Options: {},
Labels: {},
ConfigOnly: false,
// Add defaults
...networkInspect,
};
const fakeNetwork = createFake(dockerode.Network.prototype);
return {
...fakeNetwork, // by default all methods fail unless overriden
id: Id,
inspectInfo,
inspect: () => Promise.resolve(inspectInfo),
remove: (): Promise<boolean> =>
Promise.reject('Mock network not attached to an engine'),
};
}
export type MockNetwork = ReturnType<typeof createNetwork>;
export function createContainer(container: PartialContainerInspectInfo) {
const createContainerInspectInfo = (
partial: PartialContainerInspectInfo,
): dockerode.ContainerInspectInfo => {
const {
Id,
State,
Config,
NetworkSettings,
HostConfig,
Mounts,
...ContainerInfo
} = partial;
return {
Id,
Created: '2015-01-06T15:47:31.485331387Z',
Path: '/usr/bin/sleep',
Args: ['infinity'],
State: {
Status: 'running',
ExitCode: 0,
Running: true,
Paused: false,
Restarting: false,
OOMKilled: false,
...State, // User passed options
},
Image: 'deadbeef',
Name: 'main',
HostConfig: {
AutoRemove: false,
Binds: [],
LogConfig: {
Type: 'journald',
Config: {},
},
NetworkMode: 'bridge',
PortBindings: {},
RestartPolicy: {
Name: 'always',
MaximumRetryCount: 0,
},
VolumeDriver: '',
CapAdd: [],
CapDrop: [],
Dns: [],
DnsOptions: [],
DnsSearch: [],
ExtraHosts: [],
GroupAdd: [],
IpcMode: 'shareable',
Privileged: false,
SecurityOpt: [],
ShmSize: 67108864,
Memory: 0,
MemoryReservation: 0,
OomKillDisable: false,
Devices: [],
Ulimits: [],
...HostConfig, // User passed options
},
Config: {
Hostname: Id,
Labels: {},
Cmd: ['/usr/bin/sleep', 'infinity'],
Env: [] as string[],
Volumes: {},
Image: 'alpine:latest',
...Config, // User passed options
},
NetworkSettings: {
Networks: {
default: {
Aliases: [],
Gateway: '172.18.0.1',
IPAddress: '172.18.0.2',
IPPrefixLen: 16,
MacAddress: '00:00:de:ad:be:ef',
},
},
...NetworkSettings, // User passed options
},
Mounts: [
...(Mounts || []).map(({ Name, ...opts }) => ({
Name,
Type: 'volume',
Source: `/var/lib/docker/volumes/${Name}/_data`,
Destination: '/opt/${Name}/path',
Driver: 'local',
Mode: '',
RW: true,
Propagation: '',
// Replace defaults
...opts,
})),
],
...ContainerInfo,
} as dockerode.ContainerInspectInfo;
};
const createContainerInfo = (
containerInspectInfo: dockerode.ContainerInspectInfo,
): dockerode.ContainerInfo => {
const {
Id,
Name,
Created,
Image,
State,
HostConfig,
Config,
Mounts,
NetworkSettings,
} = containerInspectInfo;
const capitalizeFirst = (s: string) =>
s.charAt(0).toUpperCase() + s.slice(1);
// Calculate summary from existing inspectInfo object
return {
Id,
Names: [Name],
ImageID: Image,
Image: Config.Image,
Created: Date.parse(Created),
Command: Config.Cmd.join(' '),
State: capitalizeFirst(State.Status),
Status: `Exit ${State.ExitCode}`,
HostConfig: {
NetworkMode: HostConfig.NetworkMode!,
},
Ports: [],
Labels: Config.Labels,
NetworkSettings: {
Networks: NetworkSettings.Networks,
},
Mounts: Mounts as dockerode.ContainerInfo['Mounts'],
};
};
const inspectInfo = createContainerInspectInfo(container);
const info = createContainerInfo(inspectInfo);
const { Id: id } = inspectInfo;
const fakeContainer = createFake(dockerode.Container.prototype);
return {
...fakeContainer, // by default all methods fail unless overriden
id,
inspectInfo,
info,
inspect: () => Promise.resolve(inspectInfo),
remove: (): Promise<boolean> =>
Promise.reject('Mock container not attached to an engine'),
};
}
export type MockContainer = ReturnType<typeof createContainer>;
interface Reference {
repository: string;
tag?: string;
digest?: string;
toString: () => string;
}
const parseReference = (uri: string): Reference => {
// https://github.com/docker/distribution/blob/release/2.7/reference/normalize.go#L62
// https://github.com/docker/distribution/blob/release/2.7/reference/regexp.go#L44
const match = uri.match(
/^(?:(localhost|.*?[.:].*?)\/)?(.+?)(?::(.*?))?(?:@(.*?))?$/,
);
if (!match) {
throw new Error(`Could not parse the image: ${uri}`);
}
const [, registry, imageName, tagName, digest] = match;
let tag = tagName;
if (!digest && !tag) {
tag = 'latest';
}
const digestMatch = digest?.match(
/^[A-Za-z][A-Za-z0-9]*(?:[-_+.][A-Za-z][A-Za-z0-9]*)*:[0-9a-f-A-F]{32,}$/,
);
if (!imageName || (digest && !digestMatch)) {
throw new Error(
'Invalid image name, expected [domain.tld/]repo/image[:tag][@digest] format',
);
}
const repository = [registry, imageName].filter((s) => !!s).join('/');
return {
repository,
tag,
digest,
toString: () =>
repository +
(tagName ? `:${tagName}` : '') +
(digest ? `@${digest}` : ''),
};
};
export function createImage(
// Do not allow RepoTags or RepoDigests to be provided.
// References must be used instead
image: Omit<PartialImageInspectInfo, 'RepoTags' | 'RepoDigests'>,
{ References = [] as string[] } = {},
) {
const createImageInspectInfo = (
partialImage: PartialImageInspectInfo,
): dockerode.ImageInspectInfo => {
const { Id, ContainerConfig, Config, GraphDriver, RootFS, ...Info } =
partialImage;
return {
Id,
RepoTags: [],
RepoDigests: [
'registry2.resin.io/v2/8ddbe4a22e881f06def0f31400bfb6de@sha256:09b0db9e71cead5f91107fc9254b1af7088444cc6da55afa2da595940f72a34a',
],
Parent: '',
Comment: 'Not a real image',
Created: '2018-08-15T12:43:06.43392045Z',
Container:
'b6cc9227f272b905512a58926b6d515b38de34b604386031aa3c21e94d9dbb4a',
ContainerConfig: {
Hostname: 'f15babe8256c',
Domainname: '',
User: '',
AttachStdin: false,
AttachStdout: false,
AttachStderr: false,
Tty: false,
OpenStdin: false,
StdinOnce: false,
Env: [
'PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin',
],
Cmd: ['/usr/bin/sleep', 'infinity'],
ArgsEscaped: true,
Image:
'sha256:828d725f5e6d09ee9abc214f6c11fadf69192ba4871b050984cc9c4cec37b208',
Volumes: {},
WorkingDir: '',
Entrypoint: null,
OnBuild: null,
Labels: {},
...ContainerConfig,
} as dockerode.ImageInspectInfo['ContainerConfig'],
DockerVersion: '17.05.0-ce',
Author: '',
Config: {
Hostname: '',
Domainname: '',
User: '',
AttachStdin: false,
AttachStdout: false,
AttachStderr: false,
Tty: false,
OpenStdin: false,
StdinOnce: false,
Env: [
'PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin',
],
Cmd: ['/usr/bin/sleep', 'infinity'],
ArgsEscaped: true,
Image:
'sha256:828d725f5e6d09ee9abc214f6c11fadf69192ba4871b050984cc9c4cec37b208',
Volumes: {},
WorkingDir: '/usr/src/app',
Entrypoint: ['/usr/bin/entry.sh'],
OnBuild: [],
Labels: {
...(Config?.Labels ?? {}),
},
...Config,
} as dockerode.ImageInspectInfo['Config'],
Architecture: 'arm64',
Os: 'linux',
Size: 38692178,
VirtualSize: 38692178,
GraphDriver: {
Data: {
DeviceId: 'deadbeef',
DeviceName: 'dummy',
DeviceSize: '10m',
},
Name: 'aufs',
...GraphDriver,
} as dockerode.ImageInspectInfo['GraphDriver'],
RootFS: {
Type: 'layers',
Layers: [
'sha256:7c30ac6ce381873d5388b7d23b346af7d1e5f6af000a84b97e6203ed9e6dcab2',
'sha256:450b73019ae79e6a99774fcd37c18769f95065c8b271be936dfb3f93afadc4a8',
'sha256:6ab67aaf666bfb7001ab93deffe785f24775f4e0da3d6d421ad6096ba869fd0d',
],
...RootFS,
} as dockerode.ImageInspectInfo['RootFS'],
...Info,
};
};
const createImageInfo = (imageInspectInfo: dockerode.ImageInspectInfo) => {
const {
Id,
Parent: ParentId,
RepoTags,
RepoDigests,
Config,
} = imageInspectInfo;
const { Labels } = Config;
return {
Id,
ParentId,
RepoTags,
RepoDigests,
Created: 1474925151,
Size: 103579269,
VirtualSize: 103579269,
SharedSize: 0,
Labels,
Containers: 0,
};
};
const references = References.map((uri) => parseReference(uri));
// Generate image repo tags and digests for inspect
const { tags, digests } = references.reduce(
(pairs, ref) => {
if (ref.tag) {
pairs.tags.push([ref.repository, ref.tag].join(':'));
}
if (ref.digest) {
pairs.digests.push([ref.repository, ref.digest].join('@'));
}
return pairs;
},
{ tags: [] as string[], digests: [] as string[] },
);
const inspectInfo = createImageInspectInfo({
...image,
// Use references to fill RepoTags and RepoDigests ignoring
// those from the partial inspect info
RepoTags: [...new Set([...tags])],
RepoDigests: [...new Set([...digests])],
});
const info = createImageInfo(inspectInfo);
const { Id: id } = inspectInfo;
const fakeImage = createFake(dockerode.Image.prototype);
return {
...fakeImage, // by default all methods fail unless overriden
id,
info,
inspectInfo,
references,
inspect: () => Promise.resolve(inspectInfo),
remove: (_opts: any): Promise<boolean> =>
Promise.reject('Mock image not attached to an engine'),
};
}
export type MockImage = ReturnType<typeof createImage>;
export function createVolume(volume: PartialVolumeInspectInfo) {
const { Name, Labels, ...partialVolumeInfo } = volume;
const inspectInfo: dockerode.VolumeInspectInfo = {
Name,
Driver: 'local',
Mountpoint: '/var/lib/docker/volumes/resin-data',
Labels: {
...Labels,
} as dockerode.VolumeInspectInfo['Labels'],
Scope: 'local',
Options: {},
...partialVolumeInfo,
};
const fakeVolume = createFake(dockerode.Volume.prototype);
return {
...fakeVolume, // by default all methods fail unless overriden
name: Name,
inspectInfo,
inspect: () => Promise.resolve(inspectInfo),
remove: (): Promise<boolean> =>
Promise.reject('Mock volume not attached to an engine'),
};
}
export type MockVolume = ReturnType<typeof createVolume>;
export type MockEngineState = {
containers?: MockContainer[];
networks?: MockNetwork[];
volumes?: MockVolume[];
images?: MockImage[];
};
// Good enough function go generate ids for mock engine
// source: https://stackoverflow.com/a/2117523
function uuidv4() {
return 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx'.replace(/[xy]/g, function (c) {
// tslint:disable
const r = (Math.random() * 16) | 0,
v = c == 'x' ? r : (r & 0x3) | 0x8;
return v.toString(16);
});
}
type Stubs<T> = {
[K in keyof T]: T[K] extends (...args: infer TArgs) => infer TReturnValue
? sinon.SinonStub<TArgs, TReturnValue>
: never;
};
export class MockEngine {
networks: Dictionary<MockNetwork> = {};
containers: Dictionary<MockContainer> = {};
images: Dictionary<MockImage> = {};
volumes: Dictionary<MockVolume> = {};
constructor({
networks = [],
containers = [],
images = [],
volumes = [],
}: MockEngineState) {
// Key networks by id
this.networks = networks.reduce((networkMap, network) => {
const { id } = network;
return {
...networkMap,
[id]: { ...network, remove: () => this.removeNetwork(id) },
};
}, {});
this.containers = containers.reduce((containerMap, container) => {
const { id } = container;
return {
...containerMap,
[id]: {
...container,
remove: () => this.removeContainer(id),
},
};
}, {});
this.images = images.reduce((imageMap, image) => {
const { id } = image;
return {
...imageMap,
[id]: {
...image,
remove: (options: any) => this.removeImage(id, options),
},
};
}, {});
this.volumes = volumes.reduce((volumeMap, volume) => {
const { name } = volume;
return {
...volumeMap,
[name]: {
...volume,
remove: () => this.removeVolume(name),
},
};
}, {});
}
getNetwork(id: string) {
const network = Object.values(this.networks).find(
(n) => n.inspectInfo.Id === id || n.inspectInfo.Name === id,
);
if (!network) {
return {
id,
inspect: () =>
Promise.reject({ statusCode: 404, message: `No such network ${id}` }),
remove: () =>
Promise.reject({ statusCode: 404, message: `No such network ${id}` }),
} as MockNetwork;
}
return network;
}
listNetworks() {
return Promise.resolve(
Object.values(this.networks).map((network) => network.inspectInfo),
);
}
removeNetwork(id: string) {
const network = Object.values(this.networks).find(
(n) => n.inspectInfo.Id === id || n.inspectInfo.Name === id,
);
// Throw an error if the network does not exist
// this should never happen
if (!network) {
return Promise.reject({
statusCode: 404,
message: `No such network ${id}`,
});
}
return Promise.resolve(delete this.networks[network.id]);
}
createNetwork(options: dockerode.NetworkCreateOptions) {
const Id = uuidv4();
const network = createNetwork({ Id, ...options });
// Add to the list
this.networks[Id] = network;
}
listContainers() {
return Promise.resolve(
// List containers returns ContainerInfo objects so we return summaries
Object.values(this.containers).map((container) => container.info),
);
}
createContainer(options: dockerode.ContainerCreateOptions) {
const Id = uuidv4();
const { name: Name, HostConfig, NetworkingConfig, ...Config } = options;
const container = createContainer({
Id,
Name,
HostConfig,
Config,
NetworkSettings: { Networks: NetworkingConfig?.EndpointsConfig ?? {} },
State: { Status: 'created' },
});
// Add to the list
this.containers[Id] = {
...container,
remove: () => this.removeContainer(Id),
};
}
getContainer(id: string) {
const container = Object.values(this.containers).find(
(c) => c.inspectInfo.Id === id || c.inspectInfo.Name === id,
);
if (!container) {
return {
id,
inspect: () =>
Promise.reject({
statusCode: 404,
message: `No such container ${id}`,
}),
} as MockContainer;
}
return { ...container, remove: () => this.removeContainer(id) };
}
removeContainer(id: string) {
const container = Object.values(this.containers).find(
(c) => c.inspectInfo.Id === id || c.inspectInfo.Name === id,
);
// Throw an error if the container does not exist
// this should never happen
if (!container) {
return Promise.reject({
statusCode: 404,
message: `No such container ${id}`,
});
}
return Promise.resolve(delete this.containers[container.id]);
}
listImages({ filters = { reference: [] as string[] } } = {}) {
const filterList = [] as ((img: MockImage) => boolean)[];
const transformers = [] as ((img: MockImage) => MockImage)[];
// Add reference filters
if (filters.reference?.length > 0) {
const isMatchingReference = ({ repository, tag }: Reference) =>
filters.reference.includes(repository) ||
filters.reference.includes(
[repository, tag].filter((s) => !!s).join(':'),
);
// Create a filter for images matching the reference
filterList.push((img) => img.references.some(isMatchingReference));
// Create a transformer removing unused references from the image
transformers.push((img) =>
createImage(img.inspectInfo, {
References: img.references
.filter(isMatchingReference)
.map((ref) => ref.toString()),
}),
);
}
return Promise.resolve(
Object.values(this.images)
// Remove images that do not match the filter
.filter((img) => filterList.every((fn) => fn(img)))
// Transform the image if needed
.map((image) => transformers.reduce((img, next) => next(img), image))
.map((image) => image.info),
);
}
getVolume(name: string) {
const volume = Object.values(this.volumes).find((v) => v.name === name);
if (!volume) {
return {
name,
inspect: () =>
Promise.reject({
statusCode: 404,
message: `No such volume ${name}`,
}),
remove: () =>
Promise.reject({
statusCode: 404,
message: `No such volume ${name}`,
}),
};
}
return volume;
}
listVolumes() {
return Promise.resolve({
Volumes: Object.values(this.volumes).map((volume) => volume.inspectInfo),
Warnings: [] as string[],
});
}
removeVolume(name: string) {
return Promise.resolve(delete this.volumes[name]);
}
createVolume(options: PartialVolumeInspectInfo) {
const { Name } = options;
const volume = createVolume(options);
// Add to the list
this.volumes[Name] = volume;
}
// NOT a dockerode method
// Implements this https://docs.docker.com/engine/reference/commandline/rmi/
// Removes (and un-tags) one or more images from the host node.
// If an image has multiple tags, using this command with the tag as
// a parameter only removes the tag. If the tag is the only one for the image,
// both the image and the tag are removed.
// Does not remove images from a registry.
// You cannot remove an image of a running container unless you use the
// -f option. To see all images on a host use the docker image ls command.
//
// You can remove an image using its short or long ID, its tag, or its digest.
// If an image has one or more tags referencing it, you must remove all of them
// before the image is removed. Digest references are removed automatically when
// an image is removed by tag.
removeImage(name: string, { force } = { force: false }) {
const image = this.findImage(name);
// Throw an error if the image does not exist
if (!image) {
return Promise.reject({
statusCode: 404,
message: `No such image ${name}`,
});
}
// Get the id of the iamge
const { Id: id } = image.inspectInfo;
// If the given identifier is an id
if (id === name) {
if (!force && image.references.length > 1) {
// If the name is an id and there are multiple tags
// or digests referencing the image, don't delete unless the force option
return Promise.reject({
statusCode: 409,
message: `Unable to delete image ${name} with multiple references`,
});
}
return Promise.resolve(delete this.images[id]);
}
// If the name is not an id, then it must be a reference
const ref = parseReference(name);
const References = image.references
.filter(
(r) =>
r.repository !== ref.repository ||
(r.digest !== ref.digest && r.tag !== ref.tag),
)
.map((r) => r.toString());
if (References.length > 0) {
// If there are still digests or tags, just update the stored image
this.images[id] = {
...createImage(image.inspectInfo, { References }),
remove: (options: any) => this.removeImage(id, options),
};
return Promise.resolve(true);
}
// Remove the original image
return Promise.resolve(delete this.images[id]);
}
private findImage(name: string) {
if (this.images[name]) {
return this.images[name];
}
// If the identifier is not an id it must be a reference
const ref = parseReference(name);
return Object.values(this.images).find((img) =>
img.references.some(
(r) =>
// Find an image that has a reference with matching digest or tag
r.repository === ref.repository &&
(r.digest === ref.digest || r.tag === ref.tag),
),
);
}
getImage(name: string) {
const image = this.findImage(name);
// If the image doesn't exist return an empty object
if (!image) {
return {
id: name,
inspect: () =>
Promise.reject({ statusCode: 404, message: `No such image ${name}` }),
remove: () =>
Promise.reject({ statusCode: 404, message: `No such image ${name}` }),
};
}
return {
...image,
remove: (options: any) => this.removeImage(name, options),
};
}
getEvents() {
console.log(`Calling mockerode.getEvents 🐳`);
return Promise.resolve({ on: () => void 0, pipe: () => void 0 });
}
}
export function createMockerode(engine: MockEngine) {
const dockerodeStubs: Stubs<dockerode> = (
Object.getOwnPropertyNames(dockerode.prototype) as (keyof dockerode)[]
)
.filter((fn) => typeof dockerode.prototype[fn] === 'function')
.reduce((stubMap, fn) => {
const stub = sinon.stub(dockerode.prototype, fn);
if (MockEngine.prototype.hasOwnProperty(fn)) {
stub.callsFake((MockEngine.prototype as any)[fn].bind(engine));
} else {
// By default all unimplemented methods will throw to avoid the tests
// silently failing
stub.throws(`Not implemented: Dockerode.${fn}`);
}
return { ...stubMap, [fn]: stub };
}, {} as Stubs<dockerode>);
const { removeImage, removeNetwork, removeVolume, removeContainer } = engine;
// Add stubs to additional engine methods we want to
// be able to check
const mockEngineStubs = {
removeImage: sinon
.stub(engine, 'removeImage')
.callsFake(removeImage.bind(engine)),
removeNetwork: sinon
.stub(engine, 'removeNetwork')
.callsFake(removeNetwork.bind(engine)),
removeVolume: sinon
.stub(engine, 'removeVolume')
.callsFake(removeVolume.bind(engine)),
removeContainer: sinon
.stub(engine, 'removeContainer')
.callsFake(removeContainer.bind(engine)),
};
return {
...dockerodeStubs,
...mockEngineStubs,
restore: () => {
Object.values(dockerodeStubs).forEach((stub) => stub.restore());
Object.values(mockEngineStubs).forEach((spy) => spy.restore());
},
resetHistory: () => {
Object.values(dockerodeStubs).forEach((stub) => stub.resetHistory());
Object.values(mockEngineStubs).forEach((spy) => spy.resetHistory());
},
};
}
export type Mockerode = ReturnType<typeof createMockerode>;
export async function withMockerode(
test: (dockerode: Mockerode) => Promise<any>,
initialState: MockEngineState = {
containers: [],
networks: [],
volumes: [],
images: [],
},
) {
const mockEngine = new MockEngine(initialState);
const mockerode = createMockerode(mockEngine);
try {
// run the tests
await test(mockerode);
} finally {
// restore stubs always
mockerode.restore();
}
}