114 lines
2.9 KiB
Go
114 lines
2.9 KiB
Go
// Copyright 2020 The gVisor Authors.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package dockerutil
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import (
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"context"
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"net"
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"github.com/docker/docker/api/types"
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"github.com/docker/docker/api/types/network"
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"github.com/docker/docker/client"
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"gvisor.dev/gvisor/pkg/test/testutil"
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)
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// Network is a docker network.
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type Network struct {
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client *client.Client
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id string
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logger testutil.Logger
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Name string
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containers []*Container
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Subnet *net.IPNet
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}
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// NewNetwork sets up the struct for a Docker network. Names of networks
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// will be unique.
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func NewNetwork(ctx context.Context, logger testutil.Logger) *Network {
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client, err := client.NewClientWithOpts(client.FromEnv)
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if err != nil {
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logger.Logf("create client failed with: %v", err)
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return nil
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}
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client.NegotiateAPIVersion(ctx)
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return &Network{
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logger: logger,
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Name: testutil.RandomID(logger.Name()),
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client: client,
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}
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}
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func (n *Network) networkCreate() types.NetworkCreate {
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var subnet string
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if n.Subnet != nil {
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subnet = n.Subnet.String()
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}
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ipam := network.IPAM{
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Config: []network.IPAMConfig{{
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Subnet: subnet,
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}},
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}
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return types.NetworkCreate{
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CheckDuplicate: true,
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IPAM: &ipam,
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}
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}
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// Create is analogous to 'docker network create'.
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func (n *Network) Create(ctx context.Context) error {
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opts := n.networkCreate()
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resp, err := n.client.NetworkCreate(ctx, n.Name, opts)
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if err != nil {
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return err
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}
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n.id = resp.ID
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return nil
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}
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// Connect is analogous to 'docker network connect' with the arguments provided.
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func (n *Network) Connect(ctx context.Context, container *Container, ipv4, ipv6 string) error {
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settings := network.EndpointSettings{
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IPAMConfig: &network.EndpointIPAMConfig{
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IPv4Address: ipv4,
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IPv6Address: ipv6,
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},
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}
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err := n.client.NetworkConnect(ctx, n.id, container.id, &settings)
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if err == nil {
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n.containers = append(n.containers, container)
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}
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return err
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}
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// Inspect returns this network's info.
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func (n *Network) Inspect(ctx context.Context) (types.NetworkResource, error) {
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return n.client.NetworkInspect(ctx, n.id, types.NetworkInspectOptions{Verbose: true})
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}
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// Cleanup cleans up the docker network and all the containers attached to it.
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func (n *Network) Cleanup(ctx context.Context) error {
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for _, c := range n.containers {
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c.CleanUp(ctx)
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}
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n.containers = nil
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return n.client.NetworkRemove(ctx, n.id)
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}
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