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container_ip_test.go
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container_ip_test.go
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// Copyright 2024 Harald Albrecht.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package morbyd
import (
"context"
"errors"
"fmt"
"io"
"net"
"net/http"
"time"
"github.com/docker/docker/api/types"
"github.com/docker/docker/api/types/network"
"github.com/thediveo/morbyd/run"
"github.com/thediveo/morbyd/session"
"github.com/thediveo/morbyd/timestamper"
mock "go.uber.org/mock/gomock"
. "github.com/onsi/ginkgo/v2"
. "github.com/onsi/gomega"
. "github.com/thediveo/success"
)
var _ = Describe("getting container IPs", Ordered, func() {
It("returns a container's IP that we can talk to", func(ctx context.Context) {
sess := Successful(NewSession(ctx,
session.WithAutoCleaning("test.morbyd=container.ip")))
DeferCleanup(func(ctx context.Context) {
sess.Close(ctx)
})
if sess.IsDockerDesktop(ctx) {
Skip("not on Docker Desktop")
}
const testnetname = "morbyd-bridge"
netw := Successful(sess.CreateNetwork(ctx, testnetname))
cntr := Successful(sess.Run(ctx, "busybox",
run.WithCommand("/bin/sh", "-c",
"mkdir /www; echo \"Hellorld!\" > /www/index.html; "+
"httpd -v -f -h /www"),
run.WithCombinedOutput(timestamper.New(GinkgoWriter)),
run.WithNetwork(netw.ID)))
By("waiting for container initial process to have started")
Expect(cntr.PID(ctx)).Error().NotTo(HaveOccurred())
By("doing an HTTP exchange with the container")
ip := cntr.IP(ctx)
Expect(ip).NotTo(BeNil())
get := Successful(http.NewRequestWithContext(ctx,
http.MethodGet, fmt.Sprintf("http://%s/", ip), nil))
clnt := &http.Client{Timeout: 5 * time.Second}
resp := Successful(clnt.Do(get))
defer resp.Body.Close()
body := Successful(io.ReadAll(resp.Body))
Expect(string(body)).To(Equal("Hellorld!\n"))
})
It("skips MACVLAN networks as not reachable from the host", func(ctx context.Context) {
ctrl := mock.NewController(GinkgoT())
sess := Successful(NewSession(ctx,
WithMockController(ctrl, "NetworkInspect")))
DeferCleanup(func(ctx context.Context) {
sess.Close(ctx)
})
rec := sess.Client().(*MockClient).EXPECT()
// These should be network IDs as opposed to names, but since these are
// on par, using names makes our mocking more self-descriptive.
rec.NetworkInspect(Any, mock.Eq("mac-wie-lahm"), Any).Return(network.Summary{
Driver: "macvlan",
}, nil)
cntr := &Container{
Session: sess,
Details: types.ContainerJSON{
NetworkSettings: &types.NetworkSettings{
Networks: map[string]*network.EndpointSettings{
"mac-wie-lahm": {
NetworkID: "mac-wie-lahm",
IPAddress: "1.0.1.1",
},
},
},
},
}
Expect(cntr.IP(ctx)).To(BeNil())
})
It("returns a nil IP in case of API errors", func(ctx context.Context) {
ctrl := mock.NewController(GinkgoT())
sess := Successful(NewSession(ctx,
WithMockController(ctrl, "NetworkInspect")))
DeferCleanup(func(ctx context.Context) {
sess.Close(ctx)
})
rec := sess.Client().(*MockClient).EXPECT()
// These should be network IDs as opposed to names, but since these are
// on par, using names makes our mocking more self-descriptive.
rec.NetworkInspect(Any, Any, Any).Return(network.Summary{}, errors.New("error IJK305I"))
cntr := &Container{
Session: sess,
Details: types.ContainerJSON{
NetworkSettings: &types.NetworkSettings{
Networks: map[string]*network.EndpointSettings{
"bridge-over-troubled-data": {
NetworkID: "bridge-over-troubled-data",
IPAddress: "1.0.2.1",
},
},
},
},
}
Expect(cntr.IP(ctx)).To(BeNil())
})
It("returns a nil IP in case of a none (null) network", func(ctx context.Context) {
ctrl := mock.NewController(GinkgoT())
sess := Successful(NewSession(ctx,
WithMockController(ctrl, "NetworkInspect")))
DeferCleanup(func(ctx context.Context) {
sess.Close(ctx)
})
rec := sess.Client().(*MockClient).EXPECT()
// These should be network IDs as opposed to names, but since these are
// on par, using names makes our mocking more self-descriptive.
rec.NetworkInspect(Any, mock.Eq("bubble"), Any).Return(network.Summary{
Driver: "null",
}, nil)
rec.NetworkInspect(Any, mock.Eq("bridged"), Any).MinTimes(0).MaxTimes(1).Return(network.Summary{
Driver: "bridge",
}, nil)
cntr := &Container{
Session: sess,
Details: types.ContainerJSON{
NetworkSettings: &types.NetworkSettings{
Networks: map[string]*network.EndpointSettings{
"none": {
NetworkID: "bubble",
IPAddress: "",
},
"bridged": {
NetworkID: "bridged",
IPAddress: "",
},
},
},
},
}
Expect(cntr.IP(ctx)).To(BeNil())
})
It("returns loopback IP in case of a host network", func(ctx context.Context) {
ctrl := mock.NewController(GinkgoT())
sess := Successful(NewSession(ctx,
WithMockController(ctrl, "NetworkInspect")))
DeferCleanup(func(ctx context.Context) {
sess.Close(ctx)
})
rec := sess.Client().(*MockClient).EXPECT()
// These should be network IDs as opposed to names, but since these are
// on par, using names makes our mocking more self-descriptive.
rec.NetworkInspect(Any, mock.Eq("horscht"), Any).Return(network.Summary{
Driver: "host",
}, nil)
cntr := &Container{
Session: sess,
Details: types.ContainerJSON{
NetworkSettings: &types.NetworkSettings{
Networks: map[string]*network.EndpointSettings{
"host": {
NetworkID: "horscht",
IPAddress: "",
},
},
},
},
}
Expect(cntr.IP(ctx)).To(Equal(net.ParseIP("127.0.0.1")))
})
It("skips a network where we have no IP", func(ctx context.Context) {
ctrl := mock.NewController(GinkgoT())
sess := Successful(NewSession(ctx,
WithMockController(ctrl, "NetworkInspect")))
DeferCleanup(func(ctx context.Context) {
sess.Close(ctx)
})
rec := sess.Client().(*MockClient).EXPECT()
// These should be network IDs as opposed to names, but since these are
// on par, using names makes our mocking more self-descriptive.
rec.NetworkInspect(Any, mock.Eq("bubble"), Any).Return(network.Summary{
Driver: "bridge",
}, nil)
cntr := &Container{
Session: sess,
Details: types.ContainerJSON{
NetworkSettings: &types.NetworkSettings{
Networks: map[string]*network.EndpointSettings{
"bubble": {
NetworkID: "bubble",
IPAddress: "",
},
},
},
},
}
Expect(cntr.IP(ctx)).To(BeNil())
})
})