Context("when the netns path is invalid", func() {
BeforeEach(func() {
var err error
netNsFd, err = ioutil.TempFile("", "")
Expect(err).NotTo(HaveOccurred())
})
It("returns the error", func() {
err := configurer.Apply(logger, networkConfig, 42)
Expect(err).To(MatchError(ContainSubstring("set netns")))
})
})
Context("when the container interface does not exist", func() {
BeforeEach(func() {
networkConfig.ContainerIntf = "not-a-link"
})
It("returns the error", func() {
err := configurer.Apply(logger, networkConfig, 42)
Expect(err).To(MatchError("interface `not-a-link` was not found"))
})
})
})
func linkIP(netNsName, linkName string) string {
cmd := exec.Command("ip", "netns", "exec", netNsName, "ifconfig", linkName)
buffer := gbytes.NewBuffer()
sess, err := gexec.Start(cmd, buffer, GinkgoWriter)
Expect(err).NotTo(HaveOccurred())
if name == "bridge" {
return existingBridge, true, nil
}
return nil, false, nil
}
})
AfterEach(func() {
Expect(os.Remove(netnsFD.Name())).To(Succeed())
})
It("creates a virtual ethernet pair", func() {
config.HostIntf = "host"
config.BridgeName = "bridge"
config.ContainerIntf = "container"
Expect(configurer.Apply(logger, config, 42)).To(Succeed())
Expect(vethCreator.CreateCalledWith.HostIfcName).To(Equal("host"))
Expect(vethCreator.CreateCalledWith.ContainerIfcName).To(Equal("container"))
})
Context("when creating the pair fails", func() {
It("returns a wrapped error", func() {
config.HostIntf = "host"
config.BridgeName = "bridge"
config.ContainerIntf = "container"
vethCreator.CreateReturns.Err = errors.New("foo bar baz")
err := configurer.Apply(logger, config, 42)
Expect(err).To(HaveOccurred())
Expect(err).To(MatchError(&configure.VethPairCreationError{Cause: vethCreator.CreateReturns.Err, HostIfcName: "host", ContainerIfcName: "container"}))