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Add support for network ids

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The network ID is not stored. It is just the sha256 hash from
the network name. There is a risk of a potential hash collision.
However it's very unlikely and even if we hit this it will
complain that more than network with this ID exists.

The main benefit is that the compat api can have proper
network ID support. Also this adds the support for
`podman network ls --format "{{.ID}}"` and `--filter id=<ID>`.

It also ensures that we can do network rm <ID> and network
inspect <ID>.

Since we use a hash this commit is backwards compatible even for
already existing networks.

Signed-off-by: Paul Holzinger <paul.holzinger@web.de>
This commit is contained in:
Paul Holzinger
2020-12-01 22:12:16 +01:00
parent 9c5fe954cc
commit c31a5c0d9c
9 changed files with 124 additions and 23 deletions
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34
test/e2e/network_test.go
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@ -135,6 +135,40 @@ var _ = Describe("Podman network", func() {
Expect(session.LineInOutputContains(name)).To(BeFalse())
})
It("podman network ID test", func() {
net := "networkIDTest"
// the network id should be the sha256 hash of the network name
netID := "6073aefe03cdf8f29be5b23ea9795c431868a3a22066a6290b187691614fee84"
session := podmanTest.Podman([]string{"network", "create", net})
session.WaitWithDefaultTimeout()
defer podmanTest.removeCNINetwork(net)
Expect(session.ExitCode()).To(BeZero())
session = podmanTest.Podman([]string{"network", "ls", "--format", "{{.Name}} {{.ID}}", "--filter", "id=" + netID})
session.WaitWithDefaultTimeout()
Expect(session.ExitCode()).To(BeZero())
Expect(session.OutputToString()).To(ContainSubstring(net + " " + netID[:12]))
session = podmanTest.Podman([]string{"network", "ls", "--format", "{{.Name}} {{.ID}}", "--filter", "id=" + netID[10:50], "--no-trunc"})
session.WaitWithDefaultTimeout()
Expect(session.ExitCode()).To(BeZero())
Expect(session.OutputToString()).To(ContainSubstring(net + " " + netID))
session = podmanTest.Podman([]string{"network", "inspect", netID[:40]})
session.WaitWithDefaultTimeout()
Expect(session.ExitCode()).To(BeZero())
Expect(session.OutputToString()).To(ContainSubstring(net))
session = podmanTest.Podman([]string{"network", "inspect", netID[1:]})
session.WaitWithDefaultTimeout()
Expect(session.ExitCode()).ToNot(BeZero())
Expect(session.ErrorToString()).To(ContainSubstring("no such network"))
session = podmanTest.Podman([]string{"network", "rm", netID})
session.WaitWithDefaultTimeout()
Expect(session.ExitCode()).To(BeZero())
})
rm_func := func(rm string) {
It(fmt.Sprintf("podman network %s no args", rm), func() {
session := podmanTest.Podman([]string{"network", rm})