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Use warnings provided by daemon
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Warnings are now generated by the daemon, and returned as
part of the /info API response.

If warnings are returned by the daemon; use those instead
of generating them locally.

Signed-off-by: Sebastiaan van Stijn <[email protected]>
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@thaJeztah
thaJeztah committed Aug 21, 2018
1 parent 44857a2 commit 50f65a6
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Showing 2 changed files with 99 additions and 48 deletions.
104 changes: 64 additions & 40 deletions cli/command/system/info.go
View file
Original file line number Diff line number Diff line change
Expand Up @@ -206,45 +206,7 @@ func prettyPrintInfo(dockerCli command.Cli, info types.Info) error {
fmt.Fprintln(dockerCli.Out(), "Live Restore Enabled:", info.LiveRestoreEnabled)
fmt.Fprint(dockerCli.Out(), "\n")

// Only output these warnings if the server does not support these features
if info.OSType != "windows" {
printStorageDriverWarnings(dockerCli, info)

if !info.MemoryLimit {
fmt.Fprintln(dockerCli.Err(), "WARNING: No memory limit support")
}
if !info.SwapLimit {
fmt.Fprintln(dockerCli.Err(), "WARNING: No swap limit support")
}
if !info.KernelMemory {
fmt.Fprintln(dockerCli.Err(), "WARNING: No kernel memory limit support")
}
if !info.OomKillDisable {
fmt.Fprintln(dockerCli.Err(), "WARNING: No oom kill disable support")
}
if !info.CPUCfsQuota {
fmt.Fprintln(dockerCli.Err(), "WARNING: No cpu cfs quota support")
}
if !info.CPUCfsPeriod {
fmt.Fprintln(dockerCli.Err(), "WARNING: No cpu cfs period support")
}
if !info.CPUShares {
fmt.Fprintln(dockerCli.Err(), "WARNING: No cpu shares support")
}
if !info.CPUSet {
fmt.Fprintln(dockerCli.Err(), "WARNING: No cpuset support")
}
if !info.IPv4Forwarding {
fmt.Fprintln(dockerCli.Err(), "WARNING: IPv4 forwarding is disabled")
}
if !info.BridgeNfIptables {
fmt.Fprintln(dockerCli.Err(), "WARNING: bridge-nf-call-iptables is disabled")
}
if !info.BridgeNfIP6tables {
fmt.Fprintln(dockerCli.Err(), "WARNING: bridge-nf-call-ip6tables is disabled")
}
}

printWarnings(dockerCli, info)
return nil
}

Expand Down Expand Up @@ -305,11 +267,73 @@ func printSwarmInfo(dockerCli command.Cli, info types.Info) {
}
}

func printWarnings(dockerCli command.Cli, info types.Info) {
if len(info.Warnings) > 0 {
fmt.Fprintln(dockerCli.Err(), strings.Join(info.Warnings, "\n"))
return
}
// daemon didn't return warnings. Fallback to old behavior
printStorageDriverWarnings(dockerCli, info)
printWarningsLegacy(dockerCli, info)
}

// printWarningsLegacy generates warnings based on information returned by the daemon.
// DEPRECATED: warnings are now generated by the daemon, and returned in
// info.Warnings. This function is used to provide backward compatibility with
// daemons that do not provide these warnings. No new warnings should be added
// here.
func printWarningsLegacy(dockerCli command.Cli, info types.Info) {
if info.OSType == "windows" {
return
}
if !info.MemoryLimit {
fmt.Fprintln(dockerCli.Err(), "WARNING: No memory limit support")
}
if !info.SwapLimit {
fmt.Fprintln(dockerCli.Err(), "WARNING: No swap limit support")
}
if !info.KernelMemory {
fmt.Fprintln(dockerCli.Err(), "WARNING: No kernel memory limit support")
}
if !info.OomKillDisable {
fmt.Fprintln(dockerCli.Err(), "WARNING: No oom kill disable support")
}
if !info.CPUCfsQuota {
fmt.Fprintln(dockerCli.Err(), "WARNING: No cpu cfs quota support")
}
if !info.CPUCfsPeriod {
fmt.Fprintln(dockerCli.Err(), "WARNING: No cpu cfs period support")
}
if !info.CPUShares {
fmt.Fprintln(dockerCli.Err(), "WARNING: No cpu shares support")
}
if !info.CPUSet {
fmt.Fprintln(dockerCli.Err(), "WARNING: No cpuset support")
}
if !info.IPv4Forwarding {
fmt.Fprintln(dockerCli.Err(), "WARNING: IPv4 forwarding is disabled")
}
if !info.BridgeNfIptables {
fmt.Fprintln(dockerCli.Err(), "WARNING: bridge-nf-call-iptables is disabled")
}
if !info.BridgeNfIP6tables {
fmt.Fprintln(dockerCli.Err(), "WARNING: bridge-nf-call-ip6tables is disabled")
}
}

// printStorageDriverWarnings generates warnings based on storage-driver information
// returned by the daemon.
// DEPRECATED: warnings are now generated by the daemon, and returned in
// info.Warnings. This function is used to provide backward compatibility with
// daemons that do not provide these warnings. No new warnings should be added
// here.
func printStorageDriverWarnings(dockerCli command.Cli, info types.Info) {
if info.OSType == "windows" {
return
}
if info.DriverStatus == nil {
return
}

for _, pair := range info.DriverStatus {
if pair[0] == "Data loop file" {
fmt.Fprintf(dockerCli.Err(), "WARNING: %s: usage of loopback devices is "+
Expand Down
43 changes: 35 additions & 8 deletions cli/command/system/info_test.go
View file
Original file line number Diff line number Diff line change
Expand Up @@ -207,32 +207,59 @@ func TestPrettyPrintInfo(t *testing.T) {
infoWithWarningsLinux.BridgeNfIptables = false
infoWithWarningsLinux.BridgeNfIP6tables = false

sampleInfoDaemonWarnings := sampleInfoNoSwarm
sampleInfoDaemonWarnings.Warnings = []string{
"WARNING: No memory limit support",
"WARNING: No swap limit support",
"WARNING: No kernel memory limit support",
"WARNING: No oom kill disable support",
"WARNING: No cpu cfs quota support",
"WARNING: No cpu cfs period support",
"WARNING: No cpu shares support",
"WARNING: No cpuset support",
"WARNING: IPv4 forwarding is disabled",
"WARNING: bridge-nf-call-iptables is disabled",
"WARNING: bridge-nf-call-ip6tables is disabled",
}

for _, tc := range []struct {
doc string
dockerInfo types.Info
expectedGolden string
warningsGolden string
}{
{
doc: "info without swarm",
dockerInfo: sampleInfoNoSwarm,
expectedGolden: "docker-info-no-swarm",
},
{
doc: "info with swarm",
dockerInfo: infoWithSwarm,
expectedGolden: "docker-info-with-swarm",
},
{
doc: "info with legacy warnings",
dockerInfo: infoWithWarningsLinux,
expectedGolden: "docker-info-no-swarm",
warningsGolden: "docker-info-warnings",
},
{
doc: "info with daemon warnings",
dockerInfo: sampleInfoDaemonWarnings,
expectedGolden: "docker-info-no-swarm",
warningsGolden: "docker-info-warnings",
},
} {
cli := test.NewFakeCli(&fakeClient{})
assert.NilError(t, prettyPrintInfo(cli, tc.dockerInfo))
golden.Assert(t, cli.OutBuffer().String(), tc.expectedGolden+".golden")
if tc.warningsGolden != "" {
golden.Assert(t, cli.ErrBuffer().String(), tc.warningsGolden+".golden")
} else {
assert.Check(t, is.Equal("", cli.ErrBuffer().String()))
}
t.Run(tc.doc, func(t *testing.T) {
cli := test.NewFakeCli(&fakeClient{})
assert.NilError(t, prettyPrintInfo(cli, tc.dockerInfo))
golden.Assert(t, cli.OutBuffer().String(), tc.expectedGolden+".golden")
if tc.warningsGolden != "" {
golden.Assert(t, cli.ErrBuffer().String(), tc.warningsGolden+".golden")
} else {
assert.Check(t, is.Equal("", cli.ErrBuffer().String()))
}
})
}
}

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