Allow `prettyPrintInfo` to return multiple errors

This allows it to print what it can, rather than aborting half way when a bad
security context is hit.

Signed-off-by: Ian Campbell <ijc@docker.com>

cli/command/system/info.go

@@ -94,7 +94,7 @@ func prettyPrintInfo(dockerCli command.Cli, info info) error {
 	fmt.Fprintln(dockerCli.Out(), "Server")
 	fmt.Fprintln(dockerCli.Out(), "------")
 	if info.Info != nil {
-		if err := prettyPrintServerInfo(dockerCli, *info.Info); err != nil {
+		for _, err := range prettyPrintServerInfo(dockerCli, *info.Info) {
 			info.ServerErrors = append(info.ServerErrors, err.Error())
 		}
 	}
@@ -119,7 +119,9 @@ func prettyPrintClientInfo(dockerCli command.Cli, info clientInfo) error {
 }
 
 // nolint: gocyclo
-func prettyPrintServerInfo(dockerCli command.Cli, info types.Info) error {
+func prettyPrintServerInfo(dockerCli command.Cli, info types.Info) []error {
+	var errs []error
+
 	fmt.Fprintln(dockerCli.Out(), "Containers:", info.Containers)
 	fmt.Fprintln(dockerCli.Out(), " Running:", info.ContainersRunning)
 	fmt.Fprintln(dockerCli.Out(), " Paused:", info.ContainersPaused)
@@ -180,20 +182,20 @@ func prettyPrintServerInfo(dockerCli command.Cli, info types.Info) error {
 			fmt.Fprint(dockerCli.Out(), "\n")
 		}
 		if len(info.SecurityOptions) != 0 {
-			kvs, err := types.DecodeSecurityOptions(info.SecurityOptions)
-			if err != nil {
-				return err
-			}
-			fmt.Fprintln(dockerCli.Out(), "Security Options:")
-			for _, so := range kvs {
-				fmt.Fprintln(dockerCli.Out(), " "+so.Name)
-				for _, o := range so.Options {
-					switch o.Key {
-					case "profile":
-						if o.Value != "default" {
-							fmt.Fprintln(dockerCli.Err(), "  WARNING: You're not using the default seccomp profile")
+			if kvs, err := types.DecodeSecurityOptions(info.SecurityOptions); err != nil {
+				errs = append(errs, err)
+			} else {
+				fmt.Fprintln(dockerCli.Out(), "Security Options:")
+				for _, so := range kvs {
+					fmt.Fprintln(dockerCli.Out(), " "+so.Name)
+					for _, o := range so.Options {
+						switch o.Key {
+						case "profile":
+							if o.Value != "default" {
+								fmt.Fprintln(dockerCli.Err(), "  WARNING: You're not using the default seccomp profile")
+							}
+							fmt.Fprintln(dockerCli.Out(), "  Profile:", o.Value)
 						}
-						fmt.Fprintln(dockerCli.Out(), "  Profile:", o.Value)
 					}
 				}
 			}
@@ -274,7 +276,7 @@ func prettyPrintServerInfo(dockerCli command.Cli, info types.Info) error {
 	fmt.Fprint(dockerCli.Out(), "\n")
 
 	printServerWarnings(dockerCli, info)
-	return nil
+	return errs
 }
 
 // nolint: gocyclo

cli/command/system/info_test.go

@@ -224,6 +224,9 @@ func TestPrettyPrintInfo(t *testing.T) {
 		"WARNING: bridge-nf-call-ip6tables is disabled",
 	}
 
+	sampleInfoBadSecurity := sampleInfoNoSwarm
+	sampleInfoBadSecurity.SecurityOptions = []string{"foo="}
+
 	for _, tc := range []struct {
 		doc            string
 		dockerInfo     info
@@ -280,6 +283,17 @@ func TestPrettyPrintInfo(t *testing.T) {
 			jsonGolden:    "docker-info-errors",
 			expectedError: "errors pretty printing info",
 		},
+		{
+			doc: "bad security info",
+			dockerInfo: info{
+				Info:         &sampleInfoBadSecurity,
+				ServerErrors: []string{"an error happened"},
+				ClientInfo:   &clientInfo{Debug: false},
+			},
+			prettyGolden:  "docker-info-badsec",
+			jsonGolden:    "docker-info-badsec",
+			expectedError: "errors pretty printing info",
+		},
 	} {
 		t.Run(tc.doc, func(t *testing.T) {
 			cli := test.NewFakeCli(&fakeClient{})

cli/command/system/testdata/docker-info-badsec.golden

@@ -0,0 +1,54 @@
+Client
+------
+Debug Mode: false
+
+Server
+------
+Containers: 0
+ Running: 0
+ Paused: 0
+ Stopped: 0
+Images: 0
+Server Version: 17.06.1-ce
+Storage Driver: aufs
+ Root Dir: /var/lib/docker/aufs
+ Backing Filesystem: extfs
+ Dirs: 0
+ Dirperm1 Supported: true
+Logging Driver: json-file
+Cgroup Driver: cgroupfs
+Plugins:
+ Volume: local
+ Network: bridge host macvlan null overlay
+ Log: awslogs fluentd gcplogs gelf journald json-file logentries splunk syslog
+Swarm: inactive
+Runtimes: runc
+Default Runtime: runc
+Init Binary: docker-init
+containerd version: 6e23458c129b551d5c9871e5174f6b1b7f6d1170
+runc version: 810190ceaa507aa2727d7ae6f4790c76ec150bd2
+init version: 949e6fa
+Kernel Version: 4.4.0-87-generic
+Operating System: Ubuntu 16.04.3 LTS
+OSType: linux
+Architecture: x86_64
+CPUs: 2
+Total Memory: 1.953GiB
+Name: system-sample
+ID: EKHL:QDUU:QZ7U:MKGD:VDXK:S27Q:GIPU:24B7:R7VT:DGN6:QCSF:2UBX
+Docker Root Dir: /var/lib/docker
+Debug Mode: true
+ File Descriptors: 33
+ Goroutines: 135
+ System Time: 2017-08-24T17:44:34.077811894Z
+ EventsListeners: 0
+Registry: https://index.docker.io/v1/
+Labels:
+ provider=digitalocean
+Experimental: false
+Insecure Registries:
+ 127.0.0.0/8
+Live Restore Enabled: false
+
+ERROR: an error happened
+ERROR: invalid empty security option

cli/command/system/testdata/docker-info-badsec.json.golden

@@ -0,0 +1 @@
+{"ID":"EKHL:QDUU:QZ7U:MKGD:VDXK:S27Q:GIPU:24B7:R7VT:DGN6:QCSF:2UBX","Containers":0,"ContainersRunning":0,"ContainersPaused":0,"ContainersStopped":0,"Images":0,"Driver":"aufs","DriverStatus":[["Root Dir","/var/lib/docker/aufs"],["Backing Filesystem","extfs"],["Dirs","0"],["Dirperm1 Supported","true"]],"SystemStatus":null,"Plugins":{"Volume":["local"],"Network":["bridge","host","macvlan","null","overlay"],"Authorization":null,"Log":["awslogs","fluentd","gcplogs","gelf","journald","json-file","logentries","splunk","syslog"]},"MemoryLimit":true,"SwapLimit":true,"KernelMemory":true,"KernelMemoryTCP":false,"CpuCfsPeriod":true,"CpuCfsQuota":true,"CPUShares":true,"CPUSet":true,"IPv4Forwarding":true,"BridgeNfIptables":true,"BridgeNfIp6tables":true,"Debug":true,"NFd":33,"OomKillDisable":true,"NGoroutines":135,"SystemTime":"2017-08-24T17:44:34.077811894Z","LoggingDriver":"json-file","CgroupDriver":"cgroupfs","NEventsListener":0,"KernelVersion":"4.4.0-87-generic","OperatingSystem":"Ubuntu 16.04.3 LTS","OSType":"linux","Architecture":"x86_64","IndexServerAddress":"https://index.docker.io/v1/","RegistryConfig":{"AllowNondistributableArtifactsCIDRs":null,"AllowNondistributableArtifactsHostnames":null,"InsecureRegistryCIDRs":["127.0.0.0/8"],"IndexConfigs":{"docker.io":{"Name":"docker.io","Mirrors":null,"Secure":true,"Official":true}},"Mirrors":null},"NCPU":2,"MemTotal":2097356800,"GenericResources":null,"DockerRootDir":"/var/lib/docker","HttpProxy":"","HttpsProxy":"","NoProxy":"","Name":"system-sample","Labels":["provider=digitalocean"],"ExperimentalBuild":false,"ServerVersion":"17.06.1-ce","ClusterStore":"","ClusterAdvertise":"","Runtimes":{"runc":{"path":"docker-runc"}},"DefaultRuntime":"runc","Swarm":{"NodeID":"","NodeAddr":"","LocalNodeState":"inactive","ControlAvailable":false,"Error":"","RemoteManagers":null},"LiveRestoreEnabled":false,"Isolation":"","InitBinary":"docker-init","ContainerdCommit":{"ID":"6e23458c129b551d5c9871e5174f6b1b7f6d1170","Expected":"6e23458c129b551d5c9871e5174f6b1b7f6d1170"},"RuncCommit":{"ID":"810190ceaa507aa2727d7ae6f4790c76ec150bd2","Expected":"810190ceaa507aa2727d7ae6f4790c76ec150bd2"},"InitCommit":{"ID":"949e6fa","Expected":"949e6fa"},"SecurityOptions":["foo="],"Warnings":null,"ServerErrors":["an error happened"],"ClientInfo":{"Debug":false,"Warnings":null}}