open-consul/agent/checks/check_test.go

934 lines
26 KiB
Go

package checks
import (
"bytes"
"fmt"
"io/ioutil"
"log"
"net"
"net/http"
"net/http/httptest"
"os"
"reflect"
"regexp"
"strings"
"testing"
"time"
"github.com/hashicorp/consul/agent/mock"
"github.com/hashicorp/consul/api"
"github.com/hashicorp/consul/sdk/testutil/retry"
"github.com/hashicorp/consul/types"
uuid "github.com/hashicorp/go-uuid"
)
func uniqueID() string {
id, err := uuid.GenerateUUID()
if err != nil {
panic(err)
}
return id
}
func TestCheckMonitor_Script(t *testing.T) {
tests := []struct {
script, status string
}{
{"exit 0", "passing"},
{"exit 1", "warning"},
{"exit 2", "critical"},
{"foobarbaz", "critical"},
}
for _, tt := range tests {
t.Run(tt.status, func(t *testing.T) {
notif := mock.NewNotify()
check := &CheckMonitor{
Notify: notif,
CheckID: types.CheckID("foo"),
Script: tt.script,
Interval: 25 * time.Millisecond,
Logger: log.New(ioutil.Discard, uniqueID(), log.LstdFlags),
OutputMaxSize: DefaultBufSize,
}
check.Start()
defer check.Stop()
retry.Run(t, func(r *retry.R) {
if got, want := notif.Updates("foo"), 2; got < want {
r.Fatalf("got %d updates want at least %d", got, want)
}
if got, want := notif.State("foo"), tt.status; got != want {
r.Fatalf("got state %q want %q", got, want)
}
})
})
}
}
func TestCheckMonitor_Args(t *testing.T) {
tests := []struct {
args []string
status string
}{
{[]string{"sh", "-c", "exit 0"}, "passing"},
{[]string{"sh", "-c", "exit 1"}, "warning"},
{[]string{"sh", "-c", "exit 2"}, "critical"},
{[]string{"foobarbaz"}, "critical"},
}
for _, tt := range tests {
t.Run(tt.status, func(t *testing.T) {
notif := mock.NewNotify()
check := &CheckMonitor{
Notify: notif,
CheckID: types.CheckID("foo"),
ScriptArgs: tt.args,
Interval: 25 * time.Millisecond,
Logger: log.New(ioutil.Discard, uniqueID(), log.LstdFlags),
OutputMaxSize: DefaultBufSize,
}
check.Start()
defer check.Stop()
retry.Run(t, func(r *retry.R) {
if got, want := notif.Updates("foo"), 2; got < want {
r.Fatalf("got %d updates want at least %d", got, want)
}
if got, want := notif.State("foo"), tt.status; got != want {
r.Fatalf("got state %q want %q", got, want)
}
})
})
}
}
func TestCheckMonitor_Timeout(t *testing.T) {
// t.Parallel() // timing test. no parallel
notif := mock.NewNotify()
check := &CheckMonitor{
Notify: notif,
CheckID: types.CheckID("foo"),
ScriptArgs: []string{"sh", "-c", "sleep 1 && exit 0"},
Interval: 50 * time.Millisecond,
Timeout: 25 * time.Millisecond,
Logger: log.New(ioutil.Discard, uniqueID(), log.LstdFlags),
OutputMaxSize: DefaultBufSize,
}
check.Start()
defer check.Stop()
time.Sleep(250 * time.Millisecond)
// Should have at least 2 updates
if notif.Updates("foo") < 2 {
t.Fatalf("should have at least 2 updates %v", notif.UpdatesMap())
}
if notif.State("foo") != "critical" {
t.Fatalf("should be critical %v", notif.StateMap())
}
}
func TestCheckMonitor_RandomStagger(t *testing.T) {
// t.Parallel() // timing test. no parallel
notif := mock.NewNotify()
check := &CheckMonitor{
Notify: notif,
CheckID: types.CheckID("foo"),
ScriptArgs: []string{"sh", "-c", "exit 0"},
Interval: 25 * time.Millisecond,
Logger: log.New(ioutil.Discard, uniqueID(), log.LstdFlags),
OutputMaxSize: DefaultBufSize,
}
check.Start()
defer check.Stop()
time.Sleep(500 * time.Millisecond)
// Should have at least 1 update
if notif.Updates("foo") < 1 {
t.Fatalf("should have 1 or more updates %v", notif.UpdatesMap())
}
if notif.State("foo") != api.HealthPassing {
t.Fatalf("should be %v %v", api.HealthPassing, notif.StateMap())
}
}
func TestCheckMonitor_LimitOutput(t *testing.T) {
t.Parallel()
notif := mock.NewNotify()
check := &CheckMonitor{
Notify: notif,
CheckID: types.CheckID("foo"),
ScriptArgs: []string{"od", "-N", "81920", "/dev/urandom"},
Interval: 25 * time.Millisecond,
Logger: log.New(ioutil.Discard, uniqueID(), log.LstdFlags),
OutputMaxSize: DefaultBufSize,
}
check.Start()
defer check.Stop()
time.Sleep(50 * time.Millisecond)
// Allow for extra bytes for the truncation message
if len(notif.Output("foo")) > DefaultBufSize+100 {
t.Fatalf("output size is too long")
}
}
func TestCheckTTL(t *testing.T) {
// t.Parallel() // timing test. no parallel
notif := mock.NewNotify()
check := &CheckTTL{
Notify: notif,
CheckID: types.CheckID("foo"),
TTL: 200 * time.Millisecond,
Logger: log.New(ioutil.Discard, uniqueID(), log.LstdFlags),
}
check.Start()
defer check.Stop()
time.Sleep(100 * time.Millisecond)
check.SetStatus(api.HealthPassing, "test-output")
if notif.Updates("foo") != 1 {
t.Fatalf("should have 1 updates %v", notif.UpdatesMap())
}
if notif.State("foo") != api.HealthPassing {
t.Fatalf("should be passing %v", notif.StateMap())
}
// Ensure we don't fail early
time.Sleep(150 * time.Millisecond)
if notif.Updates("foo") != 1 {
t.Fatalf("should have 1 updates %v", notif.UpdatesMap())
}
// Wait for the TTL to expire
time.Sleep(150 * time.Millisecond)
if notif.Updates("foo") != 2 {
t.Fatalf("should have 2 updates %v", notif.UpdatesMap())
}
if notif.State("foo") != api.HealthCritical {
t.Fatalf("should be critical %v", notif.StateMap())
}
if !strings.Contains(notif.Output("foo"), "test-output") {
t.Fatalf("should have retained output %v", notif.OutputMap())
}
}
func TestCheckHTTP(t *testing.T) {
t.Parallel()
tests := []struct {
desc string
code int
method string
header http.Header
status string
}{
// passing
{code: 200, status: api.HealthPassing},
{code: 201, status: api.HealthPassing},
{code: 250, status: api.HealthPassing},
{code: 299, status: api.HealthPassing},
// warning
{code: 429, status: api.HealthWarning},
// critical
{code: 150, status: api.HealthCritical},
{code: 199, status: api.HealthCritical},
{code: 300, status: api.HealthCritical},
{code: 400, status: api.HealthCritical},
{code: 500, status: api.HealthCritical},
// custom method
{desc: "custom method GET", code: 200, method: "GET", status: api.HealthPassing},
{desc: "custom method POST", code: 200, header: http.Header{"Content-Length": []string{"0"}}, method: "POST", status: api.HealthPassing},
{desc: "custom method abc", code: 200, method: "abc", status: api.HealthPassing},
// custom header
{desc: "custom header", code: 200, header: http.Header{"A": []string{"b", "c"}}, status: api.HealthPassing},
{desc: "host header", code: 200, header: http.Header{"Host": []string{"a"}}, status: api.HealthPassing},
}
for _, tt := range tests {
desc := tt.desc
if desc == "" {
desc = fmt.Sprintf("code %d -> status %s", tt.code, tt.status)
}
t.Run(desc, func(t *testing.T) {
server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
if tt.method != "" && tt.method != r.Method {
w.WriteHeader(999)
return
}
expectedHeader := http.Header{
"Accept": []string{"text/plain, text/*, */*"},
"Accept-Encoding": []string{"gzip"},
"Connection": []string{"close"},
"User-Agent": []string{"Consul Health Check"},
}
for k, v := range tt.header {
expectedHeader[k] = v
}
// the Host header is in r.Host and not in the headers
host := expectedHeader.Get("Host")
if host != "" && host != r.Host {
w.WriteHeader(999)
return
}
expectedHeader.Del("Host")
if !reflect.DeepEqual(expectedHeader, r.Header) {
w.WriteHeader(999)
return
}
// Body larger than 4k limit
body := bytes.Repeat([]byte{'a'}, 2*DefaultBufSize)
w.WriteHeader(tt.code)
w.Write(body)
}))
defer server.Close()
notif := mock.NewNotify()
check := &CheckHTTP{
Notify: notif,
CheckID: types.CheckID("foo"),
HTTP: server.URL,
Method: tt.method,
OutputMaxSize: DefaultBufSize,
Header: tt.header,
Interval: 10 * time.Millisecond,
Logger: log.New(ioutil.Discard, uniqueID(), log.LstdFlags),
}
check.Start()
defer check.Stop()
retry.Run(t, func(r *retry.R) {
if got, want := notif.Updates("foo"), 2; got < want {
r.Fatalf("got %d updates want at least %d", got, want)
}
if got, want := notif.State("foo"), tt.status; got != want {
r.Fatalf("got state %q want %q", got, want)
}
// Allow slightly more data than DefaultBufSize, for the header
if n := len(notif.Output("foo")); n > (DefaultBufSize + 256) {
r.Fatalf("output too long: %d (%d-byte limit)", n, DefaultBufSize)
}
})
})
}
}
func TestCheckHTTPTCP_BigTimeout(t *testing.T) {
testCases := []struct {
timeoutIn, intervalIn, timeoutWant time.Duration
}{
{
timeoutIn: 31 * time.Second,
intervalIn: 30 * time.Second,
timeoutWant: 31 * time.Second,
},
{
timeoutIn: 30 * time.Second,
intervalIn: 30 * time.Second,
timeoutWant: 30 * time.Second,
},
{
timeoutIn: 29 * time.Second,
intervalIn: 30 * time.Second,
timeoutWant: 29 * time.Second,
},
{
timeoutIn: 0 * time.Second,
intervalIn: 10 * time.Second,
timeoutWant: 10 * time.Second,
},
{
timeoutIn: 0 * time.Second,
intervalIn: 30 * time.Second,
timeoutWant: 10 * time.Second,
},
{
timeoutIn: 10 * time.Second,
intervalIn: 30 * time.Second,
timeoutWant: 10 * time.Second,
},
{
timeoutIn: 9 * time.Second,
intervalIn: 30 * time.Second,
timeoutWant: 9 * time.Second,
},
{
timeoutIn: -1 * time.Second,
intervalIn: 10 * time.Second,
timeoutWant: 10 * time.Second,
},
{
timeoutIn: 0 * time.Second,
intervalIn: 5 * time.Second,
timeoutWant: 10 * time.Second,
},
}
for _, tc := range testCases {
desc := fmt.Sprintf("timeoutIn: %v, intervalIn: %v", tc.timeoutIn, tc.intervalIn)
t.Run(desc, func(t *testing.T) {
checkHTTP := &CheckHTTP{
Timeout: tc.timeoutIn,
Interval: tc.intervalIn,
}
checkHTTP.Start()
defer checkHTTP.Stop()
if checkHTTP.httpClient.Timeout != tc.timeoutWant {
t.Fatalf("expected HTTP timeout to be %v, got %v", tc.timeoutWant, checkHTTP.httpClient.Timeout)
}
checkTCP := &CheckTCP{
Timeout: tc.timeoutIn,
Interval: tc.intervalIn,
}
checkTCP.Start()
defer checkTCP.Stop()
if checkTCP.dialer.Timeout != tc.timeoutWant {
t.Fatalf("expected TCP timeout to be %v, got %v", tc.timeoutWant, checkTCP.dialer.Timeout)
}
})
}
}
func TestCheckMaxOutputSize(t *testing.T) {
t.Parallel()
timeout := 5 * time.Millisecond
server := httptest.NewServer(http.HandlerFunc(func(writer http.ResponseWriter, req *http.Request) {
body := bytes.Repeat([]byte{'x'}, 2*DefaultBufSize)
writer.WriteHeader(200)
writer.Write(body)
}))
defer server.Close()
notif := mock.NewNotify()
maxOutputSize := 32
check := &CheckHTTP{
Notify: notif,
CheckID: types.CheckID("bar"),
HTTP: server.URL + "/v1/agent/self",
Timeout: timeout,
Interval: 2 * time.Millisecond,
Logger: log.New(ioutil.Discard, uniqueID(), log.LstdFlags),
OutputMaxSize: maxOutputSize,
}
check.Start()
defer check.Stop()
retry.Run(t, func(r *retry.R) {
if got, want := notif.Updates("bar"), 2; got < want {
r.Fatalf("got %d updates want at least %d", got, want)
}
if got, want := notif.State("bar"), api.HealthPassing; got != want {
r.Fatalf("got state %q want %q", got, want)
}
if got, want := notif.Output("bar"), "HTTP GET "+server.URL+"/v1/agent/self: 200 OK Output: "+strings.Repeat("x", maxOutputSize); got != want {
r.Fatalf("got state %q want %q", got, want)
}
})
}
func TestCheckHTTPTimeout(t *testing.T) {
t.Parallel()
timeout := 5 * time.Millisecond
server := httptest.NewServer(http.HandlerFunc(func(http.ResponseWriter, *http.Request) {
time.Sleep(2 * timeout)
}))
defer server.Close()
notif := mock.NewNotify()
check := &CheckHTTP{
Notify: notif,
CheckID: types.CheckID("bar"),
HTTP: server.URL,
Timeout: timeout,
Interval: 10 * time.Millisecond,
Logger: log.New(ioutil.Discard, uniqueID(), log.LstdFlags),
}
check.Start()
defer check.Stop()
retry.Run(t, func(r *retry.R) {
if got, want := notif.Updates("bar"), 2; got < want {
r.Fatalf("got %d updates want at least %d", got, want)
}
if got, want := notif.State("bar"), api.HealthCritical; got != want {
r.Fatalf("got state %q want %q", got, want)
}
})
}
func TestCheckHTTP_disablesKeepAlives(t *testing.T) {
t.Parallel()
check := &CheckHTTP{
CheckID: types.CheckID("foo"),
HTTP: "http://foo.bar/baz",
Interval: 10 * time.Second,
Logger: log.New(ioutil.Discard, uniqueID(), log.LstdFlags),
}
check.Start()
defer check.Stop()
if !check.httpClient.Transport.(*http.Transport).DisableKeepAlives {
t.Fatalf("should have disabled keepalives")
}
}
func largeBodyHandler(code int) http.Handler {
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
// Body larger than 4k limit
body := bytes.Repeat([]byte{'a'}, 2*DefaultBufSize)
w.WriteHeader(code)
w.Write(body)
})
}
func TestCheckHTTP_TLS_SkipVerify(t *testing.T) {
t.Parallel()
server := httptest.NewTLSServer(largeBodyHandler(200))
defer server.Close()
tlsConfig := &api.TLSConfig{
InsecureSkipVerify: true,
}
tlsClientConfig, err := api.SetupTLSConfig(tlsConfig)
if err != nil {
t.Fatalf("err: %v", err)
}
notif := mock.NewNotify()
check := &CheckHTTP{
Notify: notif,
CheckID: types.CheckID("skipverify_true"),
HTTP: server.URL,
Interval: 25 * time.Millisecond,
Logger: log.New(ioutil.Discard, uniqueID(), log.LstdFlags),
TLSClientConfig: tlsClientConfig,
}
check.Start()
defer check.Stop()
if !check.httpClient.Transport.(*http.Transport).TLSClientConfig.InsecureSkipVerify {
t.Fatalf("should be true")
}
retry.Run(t, func(r *retry.R) {
if got, want := notif.State("skipverify_true"), api.HealthPassing; got != want {
r.Fatalf("got state %q want %q", got, want)
}
})
}
func TestCheckHTTP_TLS_BadVerify(t *testing.T) {
t.Parallel()
server := httptest.NewTLSServer(largeBodyHandler(200))
defer server.Close()
tlsClientConfig, err := api.SetupTLSConfig(&api.TLSConfig{})
if err != nil {
t.Fatalf("err: %v", err)
}
notif := mock.NewNotify()
check := &CheckHTTP{
Notify: notif,
CheckID: types.CheckID("skipverify_false"),
HTTP: server.URL,
Interval: 100 * time.Millisecond,
Logger: log.New(ioutil.Discard, uniqueID(), log.LstdFlags),
TLSClientConfig: tlsClientConfig,
}
check.Start()
defer check.Stop()
if check.httpClient.Transport.(*http.Transport).TLSClientConfig.InsecureSkipVerify {
t.Fatalf("should default to false")
}
retry.Run(t, func(r *retry.R) {
// This should fail due to an invalid SSL cert
if got, want := notif.State("skipverify_false"), api.HealthCritical; got != want {
r.Fatalf("got state %q want %q", got, want)
}
if !strings.Contains(notif.Output("skipverify_false"), "certificate signed by unknown authority") {
r.Fatalf("should fail with certificate error %v", notif.OutputMap())
}
})
}
func mockTCPServer(network string) net.Listener {
var (
addr string
)
if network == `tcp6` {
addr = `[::1]:0`
} else {
addr = `127.0.0.1:0`
}
listener, err := net.Listen(network, addr)
if err != nil {
panic(err)
}
return listener
}
func expectTCPStatus(t *testing.T, tcp string, status string) {
notif := mock.NewNotify()
check := &CheckTCP{
Notify: notif,
CheckID: types.CheckID("foo"),
TCP: tcp,
Interval: 10 * time.Millisecond,
Logger: log.New(ioutil.Discard, uniqueID(), log.LstdFlags),
}
check.Start()
defer check.Stop()
retry.Run(t, func(r *retry.R) {
if got, want := notif.Updates("foo"), 2; got < want {
r.Fatalf("got %d updates want at least %d", got, want)
}
if got, want := notif.State("foo"), status; got != want {
r.Fatalf("got state %q want %q", got, want)
}
})
}
func TestCheckTCPCritical(t *testing.T) {
t.Parallel()
var (
tcpServer net.Listener
)
tcpServer = mockTCPServer(`tcp`)
expectTCPStatus(t, `127.0.0.1:0`, api.HealthCritical)
tcpServer.Close()
}
func TestCheckTCPPassing(t *testing.T) {
t.Parallel()
var (
tcpServer net.Listener
)
tcpServer = mockTCPServer(`tcp`)
expectTCPStatus(t, tcpServer.Addr().String(), api.HealthPassing)
tcpServer.Close()
if os.Getenv("TRAVIS") == "true" {
t.Skip("IPV6 not supported on travis-ci")
}
if os.Getenv("CIRCLECI") == "true" {
t.Skip("IPV6 not supported on CircleCI")
}
tcpServer = mockTCPServer(`tcp6`)
expectTCPStatus(t, tcpServer.Addr().String(), api.HealthPassing)
tcpServer.Close()
}
func TestCheck_Docker(t *testing.T) {
tests := []struct {
desc string
handlers map[string]http.HandlerFunc
out *regexp.Regexp
state string
}{
{
desc: "create exec: bad container id",
handlers: map[string]http.HandlerFunc{
"POST /containers/123/exec": func(w http.ResponseWriter, r *http.Request) {
w.WriteHeader(404)
},
},
out: regexp.MustCompile("^create exec failed for unknown container 123$"),
state: api.HealthCritical,
},
{
desc: "create exec: paused container",
handlers: map[string]http.HandlerFunc{
"POST /containers/123/exec": func(w http.ResponseWriter, r *http.Request) {
w.WriteHeader(409)
},
},
out: regexp.MustCompile("^create exec failed since container 123 is paused or stopped$"),
state: api.HealthCritical,
},
{
desc: "create exec: bad status code",
handlers: map[string]http.HandlerFunc{
"POST /containers/123/exec": func(w http.ResponseWriter, r *http.Request) {
w.WriteHeader(999)
fmt.Fprint(w, "some output")
},
},
out: regexp.MustCompile("^create exec failed for container 123 with status 999: some output$"),
state: api.HealthCritical,
},
{
desc: "create exec: bad json",
handlers: map[string]http.HandlerFunc{
"POST /containers/123/exec": func(w http.ResponseWriter, r *http.Request) {
w.WriteHeader(201)
w.Header().Set("Content-Type", "application/json")
fmt.Fprint(w, `this is not json`)
},
},
out: regexp.MustCompile("^create exec response for container 123 cannot be parsed: .*$"),
state: api.HealthCritical,
},
{
desc: "start exec: bad exec id",
handlers: map[string]http.HandlerFunc{
"POST /containers/123/exec": func(w http.ResponseWriter, r *http.Request) {
w.WriteHeader(201)
w.Header().Set("Content-Type", "application/json")
fmt.Fprint(w, `{"Id":"456"}`)
},
"POST /exec/456/start": func(w http.ResponseWriter, r *http.Request) {
w.WriteHeader(404)
},
},
out: regexp.MustCompile("^start exec failed for container 123: invalid exec id 456$"),
state: api.HealthCritical,
},
{
desc: "start exec: paused container",
handlers: map[string]http.HandlerFunc{
"POST /containers/123/exec": func(w http.ResponseWriter, r *http.Request) {
w.WriteHeader(201)
w.Header().Set("Content-Type", "application/json")
fmt.Fprint(w, `{"Id":"456"}`)
},
"POST /exec/456/start": func(w http.ResponseWriter, r *http.Request) {
w.WriteHeader(409)
},
},
out: regexp.MustCompile("^start exec failed since container 123 is paused or stopped$"),
state: api.HealthCritical,
},
{
desc: "start exec: bad status code",
handlers: map[string]http.HandlerFunc{
"POST /containers/123/exec": func(w http.ResponseWriter, r *http.Request) {
w.WriteHeader(201)
w.Header().Set("Content-Type", "application/json")
fmt.Fprint(w, `{"Id":"456"}`)
},
"POST /exec/456/start": func(w http.ResponseWriter, r *http.Request) {
w.WriteHeader(999)
fmt.Fprint(w, "some output")
},
},
out: regexp.MustCompile("^start exec failed for container 123 with status 999: body: some output err: <nil>$"),
state: api.HealthCritical,
},
{
desc: "inspect exec: bad exec id",
handlers: map[string]http.HandlerFunc{
"POST /containers/123/exec": func(w http.ResponseWriter, r *http.Request) {
w.WriteHeader(201)
w.Header().Set("Content-Type", "application/json")
fmt.Fprint(w, `{"Id":"456"}`)
},
"POST /exec/456/start": func(w http.ResponseWriter, r *http.Request) {
w.WriteHeader(200)
fmt.Fprint(w, "OK")
},
"GET /exec/456/json": func(w http.ResponseWriter, r *http.Request) {
w.WriteHeader(404)
},
},
out: regexp.MustCompile("^inspect exec failed for container 123: invalid exec id 456$"),
state: api.HealthCritical,
},
{
desc: "inspect exec: bad status code",
handlers: map[string]http.HandlerFunc{
"POST /containers/123/exec": func(w http.ResponseWriter, r *http.Request) {
w.WriteHeader(201)
w.Header().Set("Content-Type", "application/json")
fmt.Fprint(w, `{"Id":"456"}`)
},
"POST /exec/456/start": func(w http.ResponseWriter, r *http.Request) {
w.WriteHeader(200)
fmt.Fprint(w, "OK")
},
"GET /exec/456/json": func(w http.ResponseWriter, r *http.Request) {
w.WriteHeader(999)
fmt.Fprint(w, "some output")
},
},
out: regexp.MustCompile("^inspect exec failed for container 123 with status 999: some output$"),
state: api.HealthCritical,
},
{
desc: "inspect exec: bad json",
handlers: map[string]http.HandlerFunc{
"POST /containers/123/exec": func(w http.ResponseWriter, r *http.Request) {
w.WriteHeader(201)
w.Header().Set("Content-Type", "application/json")
fmt.Fprint(w, `{"Id":"456"}`)
},
"POST /exec/456/start": func(w http.ResponseWriter, r *http.Request) {
w.WriteHeader(200)
fmt.Fprint(w, "OK")
},
"GET /exec/456/json": func(w http.ResponseWriter, r *http.Request) {
w.WriteHeader(200)
w.Header().Set("Content-Type", "application/json")
fmt.Fprint(w, `this is not json`)
},
},
out: regexp.MustCompile("^inspect exec response for container 123 cannot be parsed: .*$"),
state: api.HealthCritical,
},
{
desc: "inspect exec: exit code 0: passing",
handlers: map[string]http.HandlerFunc{
"POST /containers/123/exec": func(w http.ResponseWriter, r *http.Request) {
w.WriteHeader(201)
w.Header().Set("Content-Type", "application/json")
fmt.Fprint(w, `{"Id":"456"}`)
},
"POST /exec/456/start": func(w http.ResponseWriter, r *http.Request) {
w.WriteHeader(200)
fmt.Fprint(w, "OK")
},
"GET /exec/456/json": func(w http.ResponseWriter, r *http.Request) {
w.WriteHeader(200)
w.Header().Set("Content-Type", "application/json")
fmt.Fprint(w, `{"ExitCode":0}`)
},
},
out: regexp.MustCompile("^OK$"),
state: api.HealthPassing,
},
{
desc: "inspect exec: exit code 0: passing: truncated",
handlers: map[string]http.HandlerFunc{
"POST /containers/123/exec": func(w http.ResponseWriter, r *http.Request) {
w.WriteHeader(201)
w.Header().Set("Content-Type", "application/json")
fmt.Fprint(w, `{"Id":"456"}`)
},
"POST /exec/456/start": func(w http.ResponseWriter, r *http.Request) {
w.WriteHeader(200)
fmt.Fprint(w, "01234567890123456789OK") // more than 20 bytes
},
"GET /exec/456/json": func(w http.ResponseWriter, r *http.Request) {
w.WriteHeader(200)
w.Header().Set("Content-Type", "application/json")
fmt.Fprint(w, `{"ExitCode":0}`)
},
},
out: regexp.MustCompile("^Captured 20 of 22 bytes\n...\n234567890123456789OK$"),
state: api.HealthPassing,
},
{
desc: "inspect exec: exit code 1: warning",
handlers: map[string]http.HandlerFunc{
"POST /containers/123/exec": func(w http.ResponseWriter, r *http.Request) {
w.WriteHeader(201)
w.Header().Set("Content-Type", "application/json")
fmt.Fprint(w, `{"Id":"456"}`)
},
"POST /exec/456/start": func(w http.ResponseWriter, r *http.Request) {
w.WriteHeader(200)
fmt.Fprint(w, "WARN")
},
"GET /exec/456/json": func(w http.ResponseWriter, r *http.Request) {
w.WriteHeader(200)
w.Header().Set("Content-Type", "application/json")
fmt.Fprint(w, `{"ExitCode":1}`)
},
},
out: regexp.MustCompile("^WARN$"),
state: api.HealthWarning,
},
{
desc: "inspect exec: exit code 2: critical",
handlers: map[string]http.HandlerFunc{
"POST /containers/123/exec": func(w http.ResponseWriter, r *http.Request) {
w.WriteHeader(201)
w.Header().Set("Content-Type", "application/json")
fmt.Fprint(w, `{"Id":"456"}`)
},
"POST /exec/456/start": func(w http.ResponseWriter, r *http.Request) {
w.WriteHeader(200)
fmt.Fprint(w, "NOK")
},
"GET /exec/456/json": func(w http.ResponseWriter, r *http.Request) {
w.WriteHeader(200)
w.Header().Set("Content-Type", "application/json")
fmt.Fprint(w, `{"ExitCode":2}`)
},
},
out: regexp.MustCompile("^NOK$"),
state: api.HealthCritical,
},
}
for _, tt := range tests {
t.Run(tt.desc, func(t *testing.T) {
srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
x := r.Method + " " + r.RequestURI
h := tt.handlers[x]
if h == nil {
t.Fatalf("bad url %s", x)
}
h(w, r)
}))
defer srv.Close()
// create a docker client with a tiny output buffer
// to test the truncation
c, err := NewDockerClient(srv.URL, 20)
if err != nil {
t.Fatal(err)
}
notif, upd := mock.NewNotifyChan()
id := types.CheckID("chk")
check := &CheckDocker{
Notify: notif,
CheckID: id,
ScriptArgs: []string{"/health.sh"},
DockerContainerID: "123",
Interval: 25 * time.Millisecond,
Client: c,
}
check.Start()
defer check.Stop()
<-upd // wait for update
if got, want := notif.Output(id), tt.out; !want.MatchString(got) {
t.Fatalf("got %q want %q", got, want)
}
if got, want := notif.State(id), tt.state; got != want {
t.Fatalf("got status %q want %q", got, want)
}
})
}
}