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container_stats_test.go
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container_stats_test.go
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package docker
import (
"encoding/json"
"net/http"
"net/http/httptest"
"net/url"
"reflect"
"testing"
)
func TestStats(t *testing.T) {
t.Parallel()
jsonStats1 := `{
"read" : "2015-01-08T22:57:31.547920715Z",
"network" : {
"rx_dropped" : 0,
"rx_bytes" : 648,
"rx_errors" : 0,
"tx_packets" : 8,
"tx_dropped" : 0,
"rx_packets" : 8,
"tx_errors" : 0,
"tx_bytes" : 648
},
"networks" : {
"eth0":{
"rx_dropped" : 0,
"rx_bytes" : 648,
"rx_errors" : 0,
"tx_packets" : 8,
"tx_dropped" : 0,
"rx_packets" : 8,
"tx_errors" : 0,
"tx_bytes" : 648
}
},
"memory_stats" : {
"stats" : {
"total_pgmajfault" : 0,
"cache" : 0,
"mapped_file" : 0,
"total_inactive_file" : 0,
"pgpgout" : 414,
"rss" : 6537216,
"total_mapped_file" : 0,
"writeback" : 0,
"unevictable" : 0,
"pgpgin" : 477,
"total_unevictable" : 0,
"pgmajfault" : 0,
"total_rss" : 6537216,
"total_rss_huge" : 6291456,
"total_writeback" : 0,
"total_inactive_anon" : 0,
"rss_huge" : 6291456,
"hierarchical_memory_limit": 189204833,
"total_pgfault" : 964,
"total_active_file" : 0,
"active_anon" : 6537216,
"total_active_anon" : 6537216,
"total_pgpgout" : 414,
"total_cache" : 0,
"inactive_anon" : 0,
"active_file" : 0,
"pgfault" : 964,
"inactive_file" : 0,
"total_pgpgin" : 477,
"swap" : 47312896,
"hierarchical_memsw_limit" : 1610612736
},
"max_usage" : 6651904,
"usage" : 6537216,
"failcnt" : 0,
"limit" : 67108864
},
"blkio_stats": {
"io_service_bytes_recursive": [
{
"major": 8,
"minor": 0,
"op": "Read",
"value": 428795731968
},
{
"major": 8,
"minor": 0,
"op": "Write",
"value": 388177920
}
],
"io_serviced_recursive": [
{
"major": 8,
"minor": 0,
"op": "Read",
"value": 25994442
},
{
"major": 8,
"minor": 0,
"op": "Write",
"value": 1734
}
],
"io_queue_recursive": [],
"io_service_time_recursive": [],
"io_wait_time_recursive": [],
"io_merged_recursive": [],
"io_time_recursive": [],
"sectors_recursive": []
},
"cpu_stats" : {
"cpu_usage" : {
"percpu_usage" : [
16970827,
1839451,
7107380,
10571290
],
"usage_in_usermode" : 10000000,
"total_usage" : 36488948,
"usage_in_kernelmode" : 20000000
},
"system_cpu_usage" : 20091722000000000,
"online_cpus": 4
},
"precpu_stats" : {
"cpu_usage" : {
"percpu_usage" : [
16970827,
1839451,
7107380,
10571290
],
"usage_in_usermode" : 10000000,
"total_usage" : 36488948,
"usage_in_kernelmode" : 20000000
},
"system_cpu_usage" : 20091722000000000,
"online_cpus": 4
}
}`
// 1 second later, cache is 100
jsonStats2 := `{
"read" : "2015-01-08T22:57:32.547920715Z",
"networks" : {
"eth0":{
"rx_dropped" : 0,
"rx_bytes" : 648,
"rx_errors" : 0,
"tx_packets" : 8,
"tx_dropped" : 0,
"rx_packets" : 8,
"tx_errors" : 0,
"tx_bytes" : 648
}
},
"memory_stats" : {
"stats" : {
"total_pgmajfault" : 0,
"cache" : 100,
"mapped_file" : 0,
"total_inactive_file" : 0,
"pgpgout" : 414,
"rss" : 6537216,
"total_mapped_file" : 0,
"writeback" : 0,
"unevictable" : 0,
"pgpgin" : 477,
"total_unevictable" : 0,
"pgmajfault" : 0,
"total_rss" : 6537216,
"total_rss_huge" : 6291456,
"total_writeback" : 0,
"total_inactive_anon" : 0,
"rss_huge" : 6291456,
"total_pgfault" : 964,
"total_active_file" : 0,
"active_anon" : 6537216,
"total_active_anon" : 6537216,
"total_pgpgout" : 414,
"total_cache" : 0,
"inactive_anon" : 0,
"active_file" : 0,
"pgfault" : 964,
"inactive_file" : 0,
"total_pgpgin" : 477,
"swap" : 47312896,
"hierarchical_memsw_limit" : 1610612736
},
"max_usage" : 6651904,
"usage" : 6537216,
"failcnt" : 0,
"limit" : 67108864
},
"blkio_stats": {
"io_service_bytes_recursive": [
{
"major": 8,
"minor": 0,
"op": "Read",
"value": 428795731968
},
{
"major": 8,
"minor": 0,
"op": "Write",
"value": 388177920
}
],
"io_serviced_recursive": [
{
"major": 8,
"minor": 0,
"op": "Read",
"value": 25994442
},
{
"major": 8,
"minor": 0,
"op": "Write",
"value": 1734
}
],
"io_queue_recursive": [],
"io_service_time_recursive": [],
"io_wait_time_recursive": [],
"io_merged_recursive": [],
"io_time_recursive": [],
"sectors_recursive": []
},
"cpu_stats" : {
"cpu_usage" : {
"percpu_usage" : [
16970827,
1839451,
7107380,
10571290
],
"usage_in_usermode" : 10000000,
"total_usage" : 36488948,
"usage_in_kernelmode" : 20000000
},
"system_cpu_usage" : 20091722000000000,
"online_cpus": 4
},
"precpu_stats" : {
"cpu_usage" : {
"percpu_usage" : [
16970827,
1839451,
7107380,
10571290
],
"usage_in_usermode" : 10000000,
"total_usage" : 36488948,
"usage_in_kernelmode" : 20000000
},
"system_cpu_usage" : 20091722000000000,
"online_cpus": 4
}
}`
var expected1 Stats
var expected2 Stats
err := json.Unmarshal([]byte(jsonStats1), &expected1)
if err != nil {
t.Fatal(err)
}
err = json.Unmarshal([]byte(jsonStats2), &expected2)
if err != nil {
t.Fatal(err)
}
id := "4fa6e0f0"
var req http.Request
server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
w.Header().Set("Content-Type", "application/json")
w.Write([]byte(jsonStats1))
w.Write([]byte(jsonStats2))
req = *r
}))
defer server.Close()
client, _ := NewClient(server.URL)
client.SkipServerVersionCheck = true
errC := make(chan error, 1)
statsC := make(chan *Stats)
done := make(chan bool)
defer close(done)
go func() {
errC <- client.Stats(StatsOptions{ID: id, Stats: statsC, Stream: true, Done: done})
close(errC)
}()
var resultStats []*Stats
for {
stats, ok := <-statsC
if !ok {
break
}
resultStats = append(resultStats, stats)
}
err = <-errC
if err != nil {
t.Fatal(err)
}
if len(resultStats) != 2 {
t.Fatalf("Stats: Expected 2 results. Got %d.", len(resultStats))
}
if !reflect.DeepEqual(resultStats[0], &expected1) {
t.Errorf("Stats: Expected:\n%+v\nGot:\n%+v", expected1, resultStats[0])
}
if !reflect.DeepEqual(resultStats[1], &expected2) {
t.Errorf("Stats: Expected:\n%+v\nGot:\n%+v", expected2, resultStats[1])
}
if req.Method != http.MethodGet {
t.Errorf("Stats: wrong HTTP method. Want GET. Got %s.", req.Method)
}
u, _ := url.Parse(client.getURL("/containers/" + id + "/stats"))
if req.URL.Path != u.Path {
t.Errorf("Stats: wrong HTTP path. Want %q. Got %q.", u.Path, req.URL.Path)
}
}
func TestStatsContainerNotFound(t *testing.T) {
t.Parallel()
client := newTestClient(&FakeRoundTripper{message: "no such container", status: http.StatusNotFound})
statsC := make(chan *Stats)
done := make(chan bool)
defer close(done)
err := client.Stats(StatsOptions{ID: "abef348", Stats: statsC, Stream: true, Done: done})
expectNoSuchContainer(t, "abef348", err)
}