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lib/promscrape/discovery/docker: support host networking mode

Browse Source 
See https://github.com/prometheus/prometheus/issues/9116
This commit is contained in:
Aliaksandr Valialkin 2021-09-13 13:30:13 +03:00
parent 6ed9f10da5
commit b684624f67
5 changed files with 135 additions and 11 deletions
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1
docs/CHANGELOG.md
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@ -21,6 +21,7 @@ sort: 15
* BUGFIX: vmselect: reset connection timeouts after each request to `vmstorage`. This should prevent from `cannot read data in 0.000 seconds: unexpected EOF` warning in logs. See [this issue](https://github.com/VictoriaMetrics/VictoriaMetrics/issues/1562). Thanks to @mxlxm .
* BUGFIX: keep metric name for time series returned from [rollup_candlestick](https://docs.victoriametrics.com/MetricsQL.html#rollup_candlestick) function, since the returned series don't change the meaning of the original series. See [this issue](https://github.com/VictoriaMetrics/VictoriaMetrics/issues/1600).
* BUGFIX: vmagent: properly use `https` scheme for wildcard TLS certificates for `role: ingress` targets in Kubernetes service discovery. See [this issue](https://github.com/prometheus/prometheus/issues/8902).
* BUGFIX: vmagent: support host networking mode for `docker_sd_config`. See [this issue](https://github.com/prometheus/prometheus/issues/9116).
## [v1.65.0](https://github.com/VictoriaMetrics/VictoriaMetrics/releases/tag/v1.65.0)

14
lib/promscrape/discovery/docker/api.go
View File

@ -13,8 +13,9 @@ import (
var configMap = discoveryutils.NewConfigMap()
type apiConfig struct {
client *discoveryutils.Client
port int
client *discoveryutils.Client
port int
hostNetworkingHost string
// filtersQueryArg contains escaped `filters` query arg to add to each request to Docker Swarm API.
filtersQueryArg string
@ -29,9 +30,14 @@ func getAPIConfig(sdc *SDConfig, baseDir string) (*apiConfig, error) {
}
func newAPIConfig(sdc *SDConfig, baseDir string) (*apiConfig, error) {
hostNetworkingHost := sdc.HostNetworkingHost
if hostNetworkingHost == "" {
hostNetworkingHost = "localhost"
}
cfg := &apiConfig{
port: sdc.Port,
filtersQueryArg: getFiltersQueryArg(sdc.Filters),
port: sdc.Port,
hostNetworkingHost: hostNetworkingHost,
filtersQueryArg: getFiltersQueryArg(sdc.Filters),
}
if cfg.port == 0 {
cfg.port = 80

10
lib/promscrape/discovery/docker/container.go
View File

@ -39,7 +39,7 @@ func getContainersLabels(cfg *apiConfig) ([]map[string]string, error) {
if err != nil {
return nil, err
}
return addContainersLabels(containers, networkLabels, cfg.port), nil
return addContainersLabels(containers, networkLabels, cfg.port, cfg.hostNetworkingHost), nil
}
func getContainers(cfg *apiConfig) ([]container, error) {
@ -58,7 +58,7 @@ func parseContainers(data []byte) ([]container, error) {
return containers, nil
}
func addContainersLabels(containers []container, networkLabels map[string]map[string]string, defaultPort int) []map[string]string {
func addContainersLabels(containers []container, networkLabels map[string]map[string]string, defaultPort int, hostNetworkingHost string) []map[string]string {
var ms []map[string]string
for i := range containers {
c := &containers[i]
@ -86,8 +86,12 @@ func addContainersLabels(containers []container, networkLabels map[string]map[st
}
if !added {
// Use fallback port when no exposed ports are available or if all are non-TCP
addr := hostNetworkingHost
if c.HostConfig.NetworkMode != "host" {
addr = discoveryutils.JoinHostPort(n.IPAddress, defaultPort)
}
m := map[string]string{
"__address__": discoveryutils.JoinHostPort(n.IPAddress, defaultPort),
"__address__": addr,
"__meta_docker_network_ip": n.IPAddress,
}
addCommonLabels(m, c, networkLabels[n.NetworkID])

114
lib/promscrape/discovery/docker/container_test.go
View File

@ -317,6 +317,118 @@ func Test_addContainerLabels(t *testing.T) {
want []map[string]string
wantErr bool
}{
{
name: "NetworkMode!=host",
c: container{
ID: "90bc3b31aa13da5c0b11af2e228d54b38428a84e25d4e249ae9e9c95e51a0700",
Names: []string{"/crow-server"},
Labels: map[string]string{
"com.docker.compose.config-hash": "c9f0bd5bb31921f94cff367d819a30a0cc08d4399080897a6c5cd74b983156ec",
"com.docker.compose.container-number": "1",
"com.docker.compose.oneoff": "False",
"com.docker.compose.project": "crowserver",
"com.docker.compose.service": "crow-server",
"com.docker.compose.version": "1.11.2",
},
HostConfig: struct {
NetworkMode string
}{
NetworkMode: "bridge",
},
NetworkSettings: struct {
Networks map[string]struct {
IPAddress string
NetworkID string
}
}{
Networks: map[string]struct {
IPAddress string
NetworkID string
}{
"host": {
IPAddress: "172.17.0.2",
NetworkID: "1dd8d1a8bef59943345c7231d7ce8268333ff5a8c5b3c94881e6b4742b447634",
},
},
},
},
want: []map[string]string{
{
"__address__": "172.17.0.2:8012",
"__meta_docker_container_id": "90bc3b31aa13da5c0b11af2e228d54b38428a84e25d4e249ae9e9c95e51a0700",
"__meta_docker_container_label_com_docker_compose_config_hash": "c9f0bd5bb31921f94cff367d819a30a0cc08d4399080897a6c5cd74b983156ec",
"__meta_docker_container_label_com_docker_compose_container_number": "1",
"__meta_docker_container_label_com_docker_compose_oneoff": "False",
"__meta_docker_container_label_com_docker_compose_project": "crowserver",
"__meta_docker_container_label_com_docker_compose_service": "crow-server",
"__meta_docker_container_label_com_docker_compose_version": "1.11.2",
"__meta_docker_container_name": "/crow-server",
"__meta_docker_container_network_mode": "bridge",
"__meta_docker_network_id": "1dd8d1a8bef59943345c7231d7ce8268333ff5a8c5b3c94881e6b4742b447634",
"__meta_docker_network_ingress": "false",
"__meta_docker_network_internal": "false",
"__meta_docker_network_ip": "172.17.0.2",
"__meta_docker_network_name": "bridge",
"__meta_docker_network_scope": "local",
},
},
},
{
name: "NetworkMode=host",
c: container{
ID: "90bc3b31aa13da5c0b11af2e228d54b38428a84e25d4e249ae9e9c95e51a0700",
Names: []string{"/crow-server"},
Labels: map[string]string{
"com.docker.compose.config-hash": "c9f0bd5bb31921f94cff367d819a30a0cc08d4399080897a6c5cd74b983156ec",
"com.docker.compose.container-number": "1",
"com.docker.compose.oneoff": "False",
"com.docker.compose.project": "crowserver",
"com.docker.compose.service": "crow-server",
"com.docker.compose.version": "1.11.2",
},
HostConfig: struct {
NetworkMode string
}{
NetworkMode: "host",
},
NetworkSettings: struct {
Networks map[string]struct {
IPAddress string
NetworkID string
}
}{
Networks: map[string]struct {
IPAddress string
NetworkID string
}{
"host": {
IPAddress: "172.17.0.2",
NetworkID: "1dd8d1a8bef59943345c7231d7ce8268333ff5a8c5b3c94881e6b4742b447634",
},
},
},
},
want: []map[string]string{
{
"__address__": "foobar",
"__meta_docker_container_id": "90bc3b31aa13da5c0b11af2e228d54b38428a84e25d4e249ae9e9c95e51a0700",
"__meta_docker_container_label_com_docker_compose_config_hash": "c9f0bd5bb31921f94cff367d819a30a0cc08d4399080897a6c5cd74b983156ec",
"__meta_docker_container_label_com_docker_compose_container_number": "1",
"__meta_docker_container_label_com_docker_compose_oneoff": "False",
"__meta_docker_container_label_com_docker_compose_project": "crowserver",
"__meta_docker_container_label_com_docker_compose_service": "crow-server",
"__meta_docker_container_label_com_docker_compose_version": "1.11.2",
"__meta_docker_container_name": "/crow-server",
"__meta_docker_container_network_mode": "host",
"__meta_docker_network_id": "1dd8d1a8bef59943345c7231d7ce8268333ff5a8c5b3c94881e6b4742b447634",
"__meta_docker_network_ingress": "false",
"__meta_docker_network_internal": "false",
"__meta_docker_network_ip": "172.17.0.2",
"__meta_docker_network_name": "bridge",
"__meta_docker_network_scope": "local",
},
},
},
{
name: "get labels from a container",
c: container{
@ -391,7 +503,7 @@ func Test_addContainerLabels(t *testing.T) {
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
labelsMap := addContainersLabels([]container{tt.c}, networkLabels, 80)
labelsMap := addContainersLabels([]container{tt.c}, networkLabels, 8012, "foobar")
if (err != nil) != tt.wantErr {
t.Errorf("addContainersLabels() error = %v, wantErr %v", err, tt.wantErr)
return

7
lib/promscrape/discovery/docker/docker.go
View File

@ -18,9 +18,10 @@ var SDCheckInterval = flag.Duration("promscrape.dockerSDCheckInterval", 30*time.
//
// See https://prometheus.io/docs/prometheus/latest/configuration/configuration/#docker_sd_config
type SDConfig struct {
Host string `yaml:"host"`
Port int `yaml:"port,omitempty"`
Filters []Filter `yaml:"filters,omitempty"`
Host string `yaml:"host"`
Port int `yaml:"port,omitempty"`
Filters []Filter `yaml:"filters,omitempty"`
HostNetworkingHost string `yaml:"host_networking_host,omitempty"`
HTTPClientConfig promauth.HTTPClientConfig `yaml:",inline"`
ProxyURL proxy.URL `yaml:"proxy_url,omitempty"`