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discovery/kubernetes: add container image as metadata

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This commits adds a __meta_kubernetes_pod_container_image as a new
metadata label. This can be used to alert on mismatched versions of
targets who don't have a build_info metric, as well as injecting it into
log lines for other consumers of discovery/kubernetes (e.g., Promtail).

Signed-off-by: Robert Fratto <robertfratto@gmail.com>
This commit is contained in:
Robert Fratto 2022-07-18 08:31:45 -04:00
parent 95b7d058ac
commit 823d24d1e9
3 changed files with 10 additions and 3 deletions
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2
discovery/kubernetes/endpoints.go
View file

@ -322,6 +322,7 @@ func (e *Endpoints) buildEndpoints(eps *apiv1.Endpoints) *targetgroup.Group {
ports := strconv.FormatUint(uint64(port.Port), 10)
target[podContainerNameLabel] = lv(c.Name)
target[podContainerImageLabel] = lv(c.Image)
target[podContainerPortNameLabel] = lv(cport.Name)
target[podContainerPortNumberLabel] = lv(ports)
target[podContainerPortProtocolLabel] = lv(string(port.Protocol))
@ -380,6 +381,7 @@ func (e *Endpoints) buildEndpoints(eps *apiv1.Endpoints) *targetgroup.Group {
target := model.LabelSet{
model.AddressLabel: lv(a),
podContainerNameLabel: lv(c.Name),
podContainerImageLabel: lv(c.Image),
podContainerPortNameLabel: lv(cport.Name),
podContainerPortNumberLabel: lv(ports),
podContainerPortProtocolLabel: lv(string(cport.Protocol)),

2
discovery/kubernetes/endpointslice.go
View file

@ -350,6 +350,7 @@ func (e *EndpointSlice) buildEndpointSlice(eps endpointSliceAdaptor) *targetgrou
ports := strconv.FormatUint(uint64(*port.port()), 10)
target[podContainerNameLabel] = lv(c.Name)
target[podContainerImageLabel] = lv(c.Image)
target[podContainerPortNameLabel] = lv(cport.Name)
target[podContainerPortNumberLabel] = lv(ports)
target[podContainerPortProtocolLabel] = lv(string(cport.Protocol))
@ -398,6 +399,7 @@ func (e *EndpointSlice) buildEndpointSlice(eps endpointSliceAdaptor) *targetgrou
target := model.LabelSet{
model.AddressLabel: lv(a),
podContainerNameLabel: lv(c.Name),
podContainerImageLabel: lv(c.Image),
podContainerPortNameLabel: lv(cport.Name),
podContainerPortNumberLabel: lv(ports),
podContainerPortProtocolLabel: lv(string(cport.Protocol)),

9
discovery/kubernetes/pod.go
View file

@ -177,6 +177,7 @@ const (
podNameLabel = metaLabelPrefix + "pod_name"
podIPLabel = metaLabelPrefix + "pod_ip"
podContainerNameLabel = metaLabelPrefix + "pod_container_name"
podContainerImageLabel = metaLabelPrefix + "pod_container_image"
podContainerPortNameLabel = metaLabelPrefix + "pod_container_port_name"
podContainerPortNumberLabel = metaLabelPrefix + "pod_container_port_number"
podContainerPortProtocolLabel = metaLabelPrefix + "pod_container_port_protocol"
@ -266,9 +267,10 @@ func (p *Pod) buildPod(pod *apiv1.Pod) *targetgroup.Group {
// We don't have a port so we just set the address label to the pod IP.
// The user has to add a port manually.
tg.Targets = append(tg.Targets, model.LabelSet{
model.AddressLabel: lv(pod.Status.PodIP),
podContainerNameLabel: lv(c.Name),
podContainerIsInit: lv(strconv.FormatBool(isInit)),
model.AddressLabel: lv(pod.Status.PodIP),
podContainerNameLabel: lv(c.Name),
podContainerImageLabel: lv(c.Image),
podContainerIsInit: lv(strconv.FormatBool(isInit)),
})
continue
}
@ -280,6 +282,7 @@ func (p *Pod) buildPod(pod *apiv1.Pod) *targetgroup.Group {
tg.Targets = append(tg.Targets, model.LabelSet{
model.AddressLabel: lv(addr),
podContainerNameLabel: lv(c.Name),
podContainerImageLabel: lv(c.Image),
podContainerPortNumberLabel: lv(ports),
podContainerPortNameLabel: lv(port.Name),
podContainerPortProtocolLabel: lv(string(port.Protocol)),