92 lines
2.2 KiB
Go
92 lines
2.2 KiB
Go
package docker
|
|
|
|
import (
|
|
"context"
|
|
"time"
|
|
|
|
"github.com/hashicorp/nomad/plugins/drivers"
|
|
)
|
|
|
|
func (d *Driver) Fingerprint(ctx context.Context) (<-chan *drivers.Fingerprint, error) {
|
|
ch := make(chan *drivers.Fingerprint)
|
|
go d.handleFingerprint(ctx, ch)
|
|
return ch, nil
|
|
}
|
|
|
|
func (d *Driver) handleFingerprint(ctx context.Context, ch chan *drivers.Fingerprint) {
|
|
defer close(ch)
|
|
ticker := time.NewTimer(0)
|
|
for {
|
|
select {
|
|
case <-ctx.Done():
|
|
return
|
|
case <-d.ctx.Done():
|
|
return
|
|
case <-ticker.C:
|
|
ticker.Reset(fingerprintPeriod)
|
|
ch <- d.buildFingerprint()
|
|
}
|
|
}
|
|
}
|
|
|
|
func (d *Driver) buildFingerprint() *drivers.Fingerprint {
|
|
fp := &drivers.Fingerprint{
|
|
Attributes: map[string]string{},
|
|
Health: drivers.HealthStateHealthy,
|
|
HealthDescription: "healthy",
|
|
}
|
|
client, _, err := d.dockerClients()
|
|
if err != nil {
|
|
d.logger.Info("failed to initialize client", "error", err)
|
|
return &drivers.Fingerprint{
|
|
Health: drivers.HealthStateUndetected,
|
|
HealthDescription: "failed to initialize docker client",
|
|
}
|
|
}
|
|
|
|
env, err := client.Version()
|
|
if err != nil {
|
|
d.logger.Debug("could not connect to docker daemon", "endpoint", client.Endpoint(), "error", err)
|
|
return &drivers.Fingerprint{
|
|
Health: drivers.HealthStateUnhealthy,
|
|
HealthDescription: "failed to connect to docker daemon",
|
|
}
|
|
}
|
|
|
|
fp.Attributes["driver.docker"] = "1"
|
|
fp.Attributes["driver.docker.version"] = env.Get("Version")
|
|
if d.config.AllowPrivileged {
|
|
fp.Attributes["driver.docker.privileged.enabled"] = "1"
|
|
}
|
|
|
|
if d.config.VolumesEnabled {
|
|
fp.Attributes["driver.docker.volumes.enabled"] = "1"
|
|
}
|
|
|
|
if nets, err := client.ListNetworks(); err != nil {
|
|
d.logger.Warn("error discovering bridge IP", "error", err)
|
|
} else {
|
|
for _, n := range nets {
|
|
if n.Name != "bridge" {
|
|
continue
|
|
}
|
|
|
|
if len(n.IPAM.Config) == 0 {
|
|
d.logger.Warn("no IPAM config for bridge network")
|
|
break
|
|
}
|
|
|
|
if n.IPAM.Config[0].Gateway != "" {
|
|
fp.Attributes["driver.docker.bridge_ip"] = n.IPAM.Config[0].Gateway
|
|
} else {
|
|
// Docker 17.09.0-ce dropped the Gateway IP from the bridge network
|
|
// See https://github.com/moby/moby/issues/32648
|
|
d.logger.Debug("bridge_ip could not be discovered")
|
|
}
|
|
break
|
|
}
|
|
}
|
|
|
|
return fp
|
|
}
|