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junos.go
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junos.go
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package codecommunicator
import (
"context"
"fmt"
"regexp"
"strings"
"github.com/RincewindsHat/thola/internal/device"
"github.com/RincewindsHat/thola/internal/deviceclass/groupproperty"
"github.com/RincewindsHat/thola/internal/network"
"github.com/pkg/errors"
"github.com/rs/zerolog/log"
)
type junosCommunicator struct {
codeCommunicator
}
func (c *junosCommunicator) GetInterfaces(ctx context.Context, filter ...groupproperty.Filter) ([]device.Interface, error) {
interfaces, err := c.deviceClass.GetInterfaces(ctx, filter...)
if err != nil {
return nil, err
}
if groupproperty.CheckValueFiltersMatch(filter, []string{"vlan"}) {
log.Ctx(ctx).Debug().Msg("filter matched on 'vlan', skipping junos vlan values")
return interfaces, nil
}
log.Ctx(ctx).Debug().Msg("reading junos vlan values")
interfacesWithVLANs, err := c.addVLANsNonELS(ctx, interfaces)
if err != nil {
log.Ctx(ctx).Debug().Err(err).Msg("getting juniper VLANs for non ELS devices failed, trying for ELS devices")
interfacesWithVLANs, err = c.addVLANsELS(ctx, interfaces)
if err != nil {
log.Ctx(ctx).Debug().Err(err).Msg("getting juniper VLANs for ELS devices failed, skipping VLANs")
interfacesWithVLANs = interfaces
}
}
return filterInterfaces(ctx, interfacesWithVLANs, filter)
}
func (c *junosCommunicator) addVLANsELS(ctx context.Context, interfaces []device.Interface) ([]device.Interface, error) {
con, ok := network.DeviceConnectionFromContext(ctx)
if !ok || con.SNMP == nil {
return nil, errors.New("snmp client is empty")
}
// jnxL2aldVlanFdbId
res, err := con.SNMP.SnmpClient.SNMPWalk(ctx, "1.3.6.1.4.1.2636.3.48.1.3.1.1.5")
if err != nil {
return nil, errors.Wrap(err, "failed to get jnxL2aldVlanFdbId")
}
vlanIndexFilterID := make(map[string]string)
for _, response := range res {
filterID, err := response.GetValue()
if err != nil {
return nil, err
}
oid := response.GetOID()
oidSplit := strings.Split(oid.String(), ".")
vlanIndexFilterID[oidSplit[len(oidSplit)-1]] = filterID.String()
}
// jnxL2aldVlanName
res, err = con.SNMP.SnmpClient.SNMPWalk(ctx, "1.3.6.1.4.1.2636.3.48.1.3.1.1.2")
if err != nil {
return nil, errors.Wrap(err, "failed to get jnxL2aldVlanName")
}
filterIDVLAN := make(map[string]device.VLAN)
for _, response := range res {
name, err := response.GetValue()
if err != nil {
return nil, err
}
oid := response.GetOID()
oidSplit := strings.Split(oid.String(), ".")
filterID := vlanIndexFilterID[oidSplit[len(oidSplit)-1]]
nameString := name.String()
filterIDVLAN[filterID] = device.VLAN{
Name: &nameString,
}
}
portIfIndex, err := c.getPortIfIndexMapping(ctx)
if err != nil {
return nil, err
}
// dot1qTpFdbPort
dot1qTpFdbPort := network.OID("1.3.6.1.2.1.17.7.1.2.2.1.2")
res, err = con.SNMP.SnmpClient.SNMPWalk(ctx, dot1qTpFdbPort)
if err != nil {
return nil, errors.Wrap(err, "failed to get dot1qTpFdbPort")
}
ifIndexFilterIDs := make(map[string][]string)
out:
for _, response := range res {
port, err := response.GetValue()
if err != nil {
return nil, err
}
oid := strings.TrimPrefix(response.GetOID().String(), ".")
oidSplit := strings.Split(strings.TrimPrefix(strings.TrimPrefix(oid, dot1qTpFdbPort.String()), "."), ".")
ifIndex := portIfIndex[port.String()]
for _, filterID := range ifIndexFilterIDs[ifIndex] {
if filterID == oidSplit[0] {
continue out
}
}
ifIndexFilterIDs[ifIndex] = append(ifIndexFilterIDs[ifIndex], oidSplit[0])
}
for i, interf := range interfaces {
if interf.IfIndex != nil {
if filterIDs, ok := ifIndexFilterIDs[fmt.Sprint(*interf.IfIndex)]; ok {
for _, filterID := range filterIDs {
if vlan, ok := filterIDVLAN[filterID]; ok {
if interfaces[i].VLAN == nil {
interfaces[i].VLAN = &device.VLANInformation{}
}
interfaces[i].VLAN.VLANs = append(interfaces[i].VLAN.VLANs, vlan)
}
}
}
}
}
return interfaces, nil
}
func (c *junosCommunicator) addVLANsNonELS(ctx context.Context, interfaces []device.Interface) ([]device.Interface, error) {
con, ok := network.DeviceConnectionFromContext(ctx)
if !ok || con.SNMP == nil {
return nil, errors.New("snmp client is empty")
}
// jnxExVlanPortStatus
res, err := con.SNMP.SnmpClient.SNMPWalk(ctx, "1.3.6.1.4.1.2636.3.40.1.5.1.7.1.3")
if err != nil {
return nil, errors.Wrap(err, "failed to get jnxExVlanPortStatus")
}
portIfIndex, err := c.getPortIfIndexMapping(ctx)
if err != nil {
return nil, err
}
vlanIndexVLAN := make(map[string]device.VLAN)
ifIndexVLANIndices := make(map[string][]string)
for _, response := range res {
status, err := response.GetValue()
if err != nil {
return nil, err
}
statusString := status.String()
oid := response.GetOID()
oidSplit := strings.Split(oid.String(), ".")
ifIndex := portIfIndex[oidSplit[len(oidSplit)-1]]
ifIndexVLANIndices[ifIndex] = append(ifIndexVLANIndices[ifIndex], oidSplit[len(oidSplit)-2])
vlanIndexVLAN[oidSplit[len(oidSplit)-2]] = device.VLAN{
Status: &statusString,
}
}
// jnxExVlanName
res, err = con.SNMP.SnmpClient.SNMPWalk(ctx, "1.3.6.1.4.1.2636.3.40.1.5.1.5.1.2")
if err != nil {
return nil, errors.Wrap(err, "failed to get jnxExVlanName")
}
for _, response := range res {
name, err := response.GetValue()
if err != nil {
return nil, err
}
oid := response.GetOID()
oidSplit := strings.Split(oid.String(), ".")
if vlan, ok := vlanIndexVLAN[oidSplit[len(oidSplit)-1]]; ok {
vlanName := name.String()
vlan.Name = &vlanName
vlanIndexVLAN[oidSplit[len(oidSplit)-1]] = vlan
}
}
for i, interf := range interfaces {
if interf.IfIndex != nil {
if vlanIndices, ok := ifIndexVLANIndices[fmt.Sprint(*interf.IfIndex)]; ok {
for _, vlanIndex := range vlanIndices {
if vlan, ok := vlanIndexVLAN[vlanIndex]; ok {
if interfaces[i].VLAN == nil {
interfaces[i].VLAN = &device.VLANInformation{}
}
interfaces[i].VLAN.VLANs = append(interfaces[i].VLAN.VLANs, vlan)
}
}
}
}
}
return interfaces, nil
}
func (c *junosCommunicator) getPortIfIndexMapping(ctx context.Context) (map[string]string, error) {
con, ok := network.DeviceConnectionFromContext(ctx)
if !ok || con.SNMP == nil {
return nil, errors.New("snmp client is empty")
}
// dot1dBasePortIfIndex
res, err := con.SNMP.SnmpClient.SNMPWalk(ctx, "1.3.6.1.2.1.17.1.4.1.2")
if err != nil {
return nil, errors.Wrap(err, "failed to get dot1dBasePortIfIndex")
}
portIfIndex := make(map[string]string)
for _, response := range res {
ifIndex, err := response.GetValue()
if err != nil {
return nil, err
}
oid := response.GetOID()
oidSplit := strings.Split(oid.String(), ".")
portIfIndex[oidSplit[len(oidSplit)-1]] = ifIndex.String()
}
return portIfIndex, nil
}
func (c *junosCommunicator) GetCPUComponentCPULoad(ctx context.Context) ([]device.CPU, error) {
indices, err := c.getRoutingEngineIndices(ctx)
if err != nil {
return nil, errors.Wrap(err, "failed to get routing indices")
}
con, ok := network.DeviceConnectionFromContext(ctx)
if !ok || con.SNMP == nil {
return nil, errors.New("no device connection available")
}
jnxOperatingCPUOID := network.OID(".1.3.6.1.4.1.2636.3.1.13.1.8")
var cpus []device.CPU
for i, index := range indices {
response, err := con.SNMP.SnmpClient.SNMPGet(ctx, jnxOperatingCPUOID.AddIndex(index.index))
if err != nil {
return nil, errors.Wrap(err, "failed to get CPU load")
} else if len(response) != 1 {
return nil, errors.New("invalid cpu load result")
}
res, err := response[0].GetValue()
if err != nil {
return nil, errors.Wrap(err, "failed to get string value of cpu load")
}
load, err := res.Float64()
if err != nil {
return nil, errors.Wrap(err, "failed to parse cpu load")
}
cpus = append(cpus, device.CPU{
Label: &indices[i].label,
Load: &load,
})
}
spuCpus, err := c.getSPUCPUs(ctx)
if err != nil {
log.Ctx(ctx).Debug().Err(err).Msg("failed to read out SPU CPU load")
} else {
cpus = append(cpus, spuCpus...)
}
return cpus, nil
}
type indexAndLabel struct {
index string
label string
}
func (c *junosCommunicator) getRoutingEngineIndices(ctx context.Context) ([]indexAndLabel, error) {
con, ok := network.DeviceConnectionFromContext(ctx)
if !ok || con.SNMP == nil {
return nil, errors.New("no device connection available")
}
jnxOperatingDescrOID := network.OID(".1.3.6.1.4.1.2636.3.1.13.1.5")
jnxOperatingDescr, err := con.SNMP.SnmpClient.SNMPWalk(ctx, jnxOperatingDescrOID)
if err != nil {
return nil, errors.Wrap(err, "failed to get 'jnxOperatingDescrOID'")
}
var indices []indexAndLabel
regex := regexp.MustCompile("(?i)engine")
for _, response := range jnxOperatingDescr {
res, err := response.GetValue()
if err != nil {
return nil, errors.Wrap(err, "failed to get string value of snmp response")
}
if ok = regex.MatchString(res.String()); ok {
indices = append(indices, indexAndLabel{
index: strings.TrimPrefix(response.GetOID().String(), jnxOperatingDescrOID.String()),
label: res.String(),
})
}
}
return indices, nil
}
func (c *junosCommunicator) getSPUCPUs(ctx context.Context) ([]device.CPU, error) {
con, ok := network.DeviceConnectionFromContext(ctx)
if !ok || con.SNMP == nil {
return nil, errors.New("no device connection available")
}
indexDescr, err := c.getSPUIndices(ctx)
if err != nil {
return nil, err
}
jnxJsSPUMonitoringCPUUsageOID := network.OID(".1.3.6.1.4.1.2636.3.39.1.12.1.1.1.4")
jnxJsSPUMonitoringCPUUsage, err := con.SNMP.SnmpClient.SNMPWalk(ctx, jnxJsSPUMonitoringCPUUsageOID)
if err != nil {
return nil, errors.Wrap(err, "failed to get 'jnxJsSPUMonitoringCPUUsage'")
}
var cpus []device.CPU
for _, load := range jnxJsSPUMonitoringCPUUsage {
res, err := load.GetValue()
if err != nil {
return nil, errors.Wrap(err, "failed to get string value of snmp response")
}
resParsed, err := res.Float64()
if err != nil {
return nil, errors.Wrap(err, "failed to parse snmp response")
}
cpu := device.CPU{Load: &resParsed}
if descr, ok := indexDescr[strings.TrimPrefix(load.GetOID().String(), jnxJsSPUMonitoringCPUUsageOID.String())]; ok {
label := "spu_" + descr
cpu.Label = &label
}
cpus = append(cpus, cpu)
}
return cpus, nil
}
func (c *junosCommunicator) getSPUIndices(ctx context.Context) (map[string]string, error) {
con, ok := network.DeviceConnectionFromContext(ctx)
if !ok || con.SNMP == nil {
return nil, errors.New("no device connection available")
}
jnxJsSPUMonitoringNodeDescrOID := network.OID(".1.3.6.1.4.1.2636.3.39.1.12.1.1.1.11")
jnxJsSPUMonitoringNodeDescr, err := con.SNMP.SnmpClient.SNMPWalk(ctx, jnxJsSPUMonitoringNodeDescrOID)
if err != nil {
return nil, errors.Wrap(err, "failed to get 'jnxJsSPUMonitoringNodeDescr'")
}
indexDescr := make(map[string]string)
for _, descr := range jnxJsSPUMonitoringNodeDescr {
res, err := descr.GetValue()
if err != nil {
return nil, errors.Wrap(err, "failed to get string value of snmp response")
}
indexDescr[strings.TrimPrefix(descr.GetOID().String(), jnxJsSPUMonitoringNodeDescrOID.String())] = res.String()
}
return indexDescr, nil
}
func (c *junosCommunicator) GetMemoryComponentMemoryUsage(ctx context.Context) ([]device.MemoryPool, error) {
con, ok := network.DeviceConnectionFromContext(ctx)
if !ok || con.SNMP == nil {
return nil, errors.New("no device connection available")
}
var pools []device.MemoryPool
// kernel memory used
kernelMemUsedRes, err := con.SNMP.SnmpClient.SNMPGet(ctx, "1.3.6.1.4.1.2636.3.1.16.0")
if err != nil {
return nil, errors.Wrap(err, "failed to read out kernel memory usage")
}
if len(kernelMemUsedRes) > 0 {
val, err := kernelMemUsedRes[0].GetValue()
if err != nil {
return nil, errors.Wrap(err, "failed to convert kernel memory usage to string")
}
f, err := val.Float64()
if err != nil {
return nil, errors.Wrap(err, "failed to convert kernel memory usage to float64")
}
label := "kernel"
pools = append(pools, device.MemoryPool{
Label: &label,
Usage: &f,
})
}
// engines
indices, err := c.getRoutingEngineIndices(ctx)
if err != nil {
return nil, errors.Wrap(err, "failed to get routing engine indices")
}
for i, index := range indices {
response, err := con.SNMP.SnmpClient.SNMPGet(ctx, network.OID(".1.3.6.1.4.1.2636.3.1.13.1.11").AddIndex(index.index))
if err != nil {
return nil, errors.Wrap(err, "failed to get memory usage")
} else if len(response) != 1 {
return nil, errors.New("invalid memory usage result")
}
res, err := response[0].GetValue()
if err != nil {
return nil, errors.Wrap(err, "failed to get string value of memory usage")
}
usage, err := res.Float64()
if err != nil {
return nil, errors.Wrap(err, "failed to parse memory usage")
}
pools = append(pools, device.MemoryPool{
Label: &indices[i].label,
Usage: &usage,
})
}
// spu
spuIndexDescr, err := c.getSPUIndices(ctx)
if err != nil {
log.Ctx(ctx).Debug().Err(err).Msg("failed to read out SPU memory usage")
} else {
spuOID := ".1.3.6.1.4.1.2636.3.39.1.12.1.1.1.5"
spuUsages, err := con.SNMP.SnmpClient.SNMPWalk(ctx, ".1.3.6.1.4.1.2636.3.39.1.12.1.1.1.5")
if err != nil {
return nil, errors.Wrap(err, "failed to get spu memory usages")
}
for _, res := range spuUsages {
resVal, err := res.GetValue()
if err != nil {
return nil, errors.Wrap(err, "failed to get string value of snmp response")
}
resParsed, err := resVal.Float64()
if err != nil {
return nil, errors.Wrap(err, "failed to parse snmp response")
}
pool := device.MemoryPool{Usage: &resParsed}
if descr, ok := spuIndexDescr[strings.TrimPrefix(res.GetOID().String(), spuOID)]; ok {
label := "spu_" + descr
pool.Label = &label
}
pools = append(pools, pool)
}
}
return pools, nil
}