These procedures are intended for trained technicians and support personnel only. Always follow ESD precautions when handling this equipment.
The example is this procedure adds a User Access Node (UAN) or compute node to an HPE Cray standard rack system. This example adds a node to rack number 3000 at U27.
Procedures for updating the Hardware State Manager (HSM) or System Layout Service (SLS) are similar when adding additional compute nodes or User Application Nodes (UANs). The contents of the node object in the SLS are slightly different for each node type.
Refer to the OEM documentation for information about the node architecture, installation, and cabling.
For this procedure, a new object must be created in the SLS and modifications will be required to the Slingshot HSN topology.
(ncn#) Retrieve an authentication token.
export TOKEN=$(curl -k -s -S -d grant_type=client_credentials \
-d client_id=admin-client \
-d client_secret=`kubectl get secrets admin-client-auth -o jsonpath='{.data.client-secret}' | base64 -d` \
https://api-gw-service-nmn.local/keycloak/realms/shasta/protocol/openid-connect/token | jq -r '.access_token')
(ncn#) Create a new node object in SLS.
New node objects require the following information:
Xname: The component name (xname) for the Node in the form of xXcCsSbBnN
xX: where X is the cabinet or rack identification number.cC: where C is the chassis identification number.
0.4.sS: where S is the lowest slot the node chassis occupies.bB: where B is the ordinal of the node BMC. This should be 0.nN: where N is the ordinal of the node This should be 0.Role: Compute or Application.
Aliases: Array of aliases for the node. For compute nodes, this is in the form of nid000000
NID: The Node ID integer for the node. This applies only to compute nodes.
SubRole: Such as UAN, Gateway, or other valid HSM SubRoles.
(
ncn#) Valid HSM SubRoles can be viewed with the following command. To add additional sub roles to HSM refer to Add Custom Roles and Subroles.cray hsm service values subrole list --format tomlExample output:
SubRole = [ "Visualization", "UserDefined", "Master", "Worker", "Storage", "UAN", "Gateway", "LNETRouter",]
(ncn#) If adding a compute node:
NID=1
ALIAS=nid000001
jq -n --arg ALIAS "${ALIAS}" --arg NID "${NID}" '{
Aliases:[$ALIAS],
NID: $NID,
Role: "Compute"
}' | tee node_extraproperties.json
Expected output:
{
"Aliases": [
"nid000001"
],
"NID": "1",
"Role": "Compute"
}
(ncn#) If adding a application node:
SUB_ROLE=UAN
ALIAS=uan04
jq -n --arg ALIAS "${ALIAS}" --arg SUB_ROLE "${SUB_ROLE}" '{
Aliases:[$ALIAS],
Role: "Application",
SubRole: $SUB_ROLE
}' | tee node_extraproperties.json
Expected output:
{
"Aliases": [
"uan04"
],
"Role": "Application",
"SubRole": "UAN"
}
Create the new object in SLS.
NODE_XNAME=x3000c0s27b0n0
cray sls hardware create --xname "${NODE_XNAME}" --class River --extra-properties "$(cat node_extraproperties.json)"
(ncn#) Create a new MgmtSwitchConnector object in SLS.
The MgmtSwitchConnector connector is used by the hms-discovery job to determine which management switch port is connected to the node’s BMC. The SLS requires the following information:
The management switch port that is connected to the new node’s BMC
Xname: The component name (xname) for the MgmtSwitchConnector in the form of xXcCwWjJ
xX: where X is the cabinet or rack identification number.cC: where C is the chassis identification number.
LeafBMC switch is within a standard rack, then this should be 0LeafBMC switch is located within an air-cooled chassis in an EX2500 cabinet, then this should be 4wW: where W is the rack U position of the management network leaf switchjJ: where J is the switch port numberNodeNics: The component name (xname) of the new node’s BMC; this field is an array in the payloads below, but should only contain one element
VendorName: This field varies depending on the OEM for the management switch; for example, if the BMC is plugged into switch port 36, then the following vendor names could apply:1/1/36ethernet1/1/36Build up the hardware extra properties:
BMC_XNAME=$(echo "${NODE_XNAME}" | grep -E -o 'x[0-9]+c[0-9]+s[0-9]+b[0-9]+')
VENDOR_NAME="1/1/36"
jq -n --arg BMC_XNAME "${BMC_XNAME}" --arg VENDOR_NAME "${VENDOR_NAME}" '{
NodeNics: [$BMC_XNAME],
VendorName: $VENDOR_NAME
}' | tee mgmt_switch_connector_extraproperties.json
Expected output:
{
"NodeNics": [
"x3000c0s27b0"
],
"VendorName": "1/1/36"
}
Create the new object in SLS.
MGMT_SWITCH_CONNECTOR_XNAME=x3000c0w14j36
cray sls hardware create --xname "${MGMT_SWITCH_CONNECTOR_XNAME}" --class River --extra-properties "$(cat mgmt_switch_connector_extraproperties.json)"
(ncn#) If adding a UAN application node, then remove the IP address reservation for the node in the CAN or CHN networks.
Node If the UAN is being replaced within the same rack slot, then this step can be skipped.
Perform a dry-run:
/usr/share/doc/csm/scripts/operations/node_management/allocate_uan_ip.py allocate-uan-ip \
--xname "${NODE_XNAME}"
Example output:
Performing validation checks against SLS
Called: GET https://api-gw-service-nmn.local/apis/sls/v1/hardware/x3000c0s19b0n0 with params None
Pass x3000c0s19b0n0 exists in SLS
Pass node x3000c0s19b0n0 has expected node Role of Application
Pass node x3000c0s19b0n0 has expected SubRole of UAN
Pass node x3000c0s19b0n0 has alias of uan01
WARNING: Gateway not in Subnet for uai_macvlan (possibly supernetting).
Called: GET https://api-gw-service-nmn.local/apis/sls/v1/networks with params None
Allocating UAN node IP address in network CAN
Allocated IP 10.102.4.144 on the CAN network
Pass x3000c0s19b0n0 (uan01) does not currently exist in SLS Networks
Pass allocated IPs for UAN Node x3000c0s19b0n0 (uan01) are not currently in use in SLS Networks
Skipping network CHN as it does not exist in SLS
Performing validation checks against HSM
Called: GET https://api-gw-service-nmn.local/apis/smd/hsm/v2/Inventory/EthernetInterfaces with params {'IPAddress': IPAddress('10.102.4.144')}
Pass CHN IP address 10.102.4.144 is not currently in use in HSM Ethernet Interfaces
Adding UAN IP reservation to bootstrap_dhcp subnet in the CAN network
{
"Name": "uan01",
"IPAddress": "10.102.4.144",
"Comment": "x3000c0s19b0n0"
}
Updating CAN network in SLS with updated IP reservations
Skipping due to dry run!
IP Addresses have been allocated for x3000c0s19b0n0 (uan01) and been added to SLS
Network | IP Address
--------|-----------
CAN | 10.102.4.144
Apply changes to SLS:
/usr/share/doc/csm/scripts/operations/node_management/allocate_uan_ip.py allocate-uan-ip \
--xname "${NODE_XNAME}" \
--perform-changes
Example output:
Performing validation checks against SLS
Called: GET https://api-gw-service-nmn.local/apis/sls/v1/hardware/x3000c0s19b0n0 with params None
Pass x3000c0s19b0n0 exists in SLS
Pass node x3000c0s19b0n0 has expected node Role of Application
Pass node x3000c0s19b0n0 has expected SubRole of UAN
Pass node x3000c0s19b0n0 has alias of uan01
WARNING: Gateway not in Subnet for uai_macvlan (possibly supernetting).
Called: GET https://api-gw-service-nmn.local/apis/sls/v1/networks with params None
Allocating UAN node IP address in network CAN
Allocated IP 10.102.4.144 on the CAN network
Pass x3000c0s19b0n0 (uan01) does not currently exist in SLS Networks
Pass allocated IPs for UAN Node x3000c0s19b0n0 (uan01) are not currently in use in SLS Networks
Skipping network CHN as it does not exist in SLS
Performing validation checks against HSM
Called: GET https://api-gw-service-nmn.local/apis/smd/hsm/v2/Inventory/EthernetInterfaces with params {'IPAddress': IPAddress('10.102.4.144')}
Pass CHN IP address 10.102.4.144 is not currently in use in HSM Ethernet Interfaces
Adding UAN IP reservation to bootstrap_dhcp subnet in the CAN network
{
"Name": "uan01",
"IPAddress": "10.102.4.144",
"Comment": "x3000c0s19b0n0"
}
Updating CAN network in SLS with updated IP reservations
Called: PUT https://api-gw-service-nmn.local/apis/sls/v1/networks/CAN with params None
IP Addresses have been allocated for x3000c0s19b0n0 (uan01) and been added to SLS
Network | IP Address
--------|-----------
CAN | 10.102.4.144
Repeat for each node present in the blade.
If adding an a Gigabyte dense compute node, then add the Gigabyte CMC data. Otherwise, for other node types this step can be skipped.
(ncn#) Set CMC_XNAME environment variable with the xname of the CMC.
The xname for the CMC in the form of xXcCsSbB
xX: where X is the cabinet or rack identification number.cC: where C is the chassis identification number.
0.4.sS: where S is the lowest slot the node chassis occupies.bB: where B is the ordinal of the node BMC. This should be 999.CMC_XNAME=x3000c0s17b999
(ncn#) Create a new CMC object in SLS.
Create the new object in SLS.
cray sls hardware create --xname "${CMC_XNAME}" --class River
(ncn#) Create a new MgmtSwitchConnector object in SLS.
The MgmtSwitchConnector connector is used by the hms-discovery job to determine which management switch port is connected to the node’s BMC. The SLS requires the following information:
The management switch port that is connected to the new node’s BMC
Xname: The component name (xname) for the MgmtSwitchConnector in the form of xXcCwWjJ
xX: where X is the cabinet or rack identification number.cC: where C is the chassis identification number.
LeafBMC switch is within a standard rack, then this should be 0LeafBMC switch is located within an air-cooled chassis in an EX2500 cabinet, then this should be 4wW: where W is the rack U position of the management network leaf switchjJ: where J is the switch port numberNodeNics: The component name (xname) of the new node’s BMC; this field is an array in the payloads below, but should only contain one element
VendorName: This field varies depending on the OEM for the management switch; for example, if the BMC is plugged into switch port 36, then the following vendor names could apply:1/1/37ethernet1/1/37Build up the hardware extra properties:
VENDOR_NAME="1/1/37"
jq -n --arg CMC_XNAME "${CMC_XNAME}" --arg VENDOR_NAME "${VENDOR_NAME}" '{
NodeNics: [$CMC_XNAME],
VendorName: $VENDOR_NAME
}' | tee cmc_mgmt_switch_connector_extraproperties.json
Expected output:
{
"NodeNics": [
"x3000c0s17b999"
],
"VendorName": "1/1/37"
}
Create the new object in SLS.
CMC_MGMT_SWITCH_CONNECTOR_XNAME=x3000c0w14j37
cray sls hardware create --xname "${CMC_MGMT_SWITCH_CONNECTOR_XNAME}" --class River --extra-properties "$(cat cmc_mgmt_switch_connector_extraproperties.json)"
Install the new node hardware in the rack and connect power cables, HSN cables, and management network cables (if it has not already been installed).
If the node was added before modifying the SLS, then the node’s BMC should have been able to DHCP with Kea, and there will be an unknown MAC address in the HSM Ethernet interfaces table.
Refer to the OEM documentation for the node for information about the hardware installation and cabling.
Follow the Added Hardware procedure in the Management network documentation.
When the node was installed into the rack the node will have powered on, and have started to attempt to DHCP.
Wait for the hms-discovery cronjob to run, and for DNS to update.
The hms-discovery cronjob will attempt to correctly identity the new node by comparing node and BMC MAC addresses from the HSM Ethernet interfaces table with the connection information present in SLS.
(ncn#) Set NODE_XNAME to the xname of the node.
NODE_XNAME=x3000c0s27b0n0
BMC_XNAME=$(echo "${NODE_XNAME}" | grep -E -o 'x[0-9]+c[0-9]+s[0-9]+b[0-9]+')
(ncn#) After roughly 5-10 minutes, the node’s BMC should be discovered by the HSM, and the node’s BMC can be resolved by using its component name (xname) in DNS.
ping "${BMC_XNAME}"
If adding Foxconn (Paradise) nodes to the system, follow the Replacing Foxconn Usernames and Passwords in Vault procedure if nodes fail to discover.
(ncn#) Verify that discovery has completed.
cray hsm inventory redfishEndpoints describe "${BMC_XNAME}" --format toml
Example output:
ID = "x3000c0s2b0"
Type = "NodeBMC"
Hostname = ""
Domain = ""
FQDN = "x3000c0s27b0"
Enabled = true
UUID = "990150e5-03bc-58b5-b986-cfd418d5778b"
User = "root"
Password = ""
RediscoverOnUpdate = true
[DiscoveryInfo]
LastDiscoveryAttempt = "2021-10-20T21:19:32.332521Z"
RedfishVersion = "1.6.0"
LastDiscoveryStatus = "DiscoverOK"
LastDiscoveryStatus displays as DiscoverOK, the node BMC has been successfully discovered.DiscoveryStarted then the BMC is currently being inventoried by HSM.HTTPsGetFailed or ChildVerificationFailed, then an error has
occurred during the discovery process.(ncn#) Verify that the node BMC has been discovered by the HSM.
cray hsm inventory redfishEndpoints describe "${BMC_XNAME}" --format json
Example output:
{
"ID": "x3000c0s27b0",
"Type": "NodeBMC",
"Hostname": "x3000c0s27b0",
"Domain": "",
"FQDN": "x3000c0s27b0",
"Enabled": true,
"UUID": "e005dd6e-debf-0010-e803-b42e99be1a2d",
"User": "root",
"Password": "",
"MACAddr": "b42e99be1a2d",
"RediscoverOnUpdate": true,
"DiscoveryInfo": {
"LastDiscoveryAttempt": "2021-01-29T16:15:37.643327Z",
"LastDiscoveryStatus": "DiscoverOK",
"RedfishVersion": "1.7.0"
}
}
LastDiscoveryStatus displays as DiscoverOK, the node BMC has been successfully discovered.DiscoveryStarted then the BMC is currently being inventoried by HSM.HTTPsGetFailed or ChildVerificationFailed then an error occurred during the discovery process.(ncn#) Verify that the node are enabled in the HSM.
cray hsm state components describe "${NODE_XNAME}" --format toml
Example output (truncated):
Type = "Node"
Enabled = true
State = "Off"
(ncn#) Enable the nodes in the HSM database.
In this example, the nodes are x3000c0s27b1n0 - x3000c0s27b1n3.
cray hsm state components bulkEnabled update --enabled true \
--component-ids "${NODE_XNAME}"
Repeat for each node present in the blade.
(ncn#) Set CMC_XNAME environment variable with the xname of the CMC.
CMC_XNAME=x3000c0s17b999
(ncn#) After roughly 5-10 minutes, the node’s BMC should be discovered by the HSM, and the node’s BMC can be resolved by using its component name (xname) in DNS.
ping "${CMC_XNAME}"
(ncn#) Verify that discovery has completed.
cray hsm inventory redfishEndpoints describe "${CMC_XNAME}" --format toml
Example output:
ID = "x3000c0s3b0"
Type = "NodeBMC"
Hostname = ""
Domain = ""
FQDN = "x3000c0s3b0"
Enabled = true
UUID = "fe1ce24e-f3cc-42d9-990b-6a23b7279562"
User = "root"
Password = ""
RediscoverOnUpdate = true
[DiscoveryInfo]
LastDiscoveryAttempt = "2022-09-12T15:33:24.317016Z"
LastDiscoveryStatus = "DiscoverOK"
RedfishVersion = "1.7.0"
LastDiscoveryStatus displays as DiscoverOK, the node BMC has been successfully discovered.DiscoveryStarted then the BMC is currently being inventoried by HSM.HTTPsGetFailed or ChildVerificationFailed, then an error has
occurred during the discovery process.Verify that the correct firmware versions are present for node BIOS, BMC, HSN NICs, GPUs, and so on.
(ncn#) If necessary, update the firmware.
cray fas actions create CUSTOM_DEVICE_PARAMETERS.json
Update workload manager configuration to include any newly added compute nodes to the system.
HPE Cray Programming Environment Installation Guide: CSM on HPE Cray EX Systems (S-8003) to regenerate the Slurm
configuration to include any new compute nodes added to the system.(ncn-mw#) Use the Boot Orchestration Service (BOS) to power on and boot the nodes.
Use the appropriate BOS template for the node type.
cray bos v2 sessions create --template-name cle-VERSION \
--operation reboot --limit x3000c0s27b0n0,x3000c0s27b0n1,x3000c0s27b0n2,x3000c0s27b00n3
These troubleshooting steps are applicable when DVS is operating over the NMN network, and not the HSN network.
There should be one or more cray-cps pods.
(ncn-mw#) Verify that the cray-cps pods on worker nodes are Running.
kubectl get pods -Ao wide | grep cps
Example output:
services cray-cps-75cffc4b94-j9qzf 2/2 Running 0 42h 10.40.0.57 ncn-w001
(ncn-w#) SSH to each worker node running CPS/DVS, and run ensure that there are no recurring "DVS: merge_one" error messages as shown.
The error messages indicate that DVS is detecting an IP address change for one of the client nodes.
dmesg -T | grep "DVS: merge_one"
Example output that shows the IP address for x3000c0s19b1n0 has changed its NMN IP address from 10.252.0.26 to 10.252.0.33:
[Tue Jul 21 13:09:54 2020] DVS: merge_one#351: New node map entry does not match the existing entry
[Tue Jul 21 13:09:54 2020] DVS: merge_one#353: nid: 8 -> 8
[Tue Jul 21 13:09:54 2020] DVS: merge_one#355: name: 'x3000c0s19b1n0' -> 'x3000c0s19b1n0'
[Tue Jul 21 13:09:54 2020] DVS: merge_one#357: address: '10.252.0.26@tcp99' -> '10.252.0.33@tcp99'
[Tue Jul 21 13:09:54 2020] DVS: merge_one#358: Ignoring.
(ncn-mw#) If the "DVS: merge_one" error messages is shown, then the IP address of the node needs to be corrected. This will prevent the need to reload DVS.
Set the following environment variables based on the output collected in the previous step.
NODE_XNAME=x3000c0s19b1n0
CURRENT_IP_ADDRESS=10.252.0.33
DESIRED_IP_ADDRESS=10.252.0.26
Determine the HSM EthernetInterface entry holding onto the desired IP address.
cray hsm inventory ethernetInterfaces list --ip-address "${DESIRED_IP_ADDRESS}" --output toml
If no EthernetInterfaces are found, then continue on to the next step.
Example output:
results = []
If an EthernetInterface is found, then it needs to be removed from HSM.
Example output:
[[results]]
ID = "b42e99dfecf0"
Description = "Ethernet Interface Lan2"
MACAddress = "b4:2e:99:df:ec:f0"
LastUpdate = "2022-08-08T10:10:57.527819Z"
ComponentID = "x3000c0s17b2n0"
Type = "Node"
[[results.IPAddresses]]
IPAddress = "10.252.1.26"
Record the returned ID value into the EI_ID environment variable.
OLD_EI_ID=b42e99dfecf0
Delete the EthernetInterfaces from HSM.
cray hsm inventory ethernetInterfaces delete ${OLD_EI_ID}
Determine the HSM EthernetInterface entry holding onto the current IP address.
cray hsm inventory ethernetInterfaces list --component-id "${NODE_XNAME}" --ip-address "${CURRENT_IP_ADDRESS}" --output toml
Example output:
[[results]]
ID = "b42e99dff35f"
Description = "Ethernet Interface Lan1"
MACAddress = "b4:2e:99:df:f3:5f"
LastUpdate = "2022-08-18T16:38:21.13173Z"
ComponentID = "x3000c0s17b1n0"
Type = "Node"
[[results.IPAddresses]]
IPAddress = "10.252.1.69"
Record the returned ID value into the EI_ID environment variable.
CURRENT_EI_ID=b42e99dff35f
Update the EthernetInterface to have the desired IP address:
cray hsm inventory ethernetInterfaces update "$CURRENT_EI_ID" --component-id "${NODE_XNAME}" --ip-addresses--ip-address "${DESIRED_IP_ADDRESS}"
Reboot the node.
(nid#) SSH to the node and check each DVS mount.
mount | grep dvs | head -1
Example output:
/var/lib/cps-local/0dbb42538e05485de6f433a28c19e200 on /var/opt/cray/gpu/nvidia-squashfs-21.3 type dvs (ro,relatime,blksize=524288,statsfile=/sys/kernel/debug/dvs/mounts/1/stats,attrcache_timeout=14400,cache,nodatasync,noclosesync,retry,failover,userenv,noclusterfs,killprocess,noatomic,nodeferopens,no_distribute_create_ops,no_ro_cache,loadbalance,maxnodes=1,nnodes=6,nomagic,hash_on_nid,hash=modulo,nodefile=/sys/kernel/debug/dvs/mounts/1/nodenames,nodename=x3000c0s6b0n0:x3000c0s5b0n0:x3000c0s4b0n0:x3000c0s9b0n0:x3000c0s8b0n0:x3000c0s7b0n0)
(ncn-mw#) Determine the pod name for the Slingshot fabric manager pod and check the status of the fabric.
kubectl exec -it -n services $(kubectl get pods --all-namespaces |grep slingshot | awk '{print $2}') -- fmn_status
(ncn#) Retrieve an authentication token.
TOKEN=$(curl -k -s -S -d grant_type=client_credentials \
-d client_id=admin-client \
-d client_secret=`kubectl get secrets admin-client-auth -o jsonpath='{.data.client-secret}' | base64 -d` \
https://api-gw-service-nmn.local/keycloak/realms/shasta/protocol/openid-connect/token | jq -r '.access_token')
(ncn#) Check for duplicate IP address entries in the Hardware State Management Database (HSM).
Duplicate entries will cause DNS operations to fail.
Verify that each node hostname resolves to one IP address.
nslookup x1005c3s0b0n0
Example output with one IP address resolving:
Server: 10.92.100.225
Address: 10.92.100.225#53
Name: x1005c3s0b0n0
Address: 10.100.0.26
Reload the Kea configuration.
curl -s -k -H "Authorization: Bearer ${TOKEN}" -X POST -H "Content-Type: application/json" -d '{ "command": "config-reload", "service": [ "dhcp4" ] }' https://api-gw-service-nmn.local/apis/dhcp-kea |jq
If there are no duplicate IP addresses within HSM, then the following response is expected:
[
{
"result": 0,
"text": "Configuration successful."
}
]
If there is a duplicate IP address in the HSM, then an error message similar to the message below will be returned.
[{'result': 1, 'text': "Config reload failed: configuration error using file '/usr/local/kea/cray-dhcp-kea-dhcp4.conf':
failed to add new host using the HW address '00:40:a6:83:50:a4 and DUID '(null)' to the IPv4 subnet id '0' for the
address 10.100.0.105: There's already a reservation for this address"}]
(ncn#) Check for active DHCP leases.
If there are no DHCP leases, then there is a configuration error.
curl -H "Authorization: Bearer ${TOKEN}" -X POST -H "Content-Type: application/json" \
-d '{ "command": "lease4-get-all", "service": [ "dhcp4" ] }' https://api-gw-service-nmn.local/apis/dhcp-kea | jq
Example output with no active DHCP leases:
[
{
"arguments": {
"leases": []
},
"result": 3,
"text": "0 IPv4 lease(s) found."
}
]
(ncn#) If there are duplicate entries in the HSM as a result of this procedure (10.100.0.105 in this example), then delete the duplicate entry.
Show the EthernetInterfaces for the duplicate IP address:
cray hsm inventory ethernetInterfaces list --ip-address 10.100.0.105 --format json | jq
Example output for an IP address that is associated with two MAC addresses:
[
{
"ID": "0040a68350a4",
"Description": "Node Maintenance Network",
"MACAddress": "00:40:a6:83:50:a4",
"IPAddress": "10.100.0.105",
"LastUpdate": "2021-08-24T20:24:23.214023Z",
"ComponentID": "x1005c3s0b0n0",
"Type": "Node"
},
{
"ID": "0040a683639a",
"Description": "Node Maintenance Network",
"MACAddress": "00:40:a6:83:63:9a",
"IPAddress": "10.100.0.105",
"LastUpdate": "2021-08-27T19:15:53.697459Z",
"ComponentID": "x1005c3s0b0n0",
"Type": "Node"
}
]
Delete the older entry.
cray hsm inventory ethernetInterfaces delete 0040a68350a4
(ncn#) Check DNS.
nslookup 10.100.0.105
Example output:
105.0.100.10.in-addr.arpa name = nid001032-nmn.
105.0.100.10.in-addr.arpa name = nid001032-nmn.local.
105.0.100.10.in-addr.arpa name = x1005c3s0b0n0.
105.0.100.10.in-addr.arpa name = x1005c3s0b0n0.local.