Install Proxy Nodes
Download
You can download the latest version of the kpn on Download page.
Installation
Linux Archive Distribution
The archive file consists of the executable binary and the configuration file structured as follows.
Note: Do NOT alter the file structure or file name. If you change it, the node may not function correctly.
- bin |- kpn |- kpnd- conf |- kpnd.conf
| File Name | File Description |
|---|---|
| bin/kpn | PN executable file |
| bin/kpnd | PN start/termination script file |
| conf/kpnd.conf | PN configuration file |
The installation is the uncompression of the downloaded package where you want to install the package.
$ tar zxf kpn-vX.X.X-linux-amd64.tar.gz
Or,
$ tar zxf kpn-baobab-vX.X.X-linux-amd64.tar.gz
Note: it is recommended that the uncompressed directory kpn-linux-amd64/bin path should be added to the environment variable $PATH to run the kpn and kpnd globally. As an example,
$ export PATH=$PATH:~/downloaded/path/kpn-linux-amd64/bin
The other sections assume that the path is added to the variable.
RPM Distribution (RHEL/CentOS/Fedora)
You can install the downloaded RPM file with the following yum command.
$ yum install kpnd-vX.X.X.el7.x86_64.rpm
Or,
$ yum install kpnd-baobab-vX.X.X.el7.x86_64.rpm
Install from Kaia Yum Repo
Alternatively, you can install kpnd from the Kaia Yum repo, run:
$ sudo curl -o /etc/yum.repos.d/kaia.repo https://packages.kaia.io/config/rhel/7/kaia.repo && sudo yum install kpnd
hoặc
$ sudo curl -o /etc/yum.repos.d/kaia.repo https://packages.kaia.io/config/rhel/9-stream/kaia.repo && sudo yum cài đặt kpnd
Installed Location
The installed files are located as follows.
| File Name | Location |
|---|---|
| kpn | /usr/bin/kpn |
| kpnd.conf | /etc/kpnd/conf/kpnd.conf |
Configuration
The PN configuration is to create a data directory and set up several values in the configuration file kpnd.conf.
- Create a PN Data Directory
- Install node key
- Install
static-node.json - Configure the PN with
kpnd.conf.
PN Data Directory Creation
Considering the fact that the size of Kaia blockchain data is always increased, it is recommended to use a big enough storage. You may need to create the directory on your desired path.
$ mkdir -p /var/kpnd/data
Install Node Key
In order to operate a PN, a nodekey is required. The KPN binary will create a new one for you if you do not have it. If you have one, you need to put your nodekey into the PN data directory. The way to create a nodekey is in the "Before You Install" section. The following command line copies the nodekey into the PN data directory.
$ cp nodekey /var/kpnd/data
Install static-nodes.json
The static-nodes.json should be created from the PN operator. It contains the addresses that your PN is connected to. It is recommended to add the addresses including your CN and a PN from another Core Cell. Please contact to the Kaia official email for more details (bootstrap@klaytn.com for Mainnet or baobab@klaytn.com for Kairos).
static-nodes.json
[ "kni://4f2f47f3bf35a2c576d3345e6e9c49b147d510c05832d2458709f63c3c90c76ead205975d944ed65e77dd4c6f63ebe1ef21d60da95952bc1e200e7487f4d9e1b@10.11.2.101:32323?discport=0&ntype=cn", "kni://8dee912aeda2ccfaa4fe421f015d4d75c2e3fd4aab75fa399b42767caad33531e57f3356b4a4af374593e33ec4320e1325aa2390a7be2489fa6b5724894680eb@10.11.2.102:32323?discport=0&ntype=pn"]
The node URI of the PN is in the "Before You Install" section. (Note: This IP address is different from CN public IP.) The following command line copies the static-nodes.json file into the PN data directory.
$ cp static-nodes.json /var/kpnd/data
Update the Configuration File
Configuration File Location:
- For the archive distribution, the config directory location defaults to
$INSTALL_PATH/kpn-linux-amd64/conf/. - For the package distribution, the config directory defaults to
/etc/kpnd/conf/.
Add Data Directory
Bạn nên cập nhật biến môi trường thư mục dữ liệu $DATA_DIR trong tệp cấu hình kpnd.conf.
...DATA_DIR=/var/kpnd/data...
(Optional) Download Chaindata Snapshot
Synching from the genesis block is time-consuming. You may use Chaindata Snapshot to skip the Full Sync process.
Startup the PN
PN Start/Stop
You can start/stop the Kaia service with the following systemctl command.
Note: This requires root privileges.
start
$ systemctl start kpnd.service
stop
$ systemctl stop kpnd.service
status
$ systemctl status kpnd.service
Troubleshooting
If you meet the following error,
Failed to start kpnd.service: Unit not found.
reload the systemd manager configuration with the following command.
$ systemctl daemon-reload
Testing the Core Cell
It is time to check that Core Cell is successfully installed and it is working as expected after installation.
Process Status
It is possible to check the status of PN's process using the status commands systemctl and kpnd.
systemctl
systemctl is installed along with the RPM and the status of PN can be checked as follows.
$ systemctl status kpnd.service● kpnd.service - (null) Loaded: loaded (/etc/rc.d/init.d/kpnd; bad; vendor preset: disabled) Active: active (running) since Wed 2019-01-09 11:42:39 UTC; 1 months 4 days ago Docs: man:systemd-sysv-generator(8) Process: 29636 ExecStart=/etc/rc.d/init.d/kpnd start (code=exited, status=0/SUCCESS) Main PID: 29641 (kpn) CGroup: /system.slice/kpnd.service └─29641 /usr/local/bin/kpn --networkid 1000 --datadir /kpnd_home --port 32323 --srvtype fasthttp --metrics --prometheus --verbosity 3 --txpool.global...Jan 09 11:42:39 ip-10-11-2-101.ap-northeast-2.compute.internal systemd[1]: Starting (null)...Jan 09 11:42:39 ip-10-11-2-101.ap-northeast-2.compute.internal kpnd[29636]: Starting kpnd: [ OK ]Jan 09 11:42:39 ip-10-11-2-101.ap-northeast-2.compute.internal systemd[1]: Started (null).
You can check the current status such as Active: active (running) in the above example.
kpnd
kpnd is installed along with the package and the status of PN can be checked as follows.
$ kpnd statuskpnd is running
Logs
The log is stored in kpnd.out file located in the path defined in the LOG_DIR field of the kpnd.conf file. When the node works properly, you can see that each block is created per second as follows.
Example:
$ tail kpnd.outINFO[02/13,07:02:24 Z] [35] Commit new mining work number=11572924 txs=0 elapsed=488.336µsINFO[02/13,07:02:25 Z] [5] Imported new chain segment blocks=1 txs=0 mgas=0.000 elapsed=1.800ms mgasps=0.000 number=11572924 hash=f46d09…ffb2dc cache=1.59mBINFO[02/13,07:02:25 Z] [35] Commit new mining work number=11572925 txs=0 elapsed=460.485µsINFO[02/13,07:02:25 Z] [35] 🔗 block reached canonical chain number=11572919 hash=01e889…524f02INFO[02/13,07:02:26 Z] [14] Committed address=0x1d4E05BB72677cB8fa576149c945b57d13F855e4 hash=1fabd3…af66fe number=11572925INFO[02/13,07:02:26 Z] [5] Imported new chain segment blocks=1 txs=0 mgas=0.000 elapsed=1.777ms mgasps=0.000 number=11572925 hash=1fabd3…af66fe cache=1.59mBINFO[02/13,07:02:26 Z] [35] Commit new mining work number=11572926 txs=0 elapsed=458.665µsINFO[02/13,07:02:27 Z] [14] Committed address=0x1d4E05BB72677cB8fa576149c945b57d13F855e4 hash=60b9aa…94f648 number=11572926INFO[02/13,07:02:27 Z] [5] Imported new chain segment blocks=1 txs=0 mgas=0.000 elapsed=1.783ms mgasps=0.000 number=11572926 hash=60b9aa…94f648 cache=1.59mBINFO[02/13,07:02:27 Z] [35] Commit new mining work number=11572927 txs=0 elapsed=483.436µs
kpn console
Kaia provides a CLI client: kpn console. However, a PN may disable the RPC interface for the client due to the security reason. Another way of using the client is to connect to the process via IPC (inter-process communication).
The IPC file klay.ipc is located in the DATA_DIR path on a PN.
Please execute the following command and check out the result.
$ kpn attach --datadir /var/kpnd/data Welcome to the Kaia JavaScript console! instance: Kaia/vX.X.X/XXXX-XXXX/goX.X.X coinbase: 0x67f68fdd9740fd7a1ac366294f05a3fd8df0ed40 at block: 11573551 (Wed, 13 Feb 2019 07:12:52 UTC) datadir: /var/kpnd/data modules: admin:1.0 debug:1.0 istanbul:1.0 klay:1.0 miner:1.0 net:1.0 personal:1.0 rpc:1.0 txpool:1.0 >
You can check the usable commands on API Document
The useful APIs to check the status of a PN:
kaia.blockNumber(to get the latest block number)net.peerCount(to get the number of the connected Kaia nodes currently)
kaia.blockNumber
You can get the latest block number to see if blocks are created (for CNs) or propagated (for CNs and PNs) properly based on your node type.
> kaia.blockNumber11573819
net.peerCount
> net.peerCount14
The above command line returns a different value based on the node type.
- CN: the number of connected CNs + the number of connected PNs.
- PN: the number of connected CNs + the number of connected PNs + the number of connected ENs.