Cronos POS Chain Mainnet: Running a Full Node
This is detailed documentation for setting up a Full Node on the Cronos POS Chain mainnet. Note that while anyone can set up a full node, only the top 100 validators are considered "active" and eligible to receive rewards. See FAQs for more info.
Step 0: Notes on network upgrades
For the host who would like to build a Run a Full Node with complete blockchain data from scratch, note that there were several breaking network upgrades, requiring upgrading at designated block heights below:
*Note that as of
v3.3.5
and higher, you need to modify your.chain-maind/config/app.toml
and set the following params:index_events = []
iavl-cache-size = 781250
iavl-disable-fastnode = false
(set totrue
to skip IAVL migration, but keep asfalse
when starting from a migrated snapshot. When you are onINF starting ABCI with Tendermint
for a while, migration is going on and you should NOT terminate this. It might take a couple of hours, so plan well ahead for this migration, as it may incur downtime.)
Users can refer to the upgrade guides of
"Canis Major" (
v1.*
tov2.0.1
);"DRACO II" (
v2.*
tov3.3.9
);"V4 upgrade" (
v3.3.9
tov4.2.2
); for the detailed upgrade steps.
Pre-requisites
Supported OS
We officially support macOS, Windows and Linux only. Other platforms may work, but there is no guarantee. We will extend our support to other platforms after we have stabilized our current architecture.
Prepare your machine
For Cronos POS Chain mainnet, you will need a machine with the following minimum requirements to run different types of nodes:
Archive Node (setting pruning = nothing)
RAM: 64GB (Rocksdb)
Disk: 3.4TB
CPU: 4 cores
Default Full Node (setting pruning = default)
RAM: 64GB (Rocksdb) or 16GB (goleveldb)
Disk: 1.2TB (From quick sync)
CPU: 4 cores
Pruned Node (setting pruning = everything)
RAM: 64GB (Rocksdb) or 16GB (goleveldb)
Disk: 40GB (From quick sync)
CPU: 4 cores
Please note that the size of snapshots from Quicksync will keep growing.
Step 1. Get the Cronos POS Chain Mainnet binary
Remarks: The following is the minimal setup to join Cronos POS Chain Mainnet. Furthermore, you may want to run full nodes as sentries (see Tendermint), restrict your validator connections to only connect to your full nodes, use secure storage and key management service for your validator keys etc.
To simplify the following step, we will be using Linux for illustration. Binaries for Mac and Windows are also available. There are two options to install chain-maind
:
As mentioned before, in order to run a full node with complete blockchain data, we would need to begin with the older binary version 1.2.1
:
Option 1 - Install chain-maind
released binaries from GitHub
chain-maind
released binaries from GitHubTo install Cronos POS Chain binaries from Github:
You can verify the installation by checking the version of the chain-maind, the current version is
1.2.1
.
OR
Option 2 - Install chain-maind
by homebrew
chain-maind
by homebrewReminder: - If you plan to play around with different networks (mainnet and testnet), we suggest you follow Option 1 to download the binary directly. - The binary downloaded from homebrew is only for interacting with the mainnet. You cannot use it to interact with testnet.
To install binaries in Homebrew for macOS X or Linux
Homebrew is a free and open-source package management system for macOS X. Install the official Chain-maind formula from the terminal.
First, install the
crypto-org-chain
tap, a repository of our Homebrewchain-maind
package:
Now, install the
chain-maind
version1.2.1
with crypto-org-chain/chain-maindYou can verify the installation by checking the version of the
chain-maind
Step 2. Configure chain-maind
chain-maind
Before kick-starting your node, we will have to configure the node so that it connects to the Cronos POS mainnet
Note:
- Depending on your chain-maind
home setting, the chain-maind
configuration will be initialized to that home directory. To simplify the following steps, we will use the default chain-maind home directory ~/.chain-maind/
for illustration.
- You can also put the chain-maind
to your binary path and run it directly by chain-maind
Step 2-1. Initialize chain-maind
chain-maind
First of all, you can initialize chain-maind by:
This
moniker
will be the displayed ID of your node when connected to the Cronos POS Chain network. When providing the moniker value, make sure you drop the square brackets since they are not needed.
Step 2-2. Configure chain-maind
Download and replace the Cronos POS Chain mainnet
genesis.json
by:Verify sha256sum checksum of the downloaded
genesis.json
. You should seeOK!
if the sha256sum checksum matches.Note: For Mac environment,
sha256sum
was not installed by default. In this case, you may setupsha256sum
with this command:In
~/.chain-maind/config/app.toml
, update minimum gas price to avoid transaction spamming
Reminder:
The list of theseed
is subject to change, you can also find the latest seed to connect here.
Important: When a validator is jailed because of a byzantine fault, their validator public key is added to a list of permanently banned validators and cannot re-join the network as a validator with the same public key, see staking tombstone
Step 3. Run everything
Step 3-1. Run everything
Once the chain-maind
has been configured, we are ready to start the node and sync the blockchain data:
Start
chain-maind
, e.g.:
OR
(Optional for Linux) If you would like to have it running in the background, you can start
chain-maind
withsystemd
service, e.g.:
Example: /etc/systemd/system/chain-maind.service created by script
It should begin fetching blocks from the other peers. Please wait until it is synced to the upgrade height 922,363
before moving onto the next step.
Remarks:
Option 2 - Install chain-maind
by homebrew
To install binaries in Homebrew for macOS X or Linux
You can query the node syncing status by
If the above command returns
false
, it means that your node is synced; otherwise, it returnstrue
and implies your node is still catching up.
Step 3-2. Upgrade the chain-maind
binary to v2.1.2
chain-maind
binary to v2.1.2
At the upgrade height of 922,363
, users will see the following error message on the chain-maind
:
Step 3-2-1 - Get the v2.1.2
binary
v2.1.2
binaryTo simplify the following step, we will be using Linux for illustration. Binary for Mac and Windows are also available.
Terminate the
chain-maind
; afterwards, download thev2.1.2
released binaries from github:
Remarks:
If you have stated chain-maind
with systemd service, kindly stop it by
And replace the binary in the location where the ExecStart
states in Systemd Unit file.
For homebrew users, simply run
Step 3-2-2 - Verify the version
You can verify the installation by checking the version of chain-maind
, the latest version is 2.0.1
.
Step 3-2-3 - Restart chain-maind
with version v2.1.2
chain-maind
with version v2.1.2
We are ready to start the node join the network again with the new binary:
Start
chain-maind
, e.g.:
You've successfully performed the new binary upgrade! Sit back and wait for the syncing process.
You can query the node syncing status by
If the above command returns false
, it means that your node is synced; otherwise, it returns true
and implies your node is still catching up.
You can check the current block height by querying the public full node by:
and you can check your node's progress (in terms of block height) by:
"DRACO II" and "V4" Network upgrades
You've successfully performed the "Canis Major" binary upgrade! Allow sometime for the node to catch up, meanwhile, you can get ready for "DRACO II," the second network upgrade ( from v2.*
to v3.3.2
at block height 3,526,800
) by following this guide, and "V4 Upgrade" (from v3.3.*
to v4.2.2
at block height 10,073,800
) by following this guide at a later stage. You can find the key details for all the upgrades under "Notes on network upgrades"
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