Cosmovisor

This guide will walk you through migrating from using 0gchaind start [flags] to using Cosmovisor to manage your 0gchaind application. Cosmovisor offers the advantage of handling upgrades automatically without manual intervention.

By using Cosmovisor, you benefit from:

• Automatic upgrade handling without manual intervention.

• Reduced downtime during upgrades.

• Simplified node management and maintenance.

1. Stop node

sudo systemctl stop 0gd.service

2. Download cosmovisor script to install

wget https://raw.githubusercontent.com/0glabs/0g-chain/dev/networks/testnet/init-cosmovisor.sh

Check Script content nano init-cosmovisor.sh

#!/bin/bash

if [ -z "$1" ]; then
    echo "Usage: $0 <0G Home>"
    exit 1
fi

go install cosmossdk.io/tools/cosmovisor/cmd/cosmovisor@latest

export DAEMON_NAME=0gchaind
echo "export DAEMON_NAME=0gchaind" >> ~/.profile
export DAEMON_HOME=$1
echo "export DAEMON_HOME=$1" >> ~/.profile
cosmovisor init $(whereis -b 0gchaind | awk '{print $2}')
mkdir $DAEMON_HOME/cosmovisor/backup
echo "export DAEMON_DATA_BACKUP_DIR=$DAEMON_HOME/cosmovisor/backup" >> ~/.profile
echo "export DAEMON_ALLOW_DOWNLOAD_BINARIES=true" >> ~/.profile

3. Run script

Before running this script, make sure Go is loaded in your current shell session. If you haven't loaded Go yet, please run the following command:

source ~/.profile

chmod +x init-cosmovisor.sh

./init-cosmovisor.sh /root/.0gchain

Reload profile

source ~/.profile

4. Edit service file to run with Cosmovisor

nano /etc/systemd/system/0gd.service

[Unit]
Description=Cosmovisor 0G Node
After=network.target

[Service]
User=root
Type=simple
ExecStart=/root/go/bin/cosmovisor run start --log_output_console
Restart=on-failure
LimitNOFILE=65535
Environment="DAEMON_NAME=0gchaind"
Environment="DAEMON_HOME=/root/.0gchain"
Environment="DAEMON_ALLOW_DOWNLOAD_BINARIES=true"
Environment="DAEMON_RESTART_AFTER_UPGRADE=true"
Environment="DAEMON_DATA_BACKUP_DIR=/root/.0gchain/cosmovisor/backup"
Environment="UNSAFE_SKIP_BACKUP=true"

[Install]
WantedBy=multi-user.target

sudo systemctl daemon-reload && \
sudo systemctl enable 0gd && \
sudo systemctl restart 0gd && sudo systemctl status 0gd && \
sudo journalctl -u 0gd -f -o cat

tail -f /root/.0gchain/log/chain.log