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kava-10 upgrade instructions (#1227)
* migrate doc for kava 10 * update wording * height & time update * update to 4 hours before failure * correct times & block height * add rollback doc Co-authored-by: karzak <kjydavis3@gmail.com>
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Draco Li
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migrate/v0_17/migrate.md
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# kava-10 Upgrade Instructions
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## Software Version and Key Dates
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- We will be upgrading from chain-id "kava-9" to chain-id "kava_2222-10".
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- The version of Kava for kava-10 is v0.17.0
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- The kava-9 chain will be shutdown with a `SoftwareUpgradeProposal` that activates at block height **1411461**, which is approximately 14:00 UTC on May, 10 2022.
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- kava-10 genesis time is set to May 10, 2022 at 17:00 UTC
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- The version of cosmos-sdk for kava-10 is v0.45.3
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- The version of tendermint for kava-10 v0.34.19
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- The minimum version of golang for kava-10 is **1.17+**.
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### Risks
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As a validator, performing the upgrade procedure on your consensus nodes carries a heightened risk of double-signing and being slashed. The most important piece of this procedure is verifying your software version and genesis file hash before starting your validator and signing.
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The riskiest thing a validator can do is discover that they made a mistake and repeat the upgrade procedure again during the network startup. If you discover a mistake in the process, the best thing to do is wait for the network to start before correcting it. If the network is halted and you have started with a different genesis file than the expected one, seek advice from a Kava developer before resetting your validator.
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### Recovery
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Prior to exporting kava-9 state, validators are encouraged to take a full data snapshot at the export height before proceeding. Snap-shotting depends heavily on infrastructure, but generally this can be done by backing up the .kava directory.
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It is critically important to back-up the .kava/data/priv_validator_state.json file after stopping your kava process. This file is updated every block as your validator participates in consensus rounds. It is a critical file needed to prevent double-signing, in case the upgrade fails and the previous chain needs to be restarted.
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In the event that the upgrade does not succeed, validators and operators must downgrade back to v0.16.x of the Kava software and restore to their latest snapshot before restarting their nodes.
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## Upgrade Procedure
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### Before the upgrade
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Kava Labs has submitted a `SoftwareUpgradeProposal` that specifies block height **1411461** as the final block height for kava-9. This height corresponds to approximately 14:00 UTC on March 10th. Once the proposal passes, the chain will shutdown automatically at the specified height and does not require manual intervention by validators.
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### On the day of the upgrade
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**The kava chain is expected to halt at block height **1411461**, at approximately 14:00 UTC, and restart with new software at 17:00 UTC March 10th. Do not stop your node and begin the upgrade before 14:00 UTC on March 10th, or you may go offline and be unable to recover until after the upgrade!**
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**Make sure the kava process is stopped before proceeding and that you have backed up your validator**. Failure to backup your validator could make it impossible to restart your node if the upgrade fails.
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1. Export State (this **MUST** be done using **v0.16.x**)
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```sh
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# verify version before export:
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kava version --long
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# name: kava
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# server_name: kava
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# version: 0.16.0 (any 0.16 version is fine)
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# commit: 184ef2ad4127517828a4a04cc2c51594b66ac012
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# build_tags: netgo,ledger
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# go: go version go1.17.1 linux/amd64
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# export genesis using v0.16.x
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kvd export --for-zero-height --height 1411461 > export-genesis.json
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```
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**Note:** This can take a while!
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2. Update to kava-10
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```sh
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# in the `kava` folder
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git pull
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git checkout v0.17.0
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make install
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# verify versions
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kava version --long
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# name: kava
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# server_name: kava
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# version: v0.17.0
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# commit: [TBD]
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# build_tags: netgo,ledger
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# go: go version go1.17.1 linux/amd64
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# Migrate genesis state
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kava migrate export-genesis.json > genesis.json
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# Verify output of genesis migration
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kava validate-genesis genesis.json # should say it's valid
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kava assert-invariants genesis.json # should say invariants pass
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jq -S -c -M '' genesis.json | shasum -a 256
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# [PLACEHOLDER]
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# Restart node with migrated genesis state
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cp genesis.json ~/.kava/config/genesis.json
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kava unsafe-reset-all
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# Restart node -
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# ! Be sure to remove --halt-time flag if it is set in systemd/docker
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kava start
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```
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### Coordination
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If the kava-10 chain does not launch by March 10, 2022 at 21:00 UTC, the launch should be considered a failure and validators should refer to the [rollback](./rollback.md) instructions to restart the previous kava-9 chain. In the event of launch failure, coordination will occur in the [Kava discord](https://discord.com/invite/kQzh3Uv).
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migrate/v0_17/rollback.md
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# Kava-10 Rollback Instructions
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In the event that the Kava-10 relaunch is unsuccessful, we will restart the Kava-9 chain using the last known state.
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In order to restore the previous chain, the following data must be recovered by validators:
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- The database that contains the state of the previous chain (in ~/.kava/data by default)
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- The priv_validator_state.json file of the validator (in ~/.kava/data by default)
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If you don't have the database data, the Kava developer team or another validator will share a copy of the database via Amazon s3 or a similar service. You will be able to download a copy of the data and verify it before starting your node.
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If you don't have the backup priv_validator_state.json file, you will not have double sign protection on the first block. If this is the case, it's best to consult in the validator discord before starting your node.
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## Restoring state procedure
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1. Stop your node
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```sh
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kava stop
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```
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2. Copy the contents of your backup data directory back to the $KAVA_HOME/data directory. By default this is ~/.kava/data.
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```sh
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# Assumes backup is stored in "backup" directory
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rm -rf ~/.kava/data
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mv backup/.kava/data ~/.kava/data
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```
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3. Install the previous version of kava
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```sh
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# from kava directory
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git checkout v0.16.1
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make install
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## verify version
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kava version --long
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```
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4. Start kava process
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```sh
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### be sure to remove --halt-time flag if it is set
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sudo systemctl daemon-reload
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sudo systemctl start kava
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```
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