Add instructions to import snapshot data into database (#52)
* Add instructions to import snapshot data into database * Add monitoring and update data processing in README * Update instructions to import snapshot
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README.md
170
README.md
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[](https://goreportcard.com/report/github.com/vulcanize/ipld-eth-state-snapshot)
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## Usage
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## Setup
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* Build the binary:
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For state snapshot from LevelDB
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```bash
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./ipld-eth-state-snapshot stateSnapshot --config={path to toml config file}
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make build
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```
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For in-place snapshot in database
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```bash
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./ipld-eth-state-snapshot inPlaceStateSnapshot --config={path to toml config file}
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```
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### Config
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## Configuration
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Config format:
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```toml
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[snapshot]
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mode = "file" # indicates output mode ("postgres" or "file")
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workers = 4 # degree of concurrency, the state trie is subdivided into sectiosn that are traversed and processed concurrently
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mode = "file" # indicates output mode <postgres | file>
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workers = 4 # degree of concurrency, the state trie is subdivided into sections that are traversed and processed concurrently
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blockHeight = -1 # blockheight to perform the snapshot at (-1 indicates to use the latest blockheight found in leveldb)
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recoveryFile = "recovery_file" # specifies a file to output recovery information on error or premature closure
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[leveldb]
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path = "/Users/user/Library/Ethereum/geth/chaindata" # path to geth leveldb
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ancient = "/Users/user/Library/Ethereum/geth/chaindata/ancient" # path to geth ancient database
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# path to geth leveldb
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path = "/Users/user/Library/Ethereum/geth/chaindata" # ANCIENT_DB_PATH
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# path to geth ancient database
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ancient = "/Users/user/Library/Ethereum/geth/chaindata/ancient" # LVL_DB_PATH
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[database]
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name = "vulcanize_public" # postgres database name
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hostname = "localhost" # postgres host
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port = 5432 # postgres port
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user = "postgres" # postgres user
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password = "" # postgres password
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# when operating in 'postgres' output mode
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# db credentials
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name = "vulcanize_public" # DATABASE_NAME
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hostname = "localhost" # DATABASE_HOSTNAME
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port = 5432 # DATABASE_PORT
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user = "postgres" # DATABASE_USER
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password = "" # DATABASE_PASSWORD
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[file]
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outputDir = "output_dir/" # when operating in 'file' output mode, this is the directory the files are written to
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# when operating in 'file' output mode
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# directory the CSV files are written to
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outputDir = "output_dir/" # FILE_OUTPUT_DIR
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[log]
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level = "info" # log level (trace, debug, info, warn, error, fatal, panic) (default: info)
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file = "log_file" # file path for logging
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file = "log_file" # file path for logging, leave unset to log to stdout
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[prom]
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# prometheus metrics
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metrics = true # enable prometheus metrics (default: false)
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http = true # enable prometheus http service (default: false)
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httpAddr = "0.0.0.0" # prometheus http host (default: 127.0.0.1)
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httpPort = 9101 # prometheus http port (default: 8086)
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dbStats = true # enable prometheus db stats (default: false)
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# node info
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[ethereum]
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clientName = "Geth" # $ETH_CLIENT_NAME
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nodeID = "arch1" # $ETH_NODE_ID
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networkID = "1" # $ETH_NETWORK_ID
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chainID = "1" # $ETH_CHAIN_ID
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genesisBlock = "0xd4e56740f876aef8c010b86a40d5f56745a118d0906a34e69aec8c0db1cb8fa3" # $ETH_GENESIS_BLOCK
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# node info
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clientName = "Geth" # ETH_CLIENT_NAME
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nodeID = "arch1" # ETH_NODE_ID
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networkID = "1" # ETH_NETWORK_ID
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chainID = "1" # ETH_CHAIN_ID
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genesisBlock = "0xd4e56740f876aef8c010b86a40d5f56745a118d0906a34e69aec8c0db1cb8fa3" # ETH_GENESIS_BLOCK
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```
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## Usage
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* For state snapshot from LevelDB:
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```bash
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./ipld-eth-state-snapshot stateSnapshot --config={path to toml config file}
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```
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* For in-place snapshot in the database:
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```bash
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./ipld-eth-state-snapshot inPlaceStateSnapshot --config={path to toml config file}
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```
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## Monitoring
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* Enable metrics using config parameters `prom.metrics` and `prom.http`.
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* `ipld-eth-state-snapshot` exposes following prometheus metrics at `/metrics` endpoint:
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* `state_node_count`: Number of state nodes processed.
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* `storage_node_count`: Number of storage nodes processed.
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* `code_node_count`: Number of code nodes processed.
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* DB stats if operating in `postgres` mode.
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## Tests
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* Install [mockgen](https://github.com/golang/mock#installation)
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* `make test`
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* Run unit tests:
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```bash
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# setup db
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docker-compose up -d
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# run tests after db migrations are run
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make dbtest
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# tear down db
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docker-compose down -v --remove-orphans
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```
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## Import output data in file mode into a database
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* When `ipld-eth-state-snapshot stateSnapshot` is run in file mode (`database.type`), the output is in form of CSV files.
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* Assuming the output files are located in host's `./output_dir` directory.
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* Data post-processing:
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* Create a directory to store post-processed output:
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```bash
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mkdir -p output_dir/processed_output
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```
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* Combine output from multiple workers and copy to post-processed output directory:
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```bash
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# public.blocks
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cat {output_dir,output_dir/*}/public.blocks.csv > output_dir/processed_output/combined-public.blocks.csv
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# eth.state_cids
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cat output_dir/*/eth.state_cids.csv > output_dir/processed_output/combined-eth.state_cids.csv
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# eth.storage_cids
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cat output_dir/*/eth.storage_cids.csv > output_dir/processed_output/combined-eth.storage_cids.csv
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# public.nodes
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cp output_dir/public.nodes.csv output_dir/processed_output/public.nodes.csv
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# eth.header_cids
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cp output_dir/eth.header_cids.csv output_dir/processed_output/eth.header_cids.csv
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```
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* De-duplicate data:
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```bash
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# public.blocks
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sort -u output_dir/processed_output/combined-public.blocks.csv -o output_dir/processed_output/deduped-combined-public.blocks.csv
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# eth.header_cids
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sort -u output_dir/processed_output/eth.header_cids.csv -o output_dir/processed_output/deduped-eth.header_cids.csv
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# eth.state_cids
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sort -u output_dir/processed_output/combined-eth.state_cids.csv -o output_dir/processed_output/deduped-combined-eth.state_cids.csv
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# eth.storage_cids
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sort -u output_dir/processed_output/combined-eth.storage_cids.csv -o output_dir/processed_output/deduped-combined-eth.storage_cids.csv
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```
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* Copy over the post-processed output files to the DB server (say in `/output_dir`).
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* Start `psql` to run the import commands:
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```bash
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psql -U <DATABASE_USER> -h <DATABASE_HOSTNAME> -p <DATABASE_PORT> <DATABASE_NAME>
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```
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* Run the following to import data:
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```bash
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# public.nodes
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COPY public.nodes FROM '/output_dir/processed_output/public.nodes.csv' CSV;
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# public.blocks
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COPY public.blocks FROM '/output_dir/processed_output/deduped-combined-public.blocks.csv' CSV;
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# eth.header_cids
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COPY eth.header_cids FROM '/output_dir/processed_output/deduped-eth.header_cids.csv' CSV;
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# eth.state_cids
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COPY eth.state_cids FROM '/output_dir/processed_output/deduped-combined-eth.state_cids.csv' CSV FORCE NOT NULL state_leaf_key;
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# eth.storage_cids
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COPY eth.storage_cids FROM '/output_dir/processed_output/deduped-combined-eth.storage_cids.csv' CSV FORCE NOT NULL storage_leaf_key;
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```
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* NOTE: `COPY` command on CSVs inserts empty strings as `NULL` in the DB. Passing `FORCE_NOT_NULL <COLUMN_NAME>` forces it to insert empty strings instead. This is required to maintain compatibility of the imported snapshot data with the data generated by statediffing. Reference: https://www.postgresql.org/docs/14/sql-copy.html
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