tipocket

TiPocket is a testing toolkit designed to test TiDB, it encapsulates some testing tools which are also suitable for testing other databases.

TiPocket is inspired by jepsen-io/jepsen, a famous library on the distributed system field. TiPocket focuses on stability testing on TiDB, it uses chaos-mesh to inject all-round kinds of nemesis on a TiDB cluster.

Requirements

• TiDB Operator >= v1.1.0-rc.3

• Chaos Mesh >= v0.9.1

Toolkit

• go-sqlsmith: go-sqlsmith is our Go implementation of sqlsmith, it's a fuzz-testing tool which can generate random MySQL-dialect SQL queries.
• go-elle: Our Go port version of jepsen-io/elle, a general transactional consistency checker for black-box databases.

Nemesis

• random_kill, all_kill, minor_kill, major_kill, kill_tikv_1node_5min, kill_pd_leader_5min: As their name implies, these nemeses inject unavailable in a specified period of time.
• short_kill_tikv_1node, short_kill_pd_leader: Kill selected container, used to inject short duration of unavailable fault.
• partition_one: Isolate single nodes
• scaling: Scale up/down TiDB/PD/TiKV nodes randomly
• shuffle-leader-scheduler/shuffle-region-scheduler/random-merge-scheduler: Just as there name implies.
• delay_tikv, delay_pd, errno_tikv, errno_pd, mixed_tikv, mixed_pd: Inject IO-related fault.
• small_skews, subcritical_skews, critical_skews, big_skews, huge_skews: Clock skew, small_skews ~100ms, subcritical_skews ~200ms, critical_skews ~250ms, big_skews ~500ms and huge_skews ~5s.

Debug and Run

If you have a K8s cluster, you can use the below commands to deploy and run the case on a TiDB cluster.

On a K8s cluster

make build
export KUBECONFIG=$(YOUR_KUBECONFIG_PATH)
bin/${testcase} -namespace=${ns} -hub=docker.io -image-version=nightly -purge=true -storage-class=local-storage

On the local environment

Another convenient way we recommend you is using tiup to deploy a cluster on local and use it to debug cases.

• Start a TiDB cluster

tiup playground --kv 3

• Specify that cluster address through -tidb-server -tikv-server and -pd-server

-tidb-server 127.0.0.1:4000 

• If a cluster has many service addresses, you can pass a flag multiple times

-tikv-server 127.0.0.1:20160 -tikv-server 127.0.0.1:20161

Workloads

TiPocket includes some consistency, isolation and other kinds of tests

Consistency

• bank transfers between rows of a shared table
• pbank check bank accounts using a linearizability checker porcupine
• vbank like bank but cover more TiKV features
• ledger yet another bank test
• rawkv-linearizability rawkv linearizability checker
• tpcc use go-tpc testing consistency

Isolation

• append checks for dependency cycles in transactions using Elle
• register checks for write-read dependency cycles over read-write registers using Elle