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vtctl.go
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/*
Copyright 2019 The Vitess Authors.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
// Package vtctl contains the implementation of all the Vitess management
// commands.
package vtctl
// The following comment section contains definitions for command arguments.
/*
COMMAND ARGUMENT DEFINITIONS
- cell, cell name: A cell is a location for a service. Generally, a cell
resides in only one cluster. In Vitess, the terms "cell" and
"data center" are interchangeable. The argument value is a
string that does not contain whitespace.
- tablet alias: A Tablet Alias uniquely identifies a vttablet. The argument
value is in the format
<code><cell name>-<uid></code>.
- keyspace, keyspace name: The name of a sharded database that contains one
or more tables. Vitess distributes keyspace shards into multiple
machines and provides an SQL interface to query the data. The
argument value must be a string that does not contain whitespace.
- port name: A port number. The argument value should be an integer between
<code>0</code> and <code>65535</code>, inclusive.
- shard, shard name: The name of a shard. The argument value is typically in
the format <code><range start>-<range end></code>.
- keyspace/shard: The name of a sharded database that contains one or more
tables as well as the shard associated with the command.
The keyspace must be identified by a string that does not
contain whitepace, while the shard is typically identified
by a string in the format
<code><range start>-<range end></code>.
- duration: The amount of time that the action queue should be blocked.
The value is a string that contains a possibly signed sequence
of decimal numbers, each with optional fraction and a unit
suffix, such as "300ms" or "1h45m". See the definition of the
Go language's <a
href="https://golang.org/pkg/time/#ParseDuration">ParseDuration</a>
function for more details. Note that, in practice, the value
should be a positively signed value.
- db type, tablet type: The vttablet's role. Valid values are:
-- backup: A replica copy of data that is offline to queries other than
for backup purposes
-- batch: A replicated copy of data for OLAP load patterns (typically for
MapReduce jobs)
-- drained: A tablet that is reserved for a background process. For example,
a tablet used by a vtworker process, where the tablet is likely
lagging in replication.
-- experimental: A replica copy of data that is ready but not serving query
traffic. The value indicates a special characteristic of
the tablet that indicates the tablet should not be
considered a potential master. Vitess also does not
worry about lag for experimental tablets when reparenting.
-- master: A primary copy of data
-- rdonly: A replica copy of data for OLAP load patterns
-- replica: A replica copy of data ready to be promoted to master
-- restore: A tablet that is restoring from a snapshot. Typically, this
happens at tablet startup, then it goes to its right state.
-- spare: A replica copy of data that is ready but not serving query traffic.
The data could be a potential master tablet.
*/
import (
"bytes"
"encoding/json"
"errors"
"flag"
"fmt"
"io/ioutil"
"math"
"sort"
"strconv"
"strings"
"sync"
"time"
"context"
"github.com/golang/protobuf/jsonpb"
"github.com/golang/protobuf/proto"
"vitess.io/vitess/go/flagutil"
"vitess.io/vitess/go/json2"
"vitess.io/vitess/go/mysql"
"vitess.io/vitess/go/sqltypes"
"vitess.io/vitess/go/sync2"
hk "vitess.io/vitess/go/vt/hook"
"vitess.io/vitess/go/vt/key"
"vitess.io/vitess/go/vt/log"
"vitess.io/vitess/go/vt/logutil"
"vitess.io/vitess/go/vt/schema"
"vitess.io/vitess/go/vt/schemamanager"
"vitess.io/vitess/go/vt/sqlparser"
"vitess.io/vitess/go/vt/topo"
"vitess.io/vitess/go/vt/topo/topoproto"
"vitess.io/vitess/go/vt/topotools"
"vitess.io/vitess/go/vt/vterrors"
"vitess.io/vitess/go/vt/wrangler"
replicationdatapb "vitess.io/vitess/go/vt/proto/replicationdata"
tabletmanagerdatapb "vitess.io/vitess/go/vt/proto/tabletmanagerdata"
topodatapb "vitess.io/vitess/go/vt/proto/topodata"
vschemapb "vitess.io/vitess/go/vt/proto/vschema"
vtctldatapb "vitess.io/vitess/go/vt/proto/vtctldata"
vtrpcpb "vitess.io/vitess/go/vt/proto/vtrpc"
"vitess.io/vitess/go/vt/proto/vttime"
)
var (
// ErrUnknownCommand is returned for an unknown command
ErrUnknownCommand = errors.New("unknown command")
)
// Flags are exported for use in go/vt/vtctld.
var (
HealthCheckTopologyRefresh = flag.Duration("vtctl_healthcheck_topology_refresh", 30*time.Second, "refresh interval for re-reading the topology")
HealthcheckRetryDelay = flag.Duration("vtctl_healthcheck_retry_delay", 5*time.Second, "delay before retrying a failed healthcheck")
HealthCheckTimeout = flag.Duration("vtctl_healthcheck_timeout", time.Minute, "the health check timeout period")
)
type command struct {
name string
method func(ctx context.Context, wr *wrangler.Wrangler, subFlags *flag.FlagSet, args []string) error
params string
help string // if help is empty, won't list the command
}
type commandGroup struct {
name string
commands []command
}
// commandsMutex protects commands at init time. We use servenv, which calls
// all Run hooks in parallel.
var commandsMutex sync.Mutex
// TODO: Convert these commands to be automatically generated from flag parser.
var commands = []commandGroup{
{
"Tablets", []command{
{"InitTablet", commandInitTablet,
"DEPRECATED [-allow_update] [-allow_different_shard] [-allow_master_override] [-parent] [-db_name_override=<db name>] [-hostname=<hostname>] [-mysql_port=<port>] [-port=<port>] [-grpc_port=<port>] [-tags=tag1:value1,tag2:value2] -keyspace=<keyspace> -shard=<shard> <tablet alias> <tablet type>",
"Initializes a tablet in the topology.\n"},
{"GetTablet", commandGetTablet,
"<tablet alias>",
"Outputs a JSON structure that contains information about the Tablet."},
{"DEPRECATED UpdateTabletAddrs", commandUpdateTabletAddrs,
"[-hostname <hostname>] [-ip-addr <ip addr>] [-mysql-port <mysql port>] [-vt-port <vt port>] [-grpc-port <grpc port>] <tablet alias> ",
"Updates the IP address and port numbers of a tablet."},
{"DeleteTablet", commandDeleteTablet,
"[-allow_master] <tablet alias> ...",
"Deletes tablet(s) from the topology."},
{"SetReadOnly", commandSetReadOnly,
"<tablet alias>",
"Sets the tablet as read-only."},
{"SetReadWrite", commandSetReadWrite,
"<tablet alias>",
"Sets the tablet as read-write."},
{"StartReplication", commandStartReplication,
"<table alias>",
"Starts replication on the specified tablet."},
{"StopReplication", commandStopReplication,
"<tablet alias>",
"Stops replication on the specified tablet."},
{"ChangeTabletType", commandChangeTabletType,
"[-dry-run] <tablet alias> <tablet type>",
"Changes the db type for the specified tablet, if possible. This command is used primarily to arrange replicas, and it will not convert a master.\n" +
"NOTE: This command automatically updates the serving graph.\n"},
{"Ping", commandPing,
"<tablet alias>",
"Checks that the specified tablet is awake and responding to RPCs. This command can be blocked by other in-flight operations."},
{"RefreshState", commandRefreshState,
"<tablet alias>",
"Reloads the tablet record on the specified tablet."},
{"RefreshStateByShard", commandRefreshStateByShard,
"[-cells=c1,c2,...] <keyspace/shard>",
"Runs 'RefreshState' on all tablets in the given shard."},
{"RunHealthCheck", commandRunHealthCheck,
"<tablet alias>",
"Runs a health check on a remote tablet."},
{"IgnoreHealthError", commandIgnoreHealthError,
"<tablet alias> <ignore regexp>",
"Sets the regexp for health check errors to ignore on the specified tablet. The pattern has implicit ^$ anchors. Set to empty string or restart vttablet to stop ignoring anything."},
{"Sleep", commandSleep,
"<tablet alias> <duration>",
"Blocks the action queue on the specified tablet for the specified amount of time. This is typically used for testing."},
{"ExecuteHook", commandExecuteHook,
"<tablet alias> <hook name> [<param1=value1> <param2=value2> ...]",
"Runs the specified hook on the given tablet. A hook is a script that resides in the $VTROOT/vthook directory. You can put any script into that directory and use this command to run that script.\n" +
"For this command, the param=value arguments are parameters that the command passes to the specified hook."},
{"ExecuteFetchAsApp", commandExecuteFetchAsApp,
"[-max_rows=10000] [-json] [-use_pool] <tablet alias> <sql command>",
"Runs the given SQL command as a App on the remote tablet."},
{"ExecuteFetchAsDba", commandExecuteFetchAsDba,
"[-max_rows=10000] [-disable_binlogs] [-json] <tablet alias> <sql command>",
"Runs the given SQL command as a DBA on the remote tablet."},
{"VReplicationExec", commandVReplicationExec,
"[-json] <tablet alias> <sql command>",
"Runs the given VReplication command on the remote tablet."},
},
},
{
"Shards", []command{
{"CreateShard", commandCreateShard,
"[-force] [-parent] <keyspace/shard>",
"Creates the specified shard."},
{"GetShard", commandGetShard,
"<keyspace/shard>",
"Outputs a JSON structure that contains information about the Shard."},
{"ValidateShard", commandValidateShard,
"[-ping-tablets] <keyspace/shard>",
"Validates that all nodes that are reachable from this shard are consistent."},
{"ShardReplicationPositions", commandShardReplicationPositions,
"<keyspace/shard>",
"Shows the replication status of each replica machine in the shard graph. In this case, the status refers to the replication lag between the master vttablet and the replica vttablet. In Vitess, data is always written to the master vttablet first and then replicated to all replica vttablets. Output is sorted by tablet type, then replication position. Use ctrl-C to interrupt command and see partial result if needed."},
{"ListShardTablets", commandListShardTablets,
"<keyspace/shard>",
"Lists all tablets in the specified shard."},
{"SetShardIsMasterServing", commandSetShardIsMasterServing,
"<keyspace/shard> <is_master_serving>",
"Add or remove a shard from serving. This is meant as an emergency function. It does not rebuild any serving graph i.e. does not run 'RebuildKeyspaceGraph'."},
{"SetShardTabletControl", commandSetShardTabletControl,
"[--cells=c1,c2,...] [--blacklisted_tables=t1,t2,...] [--remove] [--disable_query_service] <keyspace/shard> <tablet type>",
"Sets the TabletControl record for a shard and type. Only use this for an emergency fix or after a finished vertical split. The *MigrateServedFrom* and *MigrateServedType* commands set this field appropriately already. Always specify the blacklisted_tables flag for vertical splits, but never for horizontal splits.\n" +
"To set the DisableQueryServiceFlag, keep 'blacklisted_tables' empty, and set 'disable_query_service' to true or false. Useful to fix horizontal splits gone wrong.\n" +
"To change the blacklisted tables list, specify the 'blacklisted_tables' parameter with the new list. Useful to fix tables that are being blocked after a vertical split.\n" +
"To just remove the ShardTabletControl entirely, use the 'remove' flag, useful after a vertical split is finished to remove serving restrictions."},
{"UpdateSrvKeyspacePartition", commandUpdateSrvKeyspacePartition,
"[--cells=c1,c2,...] [--remove] <keyspace/shard> <tablet type>",
"Updates KeyspaceGraph partition for a shard and type. Only use this for an emergency fix during an horizontal shard split. The *MigrateServedType* commands set this field appropriately already. Specify the remove flag, if you want the shard to be removed from the desired partition."},
{"SourceShardDelete", commandSourceShardDelete,
"<keyspace/shard> <uid>",
"Deletes the SourceShard record with the provided index. This is meant as an emergency cleanup function. It does not call RefreshState for the shard master."},
{"SourceShardAdd", commandSourceShardAdd,
"[--key_range=<keyrange>] [--tables=<table1,table2,...>] <keyspace/shard> <uid> <source keyspace/shard>",
"Adds the SourceShard record with the provided index. This is meant as an emergency function. It does not call RefreshState for the shard master."},
{"ShardReplicationAdd", commandShardReplicationAdd,
"<keyspace/shard> <tablet alias> <parent tablet alias>",
"HIDDEN Adds an entry to the replication graph in the given cell."},
{"ShardReplicationRemove", commandShardReplicationRemove,
"<keyspace/shard> <tablet alias>",
"HIDDEN Removes an entry from the replication graph in the given cell."},
{"ShardReplicationFix", commandShardReplicationFix,
"<cell> <keyspace/shard>",
"Walks through a ShardReplication object and fixes the first error that it encounters."},
{"WaitForFilteredReplication", commandWaitForFilteredReplication,
"[-max_delay <max_delay, default 30s>] <keyspace/shard>",
"Blocks until the specified shard has caught up with the filtered replication of its source shard."},
{"RemoveShardCell", commandRemoveShardCell,
"[-force] [-recursive] <keyspace/shard> <cell>",
"Removes the cell from the shard's Cells list."},
{"DeleteShard", commandDeleteShard,
"[-recursive] [-even_if_serving] <keyspace/shard> ...",
"Deletes the specified shard(s). In recursive mode, it also deletes all tablets belonging to the shard. Otherwise, there must be no tablets left in the shard."},
},
},
{
"Keyspaces", []command{
{"CreateKeyspace", commandCreateKeyspace,
"[-sharding_column_name=name] [-sharding_column_type=type] [-served_from=tablettype1:ks1,tablettype2:ks2,...] [-force] [-keyspace_type=type] [-base_keyspace=base_keyspace] [-snapshot_time=time] <keyspace name>",
"Creates the specified keyspace. keyspace_type can be NORMAL or SNAPSHOT. For a SNAPSHOT keyspace you must specify the name of a base_keyspace, and a snapshot_time in UTC, in RFC3339 time format, e.g. 2006-01-02T15:04:05+00:00"},
{"DeleteKeyspace", commandDeleteKeyspace,
"[-recursive] <keyspace>",
"Deletes the specified keyspace. In recursive mode, it also recursively deletes all shards in the keyspace. Otherwise, there must be no shards left in the keyspace."},
{"RemoveKeyspaceCell", commandRemoveKeyspaceCell,
"[-force] [-recursive] <keyspace> <cell>",
"Removes the cell from the Cells list for all shards in the keyspace, and the SrvKeyspace for that keyspace in that cell."},
{"GetKeyspace", commandGetKeyspace,
"<keyspace>",
"Outputs a JSON structure that contains information about the Keyspace."},
{"GetKeyspaces", commandGetKeyspaces,
"",
"Outputs a sorted list of all keyspaces."},
{"SetKeyspaceShardingInfo", commandSetKeyspaceShardingInfo,
"[-force] <keyspace name> [<column name>] [<column type>]",
"Updates the sharding information for a keyspace."},
{"SetKeyspaceServedFrom", commandSetKeyspaceServedFrom,
"[-source=<source keyspace name>] [-remove] [-cells=c1,c2,...] <keyspace name> <tablet type>",
"Changes the ServedFromMap manually. This command is intended for emergency fixes. This field is automatically set when you call the *MigrateServedFrom* command. This command does not rebuild the serving graph."},
{"RebuildKeyspaceGraph", commandRebuildKeyspaceGraph,
"[-cells=c1,c2,...] [-allow_partial] <keyspace> ...",
"Rebuilds the serving data for the keyspace. This command may trigger an update to all connected clients."},
{"ValidateKeyspace", commandValidateKeyspace,
"[-ping-tablets] <keyspace name>",
"Validates that all nodes reachable from the specified keyspace are consistent."},
{"Reshard", commandReshard,
"[-cells=<cells>] [-tablet_types=<source_tablet_types>] [-skip_schema_copy] <keyspace.workflow> <source_shards> <target_shards>",
"Start a Resharding process. Example: Reshard -cells='zone1,alias1' -tablet_types='master,replica,rdonly' ks.workflow001 '0' '-80,80-'"},
{"MoveTables", commandMoveTables,
"[-cells=<cells>] [-tablet_types=<source_tablet_types>] -workflow=<workflow> <source_keyspace> <target_keyspace> <table_specs>",
`Move table(s) to another keyspace, table_specs is a list of tables or the tables section of the vschema for the target keyspace. Example: '{"t1":{"column_vindexes": [{"column": "id1", "name": "hash"}]}, "t2":{"column_vindexes": [{"column": "id2", "name": "hash"}]}}'. In the case of an unsharded target keyspace the vschema for each table may be empty. Example: '{"t1":{}, "t2":{}}'.`},
{"DropSources", commandDropSources,
"[-dry_run] [-rename_tables] <keyspace.workflow>",
"After a MoveTables or Resharding workflow cleanup unused artifacts like source tables, source shards and blacklists"},
{"CreateLookupVindex", commandCreateLookupVindex,
"[-cell=<cell>] [-tablet_types=<source_tablet_types>] <keyspace> <json_spec>",
`Create and backfill a lookup vindex. the json_spec must contain the vindex and colvindex specs for the new lookup.`},
{"ExternalizeVindex", commandExternalizeVindex,
"<keyspace>.<vindex>",
`Externalize a backfilled vindex.`},
{"Materialize", commandMaterialize,
`<json_spec>, example : '{"workflow": "aaa", "source_keyspace": "source", "target_keyspace": "target", "table_settings": [{"target_table": "customer", "source_expression": "select * from customer", "create_ddl": "copy"}]}'`,
"Performs materialization based on the json spec. Is used directly to form VReplication rules, with an optional step to copy table structure/DDL."},
{"SplitClone", commandSplitClone,
"<keyspace> <from_shards> <to_shards>",
"Start the SplitClone process to perform horizontal resharding. Example: SplitClone ks '0' '-80,80-'"},
{"VerticalSplitClone", commandVerticalSplitClone,
"<from_keyspace> <to_keyspace> <tables>",
"Start the VerticalSplitClone process to perform vertical resharding. Example: SplitClone from_ks to_ks 'a,/b.*/'"},
{"VDiff", commandVDiff,
"[-source_cell=<cell>] [-target_cell=<cell>] [-tablet_types=replica] [-filtered_replication_wait_time=30s] <keyspace.workflow>",
"Perform a diff of all tables in the workflow"},
{"MigrateServedTypes", commandMigrateServedTypes,
"[-cells=c1,c2,...] [-reverse] [-skip-refresh-state] [-filtered_replication_wait_time=30s] [-reverse_replication=false] <keyspace/shard> <served tablet type>",
"Migrates a serving type from the source shard to the shards that it replicates to. This command also rebuilds the serving graph. The <keyspace/shard> argument can specify any of the shards involved in the migration."},
{"MigrateServedFrom", commandMigrateServedFrom,
"[-cells=c1,c2,...] [-reverse] [-filtered_replication_wait_time=30s] <destination keyspace/shard> <served tablet type>",
"Makes the <destination keyspace/shard> serve the given type. This command also rebuilds the serving graph."},
{"SwitchReads", commandSwitchReads,
"[-cells=c1,c2,...] [-reverse] -tablet_type={replica|rdonly} [-dry-run] <keyspace.workflow>",
"Switch read traffic for the specified workflow."},
{"SwitchWrites", commandSwitchWrites,
"[-timeout=30s] [-reverse] [-reverse_replication=true] [-dry-run] <keyspace.workflow>",
"Switch write traffic for the specified workflow."},
{"CancelResharding", commandCancelResharding,
"<keyspace/shard>",
"Permanently cancels a resharding in progress. All resharding related metadata will be deleted."},
{"ShowResharding", commandShowResharding,
"<keyspace/shard>",
"Displays all metadata about a resharding in progress."},
{"FindAllShardsInKeyspace", commandFindAllShardsInKeyspace,
"<keyspace>",
"Displays all of the shards in the specified keyspace."},
{"WaitForDrain", commandWaitForDrain,
"[-timeout <duration>] [-retry_delay <duration>] [-initial_wait <duration>] <keyspace/shard> <served tablet type>",
"Blocks until no new queries were observed on all tablets with the given tablet type in the specified keyspace. " +
" This can be used as sanity check to ensure that the tablets were drained after running vtctl MigrateServedTypes " +
" and vtgate is no longer using them. If -timeout is set, it fails when the timeout is reached."},
},
},
{
"Generic", []command{
{"Validate", commandValidate,
"[-ping-tablets]",
"Validates that all nodes reachable from the global replication graph and that all tablets in all discoverable cells are consistent."},
{"ListAllTablets", commandListAllTablets,
"<cell name1>, <cell name2>, ...",
"Lists all tablets in an awk-friendly way."},
{"ListTablets", commandListTablets,
"<tablet alias> ...",
"Lists specified tablets in an awk-friendly way."},
{"GenerateShardRanges", commandGenerateShardRanges,
"<num shards>",
"Generates shard ranges assuming a keyspace with N shards."},
{"Panic", commandPanic,
"",
"HIDDEN Triggers a panic on the server side, to test the handling."},
},
},
{
"Schema, Version, Permissions", []command{
{"GetSchema", commandGetSchema,
"[-tables=<table1>,<table2>,...] [-exclude_tables=<table1>,<table2>,...] [-include-views] <tablet alias>",
"Displays the full schema for a tablet, or just the schema for the specified tables in that tablet."},
{"ReloadSchema", commandReloadSchema,
"<tablet alias>",
"Reloads the schema on a remote tablet."},
{"ReloadSchemaShard", commandReloadSchemaShard,
"[-concurrency=10] [-include_master=false] <keyspace/shard>",
"Reloads the schema on all the tablets in a shard."},
{"ReloadSchemaKeyspace", commandReloadSchemaKeyspace,
"[-concurrency=10] [-include_master=false] <keyspace>",
"Reloads the schema on all the tablets in a keyspace."},
{"ValidateSchemaShard", commandValidateSchemaShard,
"[-exclude_tables=''] [-include-views] <keyspace/shard>",
"Validates that the master schema matches all of the replicas."},
{"ValidateSchemaKeyspace", commandValidateSchemaKeyspace,
"[-exclude_tables=''] [-include-views] [-skip-no-master] <keyspace name>",
"Validates that the master schema from shard 0 matches the schema on all of the other tablets in the keyspace."},
{"ApplySchema", commandApplySchema,
"[-allow_long_unavailability] [-wait_replicas_timeout=10s] [-ddl_strategy=<ddl_strategy>] {-sql=<sql> || -sql-file=<filename>} <keyspace>",
"Applies the schema change to the specified keyspace on every master, running in parallel on all shards. The changes are then propagated to replicas via replication. If -allow_long_unavailability is set, schema changes affecting a large number of rows (and possibly incurring a longer period of unavailability) will not be rejected. ddl_strategy is used to intruct migrations via gh-ost or pt-osc with optional parameters"},
{"CopySchemaShard", commandCopySchemaShard,
"[-tables=<table1>,<table2>,...] [-exclude_tables=<table1>,<table2>,...] [-include-views] [-skip-verify] [-wait_replicas_timeout=10s] {<source keyspace/shard> || <source tablet alias>} <destination keyspace/shard>",
"Copies the schema from a source shard's master (or a specific tablet) to a destination shard. The schema is applied directly on the master of the destination shard, and it is propagated to the replicas through binlogs."},
{"OnlineDDL", commandOnlineDDL,
"<keyspace> <command> [<migration_uuid>]",
"Operates on online DDL (migrations). Examples:" +
" \nvtctl OnlineDDL test_keyspace show 82fa54ac_e83e_11ea_96b7_f875a4d24e90" +
" \nvtctl OnlineDDL test_keyspace show all" +
" \nvtctl OnlineDDL test_keyspace show running" +
" \nvtctl OnlineDDL test_keyspace show complete" +
" \nvtctl OnlineDDL test_keyspace show failed" +
" \nvtctl OnlineDDL test_keyspace retry 82fa54ac_e83e_11ea_96b7_f875a4d24e90" +
" \nvtctl OnlineDDL test_keyspace cancel 82fa54ac_e83e_11ea_96b7_f875a4d24e90",
},
{"ValidateVersionShard", commandValidateVersionShard,
"<keyspace/shard>",
"Validates that the master version matches all of the replicas."},
{"ValidateVersionKeyspace", commandValidateVersionKeyspace,
"<keyspace name>",
"Validates that the master version from shard 0 matches all of the other tablets in the keyspace."},
{"GetPermissions", commandGetPermissions,
"<tablet alias>",
"Displays the permissions for a tablet."},
{"ValidatePermissionsShard", commandValidatePermissionsShard,
"<keyspace/shard>",
"Validates that the master permissions match all the replicas."},
{"ValidatePermissionsKeyspace", commandValidatePermissionsKeyspace,
"<keyspace name>",
"Validates that the master permissions from shard 0 match those of all of the other tablets in the keyspace."},
{"GetVSchema", commandGetVSchema,
"<keyspace>",
"Displays the VTGate routing schema."},
{"ApplyVSchema", commandApplyVSchema,
"{-vschema=<vschema> || -vschema_file=<vschema file> || -sql=<sql> || -sql_file=<sql file>} [-cells=c1,c2,...] [-skip_rebuild] [-dry-run] <keyspace>",
"Applies the VTGate routing schema to the provided keyspace. Shows the result after application."},
{"GetRoutingRules", commandGetRoutingRules,
"",
"Displays the VSchema routing rules."},
{"ApplyRoutingRules", commandApplyRoutingRules,
"{-rules=<rules> || -rules_file=<rules_file>} [-cells=c1,c2,...] [-skip_rebuild] [-dry-run]",
"Applies the VSchema routing rules."},
{"RebuildVSchemaGraph", commandRebuildVSchemaGraph,
"[-cells=c1,c2,...]",
"Rebuilds the cell-specific SrvVSchema from the global VSchema objects in the provided cells (or all cells if none provided)."},
},
},
{
"Serving Graph", []command{
{"GetSrvKeyspaceNames", commandGetSrvKeyspaceNames,
"<cell>",
"Outputs a list of keyspace names."},
{"GetSrvKeyspace", commandGetSrvKeyspace,
"<cell> <keyspace>",
"Outputs a JSON structure that contains information about the SrvKeyspace."},
{"GetSrvVSchema", commandGetSrvVSchema,
"<cell>",
"Outputs a JSON structure that contains information about the SrvVSchema."},
{"DeleteSrvVSchema", commandDeleteSrvVSchema,
"<cell>",
"Deletes the SrvVSchema object in the given cell."},
},
},
{
"Replication Graph", []command{
{"GetShardReplication", commandGetShardReplication,
"<cell> <keyspace/shard>",
"Outputs a JSON structure that contains information about the ShardReplication."},
},
},
{
"Workflow", []command{
{"VExec", commandVExec,
"<ks.workflow> <query> --dry-run",
"Runs query on all tablets in workflow. Example: VExec merchant.morders \"update _vt.vreplication set Status='Running'\"",
},
},
},
{
"Workflow", []command{
{"Workflow", commandWorkflow,
"<ks.workflow> <action> --dry-run",
"Start/Stop/Delete/Show/ListAll Workflow on all target tablets in workflow. Example: Workflow merchant.morders Start",
},
},
},
}
func init() {
// This cannot be in the static 'commands ' array, as commands
// would reference commandHelp that references commands
// (circular reference)
addCommand("Generic", command{"Help", commandHelp,
"[command name]",
"Prints the list of available commands, or help on a specific command."})
}
func addCommand(groupName string, c command) {
commandsMutex.Lock()
defer commandsMutex.Unlock()
for i, group := range commands {
if group.name == groupName {
commands[i].commands = append(commands[i].commands, c)
return
}
}
panic(fmt.Errorf("trying to add to missing group %v", groupName))
}
func addCommandGroup(groupName string) {
commandsMutex.Lock()
defer commandsMutex.Unlock()
commands = append(commands, commandGroup{
name: groupName,
})
}
func fmtMapAwkable(m map[string]string) string {
pairs := make([]string, len(m))
i := 0
for k, v := range m {
pairs[i] = fmt.Sprintf("%v: %q", k, v)
i++
}
sort.Strings(pairs)
return "[" + strings.Join(pairs, " ") + "]"
}
func fmtTabletAwkable(ti *topo.TabletInfo) string {
keyspace := ti.Keyspace
shard := ti.Shard
if keyspace == "" {
keyspace = "<null>"
}
if shard == "" {
shard = "<null>"
}
mtst := "<null>"
// special case for old master that hasn't updated topo yet
if ti.MasterTermStartTime != nil && ti.MasterTermStartTime.Seconds > 0 {
mtst = logutil.ProtoToTime(ti.MasterTermStartTime).Format(time.RFC3339)
}
return fmt.Sprintf("%v %v %v %v %v %v %v %v", topoproto.TabletAliasString(ti.Alias), keyspace, shard, topoproto.TabletTypeLString(ti.Type), ti.Addr(), ti.MysqlAddr(), fmtMapAwkable(ti.Tags), mtst)
}
func listTabletsByShard(ctx context.Context, wr *wrangler.Wrangler, keyspace, shard string) error {
tabletMap, err := wr.TopoServer().GetTabletMapForShard(ctx, keyspace, shard)
if err != nil {
return err
}
var trueMasterTimestamp time.Time
for _, ti := range tabletMap {
if ti.Type == topodatapb.TabletType_MASTER {
masterTimestamp := ti.GetMasterTermStartTime()
if masterTimestamp.After(trueMasterTimestamp) {
trueMasterTimestamp = masterTimestamp
}
}
}
for _, ti := range tabletMap {
masterTimestamp := ti.GetMasterTermStartTime()
if ti.Type == topodatapb.TabletType_MASTER && masterTimestamp.Before(trueMasterTimestamp) {
ti.Type = topodatapb.TabletType_UNKNOWN
}
wr.Logger().Printf("%v\n", fmtTabletAwkable(ti))
}
return nil
}
func dumpAllTablets(ctx context.Context, wr *wrangler.Wrangler, cell string) error {
tablets, err := topotools.GetAllTablets(ctx, wr.TopoServer(), cell)
if err != nil {
return err
}
// It is possible that an old master has not yet updated it's type in the topo
// In that case, report its type as UNKNOWN
// It used to be MASTER, and it is supposed to be REPLICA/SPARE eventually
trueMasterTimestamps := findTrueMasterTimestamps(tablets)
for _, ti := range tablets {
key := ti.Keyspace + "." + ti.Shard
masterTimestamp := ti.GetMasterTermStartTime()
if ti.Type == topodatapb.TabletType_MASTER && masterTimestamp.Before(trueMasterTimestamps[key]) {
ti.Type = topodatapb.TabletType_UNKNOWN
}
wr.Logger().Printf("%v\n", fmtTabletAwkable(ti))
}
return nil
}
func findTrueMasterTimestamps(tablets []*topo.TabletInfo) map[string]time.Time {
result := make(map[string]time.Time)
for _, ti := range tablets {
key := ti.Keyspace + "." + ti.Shard
if v, ok := result[key]; !ok {
result[key] = ti.GetMasterTermStartTime()
} else {
if ti.GetMasterTermStartTime().After(v) {
result[key] = ti.GetMasterTermStartTime()
}
}
}
return result
}
func dumpTablets(ctx context.Context, wr *wrangler.Wrangler, tabletAliases []*topodatapb.TabletAlias) error {
tabletMap, err := wr.TopoServer().GetTabletMap(ctx, tabletAliases)
if err != nil {
return err
}
for _, tabletAlias := range tabletAliases {
ti, ok := tabletMap[topoproto.TabletAliasString(tabletAlias)]
if !ok {
wr.Logger().Warningf("failed to load tablet %v", tabletAlias)
} else {
wr.Logger().Printf("%v\n", fmtTabletAwkable(ti))
}
}
return nil
}
// getFileParam returns a string containing either flag is not "",
// or the content of the file named flagFile
func getFileParam(flag, flagFile, name string) (string, error) {
if flag != "" {
if flagFile != "" {
return "", fmt.Errorf("action requires only one of %v or %v-file", name, name)
}
return flag, nil
}
if flagFile == "" {
return "", fmt.Errorf("action requires one of %v or %v-file", name, name)
}
data, err := ioutil.ReadFile(flagFile)
if err != nil {
return "", fmt.Errorf("cannot read file %v: %v", flagFile, err)
}
return string(data), nil
}
// keyspaceParamsToKeyspaces builds a list of keyspaces.
// It supports topology-based wildcards, and plain wildcards.
// For instance:
// us* // using plain matching
// * // using plain matching
func keyspaceParamsToKeyspaces(ctx context.Context, wr *wrangler.Wrangler, params []string) ([]string, error) {
result := make([]string, 0, len(params))
for _, param := range params {
if param[0] == '/' {
// this is a topology-specific path
result = append(result, params...)
} else {
// this is not a path, so assume a keyspace name,
// possibly with wildcards
keyspaces, err := wr.TopoServer().ResolveKeyspaceWildcard(ctx, param)
if err != nil {
return nil, fmt.Errorf("failed to resolve keyspace wildcard %v: %v", param, err)
}
result = append(result, keyspaces...)
}
}
return result, nil
}
// shardParamsToKeyspaceShards builds a list of keyspace/shard pairs.
// It supports topology-based wildcards, and plain wildcards.
// For instance:
// user/* // using plain matching
// */0 // using plain matching
func shardParamsToKeyspaceShards(ctx context.Context, wr *wrangler.Wrangler, params []string) ([]topo.KeyspaceShard, error) {
result := make([]topo.KeyspaceShard, 0, len(params))
for _, param := range params {
if param[0] == '/' {
// this is a topology-specific path
for _, path := range params {
keyspace, shard, err := topoproto.ParseKeyspaceShard(path)
if err != nil {
return nil, err
}
result = append(result, topo.KeyspaceShard{Keyspace: keyspace, Shard: shard})
}
} else {
// this is not a path, so assume a keyspace
// name / shard name, each possibly with wildcards
keyspaceShards, err := wr.TopoServer().ResolveShardWildcard(ctx, param)
if err != nil {
return nil, fmt.Errorf("failed to resolve keyspace/shard wildcard %v: %v", param, err)
}
result = append(result, keyspaceShards...)
}
}
return result, nil
}
// tabletParamsToTabletAliases takes multiple params and converts them
// to tablet aliases.
func tabletParamsToTabletAliases(params []string) ([]*topodatapb.TabletAlias, error) {
result := make([]*topodatapb.TabletAlias, len(params))
var err error
for i, param := range params {
result[i], err = topoproto.ParseTabletAlias(param)
if err != nil {
return nil, err
}
}
return result, nil
}
// parseTabletType parses the string tablet type and verifies
// it is an accepted one
func parseTabletType(param string, types []topodatapb.TabletType) (topodatapb.TabletType, error) {
tabletType, err := topoproto.ParseTabletType(param)
if err != nil {
return topodatapb.TabletType_UNKNOWN, fmt.Errorf("invalid tablet type %v: %v", param, err)
}
if !topoproto.IsTypeInList(topodatapb.TabletType(tabletType), types) {
return topodatapb.TabletType_UNKNOWN, fmt.Errorf("type %v is not one of: %v", tabletType, strings.Join(topoproto.MakeStringTypeList(types), " "))
}
return tabletType, nil
}
// parseServingTabletType3 parses the tablet type into the enum,
// and makes sure the enum is of serving type (MASTER, REPLICA, RDONLY/BATCH)
func parseServingTabletType3(param string) (topodatapb.TabletType, error) {
servedType, err := topoproto.ParseTabletType(param)
if err != nil {
return topodatapb.TabletType_UNKNOWN, err
}
if !topo.IsInServingGraph(servedType) {
return topodatapb.TabletType_UNKNOWN, fmt.Errorf("served_type has to be in the serving graph, not %v", param)
}
return servedType, nil
}
func commandInitTablet(ctx context.Context, wr *wrangler.Wrangler, subFlags *flag.FlagSet, args []string) error {
dbNameOverride := subFlags.String("db_name_override", "", "Overrides the name of the database that the vttablet uses")
allowUpdate := subFlags.Bool("allow_update", false, "Use this flag to force initialization if a tablet with the same name already exists. Use with caution.")
allowMasterOverride := subFlags.Bool("allow_master_override", false, "Use this flag to force initialization if a tablet is created as master, and a master for the keyspace/shard already exists. Use with caution.")
createShardAndKeyspace := subFlags.Bool("parent", false, "Creates the parent shard and keyspace if they don't yet exist")
hostname := subFlags.String("hostname", "", "The server on which the tablet is running")
mysqlHost := subFlags.String("mysql_host", "", "The mysql host for the mysql server")
mysqlPort := subFlags.Int("mysql_port", 0, "The mysql port for the mysql server")
port := subFlags.Int("port", 0, "The main port for the vttablet process")
grpcPort := subFlags.Int("grpc_port", 0, "The gRPC port for the vttablet process")
keyspace := subFlags.String("keyspace", "", "The keyspace to which this tablet belongs")
shard := subFlags.String("shard", "", "The shard to which this tablet belongs")
var tags flagutil.StringMapValue
subFlags.Var(&tags, "tags", "A comma-separated list of key:value pairs that are used to tag the tablet")
if err := subFlags.Parse(args); err != nil {
return err
}
if subFlags.NArg() != 2 {
return fmt.Errorf("the <tablet alias> and <tablet type> arguments are both required for the InitTablet command")
}
tabletAlias, err := topoproto.ParseTabletAlias(subFlags.Arg(0))
if err != nil {
return err
}
tabletType, err := parseTabletType(subFlags.Arg(1), topoproto.AllTabletTypes)
if err != nil {
return err
}
// create tablet record
tablet := &topodatapb.Tablet{
Alias: tabletAlias,
Hostname: *hostname,
MysqlHostname: *mysqlHost,
PortMap: make(map[string]int32),
Keyspace: *keyspace,
Shard: *shard,
Type: tabletType,
DbNameOverride: *dbNameOverride,
Tags: tags,
}
if *port != 0 {
tablet.PortMap["vt"] = int32(*port)
}
if *mysqlPort != 0 {
tablet.MysqlPort = int32(*mysqlPort)
}
if *grpcPort != 0 {
tablet.PortMap["grpc"] = int32(*grpcPort)
}
return wr.InitTablet(ctx, tablet, *allowMasterOverride, *createShardAndKeyspace, *allowUpdate)
}
func commandGetTablet(ctx context.Context, wr *wrangler.Wrangler, subFlags *flag.FlagSet, args []string) error {
if err := subFlags.Parse(args); err != nil {
return err
}
if subFlags.NArg() != 1 {
return fmt.Errorf("the <tablet alias> argument is required for the GetTablet command")
}
tabletAlias, err := topoproto.ParseTabletAlias(subFlags.Arg(0))
if err != nil {
return err
}
tabletInfo, err := wr.TopoServer().GetTablet(ctx, tabletAlias)
if err != nil {
return err
}
// Pass the embedded proto directly or jsonpb will panic.
return printJSON(wr.Logger(), tabletInfo.Tablet)
}
func commandUpdateTabletAddrs(ctx context.Context, wr *wrangler.Wrangler, subFlags *flag.FlagSet, args []string) error {
hostname := subFlags.String("hostname", "", "The fully qualified host name of the server on which the tablet is running.")
mysqlHost := subFlags.String("mysql_host", "", "The mysql host for the mysql server")
mysqlPort := subFlags.Int("mysql-port", 0, "The mysql port for the mysql daemon")
vtPort := subFlags.Int("vt-port", 0, "The main port for the vttablet process")
grpcPort := subFlags.Int("grpc-port", 0, "The gRPC port for the vttablet process")
if err := subFlags.Parse(args); err != nil {
return err
}
if subFlags.NArg() != 1 {
return fmt.Errorf("the <tablet alias> argument is required for the UpdateTabletAddrs command")
}
tabletAlias, err := topoproto.ParseTabletAlias(subFlags.Arg(0))
if err != nil {
return err
}
_, err = wr.TopoServer().UpdateTabletFields(ctx, tabletAlias, func(tablet *topodatapb.Tablet) error {
if *hostname != "" {
tablet.Hostname = *hostname
}
if *mysqlHost != "" {
tablet.MysqlHostname = *mysqlHost
}
if *vtPort != 0 || *grpcPort != 0 || *mysqlPort != 0 {
if tablet.PortMap == nil {
tablet.PortMap = make(map[string]int32)
}
if *vtPort != 0 {
tablet.PortMap["vt"] = int32(*vtPort)
}
if *grpcPort != 0 {
tablet.PortMap["grpc"] = int32(*grpcPort)
}
if *mysqlPort != 0 {
tablet.MysqlPort = int32(*mysqlPort)
}
}
return nil
})
return err
}
func commandDeleteTablet(ctx context.Context, wr *wrangler.Wrangler, subFlags *flag.FlagSet, args []string) error {
allowMaster := subFlags.Bool("allow_master", false, "Allows for the master tablet of a shard to be deleted. Use with caution.")
if err := subFlags.Parse(args); err != nil {
return err
}
if subFlags.NArg() == 0 {
return fmt.Errorf("the <tablet alias> argument must be used to specify at least one tablet when calling the DeleteTablet command")
}
tabletAliases, err := tabletParamsToTabletAliases(subFlags.Args())
if err != nil {
return err
}
for _, tabletAlias := range tabletAliases {
if err := wr.DeleteTablet(ctx, tabletAlias, *allowMaster); err != nil {
return err
}
}
return nil
}
func commandSetReadOnly(ctx context.Context, wr *wrangler.Wrangler, subFlags *flag.FlagSet, args []string) error {
if err := subFlags.Parse(args); err != nil {
return err
}
if subFlags.NArg() != 1 {
return fmt.Errorf("the <tablet alias> argument is required for the SetReadOnly command")
}
tabletAlias, err := topoproto.ParseTabletAlias(subFlags.Arg(0))
if err != nil {
return err
}
ti, err := wr.TopoServer().GetTablet(ctx, tabletAlias)
if err != nil {
return fmt.Errorf("failed reading tablet %v: %v", tabletAlias, err)
}
return wr.TabletManagerClient().SetReadOnly(ctx, ti.Tablet)
}
func commandSetReadWrite(ctx context.Context, wr *wrangler.Wrangler, subFlags *flag.FlagSet, args []string) error {
if err := subFlags.Parse(args); err != nil {
return err
}
if subFlags.NArg() != 1 {
return fmt.Errorf("the <tablet alias> argument is required for the SetReadWrite command")
}
tabletAlias, err := topoproto.ParseTabletAlias(subFlags.Arg(0))
if err != nil {
return err
}
ti, err := wr.TopoServer().GetTablet(ctx, tabletAlias)
if err != nil {
return fmt.Errorf("failed reading tablet %v: %v", tabletAlias, err)
}
return wr.TabletManagerClient().SetReadWrite(ctx, ti.Tablet)
}
func commandStartReplication(ctx context.Context, wr *wrangler.Wrangler, subFlags *flag.FlagSet, args []string) error {
if err := subFlags.Parse(args); err != nil {
return err
}
if subFlags.NArg() != 1 {
return fmt.Errorf("action StartReplication requires <tablet alias>")
}
tabletAlias, err := topoproto.ParseTabletAlias(subFlags.Arg(0))
if err != nil {
return err
}
ti, err := wr.TopoServer().GetTablet(ctx, tabletAlias)
if err != nil {
return fmt.Errorf("failed reading tablet %v: %v", tabletAlias, err)
}
return wr.TabletManagerClient().StartReplication(ctx, ti.Tablet)
}
func commandStopReplication(ctx context.Context, wr *wrangler.Wrangler, subFlags *flag.FlagSet, args []string) error {
if err := subFlags.Parse(args); err != nil {
return err
}
if subFlags.NArg() != 1 {
return fmt.Errorf("action StopReplication requires <tablet alias>")
}
tabletAlias, err := topoproto.ParseTabletAlias(subFlags.Arg(0))
if err != nil {
return err
}
ti, err := wr.TopoServer().GetTablet(ctx, tabletAlias)
if err != nil {
return fmt.Errorf("failed reading tablet %v: %v", tabletAlias, err)
}
return wr.TabletManagerClient().StopReplication(ctx, ti.Tablet)
}
func commandChangeTabletType(ctx context.Context, wr *wrangler.Wrangler, subFlags *flag.FlagSet, args []string) error {
dryRun := subFlags.Bool("dry-run", false, "Lists the proposed change without actually executing it")
if err := subFlags.Parse(args); err != nil {
return err
}
if subFlags.NArg() != 2 {
return fmt.Errorf("the <tablet alias> and <db type> arguments are required for the ChangeTabletType command")
}
tabletAlias, err := topoproto.ParseTabletAlias(subFlags.Arg(0))
if err != nil {
return err
}
newType, err := parseTabletType(subFlags.Arg(1), topoproto.AllTabletTypes)
if err != nil {
return err
}
if *dryRun {
ti, err := wr.TopoServer().GetTablet(ctx, tabletAlias)
if err != nil {
return fmt.Errorf("failed reading tablet %v: %v", tabletAlias, err)
}
if !topo.IsTrivialTypeChange(ti.Type, newType) {
return fmt.Errorf("invalid type transition %v: %v -> %v", tabletAlias, ti.Type, newType)
}
wr.Logger().Printf("- %v\n", fmtTabletAwkable(ti))
ti.Type = newType
wr.Logger().Printf("+ %v\n", fmtTabletAwkable(ti))
return nil
}
return wr.ChangeTabletType(ctx, tabletAlias, newType)
}
func commandPing(ctx context.Context, wr *wrangler.Wrangler, subFlags *flag.FlagSet, args []string) error {
if err := subFlags.Parse(args); err != nil {
return err
}
if subFlags.NArg() != 1 {
return fmt.Errorf("the <tablet alias> argument is required for the Ping command")
}
tabletAlias, err := topoproto.ParseTabletAlias(subFlags.Arg(0))
if err != nil {
return err