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collector.go
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collector.go
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package diagnostics
import (
"archive/zip"
"context"
"encoding/csv"
"errors"
"fmt"
"io"
"strconv"
sq "github.com/Masterminds/squirrel"
"github.com/hashicorp/go-multierror"
"github.com/treeverse/lakefs/pkg/block"
"github.com/treeverse/lakefs/pkg/catalog"
"github.com/treeverse/lakefs/pkg/db"
pyramidparams "github.com/treeverse/lakefs/pkg/pyramid/params"
)
// Collector collects diagnostics information and write the collected content into a writer in a zip format
type Collector struct {
catalog catalog.Interface
adapter block.Adapter
pyramidCfg *pyramidparams.ExtParams
db db.Database
}
// NewCollector accepts database to work with during collect
func NewCollector(adb db.Database, catalog catalog.Interface, cfg *pyramidparams.ExtParams, adapter block.Adapter) *Collector {
return &Collector{
catalog: catalog,
pyramidCfg: cfg,
adapter: adapter,
db: adb,
}
}
const (
maxRecordsPerQueryCollect = 1000
csvFileExt = ".csv"
)
var errNoColumnsFound = errors.New("no columns found")
// Collect query information from the database into csv files and write everything to io writer
func (c *Collector) Collect(ctx context.Context, w io.Writer) error {
writer := zip.NewWriter(w)
combinedErr := c.collectDB(ctx, writer)
if err := c.rangesStats(ctx, writer); err != nil {
combinedErr = multierror.Append(combinedErr, err)
}
if err := writeErrors(writer, combinedErr); err != nil {
combinedErr = multierror.Append(combinedErr, fmt.Errorf("write errors: %w", err))
}
if err := writer.Close(); err != nil {
combinedErr = multierror.Append(combinedErr, err)
}
return combinedErr
}
// collectDB query information from the database into csv files and write everything to io writer
func (c *Collector) collectDB(ctx context.Context, writer *zip.Writer) error {
var combinedErr error
contentFromTables := []string{
"auth_installation_metadata",
"schema_migrations",
"pg_stat_database",
}
for _, tbl := range contentFromTables {
if err := c.writeTableContent(ctx, writer, tbl); err != nil {
combinedErr = multierror.Append(combinedErr, fmt.Errorf("write table content for %s: %w", tbl, err))
}
}
countFromTables := []string{
"auth_users",
"graveler_staging_kv",
"graveler_repositories",
"graveler_branches",
"graveler_commits",
"graveler_tags",
}
for _, tbl := range countFromTables {
if err := c.writeTableCount(ctx, writer, tbl); err != nil {
combinedErr = multierror.Append(combinedErr, fmt.Errorf("write table count for %s: %w", tbl, err))
}
}
if err := c.writeRawQueryContent(ctx, writer, "db_version", `SELECT version();`); err != nil {
combinedErr = multierror.Append(combinedErr, fmt.Errorf("get db version %w", err))
}
if err := c.writeRawQueryContent(ctx, writer, "table_sizes", `
SELECT *, pg_size_pretty(total_bytes) AS total
, pg_size_pretty(index_bytes) AS INDEX
, pg_size_pretty(toast_bytes) AS toast
, pg_size_pretty(table_bytes) AS TABLE
FROM (SELECT *, total_bytes-index_bytes-COALESCE(toast_bytes,0) AS table_bytes FROM (
SELECT c.oid,nspname AS table_schema, relname AS TABLE_NAME
, c.reltuples AS row_estimate
, pg_total_relation_size(c.oid) AS total_bytes
, pg_indexes_size(c.oid) AS index_bytes
, pg_total_relation_size(reltoastrelid) AS toast_bytes
FROM pg_class c
LEFT JOIN pg_namespace n ON n.oid = c.relnamespace
WHERE relkind = 'r') a) a`); err != nil {
combinedErr = multierror.Append(combinedErr, fmt.Errorf("get table sizes %w", err))
}
return combinedErr
}
func (c *Collector) writeTableContent(ctx context.Context, writer *zip.Writer, name string) error {
q := sq.Select("*").From(name)
return c.writeQueryContent(ctx, writer, name, q)
}
func (c *Collector) writeQueryContent(ctx context.Context, writer *zip.Writer, name string, selectBuilder sq.SelectBuilder) error {
q := selectBuilder.Limit(maxRecordsPerQueryCollect)
query, args, err := q.ToSql()
if err != nil {
return fmt.Errorf("query build: %w", err)
}
return c.writeRawQueryContent(ctx, writer, name, query, args...)
}
func (c *Collector) writeRawQueryContent(ctx context.Context, writer *zip.Writer, name string, query string, args ...interface{}) error {
_, err := c.db.Transact(ctx, func(tx db.Tx) (interface{}, error) {
rows, err := tx.Query(query, args...)
if err != nil {
return nil, fmt.Errorf("execute query: %w", err)
}
defer rows.Close()
filename := name + csvFileExt
w, err := writer.Create(filename)
if err != nil {
return nil, fmt.Errorf("new file for table %s - %w", name, err)
}
csvWriter := csv.NewWriter(w)
defer csvWriter.Flush()
first := true
for rows.Next() {
// write csv header row
if first {
first = false
descriptions := rows.FieldDescriptions()
if len(descriptions) == 0 {
return nil, errNoColumnsFound
}
cols := make([]string, len(descriptions))
for i, fd := range descriptions {
cols[i] = string(fd.Name)
}
if err := csvWriter.Write(cols); err != nil {
return nil, fmt.Errorf("write csv header for %s: %w", name, err)
}
}
// format and write data row
v, err := rows.Values()
if err != nil {
return nil, err
}
record := make([]string, len(v))
for i := range v {
record[i] = fmt.Sprintf("%v", v[i])
}
if err := csvWriter.Write(record); err != nil {
return nil, err
}
}
return nil, rows.Err()
}, db.ReadOnly())
return err
}
func (c *Collector) writeTableCount(ctx context.Context, writer *zip.Writer, name string) error {
q := sq.Select("COUNT(*)").From(name)
return c.writeQueryContent(ctx, writer, name+"_count", q)
}
func (c *Collector) rangesStats(ctx context.Context, writer *zip.Writer) error {
var combinedErr error
repos, _, err := c.catalog.ListRepositories(ctx, -1, "", "")
if err != nil {
// Cannot list repos, nothing to do..
combinedErr = multierror.Append(combinedErr, fmt.Errorf("listing repositories: %w", err))
return combinedErr
}
rangesFile, err := writer.Create("graveler-ranges")
if err != nil {
combinedErr = multierror.Append(combinedErr, fmt.Errorf("creating ranges file: %w", err))
return combinedErr
}
csvWriter := csv.NewWriter(rangesFile)
defer csvWriter.Flush()
if err := csvWriter.Write([]string{"repo", "type", "count(max:1000)"}); err != nil {
combinedErr = multierror.Append(combinedErr, fmt.Errorf("writing headers: %w", err))
}
for _, repo := range repos {
count := 0
counter := func(id string) error {
count++
return nil
}
if err := c.adapter.Walk(ctx, block.WalkOpts{
StorageNamespace: repo.StorageNamespace,
Prefix: c.pyramidCfg.BlockStoragePrefix,
}, counter); err != nil {
combinedErr = multierror.Append(combinedErr, fmt.Errorf("listing ranges and meta-ranges: %w", err))
}
if err := csvWriter.Write([]string{repo.Name, "range", strconv.Itoa(count)}); err != nil {
combinedErr = multierror.Append(combinedErr, fmt.Errorf("writing meta-ranges for repo (%s): %w", repo.Name, err))
}
}
return combinedErr
}
func writeErrors(writer *zip.Writer, err error) error {
if err == nil {
return nil
}
w, e := writer.Create("errors.log")
if e != nil {
return e
}
_, e = fmt.Fprint(w, err.Error())
return e
}