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smd-init.go
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smd-init.go
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// MIT License
//
// (C) Copyright [2019-2023] Hewlett Packard Enterprise Development LP
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the "Software"),
// to deal in the Software without restriction, including without limitation
// the rights to use, copy, modify, merge, publish, distribute, sublicense,
// and/or sell copies of the Software, and to permit persons to whom the
// Software is furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included
// in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
// THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
// OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
// ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
// OTHER DEALINGS IN THE SOFTWARE.
package main
import (
"database/sql"
"flag"
"log"
"os"
"strconv"
"time"
"github.com/golang-migrate/migrate/v4"
"github.com/golang-migrate/migrate/v4/database/postgres"
_ "github.com/golang-migrate/migrate/v4/source/file"
_ "github.com/lib/pq"
"github.com/Cray-HPE/hms-smd/v2/internal/hmsds"
)
const APP_VERSION = "1"
const SCHEMA_VERSION = 20
const SCHEMA_STEPS = 22
var dbName string
var dbUser string
var dbPass string
var dbHost string
var dbPortStr string
var dbPort int
var dbOpts string
var forceStep int
var migrateStep uint
var fresh *bool
var versionFlag *bool
// Parse command line options.
func parseCmdLine() {
flag.StringVar(&dbName, "dbname", "", "Database name (default 'hmsds'")
flag.StringVar(&dbUser, "dbuser", "", "Database user name")
flag.StringVar(&dbHost, "dbhost", "", "Database hostname")
flag.StringVar(&dbPortStr, "dbport", "", "Database port")
flag.StringVar(&dbOpts, "dbopts", "", "Database options string")
flag.IntVar(&forceStep, "f", -1, "Force migration to step X")
fresh = flag.Bool("fresh", false,
"Revert all schemas before installing (drops all data)")
versionFlag = flag.Bool("v", false, "Print the version number.")
flag.Parse()
if *versionFlag {
lg.Printf("Version: %s, Schema version: %d",
APP_VERSION, SCHEMA_VERSION)
}
envvar := "SMD_DBNAME"
if dbName == "" {
if val := os.Getenv(envvar); val != "" {
dbName = val
}
}
envvar = "SMD_DBUSER"
if dbUser == "" {
if val := os.Getenv(envvar); val != "" {
dbUser = val
}
}
envvar = "SMD_DBHOST"
if dbHost == "" {
if val := os.Getenv(envvar); val != "" {
dbHost = val
}
}
envvar = "SMD_DBPORT"
if dbPortStr == "" {
if val := os.Getenv(envvar); val != "" {
dbPortStr = val
}
}
if dbPortStr == "" {
lg.Printf("Missing DB port number")
flag.Usage()
os.Exit(1)
} else {
port, err := strconv.ParseInt(dbPortStr, 10, 64)
if err != nil {
lg.Printf("Bad dbport '%s': %s", dbPortStr, err)
flag.Usage()
os.Exit(1)
}
dbPort = int(port)
}
envvar = "SMD_DBOPTS"
if dbOpts == "" {
if val := os.Getenv(envvar); val != "" {
dbOpts = val
}
}
envvar = "SMD_FORCESTEP"
if forceStep == -1 {
if val := os.Getenv(envvar); val != "" {
step, err := strconv.ParseInt(val, 10, 64)
if err != nil {
lg.Printf("Bad step for forceStep: '%s': %s", val, err)
flag.Usage()
os.Exit(1)
}
forceStep = int(step)
if forceStep < 0 || forceStep > SCHEMA_STEPS {
lg.Printf("invalid step for forceStep: '%s': out of range", val)
flag.Usage()
os.Exit(1)
}
}
}
envvar = "SMD_DBSTEPS"
if val := os.Getenv(envvar); val != "" {
step, err := strconv.ParseInt(val, 10, 64)
if err != nil {
lg.Printf("Bad step for DB Steps: '%s': %s", val, err)
os.Exit(1)
}
if step < 0 || step > SCHEMA_STEPS {
lg.Printf("invalid step for DB Steps: '%s': out of range.", val)
os.Exit(1)
}
migrateStep = uint(step)
} else {
migrateStep = uint(SCHEMA_STEPS)
}
envvar = "SMD_FRESH"
if *fresh == false {
if val := os.Getenv(envvar); val != "" {
*fresh = true
}
}
// Env var only
envvar = "SMD_DBPASS"
if val := os.Getenv(envvar); val != "" {
dbPass = val
}
// Set default dbName
if dbName == "" {
dbName = "hmsds"
}
// Set default dbUser
if dbUser == "" {
dbUser = "hmsdsuser"
}
}
var lg = log.New(os.Stdout, "", log.Lshortfile|log.LstdFlags|log.Lmicroseconds)
func main() {
parseCmdLine()
lg.Printf("smd-init: Starting...")
lg.Printf("smd-init: Version: %s, SchemaVersion: %d, Steps: %d, Desired Step: %d",
APP_VERSION, SCHEMA_VERSION, SCHEMA_STEPS, migrateStep)
dbDSN := hmsds.GenDsnHMSDB_PB(dbName, dbUser, dbPass, dbHost, dbOpts, dbPort)
if dbDSN == "" {
lg.Printf("Empty DSN created via flag or db options\n")
flag.Usage()
os.Exit(1)
}
db, err := sql.Open("postgres", dbDSN)
for {
if err != nil {
lg.Printf("Open failed: '%s'", err)
lg.Printf("Retrying after 5 seconds...")
time.Sleep(5 * time.Second)
db, err = sql.Open("postgres", dbDSN)
} else {
break
}
}
for {
err := db.Ping()
if err != nil {
lg.Printf("Ping failed: '%s'", err)
lg.Printf("Retrying after 5 seconds...")
time.Sleep(5 * time.Second)
} else {
break
}
}
lg.Printf("Connected to postgres successfully")
driver, err := postgres.WithInstance(db, &postgres.Config{})
if err != nil {
lg.Printf("Creating postgres driver failed: '%s'", err)
os.Exit(1)
}
lg.Printf("Creating postgres driver succeeded")
m, err := migrate.NewWithDatabaseInstance(
"file:///persistent_migrations",
"postgres", driver)
if err != nil {
lg.Printf("Creating migration failed: '%s'", err)
os.Exit(1)
}
if m == nil {
lg.Printf("Creating migration failed: nil pointer")
os.Exit(1)
}
defer m.Close()
lg.Printf("Creating migration succeeded")
// Drop all tables.
if *fresh {
err = m.Down()
if err != nil {
lg.Printf("Migration: Down() failed: '%s'", err)
os.Exit(1)
}
lg.Printf("Migration: Down() succeeded!")
}
// User-defined force, doesn't matter if dirty or not
if forceStep >= 0 {
err = m.Force(forceStep)
if err != nil {
lg.Printf("Migration: Force(%d) failed: '%s'", forceStep, err)
os.Exit(1)
}
lg.Printf("Migration: Force(%d) succeeded!", forceStep)
}
noVersion := false
version, dirty, err := m.Version()
if err == migrate.ErrNilVersion {
lg.Printf("Migration: Version: No version (%d) yet", version)
noVersion = true
} else if err != nil {
lg.Printf("Migration: Version() failed unexpectedly: '%s'", err)
os.Exit(1)
} else {
lg.Printf("Migration: At step version %d, dirty: %t", version, dirty)
}
if dirty == true && forceStep < 0 {
// Force current version to remove dirty flag. We'd prefer to avoid
// this situation in the first place.
err = m.Force(int(version))
if err != nil {
lg.Printf("Migration: (Dirty) Force(%d) failed: '%s'", version, err)
os.Exit(1)
}
lg.Printf("Migration: (Dirty) Force(%d) succeeded!", version)
}
// Initial install - migrate all the way up.
if noVersion {
lg.Printf("Migration: Initial install, call Up()...")
err = m.Up()
if err == migrate.ErrNoChange {
lg.Printf("Migration: Up(): WARNING: No changes required?")
} else if err != nil {
lg.Printf("Migration: Up() failed: '%s'", err)
os.Exit(1)
} else {
lg.Printf("Migration: Up() succeeded!")
}
} else if version != migrateStep {
if version < migrateStep {
lg.Printf("Migration: DB at step %d/%d. Updating...", version, migrateStep)
} else {
lg.Printf("Migration: DB at step %d/%d. Downgrading...", version, migrateStep)
}
err = m.Migrate(migrateStep)
if err == migrate.ErrNoChange {
lg.Printf("Migration: Migrate(%d): No changes required?", migrateStep)
} else if err != nil {
lg.Printf("Migration: Migrate(%d) failed: '%s'", migrateStep, err)
os.Exit(1)
} else {
lg.Printf("Migration: Migrate(%d) succeeded!", migrateStep)
}
} else {
lg.Printf("Migration: Already at expected step. Nothing to do.")
os.Exit(0)
}
version2, dirty2, err := m.Version()
if err == migrate.ErrNilVersion {
lg.Printf("Migration: NO VERSION AFTER MIGRATE (%d) yet", version2)
} else if err != nil {
lg.Printf("Migration: Version() failed unexpectedly: '%s'", err)
os.Exit(1)
} else {
lg.Printf("Migration: At step version %d, dirty: %t", version2, dirty2)
}
}