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Adding db connection retry in osctrl-api #377

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merged 1 commit into from
Dec 11, 2023
Merged

Adding db connection retry in osctrl-api #377

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23 changes: 15 additions & 8 deletions api/main.go
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Original file line number Diff line number Diff line change
Expand Up @@ -51,6 +51,8 @@ const (
defJWTConfigurationFile = "config/jwt.json"
// Default refreshing interval in seconds
defaultRefresh int = 300
// Default timeout to attempt backend reconnect
defaultBackendRetryTimeout int = 7
)

// Paths
Expand Down Expand Up @@ -86,11 +88,6 @@ const (
apiSettingsPath = "/settings"
)

var (
// Wait for backend in seconds
backendWait = 7 * time.Second
)

// Global variables
var (
err error
Expand Down Expand Up @@ -344,6 +341,13 @@ func init() {
EnvVars: []string{"DB_CONN_MAX_LIFETIME"},
Destination: &dbConfig.ConnMaxLifetime,
},
&cli.IntFlag{
Name: "db-conn-retry",
Value: defaultBackendRetryTimeout,
Usage: "Time in seconds to retry the connection to the database, if set to 0 the service will stop if the connection fails",
EnvVars: []string{"DB_CONN_RETRY"},
Destination: &dbConfig.ConnRetry,
},
&cli.BoolFlag{
Name: "tls",
Aliases: []string{"t"},
Expand Down Expand Up @@ -411,10 +415,13 @@ func osctrlAPIService() {
break
}
if err != nil {
log.Fatalf("Failed to connect to backend - %v", err)
log.Printf("Failed to connect to backend - %v", err)
if dbConfig.ConnRetry == 0 {
log.Fatalf("Connection to backend failed and no retry was set")
}
}
log.Println("Backend NOT ready! waiting...")
time.Sleep(backendWait)
log.Printf("Backend NOT ready! Retrying in %d seconds...\n", dbConfig.ConnRetry)
time.Sleep(time.Duration(dbConfig.ConnRetry) * time.Second)
}
// Redis - cache
redis, err = cache.CreateRedisManager(redisConfig)
Expand Down