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downtime_dao.go
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downtime_dao.go
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/*
Copyright 2015 Shlomi Noach, courtesy Booking.com
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 inst
import (
"fmt"
"github.com/outbrain/golib/log"
"github.com/outbrain/orchestrator/go/config"
"github.com/outbrain/orchestrator/go/db"
)
// BeginDowntime will make mark an instance as downtimed (or override existing downtime period)
func BeginDowntime(instanceKey *InstanceKey, owner string, reason string, durationSeconds uint) error {
if durationSeconds == 0 {
durationSeconds = config.Config.MaintenanceExpireMinutes * 60
}
_, err := db.ExecOrchestrator(`
insert
into database_instance_downtime (
hostname, port, downtime_active, begin_timestamp, end_timestamp, owner, reason
) VALUES (
?, ?, 1, NOW(), NOW() + INTERVAL ? SECOND, ?, ?
)
on duplicate key update
downtime_active=values(downtime_active),
begin_timestamp=values(begin_timestamp),
end_timestamp=values(end_timestamp),
owner=values(owner),
reason=values(reason)
`,
instanceKey.Hostname,
instanceKey.Port,
durationSeconds,
owner,
reason,
)
if err != nil {
return log.Errore(err)
}
AuditOperation("begin-downtime", instanceKey, fmt.Sprintf("owner: %s, reason: %s", owner, reason))
return nil
}
// EndDowntime will remove downtime flag from an instance
func EndDowntime(instanceKey *InstanceKey) error {
res, err := db.ExecOrchestrator(`
update
database_instance_downtime
set
downtime_active = NULL,
end_timestamp = NOW()
where
hostname = ?
and port = ?
and downtime_active = 1
`,
instanceKey.Hostname,
instanceKey.Port,
)
if err != nil {
return log.Errore(err)
}
if affected, _ := res.RowsAffected(); affected == 0 {
err = fmt.Errorf("Instance is not in downtime mode: %+v", instanceKey)
} else {
// success
AuditOperation("end-downtime", instanceKey, "")
}
return err
}
// ExpireDowntime will remove the maintenance flag on old downtimes
func ExpireDowntime() error {
{
res, err := db.ExecOrchestrator(`
delete from
database_instance_downtime
where
downtime_active is null
and end_timestamp < NOW() - INTERVAL ? DAY
`,
config.Config.MaintenancePurgeDays,
)
if err != nil {
return log.Errore(err)
}
if rowsAffected, _ := res.RowsAffected(); rowsAffected > 0 {
AuditOperation("expire-downtime", nil, fmt.Sprintf("Purged %d historical entries", rowsAffected))
}
}
{
res, err := db.ExecOrchestrator(`
update
database_instance_downtime
set
downtime_active = NULL
where
downtime_active = 1
and end_timestamp < NOW()
`,
)
if err != nil {
return log.Errore(err)
}
if rowsAffected, _ := res.RowsAffected(); rowsAffected > 0 {
AuditOperation("expire-downtime", nil, fmt.Sprintf("Expired %d entries", rowsAffected))
}
}
return nil
}