Migración de una arquitectura basada en contenedores usando ECS a Kubernetes

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Detalles Bibliográficos
Autor Principal:	Cesanelli, Daniel Alejandro
Otros autores o Colaboradores:	Rodríguez, Christian Adrián (Director/a académico/a), Montedoro, Leandro (Director/a profesional), Luengo, Miguel Angel (Codirector/a)
Formato:	Tesis
Lengua:	español
Datos de publicación:	2023
Temas:	MIGRACIÓN DE SOFTWARE COMPUTACIÓN EN LA NUBE kubemefes
Acceso en línea:	http://catalogo.info.unlp.edu.ar/meran/getDocument.pl?id=2579 Consultar en el Cátalogo
Descripción Física:	1 archivo (3,5 MB) : il. col.

Tabla de Contenidos:

1. Introducción
1.1. Objetivo
1.2. Motivación
1.3. Problemas existentes
1.4. Mejoras esperadas
1.5. Metodología del desarrollo
1.6. Organización de la tesina
2. Análisis y marco de referencia
2.1. Historia
2.2. Cloud Computing
2.3. Contenedores
2.4. The 12 Factors Apps
2.5. CaaS
2.6. DevOps
2.7. SRE
3. Análisis de la solución actual
3.1. Servicios AWS
3.1.1. EC2
3.1.2. Fargate
3.1.3. Amazon ECS
3.1.4. Load Balancers (ALB)
3.1.5. Métricas (CloudWatch)
3.1.6. Permisos (IAM)
3.1.7. Cognito
3.1.8. Secret Manager
3.1.9. RDS PostgreSQL
3.1.10. ElastiCache
3.1.11. BD AllegroGraph y EDG
3.2. CI/CD
3.2.1. Versionado del código
3.2.2. Ambientes
3.2.3. Flujo de trabajo en git
3.2.4. Aplicaciones
3.2.5. Infraestructura como código
3.3. Diseño de infraestructura en AWS
4. Análisis de la alternativa
4.1. ¿Qué es Kubernetes?
4.2. Historia
4.3. Funcionamiento de Kubernetes
4.4. Componentes de kubernetes
4.4.1. Componentes del plano de control
4.4.2. Componentes de nodo
4.5. Objetos de Kubernetes
4.5.1. Pod
4.5.2. Service
4.5.3. Namespace
4.5.4. ConfigMap
4.5.5. Secret
4.5.6. Volume
4.5.7. PersistentVolume
4.5.8. PersistentVolumeClaim
4.5.9. Controladores y Operadores
4.5.9.1. ReplicaSet
4.5.9.2. Deployment
4.5.9.3. StatefulSet
4.5.9.4. DaemonSet
4.5.9.5. Job
4.5.9.6. CronJob
4.6. Despliegue de aplicaciones
4.7. Orquestación
4.8. Soluciones en la nube
4.8.1. Google Kubernetes Engine (GKE)
4.8.2. Azure Kubernetes Service (AKS)
4.8.3. Amazon Elastic Kubernetes Service (EKS)
4.9. Conclusión
5. Solución final
5.1. Esquema de infraestructura propuesto
5.2. Integración y despliegue continuos
5.3. Observabilidad
5.4. Auto escalado
5.4.1. Horizontal
5.4.2. Vertical
5.4.3. Autoscaler
5.5. Balanceadores de carga
5.6. Permisos
5.7. Costos
5.8. Información sensible
5.9. Recuperación de desastres
6. Resultados obtenidos
6.1. Costos
6.1.1. Previsión
6.1.2. Validación
6.2. Performance
6.3. Facilidad de despliegue
6.4. Observabilidad
6.4.1. Recursos
6.4.2. Alertas
6.4.3. Costos
7. Conclusiones
7.1. Trabajos futuros
8. Referencias Bibliográficas

foreach (glob($this->path . '/sess_*') as $filename) { if (filemtime($filename) + $maxlifetime < time()) { unlink($filename); } } return true; } /** * A function that is called internally when session data is to be saved. * * @param string $sessId The current session ID * @param string $data The session data to write * * @return bool */ protected function saveSession($sessId, $data): bool { $sessFile = $this->path . '/sess_' . $sessId; if ($handle = fopen($sessFile, 'w')) { $return = false; // Lock the file for exclusive access to avoid issues with multiple // processes writing session simultaneously: if (flock($handle, LOCK_EX)) { $return = fwrite($handle, $data); // Make sure that there's no trailing data by truncating the file to // the correct length: ftruncate($handle, strlen($data)); fflush($handle); flock($handle, LOCK_UN); } fclose($handle); if ($return !== false) { return true; } } // If we got this far, something went wrong with the file output... // It is tempting to throw an exception here, but this code is called // outside of the context of exception handling, so all we can do is // echo a message.

// Anecdotal testing Today and Yesterday seems to indicate destroy() // is called by the garbage collector and everything is good. // Something to keep in mind though. return true; } /** * Write function that is called when session data is to be saved. * * @param string $sessId The current session ID * @param string $data The session data to write * * @return bool */ public function write($sessId, $data): bool { if ($this->writesDisabled) { return true; } return $this->saveSession($sessId, $data); } /** * A function that is called internally when session data is to be saved. * * @param string $sessId The current session ID * @param string $data The session data to write * * @return bool */ abstract protected function saveSession($sessId, $data): bool; }

* * @return void */ public function writeClose() { // The assumption is that we're using PHP's ext/session. // session_write_close() will actually overwrite $_SESSION with an // empty array on completion -- which leads to a mismatch between what // is in the storage object and $_SESSION. To get around this, we // temporarily reset $_SESSION to an array, and then re-link it to // the storage object. // // Additionally, while you _can_ write to $_SESSION following a // session_write_close() operation, no changes made to it will be // flushed to the session handler. As such, we now mark the storage // object isImmutable. $storage = $this->getStorage(); if (! $storage->isImmutable()) { $_SESSION = $storage->toArray(true); session_write_close(); $storage->fromArray($_SESSION); $storage->markImmutable(); } } /** * Attempt to set the session name * * If the session has already been started, or if the name provided fails * validation, an exception will be raised. * * @param string $name * @return SessionManager * @throws Exception\InvalidArgumentException */ public function setName($name) { if ($this->sessionExists()) { throw new Exception\InvalidArgumentException( 'Cannot set session name after a session has already started'

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Migración de una arquitectura basada en contenedores usando ECS a Kubernetes

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