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January 1, 2022

About

Archive

January 1, 2022   2 minutes 388 words

Index

Author

umatare5 (Koshu T.)

  • umatare5 is an SRE working in Japan.

    He has more than 15 years of industry experience, especially with in-depth knowledge of the networking includes wireless. He is good for realtime-processing likes packet analytics, metrics monitoring and others. He is also a backend engineer using Go and TypeScript.

Jobs

Company #4

  • Software Engineer (2022/2 -)

Company #3

  • Infrastructure Engineer (2014/7 - 2022/1)

Company #2

  • Lead Infrastructure Engineer (2013/7 - 2014/4)
  • Infrastructure Engineer (2010/7 - 2013/3)

Company #1

  • Operator (2008/7 - 2010/6)
  • Intern (2008/4 - 2008/6)

Second / Part-Time

  • Engineer (2021/12 -)

Skills

Public Cloud / SaaS (2020-)

  • Compute: AWS EC2, Google Compute Engine
  • Container: AWS ECS, AWS Fargate, Google Cloud Run
  • DNS: AWS Route53, Google Cloud DNS
  • Mail: AWS SES
  • Load Balancing: AWS ALB/NLB, Google Cloud Load Balancing
  • Authentication: GCP Identity-Aware Proxy, GCP Workload Identity, Auth0
  • Log Management: AWS CloudWatch Logs, Google Cloud Logging
  • Monitoring: AWS CloudWatch, Google Cloud Monitoring, Datadog
  • Configuration Management: CloudFormation, Terraform
  • CI/CD: Github Actions
  • Batch: AWS Lambda, Google Cloud Functions, Google Apps Script
  • API: Google Cloud Endpoints
  • BackOffice: Kintone, ServiceNow ITSM

Linux (2012-)

  • DNS: BIND
  • DHCP: ISC DHCP
  • Web: Apache, Nginx, Squid
  • Mail: Postfix, Sendmail, Dovecot
  • FTP: vsftpd
  • Load Balancing: Heartbeat, LTM
  • Directory Service: OpenLDAP
  • Authentication: FreeRADIUS
  • Realtime Processing: Fluentd, Norikra
  • Log Management: Rsyslog, swatch
  • Monitoring: Nagios, Prometheus
  • Observability: Cacti, Growthforecast, Kibana, Grafana
  • Configuration Management: Chef, Ansible
  • NoSQL: MongoDB
  • Timeseries: RRDtool, Elasticsearch, InfluxDB, Cortex, Mimir
  • CI/CD: Jenkins, Drone

Networking (2012-2020, 2022-)

  • Load Balancing: F5
  • Routing and Switching: Cisco
  • Wireless: Cisco, Meraki, Aruba
  • Security: Cisco, Juniper Networks

Storage (2012-2014)

  • SAS: MSA
  • iSCSI: Lefthand
  • FC: NetApp

Virtualization (2010-2022)

  • Hypervisor: KVM, vSphere, Hyper-V
  • Security: vCenter SSO
  • Backup & Recovery: vCenter DataRecovery
  • Desktop: Horizon View
  • Application: Docker Swarm
  • Others: vCenter Server, vCenter Converter

Windows (2008-2014)

  • DNS: Microsoft DNS
  • DHCP: Microsoft DHCP
  • Web: IIS
  • Mail: IIS SMTP
  • FTP: IIS FTP
  • Load Balancing: NLB, MSFC
  • Directory Service: Active Directory
  • Authentication: ADCS, NPS
  • Security: WSUS
  • Backup & Recovery: BackupExec
  • Batch: JP1/AJS

Programming (2008-)

  • Powershell: 1 to 2 (2008-2014)
  • ASP.NET and C#.NET: 2.0 to 3.5 (2012-2014)
  • Ruby: 2.3 to 2.7 (2016-2020)
  • TypeScript: 2.2 to latest (2016-)
  • Go: 1.15 to latest (2020-)

Others (2008-)

  • Documentation: Lotus Notes, Word, Confluence, Notion, Google Docs
  • Drawing: Visio, PowerPoint, Cacoo, Google Slide, draw.io, Lucidchart

Qualifications

  • Amateur Third-Class Radio Operator
  • Maritime Ⅱ-Category Special Radio Operator
  • On-The-Ground Ⅲ-Category Special Radio Operator