kyontan

GoでISUCONを戦う話

mercari.go #4 https://mercari.connpass.com/event/105640/

自己紹介

• catatsuyというIDで各種SNS活動しています
  • かたついって呼ばれています
• メルカリのSREチームで主にGoを書いています
• 前職はピクシブでpixivのHTTPS化・PHP7.1化・HTTP/2化や、広告サーバーの新機能追加など色々やっていました

kyontan

集合

9:00にオフィス(Sticky Fingers)

食料品は事前に用意しておく。食べ過ぎない。胃に負担をかけないようにする。

運営の櫛井さんからのメールに従って、サポートチャットと予選ポータルサイトにログインする。

• ISUCON6 予選レギュレーション
• メール: ISUCON6 オンライン予選 当日の流れについて

kyontan

ggr: get github link

Usage

$ ls
hoge.sh
$ ggr hoge.sh
https://github.com/org/repo/blob/commithash/path_to_hoge_sh/hoge.sh
$ ggr hoge.sh 4

kyontan

aws assume-role helper script

Usage

You can use:

1. aws command with credentials (that is already assume-role'ed) via: $ assume aws ...
2. Set assume-role'ed credentials to current shell via: eval $(assume)

Settings

kyontan

2021-07-29T03:11:56.234169Z 0 [Note] [MY-010098] [Server] --secure-file-priv is set to NULL. Operations related to importing and exporting data are disabled
2021-07-29T03:11:56.234218Z 0 [Note] [MY-010949] [Server] Basedir set to /usr/local/mysql/.
2021-07-29T03:11:56.234230Z 0 [System] [MY-010116] [Server] /usr/local/mysql/bin/mysqld (mysqld 8.0.25) starting as process 1
2021-07-29T03:11:56.436463Z 0 [Note] [MY-012366] [InnoDB] Using Linux native AIO
2021-07-29T03:11:56.436607Z 0 [Note] [MY-010747] [Server] Plugin 'FEDERATED' is disabled.
2021-07-29T03:11:56.438916Z 1 [System] [MY-013576] [InnoDB] InnoDB initialization has started.
2021-07-29T03:11:56.439002Z 1 [Note] [MY-013546] [InnoDB] Atomic write enabled
2021-07-29T03:11:56.439053Z 1 [Note] [MY-012932] [InnoDB] PUNCH HOLE support available
2021-07-29T03:11:56.439084Z 1 [Note] [MY-012944] [InnoDB] Uses event mutexes
2021-07-29T03:11:56.439112Z 1 [Note] [MY-012945] [InnoDB] GCC builtin __atomic_thread_fence() is used for memory barrier

kyontan

function _delegate() {
  local cur subs
  cur="${COMP_WORDS[COMP_CWORD]}" # partial word, if any
  subs=$(envchain -l)
  # echo "cword: $COMP_CWORD"
  # echo "cw: ${COMP_WORDS[COMP_CWORD]}"
  # echo "cl: ${COMP_LINE}, ccw: ${COMP_CWORD}, cp: ${COMP_POINT}, cw3: ${COMP_WORDS[2]}"

  if [[ $COMP_CWORD == 1 ]]; then
    # complete with the list of subcommands 

kyontan

To use this script, set environment variables below:

AWS_ROLE_ARN=arn:aws:iam::XXX:role/XXX
AWS_ROLE_SESSION_NAME=a_role_accessed_from_cli
AWS_ACCESS_KEY_ID=
AWS_SECRET_ACCESS_KEY=
AWS_DEFAULT_REGION=

kyontan

$ envchain -s minio AWS_ACCESS_KEY_ID
minio.AWS_ACCESS_KEY_ID: XXX
$ envchain -s minio AWS_SECRET_ACCESS_KEY
minio.AWS_SECRET_ACCESS_KEY: XXX
$ envchain minio docker run --rm -it -e AWS_ACCESS_KEY_ID -e AWS_SECRET_ACCESS_KEY amazon/aws-cli --endpoint-url https://[MinIO Endpoint] s3 ls

kyontan

apiVersion: apps/v1
kind: Deployment
metadata:
  labels:
    app: wordpress
  name: blog
  namespace: default
spec:
  replicas: 1
  selector:

kyontan

# not used, copied function body into _delegate
function _executables {
    local exclude=$(compgen -abkA function | sort)
    local executables=$(
        comm -23 <(compgen -c) <(echo $exclude)
        type -tP $( comm -12 <(compgen -c) <(echo $exclude) )
    )
    COMPREPLY=( $(compgen -W "$executables" -- ${COMP_WORDS[COMP_CWORD]}) )
}