WARNING: [pool www] child 17248 exited on signal 11 (SIGSEGV)

$ cat /proc/sys/kernel/core_pattern
core

echo '/tmp/core-%e-%p' > /proc/sys/kernel/core_pattern

$ cat /proc/sys/kernel/core_pattern
|/usr/lib/systemd/systemd-coredump %P %u %g %s %t %c %h %e

$ coredumpctl list
TIME                            PID   UID   GID SIG COREFILE  EXE
Sun 2020-12-06 22:29:22 JST    3252  1000  1000  11 present   /usr/bin/bash

$ coredumpctl info 3252
           PID: 3252 (segv.sh)
           UID: 1000 (unamu)
           GID: 1000 (unamu)
        Signal: 11 (SEGV)
     Timestamp: Sun 2020-12-06 22:29:21 JST (6min ago)
  Command Line: /bin/bash ./segv.sh
    Executable: /usr/bin/bash
 Control Group: /user.slice/user-1000.slice/user@1000.service/gnome-terminal-server.service
          Unit: user@1000.service
     User Unit: gnome-terminal-server.service
         Slice: user-1000.slice
     Owner UID: 1000 (unamu)
       Boot ID: 35a2b597dc5a4a6ebe37fd3a7e97bd73
    Machine ID: c4f822f021d5433ab143f054bca5b672
      Hostname: localhost.localdomain
       Storage: /var/lib/systemd/coredump/core.segv\x2esh.1000.35a2b597dc5a4a6ebe37fd3a7e97bd73.3252.1607261361000000.lz4
       Message: Process 3252 (segv.sh) of user 1000 dumped core.
                
                Stack trace of thread 3252:
                #0  0x00007fe849946d79 _int_malloc (libc.so.6)
                #1  0x00007fe84994850e malloc (libc.so.6)
                #2  0x00005625a34934c2 xmalloc (bash)

$ cat /proc/self/limits
Limit                     Soft Limit           Hard Limit           Units     
Max cpu time              unlimited            unlimited            seconds   
Max file size             unlimited            unlimited            bytes     
Max data size             unlimited            unlimited            bytes     
Max stack size            8388608              unlimited            bytes     
Max core file size        unlimited            unlimited            bytes     
Max resident set          unlimited            unlimited            bytes     
Max processes             3140                 3140                 processes 
Max open files            1024                 262144               files     
Max locked memory         65536                65536                bytes     
Max address space         unlimited            unlimited            bytes     
Max file locks            unlimited            unlimited            locks     
Max pending signals       3140                 3140                 signals   
Max msgqueue size         819200               819200               bytes     
Max nice priority         0                    0                    
Max realtime priority     0                    0                    
Max realtime timeout      unlimited            unlimited            us

$ ulimit -c unlimited

#!/bin/bash
function func {
    func
}
func

# ./segv.sh 
Segmentation fault (コアダンプ)
# ls /tmp
core-segv.sh-41856

# gdb /bin/bash /tmp/core-segv.sh-41856

GNU gdb (GDB) Red Hat Enterprise Linux 8.2-11.el8
Copyright (C) 2018 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.
Type "show copying" and "show warranty" for details.
This GDB was configured as "x86_64-redhat-linux-gnu".
Type "show configuration" for configuration details.
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>.
Find the GDB manual and other documentation resources online at:
    <http://www.gnu.org/software/gdb/documentation/>.

For help, type "help".
Type "apropos word" to search for commands related to "word"...
Reading symbols from /bin/bash...Reading symbols from .gnu_debugdata for /usr/bin/bash...(no debugging symbols found)...done.
(no debugging symbols found)...done.

warning: core file may not match specified executable file.
[New LWP 41856]

warning: Loadable section ".note.gnu.property" outside of ELF segments
Core was generated by `/bin/bash ./segv.sh'.
Program terminated with signal SIGSEGV, Segmentation fault.
#0  0x000055b592ffb6db in expand_word_list_internal ()
Missing separate debuginfos, use: yum debuginfo-install bash-4.4.19-10.el8.x86_64
(gdb)

(gdb) bt
#0  0x000055b592ffb6db in expand_word_list_internal ()
#1  0x000055b592fd2fa7 in execute_simple_command ()
#2  0x000055b592fd51a6 in execute_command_internal ()
#3  0x000055b592fd4ab5 in execute_command_internal ()
#4  0x000055b592fd7a79 in execute_function.isra ()
#5  0x000055b592fd4124 in execute_simple_command ()
#6  0x000055b592fd51a6 in execute_command_internal ()
#7  0x000055b592fd4ab5 in execute_command_internal ()
#8  0x000055b592fd7a79 in execute_function.isra ()
#9  0x000055b592fd4124 in execute_simple_command ()

apiVersion: apps/v1
kind: ReplicaSet
metadata:
  name: echo-summer
  labels:
    app: echo
    release: summer
spec:
  replicas: 2
  selector:
    matchLabels:
      app: echo
      release: summer
  template:
    metadata:
      labels:
        app: echo
        release: summer
    spec:
      containers:
      - name: nginx
        image: gihyodocker/nginx:latest
        env:
        - name: BACKEND_HOST
          value: localhost:8080
        ports:
        - containerPort: 80
      - name: echo
        image: gihyodocker/echo:latest
        ports:
        - containerPort: 8080

apiVersion: v1
kind: Service
metadata:
  name: "echo"
spec:
  type: NodePort
  selector:
    app: echo
    release: summer
  ports:
    - port: 80
      targetPort: 80
      protocol: TCP

apiVersion: extensions/v1beta1
kind: Ingress
metadata:
  name: "echo"
  annotations:
    kubernetes.io/ingress.class: alb # Ingress が ALB Ingress Controllerを使用することを設定
    alb.ingress.kubernetes.io/scheme: internet-facing
    alb.ingress.kubernetes.io/target-type: ip # Serviceでアクセス経路が作成されたPodにトラフィックをルーティングすることを設定
  labels:
    app: echo
spec:
  rules:
    - http:
        paths:
          - path: /*
            backend:
              serviceName: "echo"
              servicePort: 80

{
    kind: "Status",
    apiVersion: "v1",
    metadata: { },
    status: "Failure",
    message: "no endpoints available for service "kubernetes-dashboard"",
    reason: "ServiceUnavailable",
    code: 503
}

eksctl create fargateprofile \
    --name fp-kubernetes-dashboard \
    --namespace kubernetes-dashboard \
    --cluster {クラスター名}

├── main.py
├── models
│   └── item.py
└──services
    └── item_service.py

item_service.py

from models.item import Item

class ItemServiceModel:
    def search():
        ...

if __name__ == '__main__':
    ItemServiceModel.search()

export PYTHONPATH=$PYTHONPATH:{main.pyのあるディレクトリの絶対パス}

def test(x):
    return x * 2


a = [[3,2,1],[5,4,6],[5,4,6]]
a = [*map(lambda x: test(x), a)]
print(a)

# print出力
[[3, 2, 1, 3, 2, 1], [5, 4, 6, 5, 4, 6], [5, 4, 6, 5, 4, 6]]

print(*[1, 2, 3])
# print出力
1 2 3

import numpy as np
test = np.array([1000, 2000, None])
print(test[[False, True, True]])

# print出力
[2000 None]

cat > test.txt
test
hoge
poyo
poke
111
control+d

-A num, --after-context=num
             Print num lines of trailing context after each match.  See also the -B and -C options.

~/Desktop ❯❯❯ grep test test.txt --after-context=3
test
hoge
poyo
poke

~/Desktop ❯❯❯ grep test test.txt --after-context 3
test
hoge
poyo
poke

--colour=[when, --color=[when]]
             Mark up the matching text with the expression stored in GREP_COLOR environment variable.  The possible
             values of when can be `never', `always' or `auto'.

~/Desktop ❯❯❯ grep test test.txt --colour=never
test

~/Desktop ❯❯❯ grep test test.txt --colour never
test.txt:test
grep: never: No such file or directory

~/Desktop ❯❯❯ grep test --colour test.txt
test

left join posts as p2 on posts.created_at < p2.created_at where p2.id is null

いつもAmazon アソシエイト・プログラムをご利用いただき、誠にありがとうございます。

本日付で、お客様のアソシエイト・プログラムアカウントを閉鎖させていただきました。

お客様のアカウントが閉鎖となった理由：
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調査により、当社は、お客様が以下に記載の運営規約を遵守していないと判断しました。

Amazonアソシエイト・プログラム運営規約: <https://affiliate.amazon.co.jp/help/operating/agreement>

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-貴殿のサイトの特別リンク経由で行われた購入は、個人的な使用、再販、商業的使用、または貴殿の友人、親戚、従業員、請負業者、ビジネス関係者によるものです。

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運営規約違反と判断致しましたので、閉鎖されたアカウントの再開、および該当のアカウントについての紹介料の支払いは行われません。また、Amazonは、その裁量で予告なく、ご利用中の別アカウントまたは今後作成されるアカウントを閉鎖し、紹介料の支払いを停止する権利を留保します。

なお、限定的ではありますが、本閉鎖については不服申立が可能である場合がございます。詳細については、ここに記載の「不服申立」のヘルプを参照してください。<https://affiliate.amazon.co.jp/help/node/topic/GACDBRFKVDTXSPTH>.

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