TyeolRik

현재: ProLinux 8.6

/dev/sdc 가 공유볼륨이라는 사실은
1. DB1 에서 dd if=/dev/urandom of=/dev/sdc bs=4K count=1 날림.
2. DB1, DB2 에서 hexdump /dev/sdc -C 로 같은 값이 나오는지 확인.
3. 공유볼륨 확인 완료.

모든 노드에 대해
1. dnf install lvm2-lockd gfs2-utils dlm-lib -y
2. /etc/hosts 에 10.0.2.22 GFS-DB1 / 10.0.2.21 GFS-DB2 추가

TyeolRik

#!/bin/bash

# 관련한 모든 rpm 들 설치 (with dependencies)
dnf download --resolve --alldeps <package_name_1> ...

TyeolRik

#!/bin/bash
# This is really dangerous command.
# Please be CAREFUL

TARGET_OSD_ID="$1"       # 6
TARGET_HOST_NAME=$(ceph orch ps --daemon_type osd --format json| jq -r '.[] | select(.daemon_id == '\""$TARGET_OSD_ID"\"') | .hostname')
TARGET_DAEMON_NAME=$(ceph orch ps --daemon_type osd --format json | jq -r '.[] | select(.daemon_id == '\""$TARGET_OSD_ID"\"') | .daemon_name')
TARGET_OSD_DEV_PATH=$(ceph device ls-by-host "${TARGET_HOST_NAME}" --format json | jq -r '.[] | select(.daemons[] | contains('\""${TARGET_DAEMON_NAME}"\"')) | .location[] | .dev')

# ceph orch ls --service_type osd --format json | jq -c '.[] | select(.spec.data_devices.paths != null) | select(.spec.data_devices.paths[] | contains('\"${TARGET_OSD_DEV_PATH}\"')) | select(.placement.hosts != null) | select(.placement.hosts[] | contains('\"${TARGET_HOST_NAME}\"'))'

TyeolRik

#!/bin/bash

version=$(git rev-parse HEAD | cut -c1-8)
version="0.1.7-nightly-$version"

sed -i "/EXTCTRL_VERSION = \"/c\    EXTCTRL_VERSION = \"$version\";" ./main.cpp

TyeolRik

# ceph orch apply -i add_osd.yaml
service_type: osd
service_id: osd_localhost
placement:
  hosts:
  - node1
data_devices:
  paths:
  - /dev/sdb
  - /dev/sdc

TyeolRik

#!/bin/bash

function snakecase_to_camelCase() {
    local ret
    ret=$(echo $1 | sed -E 's/_(.)/\U\1/g')
    echo "$ret"
}

SomeString="snakecase_looks_very_bad"
camelCase=$(snakecase_to_camelCase "$SomeString")

TyeolRik

function camelcase_to_snakecase() {
    local ret
    ret=$(echo "$1" | sed -r 's/([A-Z])/_\L\1/g' | sed 's/^_//')
    echo "$ret"
}

SomeString="helloWorldMyFriend"
snake_case=$(camelcase_to_snakecase "${SomeString}")
echo $snake_case

TyeolRik

#!/bin/bash

function all_uppercase() {
    local ret=${1^^}  # Make input parameter Upper case. Should be declared in local variable.
    echo "$ret" # This is like return.
}

SomeString="HelloWorld"
UpperCase=$(all_uppercase "${SomeString}")
echo $UpperCase

TyeolRik

CREATE TYPE SUBUSER AS OBJECT (
    ID VARCHAR2(200),
    PERMISSIONS VARCHAR2(12)
);

CREATE TYPE SUBUSERS AS VARRAY(1000) OF SUBUSER; -- Nested Table type.

CREATE TABLE USER (
    UID VARCHAR2(50),
    SUBUSERS_COLUMN SUBUSERS -- An Instance of Nested Table

TyeolRik

#!/bin/bash
###########################
# Information
# Host 1 (node1): 172.22.4.101 - admin
# host 2 (node2): 172.22.4.102
# host 3 (node3): 172.22.4.103
# host 4 (node4): 172.22.4.104
# host 5 (node5): 172.22.4.105
###########################