Vô Ngã: February 2018

2/28/18

HTTP endpoint to shut down a spring boot

Maven quick example for maven user to configure HTTP endpoint to shut down a spring boot web app using spring-boot-starter-actuator so that you can copy and paste:

1. Maven pom.xml:

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-actuator</artifactId>
</dependency>

2. application.properties:

#NEED auth  protected 
endpoints.shutdown.sensitive=true

#Enable shutdown endpoint
endpoints.shutdown.enabled=true

All endpoints are listed here:

3.Send a post method to shutdown the app:

curl -X POST localhost:port/shutdown

Security Note:

if you need the shutdown method auth protected, you may also need

<dependency>
  <groupId>org.springframework.boot</groupId>
  <artifactId>spring-boot-starter-security</artifactId>
</dependency>

configure details:

management.security.enabled=true
security.user.name=admin
security.user.password=secret
management.security.roles=SUPERUSER

[Evolution] Error resolving 'outlook.office365.com': Name or service not known

Check below config to fix this bug:

$ cat /etc/resolv.conf
nameserver 127.0.1.1
multi on
order hosts,bind

$ cat /etc/nsswitch.conf
passwd: compat
group: compat
shadow: compat
gshadow: files

hosts: files dns
networks: files

protocols: db files
services: db files
ethers: db files
rpc: db files

netgroup: nis

2/26/18

HP EliteBook 840 G4

System:    Host: dqvnHP Kernel: 4.13.0-32-generic x86_64 (64 bit gcc: 5.4.0)
           Desktop: Cinnamon 3.6.7 (Gtk 3.18.9-1ubuntu3.3) dm: lightdm Distro: Linux Mint 18.3 Sylvia
Machine:   System: HP (portable) product: HP EliteBook 840 G4 Chassis: type: 10
           Mobo: HP model: 828C v: KBC Version 45.3C Bios: HP v: P78 Ver. 01.08 date: 10/17/2017
CPU:       Dual core Intel Core i7-7500U (-HT-MCP-) cache: 4096 KB
           flags: (lm nx sse sse2 sse3 sse4_1 sse4_2 ssse3 vmx) bmips: 11616
           clock speeds: min/max: 400/3500 MHz 1: 2900 MHz 2: 2900 MHz 3: 2900 MHz 4: 2900 MHz
Graphics:  Card: Intel Device 5916 bus-ID: 00:02.0 chip-ID: 8086:5916
           Display Server: X.Org 1.18.4 drivers: intel (unloaded: fbdev,vesa)
           Resolution: 1920x1080@60.01hz, 1920x1080@60.00hz
           GLX Renderer: Mesa DRI Intel HD Graphics 620 (Kaby Lake GT2)
           GLX Version: 3.0 Mesa 17.2.8 Direct Rendering: Yes
Audio:     Card Intel Device 9d71 driver: snd_hda_intel bus-ID: 00:1f.3 chip-ID: 8086:9d71
           Sound: Advanced Linux Sound Architecture v: k4.13.0-32-generic
Network:   Card-1: Intel Ethernet Connection (4) I219-V
           driver: e1000e v: 3.2.6-k bus-ID: 00:1f.6 chip-ID: 8086:15d8
           IF: enp0s31f6 state: up speed: 1000 Mbps duplex: full mac: 
           Card-2: Intel Device 24fd driver: iwlwifi bus-ID: 02:00.0 chip-ID: 8086:24fd
           IF: wlp2s0 state: up speed: N/A duplex: N/A mac: 
Drives:    HDD Total Size: NA (-) ID-1: /dev/nvme0n1 model: N/A size: 256.1GB serial: N/A
Partition: ID-1: / size: 92G used: 35G (40%) fs: ext4 dev: /dev/nvme0n1p2
           ID-2: swap-1 size: 16.00GB used: 0.00GB (0%) fs: swap dev: /dev/dm-0
RAID:      System: supported: N/A
           No RAID devices: /proc/mdstat, md_mod kernel module present
           Unused Devices: none
Sensors:   System Temperatures: cpu: 39.0C mobo: 0.0C
           Fan Speeds (in rpm): cpu: N/A
Repos:     Active apt sources in file: /etc/apt/sources.list.d/chrome.list
           deb [arch=amd64] http: //dl.google.com/linux/chrome/deb/ stable main
           Active apt sources in file: /etc/apt/sources.list.d/official-package-repositories.list
           deb http: //packages.linuxmint.com sylvia main upstream import backport
           deb http: //archive.ubuntu.com/ubuntu xenial main restricted universe multiverse
           deb http: //archive.ubuntu.com/ubuntu xenial-updates main restricted universe multiverse
           deb http: //archive.ubuntu.com/ubuntu xenial-backports main restricted universe multiverse
           deb http: //security.ubuntu.com/ubuntu/ xenial-security main restricted universe multiverse
           deb http: //archive.canonical.com/ubuntu/ xenial partner
           Active apt sources in file: /etc/apt/sources.list.d/peterlevi-ppa-xenial.list
           deb http: //ppa.launchpad.net/peterlevi/ppa/ubuntu xenial main
           deb-src http: //ppa.launchpad.net/peterlevi/ppa/ubuntu xenial main
           Active apt sources in file: /etc/apt/sources.list.d/skype-stable.list
           deb [arch=amd64] https: //repo.skype.com/deb stable main
           Active apt sources in file: /etc/apt/sources.list.d/stebbins-handbrake-git-snapshots-xenial.list
           deb http: //ppa.launchpad.net/stebbins/handbrake-git-snapshots/ubuntu xenial main
           deb-src http: //ppa.launchpad.net/stebbins/handbrake-git-snapshots/ubuntu xenial main
           Active apt sources in file: /etc/apt/sources.list.d/webupd8team-java-xenial.list
           deb http: //ppa.launchpad.net/webupd8team/java/ubuntu xenial main
           deb-src http: //ppa.launchpad.net/webupd8team/java/ubuntu xenial main
Info:      Processes: 261 Uptime: 4 days Memory: 7697.3/15920.6MB
           Init: systemd v: 229 runlevel: 5 default: 2 Gcc sys: 5.4.0
           Client: Unknown python2.7 client inxi: 2.2.35

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