build-ui won't run on 1GB of RAM

[forkwhilefork]

Bug Description

I don't know what's going on, because I got this to work yesterday, but build-ui will not run successfully.

Expected behavior

hyperglass build-ui will complete without errors.

Steps to Reproduce

I tried this once and couldn't get it to work, but yesterday it worked when I did the same thing on another (I think identical) VM at work, so I deleted this VM and started over. Here are the exact steps I took after installation, pulled from my .bash_history and session logs:
from a fresh install of Centos 7 (minimal ISO):

1. configure firewall
2. yum update -y
3. install some things I like to have (nano screen whois traceroute wget open-vm-tools)
4. yum install centos-release-scl python3-devel rh-python36
5. python3 --version (shows python 3.6.8)
6. wget https://rpm.nodesource.com/setup_14.x (executing from curl is never a good idea)
7. sh setup_14.x
8. curl -sL https://dl.yarnpkg.com/rpm/yarn.repo -o /etc/yum.repos.d/yarn.repo
9. yum -y install epel-release
10. yum update
11. yum -y install gcc-c++ make nodejs yarn redis
12. pip3 install hyperglass (no errors)
13. useradd -r hyperglass (I will use this user to run hyperglass once all the setup is done - for now it's not used though)
14. hyperglass setup
15. cd /etc/hyperglass/
16. edit config files (see below for their contents)
17. hyperglass build-ui (1) (see logs below)
18. reboot (I remembered I never rebooted after my yum update so I was still using the old kernel)
19. hyperglass build-ui (2)
20. cd /usr/local/lib/python3.6/site-packages/hyperglass/ui (since there was no error message - maybe if I run the build more directly I'll get more info?)
    20a. top (3) (output taken while running 21)
21. npm run-script build (4)
22. cat /root/.npm/_logs/2020-07-18T04_38_24_259Z-debug.log (5)
23. setenforce 0 (sometimes selinux causes issues)
24. npm run-script build (6) (I got a different result here, but I'm pretty sure I got this the first time around while selinux was enabled, so I think that's a coincidence. I'm including it anyway because it has a bit more info.)
25. give up and type up this bug report

I didn't feel like doing it again but the first time around I also tried running next build by itself and it also got killed due to OOM.

Local Configurations

devices.yaml

---
# Credentials
credentials:
  - credential: &credential1
      username: *******
      password: *******

# Networks
networks:
  - network: &net_primary
      name: primary
      display_name: Main Network

# VRFs
vrfs:
  - &vrf_default
    name: default
    display_name: Global
    ipv4:
      access_list: &vrf_default_ipv4_acl
        - network: 10.0.0.0/8
          action: deny
        - network: 192.168.0.0/16
          action: deny
        - network: 172.16.0.0/12
          action: deny
        - network: 0.0.0.0/0
          action: permit
          ge: 8
          le: 24
    ipv6:
      access_list: &vrf_default_ipv6_acl
        - network: ::/0
          action: permit
          ge: 32
          le: 64

# Routers
routers:
  - name: core2_iad4
    address: 10.x.x.x
    network: *net_primary
    credential: *credential1
    display_name: core2.iad4
    port: 18443
    nos: bird
    vrfs:
      - <<: *vrf_default
        ipv4:
          source_address: x.x.x.x
          access_list: *vrf_default_ipv4_acl
        ipv6:
          source_address: x:x:x:x::x
          access_list: *vrf_default_ipv6_acl
    proxy: null

hyperglass.yaml

debug: true
developer_mode: true
primary_asn: "25682"
org_name: "Fork Systems"
site_title: "Fork Systems looking glass"
site_description: "a looking glass for AS25682"
request_timeout: 30
#listen_address: "127.0.0.1"
listen_address: "0.0.0.0"
listen_port: 8080
queries:
  bgp_route:
    enable: true
  bgp_community:
    enable: false
  bgp_aspath:
    enable: false
  ping:
    enable: true
  traceroute:
    enable: true

Logs

1:

# hyperglass build-ui
[INFO] 20200718 00:08:38 | hyperglass.configuration:43 | <module> ? Configuration directory: /etc/hyperglass
[DEBUG] 20200718 00:08:38 | hyperglass.log:46 | set_log_level ? Debugging enabled
[DEBUG] 20200718 00:08:38 | hyperglass.configuration:165 | <module> ? Unvalidated configuration from /etc/hyperglass/hyperglass.yaml: <snip>
[DEBUG] 20200718 00:08:38 | hyperglass.configuration:174 | <module> ? Unvalidated commands from /etc/hyperglass/commands.yaml: {}
[DEBUG] 20200718 00:08:38 | hyperglass.configuration:181 | <module> ? Unvalidated devices from /etc/hyperglass/devices.yaml: <snip>
[DEBUG] 20200718 00:08:39 | hyperglass.log:83 | enable_file_logging ? Logging to file enabled
Starting new UI build...
[DEBUG] 20200718 00:08:39 | hyperglass.util:414 | read_package_json ? package.json:
{'name': 'ui', 'version': '1.0.0', 'description': 'UI for hyperglass, the modern network looking glass', 'author': 'Matt Love', 'license': 'BSD-3-Clause-Clear', 'private': False, 'scripts': {'dev': 'node nextdev', 'build': 'next build && next export -o ../hyperglass/static/ui', 'start': 'next start', 'clean': 'rimraf --no-glob ./.next ./out', 'check:es:build': "es-check es5 './.next/static/**/*.js' -v", 'check:es:export': "es-check es5 './out/**/*.js' -v"}, 'browserslist': '> 0.25%, not dead', 'dependencies': {'@chakra-ui/core': '^0.8', '@emotion/core': '^10.0.28', '@emotion/styled': '^10.0.27', '@styled-system/should-forward-prop': '^5.1.5', 'axios': '^0.19.2', 'axios-hooks': '^1.9.0', 'chroma-js': '^2.1.0', 'dayjs': '^1.8.25', 'emotion-theming': '^10.0.27', 'favicons': '^6.1.0', 'framer-motion': '^1.10.0', 'html-to-react': '^1.4.3', 'lodash': '^4.17.15', 'next': '^9.4', 'react': '^16.13.1', 'react-countdown': '^2.2.1', 'react-dom': '^16.13.1', 'react-hook-form': '^5.7', 'react-icons': '^3.9.0', 'react-markdown': '^4.3.1', 'react-select': '^3.0.8', 'react-string-replace': '^0.4.4', 'react-table': '^7.0.4', 'string-format': '^2.0.0', 'styled-system': '^5.1.5', 'tempy': '^0.5.0', 'use-media': '^1.4.0', 'yup': '^0.28.3'}, 'devDependencies': {'@typescript-eslint/eslint-plugin': '^2.24.0', '@typescript-eslint/parser': '^2.24.0', 'babel-eslint': '^10.1.0', 'es-check': '^5.1.0', 'eslint': '^6.8.0', 'eslint-config-airbnb': '^18.1.0', 'eslint-config-prettier': '^6.10.0', 'eslint-config-react-app': '^5.2.0', 'eslint-import-resolver-webpack': '^0.12.1', 'eslint-plugin-flowtype': '^4.6.0', 'eslint-plugin-import': '^2.20.1', 'eslint-plugin-jsx-a11y': '^6.2.3', 'eslint-plugin-prettier': '^3.1.2', 'eslint-plugin-react': '^7.19.0', 'eslint-plugin-react-hooks': '^2.3.0', 'express': '^4.17.1', 'http-proxy-middleware': '0.20.0', 'prettier': '^1.19.1'}, 'eslintConfig': {'parser': 'babel-eslint', 'rules': {'max-len': ['error', 100], 'react/prop-types': 0, 'react/jsx-filename-extension': 0, 'react/jsx-props-no-spreading': 0, 'no-bitwise': 0, 'object-shorthand': 0, 'no-plusplus': 0, 'no-param-reassign': 0, 'no-unused-expressions': 0, 'no-nested-ternary': 0, 'no-underscore-dangle': 0, 'camelcase': 0}, 'extends': ['airbnb', 'prettier', 'prettier/react'], 'env': {'browser': True}, 'settings': {'import/core-modules': ['styled-jsx/css'], 'import/resolver': {'webpack': {'config': 'webpack.config.js'}}}}}
[DEBUG] 20200718 00:08:39 | hyperglass.util:622 | build_frontend ? node_modules has not been initialized. Starting initialization...
? Error building UI:

2:

[INFO] 20200718 00:12:21 | hyperglass.configuration:43 | <module> ? Configuration directory: /etc/hy perglass
[DEBUG] 20200718 00:12:21 | hyperglass.log:46 | set_log_level ? Debugging enabled
[DEBUG] 20200718 00:12:21 | hyperglass.configuration:165 | <module> ? Unvalidated configuration from  /etc/hyperglass/hyperglass.yaml: <snip>
[DEBUG] 20200718 00:12:21 | hyperglass.configuration:174 | <module> ? Unvalidated commands from /etc /hyperglass/commands.yaml: {}
[DEBUG] 20200718 00:12:21 | hyperglass.configuration:181 | <module> ? Unvalidated devices from /etc/ hyperglass/devices.yaml: <snip>
[DEBUG] 20200718 00:12:21 | hyperglass.log:83 | enable_file_logging ? Logging to file enabled
Starting new UI build...
[DEBUG] 20200718 00:12:21 | hyperglass.util:414 | read_package_json ? package.json:
{'name': 'ui', 'version': '1.0.0', 'description': 'UI for hyperglass, the modern network looking gla ss', 'author': 'Matt Love', 'license': 'BSD-3-Clause-Clear', 'private': False, 'scripts': {'dev': 'n ode nextdev', 'build': 'next build && next export -o ../hyperglass/static/ui', 'start': 'next start' , 'clean': 'rimraf --no-glob ./.next ./out', 'check:es:build': "es-check es5 './.next/static/**/*.js ' -v", 'check:es:export': "es-check es5 './out/**/*.js' -v"}, 'browserslist': '> 0.25%, not dead', ' dependencies': {'@chakra-ui/core': '^0.8', '@emotion/core': '^10.0.28', '@emotion/styled': '^10.0.27 ', '@styled-system/should-forward-prop': '^5.1.5', 'axios': '^0.19.2', 'axios-hooks': '^1.9.0', 'chr oma-js': '^2.1.0', 'dayjs': '^1.8.25', 'emotion-theming': '^10.0.27', 'favicons': '^6.1.0', 'framer- motion': '^1.10.0', 'html-to-react': '^1.4.3', 'lodash': '^4.17.15', 'next': '^9.4', 'react': '^16.1 3.1', 'react-countdown': '^2.2.1', 'react-dom': '^16.13.1', 'react-hook-form': '^5.7', 'react-icons' : '^3.9.0', 'react-markdown': '^4.3.1', 'react-select': '^3.0.8', 'react-string-replace': '^0.4.4',  'react-table': '^7.0.4', 'string-format': '^2.0.0', 'styled-system': '^5.1.5', 'tempy': '^0.5.0', 'u se-media': '^1.4.0', 'yup': '^0.28.3'}, 'devDependencies': {'@typescript-eslint/eslint-plugin': '^2. 24.0', '@typescript-eslint/parser': '^2.24.0', 'babel-eslint': '^10.1.0', 'es-check': '^5.1.0', 'esl int': '^6.8.0', 'eslint-config-airbnb': '^18.1.0', 'eslint-config-prettier': '^6.10.0', 'eslint-conf ig-react-app': '^5.2.0', 'eslint-import-resolver-webpack': '^0.12.1', 'eslint-plugin-flowtype': '^4. 6.0', 'eslint-plugin-import': '^2.20.1', 'eslint-plugin-jsx-a11y': '^6.2.3', 'eslint-plugin-prettier ': '^3.1.2', 'eslint-plugin-react': '^7.19.0', 'eslint-plugin-react-hooks': '^2.3.0', 'express': '^4 .17.1', 'http-proxy-middleware': '0.20.0', 'prettier': '^1.19.1'}, 'eslintConfig': {'parser': 'babel -eslint', 'rules': {'max-len': ['error', 100], 'react/prop-types': 0, 'react/jsx-filename-extension' : 0, 'react/jsx-props-no-spreading': 0, 'no-bitwise': 0, 'object-shorthand': 0, 'no-plusplus': 0, 'n o-param-reassign': 0, 'no-unused-expressions': 0, 'no-nested-ternary': 0, 'no-underscore-dangle': 0,  'camelcase': 0}, 'extends': ['airbnb', 'prettier', 'prettier/react'], 'env': {'browser': True}, 'se ttings': {'import/core-modules': ['styled-jsx/css'], 'import/resolver': {'webpack': {'config': 'webp ack.config.js'}}}}}
[DEBUG] 20200718 00:12:21 | hyperglass.util:620 | build_frontend ? node_modules is already initializ ed
[INFO] 20200718 00:12:21 | hyperglass.util:654 | build_frontend ? Starting UI build...
[DEBUG] 20200718 00:12:21 | hyperglass.util:656 | build_frontend ? Created temporary UI config file:  '/tmp/hyperglass_gkook_u2.json' for build b91c039a4562644192a196189a87d29127b1a6577cb0dd5b2c9efc208 2c6e723
? Error building UI:
Messages:
Creating an optimized production build...
Attention: Next.js now collects completely anonymous telemetry regarding usage.
This information is used to shape Next.js' roadmap and prioritize features.
You can learn more, including how to opt-out if you'd not like to participate in this anonymous prog ram, by visiting the following URL:
https://nextjs.org/telemetry
Errors:

3:

  PID USER      PR  NI    VIRT    RES    SHR S  %CPU %MEM     TIME+ COMMAND
   65 root      20   0       0      0      0 S 100.0  0.0   0:40.07 kswapd0
 2268 root      20   0 5082672 801044      0 D  40.3 79.0   1:15.85 node

4:

# npm run-script build

> ui@1.0.0 build /usr/local/lib/python3.6/site-packages/hyperglass/ui
> next build && next export -o ../hyperglass/static/ui

Creating an optimized production build ..sh: line 1:  2268 Killed                  next build
npm ERR! code ELIFECYCLE
npm ERR! errno 137
npm ERR! ui@1.0.0 build: `next build && next export -o ../hyperglass/static/ui`
npm ERR! Exit status 137
npm ERR!
npm ERR! Failed at the ui@1.0.0 build script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.

npm ERR! A complete log of this run can be found in:
npm ERR!     /root/.npm/_logs/2020-07-18T04_38_24_259Z-debug.log

5:

# cat /root/.npm/_logs/2020-07-18T04_38_24_259Z-debug.log
0 info it worked if it ends with ok
1 verbose cli [ '/usr/bin/node', '/usr/bin/npm', 'run-script', 'build' ]
2 info using npm@6.14.5
3 info using node@v14.5.0
4 verbose run-script [ 'prebuild', 'build', 'postbuild' ]
5 info lifecycle ui@1.0.0~prebuild: ui@1.0.0
6 info lifecycle ui@1.0.0~build: ui@1.0.0
7 verbose lifecycle ui@1.0.0~build: unsafe-perm in lifecycle true
8 verbose lifecycle ui@1.0.0~build: PATH: /usr/lib/node_modules/npm/node_modules/npm-lifecycle/node-gyp-bin:/usr/local/lib/python3.6/site-packages/hyperglass/ui/node_modules/.bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/root/bin
9 verbose lifecycle ui@1.0.0~build: CWD: /usr/local/lib/python3.6/site-packages/hyperglass/ui
10 silly lifecycle ui@1.0.0~build: Args: [ '-c', 'next build && next export -o ../hyperglass/static/ui' ]
11 silly lifecycle ui@1.0.0~build: Returned: code: 137  signal: null
12 info lifecycle ui@1.0.0~build: Failed to exec build script
13 verbose stack Error: ui@1.0.0 build: `next build && next export -o ../hyperglass/static/ui`
13 verbose stack Exit status 137
13 verbose stack     at EventEmitter.<anonymous> (/usr/lib/node_modules/npm/node_modules/npm-lifecycle/index.js:332:16)
13 verbose stack     at EventEmitter.emit (events.js:314:20)
13 verbose stack     at ChildProcess.<anonymous> (/usr/lib/node_modules/npm/node_modules/npm-lifecycle/lib/spawn.js:55:14)
13 verbose stack     at ChildProcess.emit (events.js:314:20)
13 verbose stack     at maybeClose (internal/child_process.js:1051:16)
13 verbose stack     at Process.ChildProcess._handle.onexit (internal/child_process.js:287:5)
14 verbose pkgid ui@1.0.0
15 verbose cwd /usr/local/lib/python3.6/site-packages/hyperglass/ui
16 verbose Linux 3.10.0-1127.13.1.el7.x86_64
17 verbose argv "/usr/bin/node" "/usr/bin/npm" "run-script" "build"
18 verbose node v14.5.0
19 verbose npm  v6.14.5
20 error code ELIFECYCLE
21 error errno 137
22 error ui@1.0.0 build: `next build && next export -o ../hyperglass/static/ui`
22 error Exit status 137
23 error Failed at the ui@1.0.0 build script.
23 error This is probably not a problem with npm. There is likely additional logging output above.
24 verbose exit [ 137, true ]

6:

# npm run-script build

> ui@1.0.0 build /usr/local/lib/python3.6/site-packages/hyperglass/ui
> next build && next export -o ../hyperglass/static/ui

ENOENT: no such file or directory, open '/etc/hyperglass/static/images/favicons/favicon-16x16.png'
ENOENT: no such file or directory, open '/etc/hyperglass/static/images/favicons/favicon-32x32.png'
ENOENT: no such file or directory, open '/etc/hyperglass/static/images/favicons/android-chrome-36x36.png'
ENOENT: no such file or directory, open '/etc/hyperglass/static/images/favicons/android-chrome-48x48.png'
ENOENT: no such file or directory, open '/etc/hyperglass/static/images/favicons/android-chrome-72x72.png'
ENOENT: no such file or directory, open '/etc/hyperglass/static/images/favicons/android-chrome-96x96.png'
ENOENT: no such file or directory, open '/etc/hyperglass/static/images/favicons/android-chrome-144x144.png'
ENOENT: no such file or directory, open '/etc/hyperglass/static/images/favicons/android-chrome-192x192.png'
ENOENT: no such file or directory, open '/etc/hyperglass/static/images/favicons/android-chrome-256x256.png'
ENOENT: no such file or directory, open '/etc/hyperglass/static/images/favicons/android-chrome-384x384.png'
ENOENT: no such file or directory, open '/etc/hyperglass/static/images/favicons/android-chrome-512x512.png'
ENOENT: no such file or directory, open '/etc/hyperglass/static/images/favicons/apple-touch-icon-57x57.png'
ENOENT: no such file or directory, open '/etc/hyperglass/static/images/favicons/apple-touch-icon-60x60.png'
ENOENT: no such file or directory, open '/etc/hyperglass/static/images/favicons/apple-touch-icon-72x72.png'
ENOENT: no such file or directory, open '/etc/hyperglass/static/images/favicons/apple-touch-icon-76x76.png'
ENOENT: no such file or directory, open '/etc/hyperglass/static/images/favicons/apple-touch-icon-114x114.png'
ENOENT: no such file or directory, open '/etc/hyperglass/static/images/favicons/apple-touch-icon-120x120.png'
ENOENT: no such file or directory, open '/etc/hyperglass/static/images/favicons/apple-touch-icon-144x144.png'
ENOENT: no such file or directory, open '/etc/hyperglass/static/images/favicons/apple-touch-icon-152x152.png'
ENOENT: no such file or directory, open '/etc/hyperglass/static/images/favicons/apple-touch-icon-167x167.png'
ENOENT: no such file or directory, open '/etc/hyperglass/static/images/favicons/apple-touch-icon-180x180.png'
ENOENT: no such file or directory, open '/etc/hyperglass/static/images/favicons/apple-touch-icon-1024x1024.png'
ENOENT: no such file or directory, open '/etc/hyperglass/static/images/favicons/apple-touch-icon.png'
ENOENT: no such file or directory, open '/etc/hyperglass/static/images/favicons/apple-touch-icon-precomposed.png'
ENOENT: no such file or directory, open '/etc/hyperglass/static/images/favicons/apple-touch-startup-image-640x1136.png'
ENOENT: no such file or directory, open '/etc/hyperglass/static/images/favicons/apple-touch-startup-image-750x1334.png'
ENOENT: no such file or directory, open '/etc/hyperglass/static/images/favicons/apple-touch-startup-image-828x1792.png'
ENOENT: no such file or directory, open '/etc/hyperglass/static/images/favicons/apple-touch-startup-image-1125x2436.png'
ENOENT: no such file or directory, open '/etc/hyperglass/static/images/favicons/apple-touch-startup-image-1242x2208.png'
ENOENT: no such file or directory, open '/etc/hyperglass/static/images/favicons/apple-touch-startup-image-1242x2688.png'
ENOENT: no such file or directory, open '/etc/hyperglass/static/images/favicons/apple-touch-startup-image-1536x2048.png'
ENOENT: no such file or directory, open '/etc/hyperglass/static/images/favicons/apple-touch-startup-image-1668x2224.png'
ENOENT: no such file or directory, open '/etc/hyperglass/static/images/favicons/apple-touch-startup-image-1668x2388.png'
ENOENT: no such file or directory, open '/etc/hyperglass/static/images/favicons/apple-touch-startup-image-1136x640.png'
ENOENT: no such file or directory, open '/etc/hyperglass/static/images/favicons/apple-touch-startup-image-2048x2732.png'
ENOENT: no such file or directory, open '/etc/hyperglass/static/images/favicons/apple-touch-startup-image-2160x1620.png'
ENOENT: no such file or directory, open '/etc/hyperglass/static/images/favicons/apple-touch-startup-image-1620x2160.png'
ENOENT: no such file or directory, open '/etc/hyperglass/static/images/favicons/apple-touch-startup-image-1334x750.png'
ENOENT: no such file or directory, open '/etc/hyperglass/static/images/favicons/apple-touch-startup-image-1792x828.png'
ENOENT: no such file or directory, open '/etc/hyperglass/static/images/favicons/apple-touch-startup-image-2436x1125.png'
ENOENT: no such file or directory, open '/etc/hyperglass/static/images/favicons/apple-touch-startup-image-2208x1242.png'
ENOENT: no such file or directory, open '/etc/hyperglass/static/images/favicons/apple-touch-startup-image-2688x1242.png'
ENOENT: no such file or directory, open '/etc/hyperglass/static/images/favicons/apple-touch-startup-image-2048x1536.png'
ENOENT: no such file or directory, open '/etc/hyperglass/static/images/favicons/apple-touch-startup-image-2224x1668.png'
ENOENT: no such file or directory, open '/etc/hyperglass/static/images/favicons/apple-touch-startup-image-2388x1668.png'
ENOENT: no such file or directory, open '/etc/hyperglass/static/images/favicons/apple-touch-startup-image-2732x2048.png'
ENOENT: no such file or directory, open '/etc/hyperglass/static/images/favicons/coast-228x228.png'
ENOENT: no such file or directory, open '/etc/hyperglass/static/images/favicons/firefox_app_60x60.png'
ENOENT: no such file or directory, open '/etc/hyperglass/static/images/favicons/firefox_app_128x128.png'
ENOENT: no such file or directory, open '/etc/hyperglass/static/images/favicons/firefox_app_512x512.png'
ENOENT: no such file or directory, open '/etc/hyperglass/static/images/favicons/mstile-70x70.png'
ENOENT: no such file or directory, open '/etc/hyperglass/static/images/favicons/mstile-144x144.png'
ENOENT: no such file or directory, open '/etc/hyperglass/static/images/favicons/mstile-150x150.png'
ENOENT: no such file or directory, open '/etc/hyperglass/static/images/favicons/mstile-310x150.png'
ENOENT: no such file or directory, open '/etc/hyperglass/static/images/favicons/mstile-310x310.png'
ENOENT: no such file or directory, open '/etc/hyperglass/static/images/favicons/yandex-browser-50x50.png'
ENOENT: no such file or directory, open '/etc/hyperglass/static/images/favicons/manifest.json'
ENOENT: no such file or directory, open '/etc/hyperglass/static/images/favicons/manifest.webapp'
ENOENT: no such file or directory, open '/etc/hyperglass/static/images/favicons/browserconfig.xml'
ENOENT: no such file or directory, open '/etc/hyperglass/static/images/favicons/yandex-browser-manifest.json'
ENOENT: no such file or directory, open '/etc/hyperglass/static/images/favicons/favicon-48x48.png'
ENOENT: no such file or directory, open '/etc/hyperglass/static/images/favicons/favicon.ico'
Creating an optimized production build .internal/child_process.js:406
    throw errnoException(err, 'spawn');
    ^

Error: spawn ENOMEM
    at ChildProcess.spawn (internal/child_process.js:406:11)
    at spawn (child_process.js:553:9)
    at Object.fork (child_process.js:121:10)
    at ChildProcessWorker.initialize (/usr/local/lib/python3.6/site-packages/hyperglass/ui/node_modules/jest-worker/build/workers/ChildProcessWorker.js:137:44)
    at ChildProcessWorker.onExit (/usr/local/lib/python3.6/site-packages/hyperglass/ui/node_modules/jest-worker/build/workers/ChildProcessWorker.js:263:12)
    at ChildProcess.emit (events.js:314:20)
    at Process.ChildProcess._handle.onexit (internal/child_process.js:276:12) {
  errno: -12,
  code: 'ENOMEM',
  syscall: 'spawn'
}
npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! ui@1.0.0 build: `next build && next export -o ../hyperglass/static/ui`
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the ui@1.0.0 build script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.

npm ERR! A complete log of this run can be found in:
npm ERR!     /root/.npm/_logs/2020-07-18T04_45_49_229Z-debug.log

Possible Solution

I have absolutely no idea.

Environment

Server

• OS: Centos 7
• Python Version: 3.6.8
• hyperglass Version: 1.0.0-beta.51
  this server has 1G of RAM and 1G of swap so it should definitely be able to handle this build.

[forkwhilefork]

Per our conversation in telegram, this is because I legitimately need more than 1GB of ram in order to generate the images. As you mentioned in #60, the real solution to this is to write a library in python to generate the images and use that instead of the problematic javascript one, which you said you're working on. However, in the meantime, it might be good to add a note to the system requirements explaining that more memory is needed at build-time.