I am running a node:latest container, with the local disk mapped into it, where my project-specific files reside. I want the server to auto-detect changes in these files as I edit them from outside the container - this is powered by the nodemon module.
This used to work fine the last time I did it, about 2 years ago. I took that old project, updated it (as was apparently necessary to get it to even run now, on top of resolving critical security vulnerabilities), but it claims it can't find the nodemon module when running node from the command-line (either initiated by the container or manually). If I start an interactive node session, after shelling into the container, it can find the module(s).
The modules are freshly installed when the container starts up. At least for the time being, this will change once the issues are sorted out.
The short version:
# node nodemon version
internal/modules/cjs/loader.js:1032
throw err;
^
Error: Cannot find module '/app/nodemon'
at Function.Module._resolveFilename (internal/modules/cjs/loader.js:1029:15)
at Function.Module._load (internal/modules/cjs/loader.js:898:27)
at Function.executeUserEntryPoint [as runMain] (internal/modules/run_main.js:71:12)
at internal/main/run_main_module.js:17:47 {
code: 'MODULE_NOT_FOUND',
requireStack: []
}
# node
Welcome to Node.js v14.4.0.
Type ".help" for more information.
> nm = require("nodemon")
[Function: nodemon] {
restart: [Function (anonymous)],
on: [Function (anonymous)],
addListener: [Function (anonymous)],
once: [Function (anonymous)],
emit: [Function (anonymous)],
removeAllListeners: [Function (anonymous)],
reset: [Function (anonymous)],
config: {
run: false,
system: { cwd: '/app' },
required: true,
dirs: [],
timeout: 1000,
options: {},
load: [Function (anonymous)],
reset: [Function: reset]
}
}
> .exit
The long version, with sanity checks... All commands were run from inside the container, in the local directory that has been mounted via the docker-compose.yml:
# pwd
/app
# ls
bin data node_modules package-lock.json package.json public routes server.js startScript.sh views
# cat package.json
{
"name": "app",
"version": "1.0.0",
"description": "",
"main": "app.js",
"scripts": {
"test": "echo \"Error: no test specified\" && exit 1",
"start": "node server.js"
},
"keywords": [],
"author": "",
"license": "ISC",
"dependencies": {
"body-parser": "^1.20.0",
"cookie-parser": "^1.4.6",
"debug": "^4.3.4",
"express": "^4.18.1",
"http-errors": "^2.0.0",
"jQuery": "^1.7.4",
"morgan": "^1.10.0",
"multer": "^1.4.5-lts.1",
"nodemon": "^2.0.16",
"pug": "^3.0.2"
}
}
# export NODE_PATH=/app/node_modules
# echo $NODE_PATH
/app/node_modules
# ls $NODE_PATH
@babel binary-extensions color-convert depd function-bind imurmurhash is-regex mime-db on-headers pug-filters registry-url strip-json-comments url-parse-lax
@sindresorhus body-parser color-name destroy get-intrinsic inherits is-typedarray mime-types once pug-lexer resolve supports-color util-deprecate
@szmarczak boxen concat-map doctypes get-stream ini is-yarn-global mimic-response p-cancelable pug-linker responselike supports-preserve-symlinks-flag utils-merge
abbrev brace-expansion concat-stream dot-prop glob-parent ipaddr.js isarray minimatch package-json pug-load safe-buffer to-fast-properties vary
accepts braces configstore duplexer3 global-dirs is-binary-path jQuery minimist parseurl pug-parser safer-buffer to-readable-stream void-elements
acorn buffer-from constantinople ee-first got is-ci js-stringify mkdirp path-parse pug-runtime semver to-regex-range widest-line
ansi-align busboy content-disposition emoji-regex graceful-fs is-core-module json-buffer morgan path-to-regexp pug-strip-comments semver-diff toidentifier with
ansi-regex bytes content-type encodeurl has is-expression jstransformer ms picomatch pug-walk send token-stream wrap-ansi
ansi-styles cacheable-request cookie end-of-stream has-flag is-extglob keyv multer prepend-http pump serve-static touch wrappy
anymatch call-bind cookie-parser escape-goat has-symbols is-fullwidth-code-point latest-version negotiator process-nextick-args pupa setprototypeof type-fest write-file-atomic
append-field camelcase cookie-signature escape-html has-tostringtag is-glob lowercase-keys nodemon promise qs side-channel type-is xdg-basedir
array-flatten chalk core-util-is etag has-yarn is-installed-globally lru-cache nopt proxy-addr range-parser signal-exit typedarray xtend
asap character-parser crypto-random-string express http-cache-semantics is-npm make-dir normalize-path pstree.remy raw-body statuses typedarray-to-buffer yallist
assert-never chokidar debug fill-range http-errors is-number media-typer normalize-url pug rc streamsearch undefsafe
babel-walk ci-info decompress-response finalhandler iconv-lite is-obj merge-descriptors object-assign pug-attrs readable-stream string-width unique-string
balanced-match cli-boxes deep-extend forwarded ignore-by-default is-path-inside methods object-inspect pug-code-gen readdirp string_decoder unpipe
basic-auth clone-response defer-to-connect fresh import-lazy is-promise mime on-finished pug-error registry-auth-token strip-ansi update-notifier
# npm view nodemon
[email protected] | MIT | deps: 10 | versions: 237
Simple monitor script for use during development of a Node.js app.
https://nodemon.io
keywords: cli, monitor, monitor, development, restart, autoload, reload, terminal
bin: nodemon
dist
.tarball: https://registry.npmjs.org/nodemon/-/nodemon-2.0.16.tgz
.shasum: d71b31bfdb226c25de34afea53486c8ef225fdef
.integrity: sha512-zsrcaOfTWRuUzBn3P44RDliLlp263Z/76FPoHFr3cFFkOz0lTPAcIw8dCzfdVIx/t3AtDYCZRCDkoCojJqaG3w==
.unpackedSize: 196.5 kB
dependencies:
chokidar: ^3.5.2 debug: ^3.2.7 ignore-by-default: ^1.0.1 minimatch: ^3.0.4 pstree.remy: ^1.1.8 semver: ^5.7.1 supports-color: ^5.5.0 touch: ^3.1.0 undefsafe: ^2.0.5 update-notifier: ^5.1.0
maintainers:
- remy <[email protected]>
dist-tags:
debug-1268: 1.15.2-alpha.2 debug: 2.0.14-alpha.1 latest: 2.0.16
published a month ago by remy <[email protected]>
# node nodemon version
internal/modules/cjs/loader.js:1032
throw err;
^
Error: Cannot find module '/app/nodemon'
at Function.Module._resolveFilename (internal/modules/cjs/loader.js:1029:15)
at Function.Module._load (internal/modules/cjs/loader.js:898:27)
at Function.executeUserEntryPoint [as runMain] (internal/modules/run_main.js:71:12)
at internal/main/run_main_module.js:17:47 {
code: 'MODULE_NOT_FOUND',
requireStack: []
}
# node
Welcome to Node.js v14.4.0.
Type ".help" for more information.
> nm = require("nodemon")
[Function: nodemon] {
restart: [Function (anonymous)],
on: [Function (anonymous)],
addListener: [Function (anonymous)],
once: [Function (anonymous)],
emit: [Function (anonymous)],
removeAllListeners: [Function (anonymous)],
reset: [Function (anonymous)],
config: {
run: false,
system: { cwd: '/app' },
required: true,
dirs: [],
timeout: 1000,
options: {},
load: [Function (anonymous)],
reset: [Function: reset]
}
}
> .exit
# export NODE_PATH=/app
# echo $NODE_PATH
/app
# node nodemon
internal/modules/cjs/loader.js:1032
throw err;
^
Error: Cannot find module '/app/nodemon'
at Function.Module._resolveFilename (internal/modules/cjs/loader.js:1029:15)
at Function.Module._load (internal/modules/cjs/loader.js:898:27)
at Function.executeUserEntryPoint [as runMain] (internal/modules/run_main.js:71:12)
at internal/main/run_main_module.js:17:47 {
code: 'MODULE_NOT_FOUND',
requireStack: []
}
#
Because I expect someone will ask, despite the seeming irrelevance, here is the script that installs the modules:
#!/bin/sh
rm /app/package.json
rm /app/package-lock.json
rm -rf /app/node_modules
npm init -y
npm install express
npm install http-errors
npm install pug
npm install morgan
npm install cookie-parser
npm install debug
npm install jQuery
npm install body-parser
npm install multer
npm install nodemon
npm audit
npm audit fix
That script is run on a fresh node:latest container, with no other quirks beyond mapping in the directory shown above, so this should be reproducible. It ideally won't remove the node_modules and whatnot, to speed start-up, but I have it doing it in this case, just to be sure everything is clean.
And, again, in case someone asks, here's the docker-compose.yml:
#redis:
# image: redis
# volumes:
# - ./webapp/data/redis:/data
#mysql:
# image: mysql:latest
# environment:
# MYSQL_ROOT_PASSWORD: StackOverflowsdfj87ey2,238n
# MYSQL_DATABASE: StackOverflowDB
# MYSQL_USER: StackOverflow
# MYSQL_PASSWORD: StackOverflowmcxhdie73.6xm
# volumes:
# - ./webapp/data/mysql:/var/lib/mysql
application:
image: node:latest
working_dir: /app
command: /app/startScript.sh
volumes:
- ./webapp:/app
ports:
- 80:3000
# links:
# - redis
# - mysql
That's about all I can think of that might be relevant here... Like I said, this used to work reliably - using the exact same docker-compose.yml and start-up script, with full database support.
CodePudding user response：
Nodemon isn't a module. Normally it's installed globally and used as a command from the command line.
Since it isn't installed globally, a way to run it is to start it like this
./node_modules/nodemon/bin/nodemon.js -h