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Link to a service which isn't a Docker container #1110

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Closed
Link to a service which isn't a Docker container#1110

Description

@aanand
aanand
opened on Mar 13, 2015

In production, your database might not be running inside a Docker container, but it's useful to be able to represent it logically inside Compose as a service.

Compose should have a concept of "external" services, which specify a host/port and can be "linked" from other services. For example:

db:
type: externalhost: 1.2.3.4port: 5432environment:
POSTGRES_USER: produserPOSTGRES_PASSWORD: prodpass

This results in services which link to this service being furnished with hostnames and environment variables in exactly the same way as if they were linked to a Docker container:

$ docker-compose run web cat /etc/hosts
127.0.0.1 localhost
1.2.3.4 db
$ docker-compose run web env
DB_PORT=tcp://1.2.3.4:5432
DB_PORT_5432_TCP=tcp://1.2.3.4:5432
DB_PORT_5432_TCP_ADDR=1.2.3.4
DB_PORT_5432_TCP_PORT=5432
DB_PORT_5432_TCP_PROTO=tcp
DB_ENV_POSTGRES_USER=produser
DB_ENV_POSTGRES_PASSWORD=prodpass

This was previously described in #988.

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      , 'i'); if (__m === '*' || __re.test(location.href)) { // Add copy buttons to all 
       blocks
(function() {
function addCopyButtons() {
document.querySelectorAll('pre code').forEach(function(codeBlock) {
if (codeBlock.parentElement.hasAttribute('data-copy-added')) return;
codeBlock.parentElement.setAttribute('data-copy-added', 'true');
var btn = document.createElement('button');
btn.textContent = 'Copy';
btn.style.cssText = 'position:absolute;top:4px;right:4px;padding:2px 8px;font-size:11px;background:#4ecdc4;border:none;border-radius:4px;color:#1a1a2e;cursor:pointer;opacity:0.7;transition:opacity 0.2s;';
btn.onmouseover = function() { this.style.opacity = '1'; };
btn.onmouseout = function() { this.style.opacity = '0.7'; };
btn.onclick = function() {
navigator.clipboard.writeText(codeBlock.textContent).then(function() {
btn.textContent = 'Copied!';
setTimeout(function() { btn.textContent = 'Copy'; }, 1500);
});
};
codeBlock.parentElement.style.position = 'relative';
codeBlock.parentElement.appendChild(btn);
});
}
addCopyButtons();
// Re-run on dynamic content
var observer = new MutationObserver(addCopyButtons);
observer.observe(document.body, { childList: true, subtree: true });
})();
}
} catch(__e) { console.warn('[Userscript:Add Copy Buttons to Code Blocks]', __e); }
})();
(function(){
try {
var __m = "github.com";
var __re = new RegExp('^' + "github\\.com" + '
Link to a service which isn't a Docker container · Issue #1110 · docker/compose · GitHub
      Skip to content
      Link to a service which isn't a Docker container #1110
      Closed
      Closed
      Link to a service which isn't a Docker container#1110
      Description
      @aanand
      aanand
      opened on Mar 13, 2015
      In production, your database might not be running inside a Docker container, but it's useful to be able to represent it logically inside Compose as a service.
      Compose should have a concept of "external" services, which specify a host/port and can be "linked" from other services. For example:
      db:
type: externalhost: 1.2.3.4port: 5432environment:
POSTGRES_USER: produserPOSTGRES_PASSWORD: prodpass
      This results in services which link to this service being furnished with hostnames and environment variables in exactly the same way as if they were linked to a Docker container:
      $ docker-compose run web cat /etc/hosts
127.0.0.1 localhost
1.2.3.4 db
$ docker-compose run web env
DB_PORT=tcp://1.2.3.4:5432
DB_PORT_5432_TCP=tcp://1.2.3.4:5432
DB_PORT_5432_TCP_ADDR=1.2.3.4
DB_PORT_5432_TCP_PORT=5432
DB_PORT_5432_TCP_PROTO=tcp
DB_ENV_POSTGRES_USER=produser
DB_ENV_POSTGRES_PASSWORD=prodpass
      This was previously described in #988.
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      No one assigned
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, 'i');
if (__m === '*' || __re.test(location.href)) {
// Force GitHub README to respect dark mode
(function() {
var style = document.createElement('style');
style.textContent = '
.markdown-body {
color-scheme: dark light;
}
.markdown-body pre { background: #161b22 !important; }
.markdown-body code { background: rgba(110, 118, 129, 0.4) !important; }
.markdown-body table th, .markdown-body table td { border-color: #30363d !important; }
.markdown-body img { background: #0d1117; }
.markdown-body blockquote { border-left-color: #8b949e; }
.markdown-body hr { border-color: #30363d; }
';
document.head.appendChild(style);
})();
}
} catch(__e) { console.warn('[Userscript:GitHub Dark Mode README Fix]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '
Link to a service which isn't a Docker container · Issue #1110 · docker/compose · GitHub
          Skip to content
          Link to a service which isn't a Docker container #1110
          Closed
          Closed
          Link to a service which isn't a Docker container#1110
          Description
          @aanand
          aanand
          opened on Mar 13, 2015
          In production, your database might not be running inside a Docker container, but it's useful to be able to represent it logically inside Compose as a service.
          Compose should have a concept of "external" services, which specify a host/port and can be "linked" from other services. For example:
          db:
type: externalhost: 1.2.3.4port: 5432environment:
POSTGRES_USER: produserPOSTGRES_PASSWORD: prodpass
          This results in services which link to this service being furnished with hostnames and environment variables in exactly the same way as if they were linked to a Docker container:
          $ docker-compose run web cat /etc/hosts
127.0.0.1 localhost
1.2.3.4 db
$ docker-compose run web env
DB_PORT=tcp://1.2.3.4:5432
DB_PORT_5432_TCP=tcp://1.2.3.4:5432
DB_PORT_5432_TCP_ADDR=1.2.3.4
DB_PORT_5432_TCP_PORT=5432
DB_PORT_5432_TCP_PROTO=tcp
DB_ENV_POSTGRES_USER=produser
DB_ENV_POSTGRES_PASSWORD=prodpass
          This was previously described in #988.
          Metadata
          Metadata
          Assignees
          No one assigned
            Labels
            No labels
            No labels
            Type
            No type
            Projects
            No projects
              Milestone
              No milestone
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              None yet
              Development
              No branches or pull requests
              Issue actions
              
, 'i');
if (__m === '*' || __re.test(location.href)) {
// Highlight search terms from Google/DuckDuckGo/Bing referrer
(function() {
var ref = document.referrer;
var terms = [];
if (ref.includes('google.com') || ref.includes('duckduckgo.com') || ref.includes('bing.com')) {
var url = new URL(ref);
var q = url.searchParams.get('q') || url.searchParams.get('p');
if (q) {
terms = q.split(/\s+/).filter(function(t) { return t.length > 2; });
}
}
if (terms.length === 0) return;
var style = document.createElement('style');
style.textContent = '.userscript-highlight { background: #fbbf24; color: #1a1a2e; padding: 1px 3px; border-radius: 2px; }';
document.head.appendChild(style);
function highlight(node) {
if (node.nodeType === 3) { // text node
var text = node.textContent;
var found = false;
terms.forEach(function(term) {
var regex = new RegExp('(' + term.replace(/[.*+?^${}()|[\]\\]/g, '\\') + ')', 'gi');
if (regex.test(text)) {
found = true;
var frag = document.createDocumentFragment();
var parts = text.split(regex);
parts.forEach(function(part, i) {
if (i % 2 === 0) {
frag.appendChild(document.createTextNode(part));
} else {
var span = document.createElement('span');
span.className = 'userscript-highlight';
span.textContent = part;
frag.appendChild(span);
}
});
node.parentNode.replaceChild(frag, node);
}
});
} else if (node.nodeType === 1 && node.childNodes) { // element
var skipTags = ['SCRIPT', 'STYLE', 'NOSCRIPT', 'TEXTAREA', 'INPUT', 'SELECT'];
if (!skipTags.includes(node.tagName)) {
Array.from(node.childNodes).forEach(highlight);
}
}
}
highlight(document.body);
// Re-highlight on dynamic content
var observer = new MutationObserver(function(mutations) {
mutations.forEach(function(m) {
m.addedNodes.forEach(function(node) {
if (node.nodeType === 1 || node.nodeType === 3) highlight(node);
});
});
});
observer.observe(document.body, { childList: true, subtree: true });
})();
}
} catch(__e) { console.warn('[Userscript:Highlight Search Terms]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '
Link to a service which isn't a Docker container · Issue #1110 · docker/compose · GitHub
              Skip to content
              Link to a service which isn't a Docker container #1110
              Closed
              Closed
              Link to a service which isn't a Docker container#1110
              Description
              @aanand
              aanand
              opened on Mar 13, 2015
              In production, your database might not be running inside a Docker container, but it's useful to be able to represent it logically inside Compose as a service.
              Compose should have a concept of "external" services, which specify a host/port and can be "linked" from other services. For example:
              db:
type: externalhost: 1.2.3.4port: 5432environment:
POSTGRES_USER: produserPOSTGRES_PASSWORD: prodpass
              This results in services which link to this service being furnished with hostnames and environment variables in exactly the same way as if they were linked to a Docker container:
              $ docker-compose run web cat /etc/hosts
127.0.0.1 localhost
1.2.3.4 db
$ docker-compose run web env
DB_PORT=tcp://1.2.3.4:5432
DB_PORT_5432_TCP=tcp://1.2.3.4:5432
DB_PORT_5432_TCP_ADDR=1.2.3.4
DB_PORT_5432_TCP_PORT=5432
DB_PORT_5432_TCP_PROTO=tcp
DB_ENV_POSTGRES_USER=produser
DB_ENV_POSTGRES_PASSWORD=prodpass
              This was previously described in #988.
              Metadata
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              Assignees
              No one assigned
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                No labels
                Type
                No type
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                No projects
                  Milestone
                  No milestone
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                  None yet
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                  No branches or pull requests
                  Issue actions
                  
, 'i');
if (__m === '*' || __re.test(location.href)) {
// Strip utm_, fbclid, gclid, etc. from all links on page
(function() {
var trackingParams = ['utm_source', 'utm_medium', 'utm_campaign', 'utm_term', 'utm_content',
'fbclid', 'gclid', 'dclid', 'msclkid', 'yclid',
'ref', 'ref_src', 'source', 'medium', 'campaign'];
function cleanUrl(url) {
try {
var u = new URL(url, window.location.origin);
var changed = false;
trackingParams.forEach(function(p) {
if (u.searchParams.has(p)) {
u.searchParams.delete(p);
changed = true;
}
});
return changed ? u.toString() : url;
} catch (e) {
return url;
}
}
function cleanLinks() {
document.querySelectorAll('a[href]').forEach(function(a) {
var clean = cleanUrl(a.href);
if (clean !== a.href) a.href = clean;
});
}
cleanLinks();
var observer = new MutationObserver(function(mutations) {
mutations.forEach(function(m) {
m.addedNodes.forEach(function(node) {
if (node.nodeType === 1) {
if (node.tagName === 'A') cleanLinks();
node.querySelectorAll('a[href]').forEach(function(a) {
var clean = cleanUrl(a.href);
if (clean !== a.href) a.href = clean;
});
}
});
});
});
observer.observe(document.body, { childList: true, subtree: true });
})();
}
} catch(__e) { console.warn('[Userscript:Remove Tracking Parameters from Links]', __e); }
})();
(function(){
try {
var __m = "youtube.com";
var __re = new RegExp('^' + "youtube\\.com" + '
Link to a service which isn't a Docker container · Issue #1110 · docker/compose · GitHub
                  Skip to content
                  Link to a service which isn't a Docker container #1110
                  Closed
                  Closed
                  Link to a service which isn't a Docker container#1110
                  Description
                  @aanand
                  aanand
                  opened on Mar 13, 2015
                  In production, your database might not be running inside a Docker container, but it's useful to be able to represent it logically inside Compose as a service.
                  Compose should have a concept of "external" services, which specify a host/port and can be "linked" from other services. For example:
                  db:
type: externalhost: 1.2.3.4port: 5432environment:
POSTGRES_USER: produserPOSTGRES_PASSWORD: prodpass
                  This results in services which link to this service being furnished with hostnames and environment variables in exactly the same way as if they were linked to a Docker container:
                  $ docker-compose run web cat /etc/hosts
127.0.0.1 localhost
1.2.3.4 db
$ docker-compose run web env
DB_PORT=tcp://1.2.3.4:5432
DB_PORT_5432_TCP=tcp://1.2.3.4:5432
DB_PORT_5432_TCP_ADDR=1.2.3.4
DB_PORT_5432_TCP_PORT=5432
DB_PORT_5432_TCP_PROTO=tcp
DB_ENV_POSTGRES_USER=produser
DB_ENV_POSTGRES_PASSWORD=prodpass
                  This was previously described in #988.
                  Metadata
                  Metadata
                  Assignees
                  No one assigned
                    Labels
                    No labels
                    No labels
                    Type
                    No type
                    Projects
                    No projects
                      Milestone
                      No milestone
                      Relationships
                      None yet
                      Development
                      No branches or pull requests
                      Issue actions
                      
, 'i');
if (__m === '*' || __re.test(location.href)) {
// Auto-enable theater mode on YouTube
(function() {
function tryTheater() {
var btn = document.querySelector('button[aria-label="Theater mode"], ytd-player #player button[title="Theater mode"]');
if (btn && !btn.classList.contains('activated')) {
btn.click();
}
}
// Try immediately
tryTheater();
// Try after navigation (SPA)
var lastUrl = location.href;
setInterval(function() {
if (location.href !== lastUrl) {
lastUrl = location.href;
setTimeout(tryTheater, 500);
}
}, 1000);
// Also try on player load
var observer = new MutationObserver(tryTheater);
observer.observe(document.body, { childList: true, subtree: true });
})();
}
} catch(__e) { console.warn('[Userscript:YouTube Theater Mode Default]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '
Link to a service which isn't a Docker container · Issue #1110 · docker/compose · GitHub
                      Skip to content
                      Link to a service which isn't a Docker container #1110
                      Closed
                      Closed
                      Link to a service which isn't a Docker container#1110
                      Description
                      @aanand
                      aanand
                      opened on Mar 13, 2015
                      In production, your database might not be running inside a Docker container, but it's useful to be able to represent it logically inside Compose as a service.
                      Compose should have a concept of "external" services, which specify a host/port and can be "linked" from other services. For example:
                      db:
type: externalhost: 1.2.3.4port: 5432environment:
POSTGRES_USER: produserPOSTGRES_PASSWORD: prodpass
                      This results in services which link to this service being furnished with hostnames and environment variables in exactly the same way as if they were linked to a Docker container:
                      $ docker-compose run web cat /etc/hosts
127.0.0.1 localhost
1.2.3.4 db
$ docker-compose run web env
DB_PORT=tcp://1.2.3.4:5432
DB_PORT_5432_TCP=tcp://1.2.3.4:5432
DB_PORT_5432_TCP_ADDR=1.2.3.4
DB_PORT_5432_TCP_PORT=5432
DB_PORT_5432_TCP_PROTO=tcp
DB_ENV_POSTGRES_USER=produser
DB_ENV_POSTGRES_PASSWORD=prodpass
                      This was previously described in #988.
                      Metadata
                      Metadata
                      Assignees
                      No one assigned
                        Labels
                        No labels
                        No labels
                        Type
                        No type
                        Projects
                        No projects
                          Milestone
                          No milestone
                          Relationships
                          None yet
                          Development
                          No branches or pull requests
                          Issue actions
                          
, 'i');
if (__m === '*' || __re.test(location.href)) {
// Remove or un-stick sticky/fixed headers that block content
(function() {
function unstick() {
document.querySelectorAll('header, nav, [role="banner"], .header, .navbar, .sticky, .fixed-top, [style*="position: fixed"], [style*="position:sticky"]').forEach(function(el) {
if (el.style.position === 'fixed' || el.style.position === 'sticky' || getComputedStyle(el).position === 'fixed' || getComputedStyle(el).position === 'sticky') {
el.style.position = 'static';
el.style.top = 'auto';
el.style.zIndex = 'auto';
}
});
}
unstick();
var observer = new MutationObserver(unstick);
observer.observe(document.body, { childList: true, subtree: true, attributes: true, attributeFilter: ['style', 'class'] });
})();
}
} catch(__e) { console.warn('[Userscript:Kill Sticky Headers]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '
Link to a service which isn't a Docker container · Issue #1110 · docker/compose · GitHub
                          Skip to content
                          Link to a service which isn't a Docker container #1110
                          Closed
                          Closed
                          Link to a service which isn't a Docker container#1110
                          Description
                          @aanand
                          aanand
                          opened on Mar 13, 2015
                          In production, your database might not be running inside a Docker container, but it's useful to be able to represent it logically inside Compose as a service.
                          Compose should have a concept of "external" services, which specify a host/port and can be "linked" from other services. For example:
                          db:
type: externalhost: 1.2.3.4port: 5432environment:
POSTGRES_USER: produserPOSTGRES_PASSWORD: prodpass
                          This results in services which link to this service being furnished with hostnames and environment variables in exactly the same way as if they were linked to a Docker container:
                          $ docker-compose run web cat /etc/hosts
127.0.0.1 localhost
1.2.3.4 db
$ docker-compose run web env
DB_PORT=tcp://1.2.3.4:5432
DB_PORT_5432_TCP=tcp://1.2.3.4:5432
DB_PORT_5432_TCP_ADDR=1.2.3.4
DB_PORT_5432_TCP_PORT=5432
DB_PORT_5432_TCP_PROTO=tcp
DB_ENV_POSTGRES_USER=produser
DB_ENV_POSTGRES_PASSWORD=prodpass
                          This was previously described in #988.
                          Metadata
                          Metadata
                          Assignees
                          No one assigned
                            Labels
                            No labels
                            No labels
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                            No type
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                            No projects
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                              No branches or pull requests
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, 'i');
if (__m === '*' || __re.test(location.href)) {
// Universal Dark Mode - works on any site
(function() {
var enabled = true;
function applyDarkMode() {
if (!enabled) return;
// Create style element if it doesn't exist
var style = document.getElementById('universal-dark-mode-style');
if (!style) {
style = document.createElement('style');
style.id = 'universal-dark-mode-style';
document.head.appendChild(style);
}
// Dark mode CSS - inverts colors but preserves images/video
style.textContent = '
/* Invert everything except media */
html {
filter: invert(1) hue-rotate(180deg) !important;
background: #1a1a2e !important;
}
/* Restore images, videos, iframes, canvas */
img, video, iframe, canvas, svg, picture, [style*="background-image"] {
filter: invert(1) hue-rotate(180deg) !important;
}
/* Preserve specific elements that should not be inverted */
.no-dark-mode, .no-dark-mode *,
[data-theme="light"], [data-theme="light"],
.ace_editor, .ace_editor *,
.CodeMirror, .CodeMirror *,
.monaco-editor, .monaco-editor *,
.markdown-body pre, .markdown-body pre *,
.highlight, .highlight *,
pre code, pre code * {
filter: none !important;
}
/* Fix common UI elements */
.modal, .popup, .dropdown-menu, .tooltip, .popover {
filter: invert(1) hue-rotate(180deg) !important;
background: #2d2d44 !important;
border-color: #444 !important;
}
/* Scrollbars */
::-webkit-scrollbar { background: #1a1a2e !important; }
::-webkit-scrollbar-thumb { background: #444 !important; }
::-webkit-scrollbar-thumb:hover { background: #555 !important; }
/* Selection */
::selection { background: #4ecdc4 !important; color: #1a1a2e !important; }
::-moz-selection { background: #4ecdc4 !important; color: #1a1a2e !important; }
';
}
function removeDarkMode() {
var style = document.getElementById('universal-dark-mode-style');
if (style) style.remove();
}
// Toggle with Alt+Shift+D
document.addEventListener('keydown', function(e) {
if (e.altKey && e.shiftKey && e.key === 'D') {
e.preventDefault();
enabled = !enabled;
if (enabled) {
applyDarkMode();
console.log('[Universal Dark Mode] Enabled');
} else {
removeDarkMode();
console.log('[Universal Dark Mode] Disabled');
}
}
});
// Apply on load
applyDarkMode();
// Re-apply on dynamic content
var observer = new MutationObserver(function(mutations) {
if (enabled && !document.getElementById('universal-dark-mode-style')) {
applyDarkMode();
}
});
observer.observe(document.head, { childList: true });
console.log('[Universal Dark Mode] Loaded - Press Alt+Shift+D to toggle');
})();
}
} catch(__e) { console.warn('[Userscript:Universal Dark Mode]', __e); }
})();
})();
Link to a service which isn't a Docker container · Issue #1110 · docker/compose · GitHub
                              Skip to content
                              Link to a service which isn't a Docker container #1110
                              Closed
                              Closed
                              Link to a service which isn't a Docker container#1110
                              Description
                              @aanand
                              aanand
                              opened on Mar 13, 2015
                              In production, your database might not be running inside a Docker container, but it's useful to be able to represent it logically inside Compose as a service.
                              Compose should have a concept of "external" services, which specify a host/port and can be "linked" from other services. For example:
                              db:
type: externalhost: 1.2.3.4port: 5432environment:
POSTGRES_USER: produserPOSTGRES_PASSWORD: prodpass
                              This results in services which link to this service being furnished with hostnames and environment variables in exactly the same way as if they were linked to a Docker container:
                              $ docker-compose run web cat /etc/hosts
127.0.0.1 localhost
1.2.3.4 db
$ docker-compose run web env
DB_PORT=tcp://1.2.3.4:5432
DB_PORT_5432_TCP=tcp://1.2.3.4:5432
DB_PORT_5432_TCP_ADDR=1.2.3.4
DB_PORT_5432_TCP_PORT=5432
DB_PORT_5432_TCP_PROTO=tcp
DB_ENV_POSTGRES_USER=produser
DB_ENV_POSTGRES_PASSWORD=prodpass
                              This was previously described in #988.
                              Metadata
                              Metadata
                              Assignees
                              No one assigned
                                Labels
                                No labels
                                No labels
                                Type
                                No type
                                Projects
                                No projects
                                  Milestone
                                  No milestone
                                  Relationships
                                  None yet
                                  Development
                                  No branches or pull requests
                                  Issue actions