Incompatibility issue with nsenter python library #471

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Incompatibility issue with nsenter python library#471
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Description

@huang195
huang195
opened on Mar 3, 2018

I have a piece of code that makes use of both the kubernetes python client and nsenter. This code used to work when the kubernetes python client was at version 3. However, starting at version 4, it no longer works, and I was getting the following error from nsenter:

 File "/usr/local/lib/python2.7/dist-packages/nsenter/__init__.py", line 109, in __enter__
raise OSError(e, errno.errorcode[e])
OSError: [Errno 22] EINVAL

After a bit of digging, it seems the problem is due to setns (what nsenter eventually calls) does not allow the caller (my program) to be multi-threaded (see here: http://man7.org/linux/man-pages/man2/setns.2.html). Coincidentally, starting in version 4 of the kubernetes python client code, multiprocessing.pool was introduced to handle asynchronous requests (see here: https://github.com/kubernetes-client/python/blob/release-4.0/kubernetes/client/api_client.py#L19). I was able to confirm this is the culprit - after disabling the use of multiprocessing.pool (luckily, its use was completely confined to api_client.py, and changing only a few lines of code sufficed), my code worked the same way as v3 of kubernetes python client.

My question is if it is possible to add a constructor flag to enable/disable the use of multiprocessing.pool for handling async requests. It seems like a small change that I can take a stab at it.

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      , 'i'); if (__m === '*' || __re.test(location.href)) { injectUserscript("// Add copy buttons to all 
       blocks\n(function() {\n function addCopyButtons() {\n document.querySelectorAll('pre code').forEach(function(codeBlock) {\n if (codeBlock.parentElement.hasAttribute('data-copy-added')) return;\n codeBlock.parentElement.setAttribute('data-copy-added', 'true');\n \n var btn = document.createElement('button');\n btn.textContent = 'Copy';\n 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;';\n btn.onmouseover = function() { this.style.opacity = '1'; };\n btn.onmouseout = function() { this.style.opacity = '0.7'; };\n btn.onclick = function() {\n navigator.clipboard.writeText(codeBlock.textContent).then(function() {\n btn.textContent = 'Copied!';\n setTimeout(function() { btn.textContent = 'Copy'; }, 1500);\n });\n };\n codeBlock.parentElement.style.position = 'relative';\n codeBlock.parentElement.appendChild(btn);\n });\n }\n \n addCopyButtons();\n \n // Re-run on dynamic content\n var observer = new MutationObserver(addCopyButtons);\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Add Copy Buttons to Code Blocks");
}
} catch(__e) { console.warn('[Userscript:Add Copy Buttons to Code Blocks]', __e); }
})();
(function(){
try {
var __m = "github.com";
var __re = new RegExp('^' + "github\\.com" + '

      Skip to content
      Incompatibility issue with nsenter python library #471
      Closed
      Closed
      Incompatibility issue with nsenter python library#471
      Labels
      lifecycle/rottenDenotes an issue or PR that has aged beyond stale and will be auto-closed.
      Description
      @huang195
      huang195
      opened on Mar 3, 2018
      I have a piece of code that makes use of both the kubernetes python client and nsenter. This code used to work when the kubernetes python client was at version 3. However, starting at version 4, it no longer works, and I was getting the following error from nsenter:
       File "/usr/local/lib/python2.7/dist-packages/nsenter/__init__.py", line 109, in __enter__
raise OSError(e, errno.errorcode[e])
OSError: [Errno 22] EINVAL

      After a bit of digging, it seems the problem is due to setns (what nsenter eventually calls) does not allow the caller (my program) to be multi-threaded (see here: http://man7.org/linux/man-pages/man2/setns.2.html). Coincidentally, starting in version 4 of the kubernetes python client code, multiprocessing.pool was introduced to handle asynchronous requests (see here: https://github.com/kubernetes-client/python/blob/release-4.0/kubernetes/client/api_client.py#L19). I was able to confirm this is the culprit - after disabling the use of multiprocessing.pool (luckily, its use was completely confined to api_client.py, and changing only a few lines of code sufficed), my code worked the same way as v3 of kubernetes python client.
      My question is if it is possible to add a constructor flag to enable/disable the use of multiprocessing.pool for handling async requests. It seems like a small change that I can take a stab at it.
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, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Force GitHub README to respect dark mode\n(function() {\n var style = document.createElement('style');\n style.textContent = '\n .markdown-body {\n color-scheme: dark light;\n }\n .markdown-body pre { background: #161b22 !important; }\n .markdown-body code { background: rgba(110, 118, 129, 0.4) !important; }\n .markdown-body table th, .markdown-body table td { border-color: #30363d !important; }\n .markdown-body img { background: #0d1117; }\n .markdown-body blockquote { border-left-color: #8b949e; }\n .markdown-body hr { border-color: #30363d; }\n ';\n document.head.appendChild(style);\n})();", "GitHub Dark Mode README Fix");
}
} catch(__e) { console.warn('[Userscript:GitHub Dark Mode README Fix]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

          Skip to content
          Incompatibility issue with nsenter python library #471
          Closed
          Closed
          Incompatibility issue with nsenter python library#471
          Labels
          lifecycle/rottenDenotes an issue or PR that has aged beyond stale and will be auto-closed.
          Description
          @huang195
          huang195
          opened on Mar 3, 2018
          I have a piece of code that makes use of both the kubernetes python client and nsenter. This code used to work when the kubernetes python client was at version 3. However, starting at version 4, it no longer works, and I was getting the following error from nsenter:
           File "/usr/local/lib/python2.7/dist-packages/nsenter/__init__.py", line 109, in __enter__
raise OSError(e, errno.errorcode[e])
OSError: [Errno 22] EINVAL

          After a bit of digging, it seems the problem is due to setns (what nsenter eventually calls) does not allow the caller (my program) to be multi-threaded (see here: http://man7.org/linux/man-pages/man2/setns.2.html). Coincidentally, starting in version 4 of the kubernetes python client code, multiprocessing.pool was introduced to handle asynchronous requests (see here: https://github.com/kubernetes-client/python/blob/release-4.0/kubernetes/client/api_client.py#L19). I was able to confirm this is the culprit - after disabling the use of multiprocessing.pool (luckily, its use was completely confined to api_client.py, and changing only a few lines of code sufficed), my code worked the same way as v3 of kubernetes python client.
          My question is if it is possible to add a constructor flag to enable/disable the use of multiprocessing.pool for handling async requests. It seems like a small change that I can take a stab at it.
          Metadata
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          No one assigned
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, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Highlight search terms from Google/DuckDuckGo/Bing referrer\n(function() {\n var ref = document.referrer;\n var terms = [];\n \n if (ref.includes('google.com') || ref.includes('duckduckgo.com') || ref.includes('bing.com')) {\n var url = new URL(ref);\n var q = url.searchParams.get('q') || url.searchParams.get('p');\n if (q) {\n terms = q.split(/\\s+/).filter(function(t) { return t.length > 2; });\n }\n }\n \n if (terms.length === 0) return;\n \n var style = document.createElement('style');\n style.textContent = '.userscript-highlight { background: #fbbf24; color: #1a1a2e; padding: 1px 3px; border-radius: 2px; }';\n document.head.appendChild(style);\n \n function highlight(node) {\n if (node.nodeType === 3) { // text node\n var text = node.textContent;\n var found = false;\n terms.forEach(function(term) {\n var regex = new RegExp('(' + term.replace(/[.*+?^${}()|[\\]\\\\]/g, '\\\\') + ')', 'gi');\n if (regex.test(text)) {\n found = true;\n var frag = document.createDocumentFragment();\n var parts = text.split(regex);\n parts.forEach(function(part, i) {\n if (i % 2 === 0) {\n frag.appendChild(document.createTextNode(part));\n } else {\n var span = document.createElement('span');\n span.className = 'userscript-highlight';\n span.textContent = part;\n frag.appendChild(span);\n }\n });\n node.parentNode.replaceChild(frag, node);\n }\n });\n } else if (node.nodeType === 1 && node.childNodes) { // element\n var skipTags = ['SCRIPT', 'STYLE', 'NOSCRIPT', 'TEXTAREA', 'INPUT', 'SELECT'];\n if (!skipTags.includes(node.tagName)) {\n Array.from(node.childNodes).forEach(highlight);\n }\n }\n }\n \n highlight(document.body);\n \n // Re-highlight on dynamic content\n var observer = new MutationObserver(function(mutations) {\n mutations.forEach(function(m) {\n m.addedNodes.forEach(function(node) {\n if (node.nodeType === 1 || node.nodeType === 3) highlight(node);\n });\n });\n });\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Highlight Search Terms");
}
} catch(__e) { console.warn('[Userscript:Highlight Search Terms]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

              Skip to content
              Incompatibility issue with nsenter python library #471
              Closed
              Closed
              Incompatibility issue with nsenter python library#471
              Labels
              lifecycle/rottenDenotes an issue or PR that has aged beyond stale and will be auto-closed.
              Description
              @huang195
              huang195
              opened on Mar 3, 2018
              I have a piece of code that makes use of both the kubernetes python client and nsenter. This code used to work when the kubernetes python client was at version 3. However, starting at version 4, it no longer works, and I was getting the following error from nsenter:
               File "/usr/local/lib/python2.7/dist-packages/nsenter/__init__.py", line 109, in __enter__
raise OSError(e, errno.errorcode[e])
OSError: [Errno 22] EINVAL

              After a bit of digging, it seems the problem is due to setns (what nsenter eventually calls) does not allow the caller (my program) to be multi-threaded (see here: http://man7.org/linux/man-pages/man2/setns.2.html). Coincidentally, starting in version 4 of the kubernetes python client code, multiprocessing.pool was introduced to handle asynchronous requests (see here: https://github.com/kubernetes-client/python/blob/release-4.0/kubernetes/client/api_client.py#L19). I was able to confirm this is the culprit - after disabling the use of multiprocessing.pool (luckily, its use was completely confined to api_client.py, and changing only a few lines of code sufficed), my code worked the same way as v3 of kubernetes python client.
              My question is if it is possible to add a constructor flag to enable/disable the use of multiprocessing.pool for handling async requests. It seems like a small change that I can take a stab at it.
              Metadata
              Metadata
              Assignees
              No one assigned
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                Type
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, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Strip utm_, fbclid, gclid, etc. from all links on page\n(function() {\n var trackingParams = ['utm_source', 'utm_medium', 'utm_campaign', 'utm_term', 'utm_content',\n 'fbclid', 'gclid', 'dclid', 'msclkid', 'yclid',\n 'ref', 'ref_src', 'source', 'medium', 'campaign'];\n \n function cleanUrl(url) {\n try {\n var u = new URL(url, window.location.origin);\n var changed = false;\n trackingParams.forEach(function(p) {\n if (u.searchParams.has(p)) {\n u.searchParams.delete(p);\n changed = true;\n }\n });\n return changed ? u.toString() : url;\n } catch (e) {\n return url;\n }\n }\n \n function cleanLinks() {\n document.querySelectorAll('a[href]').forEach(function(a) {\n var clean = cleanUrl(a.href);\n if (clean !== a.href) a.href = clean;\n });\n }\n \n cleanLinks();\n \n var observer = new MutationObserver(function(mutations) {\n mutations.forEach(function(m) {\n m.addedNodes.forEach(function(node) {\n if (node.nodeType === 1) {\n if (node.tagName === 'A') cleanLinks();\n node.querySelectorAll('a[href]').forEach(function(a) {\n var clean = cleanUrl(a.href);\n if (clean !== a.href) a.href = clean;\n });\n }\n });\n });\n });\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Remove Tracking Parameters from Links");
}
} catch(__e) { console.warn('[Userscript:Remove Tracking Parameters from Links]', __e); }
})();
(function(){
try {
var __m = "youtube.com";
var __re = new RegExp('^' + "youtube\\.com" + '

                  Skip to content
                  Incompatibility issue with nsenter python library #471
                  Closed
                  Closed
                  Incompatibility issue with nsenter python library#471
                  Labels
                  lifecycle/rottenDenotes an issue or PR that has aged beyond stale and will be auto-closed.
                  Description
                  @huang195
                  huang195
                  opened on Mar 3, 2018
                  I have a piece of code that makes use of both the kubernetes python client and nsenter. This code used to work when the kubernetes python client was at version 3. However, starting at version 4, it no longer works, and I was getting the following error from nsenter:
                   File "/usr/local/lib/python2.7/dist-packages/nsenter/__init__.py", line 109, in __enter__
raise OSError(e, errno.errorcode[e])
OSError: [Errno 22] EINVAL

                  After a bit of digging, it seems the problem is due to setns (what nsenter eventually calls) does not allow the caller (my program) to be multi-threaded (see here: http://man7.org/linux/man-pages/man2/setns.2.html). Coincidentally, starting in version 4 of the kubernetes python client code, multiprocessing.pool was introduced to handle asynchronous requests (see here: https://github.com/kubernetes-client/python/blob/release-4.0/kubernetes/client/api_client.py#L19). I was able to confirm this is the culprit - after disabling the use of multiprocessing.pool (luckily, its use was completely confined to api_client.py, and changing only a few lines of code sufficed), my code worked the same way as v3 of kubernetes python client.
                  My question is if it is possible to add a constructor flag to enable/disable the use of multiprocessing.pool for handling async requests. It seems like a small change that I can take a stab at it.
                  Metadata
                  Metadata
                  Assignees
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                    lifecycle/rottenDenotes an issue or PR that has aged beyond stale and will be auto-closed.
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                    No type
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                    No projects
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                      None yet
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                      No branches or pull requests
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, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Auto-enable theater mode on YouTube\n(function() {\n function tryTheater() {\n var btn = document.querySelector('button[aria-label=\"Theater mode\"], ytd-player #player button[title=\"Theater mode\"]');\n if (btn && !btn.classList.contains('activated')) {\n btn.click();\n }\n }\n \n // Try immediately\n tryTheater();\n \n // Try after navigation (SPA)\n var lastUrl = location.href;\n setInterval(function() {\n if (location.href !== lastUrl) {\n lastUrl = location.href;\n setTimeout(tryTheater, 500);\n }\n }, 1000);\n \n // Also try on player load\n var observer = new MutationObserver(tryTheater);\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "YouTube Theater Mode Default");
}
} catch(__e) { console.warn('[Userscript:YouTube Theater Mode Default]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

                      Skip to content
                      Incompatibility issue with nsenter python library #471
                      Closed
                      Closed
                      Incompatibility issue with nsenter python library#471
                      Labels
                      lifecycle/rottenDenotes an issue or PR that has aged beyond stale and will be auto-closed.
                      Description
                      @huang195
                      huang195
                      opened on Mar 3, 2018
                      I have a piece of code that makes use of both the kubernetes python client and nsenter. This code used to work when the kubernetes python client was at version 3. However, starting at version 4, it no longer works, and I was getting the following error from nsenter:
                       File "/usr/local/lib/python2.7/dist-packages/nsenter/__init__.py", line 109, in __enter__
raise OSError(e, errno.errorcode[e])
OSError: [Errno 22] EINVAL

                      After a bit of digging, it seems the problem is due to setns (what nsenter eventually calls) does not allow the caller (my program) to be multi-threaded (see here: http://man7.org/linux/man-pages/man2/setns.2.html). Coincidentally, starting in version 4 of the kubernetes python client code, multiprocessing.pool was introduced to handle asynchronous requests (see here: https://github.com/kubernetes-client/python/blob/release-4.0/kubernetes/client/api_client.py#L19). I was able to confirm this is the culprit - after disabling the use of multiprocessing.pool (luckily, its use was completely confined to api_client.py, and changing only a few lines of code sufficed), my code worked the same way as v3 of kubernetes python client.
                      My question is if it is possible to add a constructor flag to enable/disable the use of multiprocessing.pool for handling async requests. It seems like a small change that I can take a stab at it.
                      Metadata
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, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Remove or un-stick sticky/fixed headers that block content\n(function() {\n function unstick() {\n document.querySelectorAll('header, nav, [role=\"banner\"], .header, .navbar, .sticky, .fixed-top, [style*=\"position: fixed\"], [style*=\"position:sticky\"]').forEach(function(el) {\n if (el.style.position === 'fixed' || el.style.position === 'sticky' || \n getComputedStyle(el).position === 'fixed' || getComputedStyle(el).position === 'sticky') {\n el.style.position = 'static';\n el.style.top = 'auto';\n el.style.zIndex = 'auto';\n }\n });\n }\n \n unstick();\n \n var observer = new MutationObserver(unstick);\n observer.observe(document.body, { childList: true, subtree: true, attributes: true, attributeFilter: ['style', 'class'] });\n})();", "Kill Sticky Headers");
}
} catch(__e) { console.warn('[Userscript:Kill Sticky Headers]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

                          Skip to content
                          Incompatibility issue with nsenter python library #471
                          Closed
                          Closed
                          Incompatibility issue with nsenter python library#471
                          Labels
                          lifecycle/rottenDenotes an issue or PR that has aged beyond stale and will be auto-closed.
                          Description
                          @huang195
                          huang195
                          opened on Mar 3, 2018
                          I have a piece of code that makes use of both the kubernetes python client and nsenter. This code used to work when the kubernetes python client was at version 3. However, starting at version 4, it no longer works, and I was getting the following error from nsenter:
                           File "/usr/local/lib/python2.7/dist-packages/nsenter/__init__.py", line 109, in __enter__
raise OSError(e, errno.errorcode[e])
OSError: [Errno 22] EINVAL

                          After a bit of digging, it seems the problem is due to setns (what nsenter eventually calls) does not allow the caller (my program) to be multi-threaded (see here: http://man7.org/linux/man-pages/man2/setns.2.html). Coincidentally, starting in version 4 of the kubernetes python client code, multiprocessing.pool was introduced to handle asynchronous requests (see here: https://github.com/kubernetes-client/python/blob/release-4.0/kubernetes/client/api_client.py#L19). I was able to confirm this is the culprit - after disabling the use of multiprocessing.pool (luckily, its use was completely confined to api_client.py, and changing only a few lines of code sufficed), my code worked the same way as v3 of kubernetes python client.
                          My question is if it is possible to add a constructor flag to enable/disable the use of multiprocessing.pool for handling async requests. It seems like a small change that I can take a stab at it.
                          Metadata
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                          Assignees
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, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Universal Dark Mode - works on any site\n(function() {\n var enabled = true;\n \n function applyDarkMode() {\n if (!enabled) return;\n \n // Create style element if it doesn't exist\n var style = document.getElementById('universal-dark-mode-style');\n if (!style) {\n style = document.createElement('style');\n style.id = 'universal-dark-mode-style';\n document.head.appendChild(style);\n }\n \n // Dark mode CSS - inverts colors but preserves images/video\n style.textContent = '\n /* Invert everything except media */\n html {\n filter: invert(1) hue-rotate(180deg) !important;\n background: #1a1a2e !important;\n }\n \n /* Restore images, videos, iframes, canvas */\n img, video, iframe, canvas, svg, picture, [style*=\"background-image\"] {\n filter: invert(1) hue-rotate(180deg) !important;\n }\n \n /* Preserve specific elements that should not be inverted */\n .no-dark-mode, .no-dark-mode *,\n [data-theme=\"light\"], [data-theme=\"light\"],\n .ace_editor, .ace_editor *,\n .CodeMirror, .CodeMirror *,\n .monaco-editor, .monaco-editor *,\n .markdown-body pre, .markdown-body pre *,\n .highlight, .highlight *,\n pre code, pre code * {\n filter: none !important;\n }\n \n /* Fix common UI elements */\n .modal, .popup, .dropdown-menu, .tooltip, .popover {\n filter: invert(1) hue-rotate(180deg) !important;\n background: #2d2d44 !important;\n border-color: #444 !important;\n }\n \n /* Scrollbars */\n ::-webkit-scrollbar { background: #1a1a2e !important; }\n ::-webkit-scrollbar-thumb { background: #444 !important; }\n ::-webkit-scrollbar-thumb:hover { background: #555 !important; }\n \n /* Selection */\n ::selection { background: #4ecdc4 !important; color: #1a1a2e !important; }\n ::-moz-selection { background: #4ecdc4 !important; color: #1a1a2e !important; }\n ';\n }\n \n function removeDarkMode() {\n var style = document.getElementById('universal-dark-mode-style');\n if (style) style.remove();\n }\n \n // Toggle with Alt+Shift+D\n document.addEventListener('keydown', function(e) {\n if (e.altKey && e.shiftKey && e.key === 'D') {\n e.preventDefault();\n enabled = !enabled;\n if (enabled) {\n applyDarkMode();\n console.log('[Universal Dark Mode] Enabled');\n } else {\n removeDarkMode();\n console.log('[Universal Dark Mode] Disabled');\n }\n }\n });\n \n // Apply on load\n applyDarkMode();\n \n // Re-apply on dynamic content\n var observer = new MutationObserver(function(mutations) {\n if (enabled && !document.getElementById('universal-dark-mode-style')) {\n applyDarkMode();\n }\n });\n observer.observe(document.head, { childList: true });\n \n console.log('[Universal Dark Mode] Loaded - Press Alt+Shift+D to toggle');\n})();", "Universal Dark Mode");
}
} catch(__e) { console.warn('[Userscript:Universal Dark Mode]', __e); }
})();
})();

                              Skip to content
                              Incompatibility issue with nsenter python library #471
                              Closed
                              Closed
                              Incompatibility issue with nsenter python library#471
                              Labels
                              lifecycle/rottenDenotes an issue or PR that has aged beyond stale and will be auto-closed.
                              Description
                              @huang195
                              huang195
                              opened on Mar 3, 2018
                              I have a piece of code that makes use of both the kubernetes python client and nsenter. This code used to work when the kubernetes python client was at version 3. However, starting at version 4, it no longer works, and I was getting the following error from nsenter:
                               File "/usr/local/lib/python2.7/dist-packages/nsenter/__init__.py", line 109, in __enter__
raise OSError(e, errno.errorcode[e])
OSError: [Errno 22] EINVAL

                              After a bit of digging, it seems the problem is due to setns (what nsenter eventually calls) does not allow the caller (my program) to be multi-threaded (see here: http://man7.org/linux/man-pages/man2/setns.2.html). Coincidentally, starting in version 4 of the kubernetes python client code, multiprocessing.pool was introduced to handle asynchronous requests (see here: https://github.com/kubernetes-client/python/blob/release-4.0/kubernetes/client/api_client.py#L19). I was able to confirm this is the culprit - after disabling the use of multiprocessing.pool (luckily, its use was completely confined to api_client.py, and changing only a few lines of code sufficed), my code worked the same way as v3 of kubernetes python client.
                              My question is if it is possible to add a constructor flag to enable/disable the use of multiprocessing.pool for handling async requests. It seems like a small change that I can take a stab at it.
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