Add section about desktop session embedding
authorMartin Pitt <martin@piware.de>
Thu, 16 Jan 2020 15:33:29 +0000 (16:33 +0100)
committerMartin Pitt <martin@piware.de>
Thu, 16 Jan 2020 15:36:04 +0000 (16:36 +0100)
cockpit-auth-anywhere.md
local-session-unsafe.drawio [new file with mode: 0644]
local-session-unsafe.pdf [new file with mode: 0644]
local-session.drawio [new file with mode: 0644]
local-session.pdf [new file with mode: 0644]

index b5a53c27f70e77f33144550773449f7da814dff4..bc8783d7f8c4e8b4e86425826f6c7f29e0bff1af 100644 (file)
@@ -7,7 +7,6 @@ date: DevConv.CZ 2020
 theme: Singapore
 header-includes:
  - \setbeameroption{show notes}
- - \newcommand{\fullsizeimg}[1]{\makebox[\linewidth]{\includegraphics[width=\paperwidth]{#1}}}
 ...
 
 # Cockpit what?
@@ -52,8 +51,10 @@ resize2fs /dev/vg0/data1
 - Quit virt-viewer
 - Move to local browser, enable mobile mode (Ctrl+Shift+M)
 - Zero configuration so far, other than possibly installing cockpit pkg and enabling cockpit.socket
+- But wait, you say -- want to admin that server over there, but not allowed to
+  open new port and system service?
 - In larger environments it's impractical to install cockpit server on hundreds
-  of machines and using the login web page
+  of machines and using the login web page; better solution: piggyback on ssh
 - Glimpse of how to customize how cockpit runs and how to authenticate to it
 :::
 
@@ -139,7 +140,7 @@ RequireHost=true
 
 - SSO/Kerberos in Identity Management domains
 - smart card/client certificate authentication
-- OAuth (Kubernetes)
+- OAuth (external embedding)
 - Foreman: included cockpit-ws with dynamic configuration
 
 TODO: foreman screenshot
@@ -150,17 +151,72 @@ TODO: foreman screenshot
   without the login page
 - browsers can ask for TLS client certificates, commonly with smart cards, and
   present them to the web server; latest Cockpit versions supports that
-- Foreman has a "Web Console" button; already has ssh to all maintained
-  machines
+- Foreman has a "Web Console" button; interesting case for seamless transition
+  between Foreman and Cockpit
+- already has ssh to all maintained machines
 - runs a single cockpit-ws process on its server, and dynamically configures it
-  for selected target machine, seamless transition between Foreman and Cockpit
+  for selected target machine
+- custom cockpit session helper to do OAuth between Foreman session and
+  cockpit-ws, and wrap cockpit-ssh session starter
 - not enough time to demo and explain all of this; just keep in mind that it's
   possible
 :::
 
-# Custom authentication example
+# Embedding into existing session
+
+![local-session-unsafe](local-session-unsafe.pdf){height=60%}\ 
+
+\footnotesize \verb!cockpit-ws -p 9999 --no-tls --local-session=/usr/bin/cockpit-bridge!
+
+`firefox http://localhost:9999`
+
+:::notes
+- what I do want to show: opposite direction; "replace cockpit-session" can
+  also mean "by nothing"
+- due to common JSON protocol, we can connect ws directly to a cockpit-bridge
+- take a step back: if I want to admin this very machine, it's in a running
+  Linux session, it knows who I am
+- put the whole auth structure inside out and instead run cockpit-ws as my user
+  inside my session
+- open localhost:9999 in firefox
+- alarm bells: exposes my session to a TCP port without any auth
+:::
+
+
+# Embedding into existing session: once more with safety!
+
+![local-session-unsafe](local-session.pdf){height=60%}\ 
+
+\footnotesize \verb! !
+
+`/usr/libexec/cockpit-desktop [page]`
+
+:::notes
+- need to hide that port; put browser and cockpit-ws into network namespace,
+  then they live in a completely isolated world
+- do some work to hide browser chrome, use webkit if available
+- cockpit-desktop /
+- wants to run priv bridge, can accept or decline
+- decline, R/O view
+- can show an individual iframe, "page"
+- suddenly you end up with a halfway decent desktop app
+- just the storage page, replacement for gnome-disks
+- cockpit-desktop podman
+:::
+
+# Conclusion
+
+- Authentication is very flexible
+- Works with zero configuration
+- Can be arbitrarily embedded
+
+:::notes
+- Cockpit provides a set of standard auth protocols that are being used in
+  today's modern deployments
+- Once you know about the structure, you can combine ssh, web servers, reverse
+  proxies, and custom auth helpers to embed Cockpit anywhere you want
+:::
 
-TODO
 
 # Q & A
 
diff --git a/local-session-unsafe.drawio b/local-session-unsafe.drawio
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diff --git a/local-session-unsafe.pdf b/local-session-unsafe.pdf
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diff --git a/local-session.drawio b/local-session.drawio
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@@ -0,0 +1 @@
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