safety

Author: kainctl

docs/slides/awesome-hello-world.py

@@ -1,59 +1,68 @@
-#!/usr/bin/env python3
+#!/nix/store/qfcbvbm2wzpgh2m1j5b8yd61y8y8x5nw-isd-tui-env/bin/python
 import http.server
-import socketserver
 import time
-import threading
 import sys
 import random
-from pathlib import Path
 
 PORT = 8181
-HELLO_FILE = Path("/opt/hello/hello.txt")
 
 
 class HelloHandler(http.server.SimpleHTTPRequestHandler):
+    def __init__(self, *args, **kwargs):
+        super().__init__(*args, **kwargs)
+
     def do_GET(self):
         self.send_response(200)
         self.send_header("Content-type", "text/plain; charset=utf-8")
         self.end_headers()
-        time.sleep(5)
-        try:
-            text = HELLO_FILE.read_text()
-        except Exception as e:
-            text = f"ERROR: cannot read {HELLO_FILE}: {e}"
-        self.wfile.write(text.encode("utf-8"))
-
-
-def noisy_logger():
-    """Generate noisy logs forever"""
-    while True:
-        r = random.randint(0, 2)
-        if r == 0:
-            print(
-                f"{time.ctime()} DEBUG: heartbeat from awesome-hello-world",
-                file=sys.stderr,
-                flush=True,
-            )
-        elif r == 1:
-            print(
-                f"{time.ctime()} WARN: pretending to have triggered an warning in awesome-hello-world",
-                file=sys.stderr,
-                flush=True,
-            )
-        else:
-            print(
-                f"{time.ctime()} LOG: pretending to log in awesome-hello-world",
-                file=sys.stderr,
-                flush=True,
-            )
-
-        time.sleep(0.5)
+        self.wfile.write("Hello World!".encode("utf-8"))
+
+
+def log_debug():
+    print(
+        f"{time.ctime()} DEBUG: heartbeat",
+        file=sys.stderr,
+        flush=True,
+    )
+
+
+def log_log():
+    print(
+        f"{time.ctime()} LOG: logging something interesting...",
+        file=sys.stderr,
+        flush=True,
+    )
 
 
 if __name__ == "__main__":
     # Start background noisy logger
-    threading.Thread(target=noisy_logger, daemon=True).start()
+    # add some noisy output
+    for _ in range(30):
+        r = random.randint(0, 1)
+        if r == 0:
+            log_debug()
+        if r == 2:
+            log_log()
+
+    try:
+        import socketserver
+
+        with socketserver.TCPServer(("", PORT), HelloHandler) as httpd:
+            # print(f"Serving on port {PORT}, reading from {HELLO_FILE}", flush=True)
+            httpd.serve_forever()
+    except Exception as e:
+        # simulate shutting down
+        print(
+            f"{time.ctime()} ERROR: {e}",
+            file=sys.stderr,
+            flush=True,
+        )
+        print(
+            f"{time.ctime()} STOPPING: shutting down with delay",
+            file=sys.stderr,
+            flush=True,
+        )
+        for _ in range(20):
+            log_debug()
 
-    with socketserver.TCPServer(("", PORT), HelloHandler) as httpd:
-        # print(f"Serving on port {PORT}, reading from {HELLO_FILE}", flush=True)
-        httpd.serve_forever()
+        exit(1)

docs/slides/awesome-hello-world.service

@@ -3,9 +3,11 @@ Description=Awesome Hello World Server
 After=network.target
 
 [Service]
-ExecStart=/opt/hello/serve-hello.py
-ProtectSystem=strict
-ProtectHome=yes
+ExecStart=/opt/hello/awesome-hello-world.py
+DynamicUser=yes
+PrivateTmp=yes
+RestrictAddressFamilies=AF_UNIX AF_INET6
+SystemCallFilter=~@chown @clock @cpu-emulation @privileged
 
 [Install]
 WantedBy=multi-user.target

docs/slides/custom.tape

@@ -0,0 +1,75 @@
+Set TypingSpeed 100ms
+
+Set Shell "fish"
+# Set PlaybackSpeed 0.4
+Set Padding 1
+Set Margin 1
+Set FontSize 16
+Output out.gif
+# Set Width 850
+# Set Height 200
+
+Hide
+Type@10ms `rm ~/.config/isd_tui/config.yaml` Enter
+Type@10ms `ISD_CACHE_INPUT=false ISD_STARTUP_MODE=system ISD_FULL_REFRESH_INTERVAL_SEC=1 my_asciinema rec --overwrite --quiet --window-size 85x27 --command 'fish --private --init-command="set -g fish_autosuggestion_enabled 0"' custom.cast`
+Enter
+
+Sleep 0.5s
+Show
+
+Sleep 1s
+Type "isd" Sleep 0.5s Enter
+Sleep 1s
+Ctrl+N
+Ctrl+P
+Sleep 1s
+Type "config"
+Sleep 1s
+Ctrl+N
+Enter
+Sleep 1s
+Ctrl+N
+Down@50ms 11
+Type "o"
+Type "journal_p" Sleep 1s Tab
+Sleep 3s Enter
+Type "c0" Escape
+Ctrl+N
+Type "i" Backspace
+Type "lnav" Enter
+Sleep 1s
+Type "theme: " Escape
+Sleep 1s
+Ctrl+N
+Type "inord" Enter
+Sleep 1s
+Escape
+Ctrl+N
+Type ":wq" Enter
+
+Sleep 1s
+Ctrl+N
+Sleep 1s
+Ctrl+Q
+Sleep 1s
+Type "isd"
+Ctrl+N
+
+Type "awesome-"
+Sleep 1s
+Tab@100ms 3
+Right Sleep 1s
+Enter
+Sleep 1s
+Ctrl+N
+Sleep 1s
+Type ":filter-in DEBUG"
+Sleep 2s
+Enter
+Sleep 1s
+Ctrl+N
+Sleep 1s
+Type "q"
+
+Ctrl+D
+

docs/slides/dist/theme/night.css

@@ -61,6 +61,18 @@ section.has-light-background h6 {
   --r-code-font: 'CascadiaCodeNF';
 }
 
+q {
+  quotes: "„" "“" "‚" "‘";
+}
+
+q::before {
+  content: open-quote;
+}
+
+q::after {
+  content: close-quote;
+}
+
 .ap-wrapper pre.ap-terminal {
   /* border-width: 0em; */
   padding: 0;
@@ -86,6 +98,10 @@ section.has-light-background h6 {
   height: 100%;
 }
 
+.large {
+  font-size: var(--r-heading2-size);
+}
+
 .vfill::after {
   content: "";
   flex: .2;
@@ -413,4 +429,4 @@ section.has-light-background h6 {
   .backgrounds {
     background-color: var(--r-background-color);
   }
-}
+}

docs/slides/example.md

@@ -0,0 +1,42 @@
+```sh
+
+rm -f /run/systemd/system/awesome-hello-world.service.d/override.conf
+
+# asciinema rec --overwrite --quiet old_workflow.cast
+
+curl localhost:8181
+
+systemctl status awesome-hello-world.service
+
+journalctl -xeu awesome-hello-world.service
+
+journalctl --user -xeu awesome-hello-world.service
+
+journalctl -xeu awesome-hello-world.service
+
+# UP for 10sek
+# q
+
+systemctl edit --runtime awesome-hello-world.service
+
+# ah yeah, requires sudo
+
+sudo systemctl edit --runtime awesome-hello-world.service
+# TYPE:
+# [Service] ENTER
+# RestrictAddressFamilies=AF_UNIX AF_INET6 AF_INET ENTER
+# Ctrl+X
+# Y
+
+curl localhost:8181
+
+# ah yeah, forgot to restart the service
+
+sudo systemctl restart awesome-hello-world.service
+
+curl localhost:8181
+
+
+# rm /run/systemd/system/awesome-hello-world.service.d/override.conf
+
+```