mirror of
https://github.com/varun-r-mallya/Python-BPF.git
synced 2025-12-31 21:06:25 +00:00
528 lines
18 KiB
Python
528 lines
18 KiB
Python
"""Terminal User Interface for container monitoring."""
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import time
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import curses
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from typing import Optional, List
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from data_collection import ContainerDataCollector
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class ContainerMonitorTUI:
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"""TUI for container monitoring with cgroup selection and live graphs."""
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def __init__(self, collector: ContainerDataCollector):
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self.collector = collector
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self.selected_cgroup: Optional[int] = None
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self.current_screen = "selection" # "selection" or "monitoring"
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self.selected_index = 0
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self.scroll_offset = 0
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def run(self):
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"""Run the TUI application."""
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curses.wrapper(self._main_loop)
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def _main_loop(self, stdscr):
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"""Main curses loop."""
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# Configure curses
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curses.curs_set(0) # Hide cursor
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stdscr.nodelay(True) # Non-blocking input
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stdscr.timeout(100) # Refresh every 100ms
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# Initialize colors
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curses.start_color()
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curses.init_pair(1, curses.COLOR_CYAN, curses.COLOR_BLACK)
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curses.init_pair(2, curses.COLOR_GREEN, curses.COLOR_BLACK)
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curses.init_pair(3, curses.COLOR_YELLOW, curses.COLOR_BLACK)
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curses.init_pair(4, curses.COLOR_RED, curses.COLOR_BLACK)
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curses.init_pair(5, curses.COLOR_MAGENTA, curses.COLOR_BLACK)
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curses.init_pair(6, curses.COLOR_WHITE, curses.COLOR_BLUE)
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curses.init_pair(7, curses.COLOR_BLUE, curses.COLOR_BLACK)
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curses.init_pair(8, curses.COLOR_WHITE, curses.COLOR_CYAN)
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while True:
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stdscr.clear()
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try:
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if self.current_screen == "selection":
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self._draw_selection_screen(stdscr)
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elif self.current_screen == "monitoring":
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self._draw_monitoring_screen(stdscr)
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stdscr.refresh()
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# Handle input
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key = stdscr.getch()
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if key != -1:
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if not self._handle_input(key):
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break # Exit requested
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except KeyboardInterrupt:
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break
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except Exception as e:
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# Show error
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stdscr.addstr(0, 0, f"Error: {str(e)}")
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stdscr.refresh()
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time.sleep(2)
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def _draw_selection_screen(self, stdscr):
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"""Draw the cgroup selection screen."""
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height, width = stdscr.getmaxyx()
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# Draw fancy header box
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self._draw_fancy_header(
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stdscr, "🐳 CONTAINER MONITOR", "Select a Cgroup to Monitor"
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)
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# Instructions
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instructions = "↑↓: Navigate | ENTER: Select | q: Quit | r: Refresh"
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stdscr.attron(curses.color_pair(3))
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stdscr.addstr(3, (width - len(instructions)) // 2, instructions)
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stdscr.attroff(curses.color_pair(3))
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# Get cgroups
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cgroups = self.collector.get_all_cgroups()
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if not cgroups:
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msg = "No cgroups found. Waiting for activity..."
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stdscr.attron(curses.color_pair(4))
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stdscr.addstr(height // 2, (width - len(msg)) // 2, msg)
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stdscr.attroff(curses.color_pair(4))
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return
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# Sort cgroups by name
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cgroups.sort(key=lambda c: c.name)
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# Adjust selection bounds
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if self.selected_index >= len(cgroups):
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self.selected_index = len(cgroups) - 1
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if self.selected_index < 0:
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self.selected_index = 0
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# Calculate visible range
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list_height = height - 8
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if self.selected_index < self.scroll_offset:
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self.scroll_offset = self.selected_index
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elif self.selected_index >= self.scroll_offset + list_height:
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self.scroll_offset = self.selected_index - list_height + 1
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# Draw cgroup list with fancy borders
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start_y = 5
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stdscr.attron(curses.color_pair(1))
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stdscr.addstr(start_y, 2, "╔" + "═" * (width - 6) + "╗")
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stdscr.attroff(curses.color_pair(1))
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for i in range(list_height):
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idx = self.scroll_offset + i
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y = start_y + 1 + i
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stdscr.attron(curses.color_pair(1))
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stdscr.addstr(y, 2, "║")
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stdscr.addstr(y, width - 3, "║")
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stdscr.attroff(curses.color_pair(1))
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if idx >= len(cgroups):
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continue
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cgroup = cgroups[idx]
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if idx == self.selected_index:
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# Highlight selected with better styling
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stdscr.attron(curses.color_pair(8) | curses.A_BOLD)
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line = f" ► {cgroup.name:<35} │ ID: {cgroup.id} "
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stdscr.addstr(y, 3, line[: width - 6])
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stdscr.attroff(curses.color_pair(8) | curses.A_BOLD)
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else:
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stdscr.attron(curses.color_pair(7))
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line = f" {cgroup.name:<35} │ ID: {cgroup.id} "
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stdscr.addstr(y, 3, line[: width - 6])
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stdscr.attroff(curses.color_pair(7))
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# Bottom border
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bottom_y = start_y + 1 + list_height
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stdscr.attron(curses.color_pair(1))
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stdscr.addstr(bottom_y, 2, "╚" + "═" * (width - 6) + "╝")
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stdscr.attroff(curses.color_pair(1))
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# Footer with count and scroll indicator
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footer = f"Total: {len(cgroups)} cgroups"
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if len(cgroups) > list_height:
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footer += f" │ Showing {self.scroll_offset + 1}-{min(self.scroll_offset + list_height, len(cgroups))}"
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stdscr.attron(curses.color_pair(1))
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stdscr.addstr(height - 2, (width - len(footer)) // 2, footer)
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stdscr.attroff(curses.color_pair(1))
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def _draw_monitoring_screen(self, stdscr):
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"""Draw the monitoring screen for selected cgroup."""
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height, width = stdscr.getmaxyx()
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if self.selected_cgroup is None:
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return
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# Get current stats
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stats = self.collector.get_stats_for_cgroup(self.selected_cgroup)
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history = self.collector.get_history(self.selected_cgroup)
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# Draw fancy header
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self._draw_fancy_header(
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stdscr, f"📊 {stats.cgroup_name}", "Live Performance Metrics"
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)
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# Instructions
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instructions = "ESC/b: Back to List | q: Quit"
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stdscr.attron(curses.color_pair(3))
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stdscr.addstr(3, (width - len(instructions)) // 2, instructions)
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stdscr.attroff(curses.color_pair(3))
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# Calculate metrics for rate display
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rates = self._calculate_rates(history)
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y = 5
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# Syscall count in a fancy box
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self._draw_metric_box(
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stdscr,
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y,
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2,
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width - 4,
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"⚡ SYSTEM CALLS",
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f"{stats.syscall_count:,}",
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f"Rate: {rates['syscalls_per_sec']:.1f}/sec",
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curses.color_pair(5),
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)
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y += 4
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# Network I/O Section
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self._draw_section_header(stdscr, y, "🌐 NETWORK I/O", 1)
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y += 1
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# RX graph with legend
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rx_label = f"RX: {self._format_bytes(stats.rx_bytes)}"
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rx_rate = f"{self._format_bytes(rates['rx_bytes_per_sec'])}/s"
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rx_pkts = f"{stats.rx_packets:,} pkts ({rates['rx_pkts_per_sec']:.1f}/s)"
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self._draw_labeled_graph(
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stdscr,
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y,
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2,
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width - 4,
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4,
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rx_label,
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rx_rate,
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rx_pkts,
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[s.rx_bytes for s in history],
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curses.color_pair(2),
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"Received Traffic (last 100 samples)",
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)
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y += 6
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# TX graph with legend
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tx_label = f"TX: {self._format_bytes(stats.tx_bytes)}"
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tx_rate = f"{self._format_bytes(rates['tx_bytes_per_sec'])}/s"
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tx_pkts = f"{stats.tx_packets:,} pkts ({rates['tx_pkts_per_sec']:.1f}/s)"
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self._draw_labeled_graph(
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stdscr,
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y,
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2,
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width - 4,
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4,
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tx_label,
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tx_rate,
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tx_pkts,
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[s.tx_bytes for s in history],
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curses.color_pair(3),
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"Transmitted Traffic (last 100 samples)",
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)
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y += 6
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# File I/O Section
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self._draw_section_header(stdscr, y, "💾 FILE I/O", 1)
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y += 1
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# Read graph with legend
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read_label = f"READ: {self._format_bytes(stats.read_bytes)}"
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read_rate = f"{self._format_bytes(rates['read_bytes_per_sec'])}/s"
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read_ops = f"{stats.read_ops:,} ops ({rates['read_ops_per_sec']:.1f}/s)"
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self._draw_labeled_graph(
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stdscr,
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y,
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2,
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width - 4,
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4,
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read_label,
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read_rate,
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read_ops,
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[s.read_bytes for s in history],
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curses.color_pair(4),
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"Read Operations (last 100 samples)",
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)
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y += 6
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# Write graph with legend
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write_label = f"WRITE: {self._format_bytes(stats.write_bytes)}"
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write_rate = f"{self._format_bytes(rates['write_bytes_per_sec'])}/s"
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write_ops = f"{stats.write_ops:,} ops ({rates['write_ops_per_sec']:.1f}/s)"
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self._draw_labeled_graph(
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stdscr,
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y,
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2,
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width - 4,
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4,
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write_label,
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write_rate,
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write_ops,
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[s.write_bytes for s in history],
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curses.color_pair(5),
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"Write Operations (last 100 samples)",
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)
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def _draw_fancy_header(self, stdscr, title: str, subtitle: str):
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"""Draw a fancy header with title and subtitle."""
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height, width = stdscr.getmaxyx()
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# Top border
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stdscr.attron(curses.color_pair(6) | curses.A_BOLD)
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stdscr.addstr(0, 0, "═" * width)
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# Title
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stdscr.addstr(0, (width - len(title)) // 2, f" {title} ")
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stdscr.attroff(curses.color_pair(6) | curses.A_BOLD)
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# Subtitle
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stdscr.attron(curses.color_pair(1))
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stdscr.addstr(1, (width - len(subtitle)) // 2, subtitle)
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stdscr.attroff(curses.color_pair(1))
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# Bottom border
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stdscr.attron(curses.color_pair(6))
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stdscr.addstr(2, 0, "═" * width)
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stdscr.attroff(curses.color_pair(6))
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def _draw_metric_box(
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self,
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stdscr,
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y: int,
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x: int,
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width: int,
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label: str,
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value: str,
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detail: str,
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color_pair: int,
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):
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"""Draw a fancy box for displaying a metric."""
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# Top border
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stdscr.attron(color_pair | curses.A_BOLD)
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stdscr.addstr(y, x, "┌" + "─" * (width - 2) + "┐")
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# Label
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stdscr.addstr(y + 1, x, "│")
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stdscr.addstr(y + 1, x + 2, label)
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stdscr.addstr(y + 1, x + width - 1, "│")
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# Value (large)
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stdscr.addstr(y + 2, x, "│")
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stdscr.attroff(color_pair | curses.A_BOLD)
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stdscr.attron(curses.color_pair(2) | curses.A_BOLD)
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stdscr.addstr(y + 2, x + 4, value)
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stdscr.attroff(curses.color_pair(2) | curses.A_BOLD)
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stdscr.attron(color_pair | curses.A_BOLD)
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stdscr.addstr(y + 2, x + width - 1, "│")
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# Detail
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stdscr.addstr(y + 2, x + width - len(detail) - 3, detail)
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# Bottom border
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stdscr.addstr(y + 3, x, "└" + "─" * (width - 2) + "┘")
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stdscr.attroff(color_pair | curses.A_BOLD)
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def _draw_section_header(self, stdscr, y: int, title: str, color_pair: int):
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"""Draw a section header."""
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height, width = stdscr.getmaxyx()
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stdscr.attron(curses.color_pair(color_pair) | curses.A_BOLD)
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stdscr.addstr(y, 2, title)
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stdscr.addstr(y, len(title) + 3, "─" * (width - len(title) - 5))
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stdscr.attroff(curses.color_pair(color_pair) | curses.A_BOLD)
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def _draw_labeled_graph(
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self,
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stdscr,
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y: int,
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x: int,
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width: int,
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height: int,
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label: str,
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rate: str,
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detail: str,
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data: List[float],
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color_pair: int,
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description: str,
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):
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"""Draw a graph with labels and legend."""
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# Header with metrics
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stdscr.attron(curses.color_pair(1) | curses.A_BOLD)
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stdscr.addstr(y, x, label)
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stdscr.attroff(curses.color_pair(1) | curses.A_BOLD)
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stdscr.attron(curses.color_pair(2))
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stdscr.addstr(y, x + len(label) + 2, rate)
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stdscr.attroff(curses.color_pair(2))
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stdscr.attron(curses.color_pair(7))
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stdscr.addstr(y, x + len(label) + len(rate) + 4, detail)
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stdscr.attroff(curses.color_pair(7))
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# Draw the graph
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if len(data) > 1:
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self._draw_bar_graph_enhanced(
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stdscr, y + 1, x, width, height, data, color_pair
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)
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else:
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stdscr.attron(curses.color_pair(7))
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stdscr.addstr(y + 2, x + 2, "Collecting data...")
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stdscr.attroff(curses.color_pair(7))
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# Graph legend at bottom
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stdscr.attron(curses.color_pair(7))
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stdscr.addstr(y + height + 1, x, f"└─ {description}")
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stdscr.attroff(curses.color_pair(7))
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def _draw_bar_graph_enhanced(
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self,
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stdscr,
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y: int,
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x: int,
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width: int,
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height: int,
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data: List[float],
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color_pair: int,
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):
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"""Draw an enhanced bar graph with axis and scale."""
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if not data or width < 2:
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return
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# Calculate statistics
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max_val = max(data) if max(data) > 0 else 1
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min_val = min(data)
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avg_val = sum(data) / len(data)
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# Take last 'width - 10' data points (leave room for Y-axis)
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graph_width = width - 12
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recent_data = data[-graph_width:] if len(data) > graph_width else data
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# Draw Y-axis labels
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stdscr.attron(curses.color_pair(7))
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stdscr.addstr(y, x, f"│{self._format_bytes(max_val):>9}")
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stdscr.addstr(y + height // 2, x, f"│{self._format_bytes(avg_val):>9}")
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stdscr.addstr(y + height - 1, x, f"│{self._format_bytes(min_val):>9}")
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stdscr.attroff(curses.color_pair(7))
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# Draw bars
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for row in range(height):
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threshold = (height - row) / height
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bar_line = ""
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for val in recent_data:
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normalized = val / max_val if max_val > 0 else 0
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if normalized >= threshold:
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bar_line += "█"
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elif normalized >= threshold - 0.15:
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bar_line += "▓"
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elif normalized >= threshold - 0.35:
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bar_line += "▒"
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elif normalized >= threshold - 0.5:
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bar_line += "░"
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else:
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bar_line += " "
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stdscr.attron(color_pair)
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stdscr.addstr(y + row, x + 11, bar_line)
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stdscr.attroff(color_pair)
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# Draw X-axis
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stdscr.attron(curses.color_pair(7))
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stdscr.addstr(y + height, x + 10, "├" + "─" * len(recent_data))
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stdscr.addstr(y + height, x + 10 + len(recent_data), "→ time")
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stdscr.attroff(curses.color_pair(7))
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def _calculate_rates(self, history: List) -> dict:
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"""Calculate per-second rates from history."""
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if len(history) < 2:
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return {
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"syscalls_per_sec": 0.0,
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"rx_bytes_per_sec": 0.0,
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"tx_bytes_per_sec": 0.0,
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"rx_pkts_per_sec": 0.0,
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"tx_pkts_per_sec": 0.0,
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"read_bytes_per_sec": 0.0,
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"write_bytes_per_sec": 0.0,
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"read_ops_per_sec": 0.0,
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"write_ops_per_sec": 0.0,
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}
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# Calculate delta between last two samples
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recent = history[-1]
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previous = history[-2]
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time_delta = recent.timestamp - previous.timestamp
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if time_delta <= 0:
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time_delta = 1.0
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return {
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"syscalls_per_sec": (recent.syscall_count - previous.syscall_count)
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/ time_delta,
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"rx_bytes_per_sec": (recent.rx_bytes - previous.rx_bytes) / time_delta,
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"tx_bytes_per_sec": (recent.tx_bytes - previous.tx_bytes) / time_delta,
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"rx_pkts_per_sec": (recent.rx_packets - previous.rx_packets) / time_delta,
|
|
"tx_pkts_per_sec": (recent.tx_packets - previous.tx_packets) / time_delta,
|
|
"read_bytes_per_sec": (recent.read_bytes - previous.read_bytes)
|
|
/ time_delta,
|
|
"write_bytes_per_sec": (recent.write_bytes - previous.write_bytes)
|
|
/ time_delta,
|
|
"read_ops_per_sec": (recent.read_ops - previous.read_ops) / time_delta,
|
|
"write_ops_per_sec": (recent.write_ops - previous.write_ops) / time_delta,
|
|
}
|
|
|
|
def _format_bytes(self, bytes_val: float) -> str:
|
|
"""Format bytes into human-readable string."""
|
|
if bytes_val < 0:
|
|
bytes_val = 0
|
|
for unit in ["B", "KB", "MB", "GB", "TB"]:
|
|
if bytes_val < 1024.0:
|
|
return f"{bytes_val:.2f}{unit}"
|
|
bytes_val /= 1024.0
|
|
return f"{bytes_val:.2f}PB"
|
|
|
|
def _handle_input(self, key: int) -> bool:
|
|
"""Handle keyboard input. Returns False to exit."""
|
|
if key == ord("q") or key == ord("Q"):
|
|
return False # Exit
|
|
|
|
if self.current_screen == "selection":
|
|
if key == curses.KEY_UP:
|
|
self.selected_index = max(0, self.selected_index - 1)
|
|
elif key == curses.KEY_DOWN:
|
|
cgroups = self.collector.get_all_cgroups()
|
|
self.selected_index = min(len(cgroups) - 1, self.selected_index + 1)
|
|
elif key == ord("\n") or key == curses.KEY_ENTER or key == 10:
|
|
# Select cgroup
|
|
cgroups = self.collector.get_all_cgroups()
|
|
if cgroups and 0 <= self.selected_index < len(cgroups):
|
|
cgroups.sort(key=lambda c: c.name)
|
|
self.selected_cgroup = cgroups[self.selected_index].id
|
|
self.current_screen = "monitoring"
|
|
elif key == ord("r") or key == ord("R"):
|
|
# Force refresh cache
|
|
self.collector._cgroup_cache_time = 0
|
|
|
|
elif self.current_screen == "monitoring":
|
|
if key == 27 or key == ord("b") or key == ord("B"): # ESC or 'b'
|
|
self.current_screen = "selection"
|
|
self.selected_cgroup = None
|
|
|
|
return True # Continue running
|