.. заглавие: Linux Network Namespace & veth Visualizer
.. slug: linux-namespace-visualizer
.. дата: 2026-03-27 12:00:00 UTC
.. тагове: linux, мрежово пространство от имена, veth, контейнер, sysadmin, калкулатор, инструмент
.. категория: Калкулатори
.. връзка:
.. описание: Поставете ip netns списък, ip link show и ip addr show изход, за да изобразите топологична диаграма на Linux мрежови пространства от имена, veth двойки, мостове и IP назначения.
.. тип: текст
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<div class="calc-container">
<div class="calc-header">
<h2>Linux Network Namespace &amp; veth Visualizer</h2>
<p>Поставете произволна комбинация от команден изход — всички полета не са задължителни.</p>
<div class="textarea-grid">
<div class="input-group">
<label>ip netns списък (по избор)</label>
<textarea id="nsInput" placeholder="default
ns1
ns2" rows="4"></textarea>
</div>
<div class="input-group">
<label>показване на ip връзка</label>
<textarea id="linkInput" placeholder="1: lo: …
2: eth0: …" rows="4"></textarea>
</div>
<div class="input-group">
<label>показване на IP адрес (по избор)</label>
<textarea id="addrInput" placeholder="2: eth0: …
    inet 192.168.1.1/24 …" rows="4"></textarea>
</div>
</div>
<div class="button-container">
<button class="calc-button" onclick="render()">Топология на изобразяване</button>
<button class="calc-button secondary" onclick="loadSample()">Заредете проба</button>
<button class="calc-button secondary" onclick="clearAll()">ясно</button>
</div>
</div>
<div class="result-section" id="cySection" style="display:none">
<div class="section-header">Топология на пространството от имена</div>
<div class="section-content" style="padding:12px">
<div class="legend">
<div class="legend-item"><div class="legend-dot" style="background:#0a3d62"></div>Пространство от имена</div>
<div class="legend-item"><div class="legend-dot" style="background:#4facfe"></div>veth интерфейс</div>
<div class="legend-item"><div class="legend-dot" style="background:#f7971e"></div>Мост</div>
<div class="legend-item"><div class="legend-dot" style="background:#28a745"></div>Пространство от имена по подразбиране</div>
<div class="legend-item"><div class="legend-line" style="background:#555"></div>veth двойка връзка</div>
</div>
<div id="cy"></div>
<div class="detail-panel" id="detailPanel">Щракнете върху възел, за да видите подробности.</div>
</div>
</div>
</div>
<script src="https://cdnjs.cloudflare.com/ajax/libs/cytoscape/3.26.0/cytoscape.min.js"></script>
<script>
let cyInst = null;

function parseNetns(text) {
    const ns = ['root'];
    text.split('\n').forEach(line => {
        const m = line.match(/^(\S+)/);
        if (m && m[1]) ns.push(m[1]);
    });
    return [...new Set(ns)];
}

function parseLinks(text) {
    const links = [];
    text.split('\n').forEach(line => {
        // Match: N: name@peer: or N: name:
        const m = line.match(/^\d+:\s+([a-zA-Z0-9_.-]+)(?:@([a-zA-Z0-9_.-]+))?:/);
        if (m) {
            const [, name, peer] = m;
            const type = name.startsWith('br') ? 'bridge'
                : peer ? 'veth'
                : name === 'lo' ? 'lo'
                : 'eth';
            links.push({ name, peer: peer || null, type });
        }
    });
    return links;
}

function parseAddrs(text) {
    const addrs = {};
    let current = null;
    text.split('\n').forEach(line => {
        const ifMatch = line.match(/^\d+:\s+([a-zA-Z0-9_.-]+)(?:@\S+)?:/);
        if (ifMatch) { current = ifMatch[1]; addrs[current] = addrs[current] || []; }
        const ipMatch = line.match(/inet\s+(\d+\.\d+\.\d+\.\d+\/\d+)/);
        if (ipMatch && current) addrs[current].push(ipMatch[1]);
    });
    return addrs;
}

function render() {
    const nsText = document.getElementById('nsInput').value;
    const linkText = document.getElementById('linkInput').value;
    const addrText = document.getElementById('addrInput').value;

    const namespaces = parseNetns(nsText);
    const links = parseLinks(linkText);
    const addrs = parseAddrs(addrText);

    const elements = [];

    // Namespace nodes
    namespaces.forEach(ns => {
        elements.push({ data: { id: `ns_${ns}`, label: ns === 'root' ? 'root\nnamespace' : ns, type: 'ns', ns } });
    });

    // Interface nodes and veth pair edges
    const seenPairs = new Set();
    links.filter(l => l.type !== 'lo').forEach(l => {
        const iface = l.name;
        const ip = (addrs[iface] || []).join('\n') || '';
        const type = l.type;
        elements.push({ data: { id: `if_${iface}`, label: iface + (ip ? '\n' + ip : ''), type, ip } });

        // Connect interface to root namespace
        elements.push({ data: { id: `ns_root-${iface}`, source: 'ns_root', target: `if_${iface}` } });

        // veth pair edge
        if (l.peer && !seenPairs.has(`${l.peer}-${iface}`)) {
            seenPairs.add(`${iface}-${l.peer}`);
            elements.push({ data: { id: `veth_${iface}_${l.peer}`, source: `if_${iface}`, target: `if_${l.peer}`, type: 'veth-pair' } });
        }
    });

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    if (cyInst) { cyInst.destroy(); cyInst = null; }

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        container: document.getElementById('cy'),
        elements,
        style: [
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                'width': 90, 'height': 50,
                'background-color': '#f7971e', 'color': '#fff',
                'font-size': 11, 'text-valign': 'center', 'text-halign': 'center',
            }},
            { selector: 'node[type="eth"]', style: {
                'label': 'data(label)', 'text-wrap': 'wrap',
                'shape': 'roundrectangle', 'width': 100, 'height': 40,
                'background-color': '#6c757d', 'color': '#fff',
                'font-size': 10, 'text-valign': 'center', 'text-halign': 'center',
            }},
            { selector: 'edge', style: {
                'curve-style': 'bezier', 'line-color': '#555', 'width': 2,
                'target-arrow-shape': 'none',
            }},
            { selector: 'edge[type="veth-pair"]', style: {
                'line-color': '#4facfe', 'width': 3, 'line-style': 'dashed',
            }},
            { selector: 'node:selected', style: { 'border-width': 3, 'border-color': '#ffd200' }},
        ],
        layout: { name: 'cose', padding: 30 },
        userZoomingEnabled: true,
    });

    cyInst.on('tap', 'node', evt => {
        const d = evt.target.data();
        let html = `<strong>${d.label.replace(/\n/g, ' / ')}</strong><br>Type: ${d.type}`;
        if (d.ip) html += `<br>IPs: ${d.ip}`;
        document.getElementById('detailPanel').innerHTML = html;
    });
}

function loadSample() {
    document.getElementById('nsInput').value = 'red (id: 0)\nblue (id: 1)';
    document.getElementById('linkInput').value =
`1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500
3: veth-red@veth-red-peer: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500
4: veth-red-peer@veth-red: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500
5: veth-blue@veth-blue-peer: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500
6: veth-blue-peer@veth-blue: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500
7: br0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500`;
    document.getElementById('addrInput').value =
`3: veth-red@veth-red-peer: <BROADCAST>
    inet 10.0.1.1/24 scope global veth-red
4: veth-red-peer@veth-red: <BROADCAST>
    inet 10.0.1.2/24 scope global veth-red-peer
5: veth-blue@veth-blue-peer: <BROADCAST>
    inet 10.0.2.1/24 scope global veth-blue
6: veth-blue-peer@veth-blue: <BROADCAST>
    inet 10.0.2.2/24 scope global veth-blue-peer`;
    render();
}

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}
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