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progress44/delete_orphaned_veth_docker.sh

Forked from daanemanz/delete_orphaned_veth_docker.sh
Created April 13, 2019 09:55
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Revisions

  1. Daniel van den Berg created this gist Sep 14, 2015.
    39 changes: 39 additions & 0 deletions delete_orphaned_veth_docker.sh
    View file
    Original file line number Diff line number Diff line change
    @@ -0,0 +1,39 @@
    #!/bin/bash

    veth_in_use=()
    veth_unused=()
    veth_all=()

    function veth_interface_for_container() {
    local pid=$(docker inspect -f '{{.State.Pid}}' "${1}")
    mkdir -p /var/run/netns
    ln -sf /proc/$pid/ns/net "/var/run/netns/${1}"
    local index=$(ip netns exec "${1}" ip link show eth0 | head -n1 | sed s/:.*//)
    let index=index+1
    ip link show | grep "^${index}:" | sed "s/${index}: \(.*\):.*/\1/"
    rm -f "/var/run/netns/${1}"
    }

    for i in $(docker ps | grep Up | awk '{print $1}')
    do
    if [ "$(veth_interface_for_container $i)" != "docker0" ]
    then
    veth_in_use+=($(veth_interface_for_container $i))
    fi
    done

    for i in $(brctl show | grep veth | awk '{print $(NF)}')
    do
    veth_all+=($i)
    done

    for i in "${veth_all[@]}"
    do
    for j in "${veth_in_use[@]}"
    do
    [[ $i == "$j" ]] && continue 2
    done

    ip link set $i down
    ip link delete $i
    done