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dxdydz
V2EX  ›  Kubernetes

svclb pod 的 lb-tcp-443 容器启动找不到 iptables 命令

  •  
  •   dxdydz · 146 天前 · 1010 次点击
    这是一个创建于 146 天前的主题,其中的信息可能已经有所发展或是发生改变。

    scclb event 概括:Back-off restarting failed container lb-tcp-443 in pod svclb-traefik-e91c51d8-5vt7w_kube-system(2a842b27-2c1f-42d7-b24a-2504dfdde6a7)

    使用kubectl logs svclb-traefik-e91c51d8-5vt7w -n kube-system -c lb-tcp-443,输出如下:

    + trap exit TERM INT
    + BIN_DIR=/sbin
    + check_iptables_mode
    + set +e
    + lsmod
    + grep nf_tables
    + '[' 1 '=' 0 ]
    + mode=legacy
    + set -e
    + info 'legacy mode detected'
    + echo '[INFO] ' 'legacy mode detected'
    [INFO]  legacy mode detected
    + set_legacy
    + ln -sf /sbin/xtables-legacy-multi /sbin/iptables
    + ln -sf /sbin/xtables-legacy-multi /sbin/iptables-save
    + ln -sf /sbin/xtables-legacy-multi /sbin/iptables-restore
    + ln -sf /sbin/xtables-legacy-multi /sbin/ip6tables
    + start_proxy
    + echo 0.0.0.0/0
    + grep -Eq :
    + iptables -t filter -I FORWARD -s 0.0.0.0/0 -p TCP --dport 443 -j ACCEPT
    /usr/bin/entry: line 46: iptables: not found
    

    系统日志如下:

    Jul 07 09:45:10 ArchVF2 k3s[505]: I0707 09:45:10.681870     505 scope.go:115] "RemoveContainer" containerID="3571d6d9336cdea67e4d6b4da173b5f519e5c1e48aa141d6cf40489eb8a6fc0e"
    Jul 07 09:45:10 ArchVF2 k3s[505]: I0707 09:45:10.682112     505 scope.go:115] "RemoveContainer" containerID="df5231ece32ced969d38c5687d3559384c6791c65a2f484e1e84863e6d15efa9"
    Jul 07 09:45:10 ArchVF2 k3s[505]: E0707 09:45:10.687671     505 pod_workers.go:1294] "Error syncing pod, skipping" err="[failed to \"StartContainer\" for \"lb-tcp-80\" with CrashLoopBackOff: \"back-off 5m0s restarting failed container=lb-tcp-80 pod=svclb-traefik-e91c51d8-5vt7w_kube-system(2a842b27-2c1f-42d7-b24a-2504dfdde6a7)\", failed to \"StartContainer\" for \"lb-tcp-443\" with CrashLoopBackOff: \"back-off 5m0s restarting failed container=lb-tcp-443 pod=svclb-traefik-e91c51d8-5vt7w_kube-system(2a842b27-2c1f-42d7-b24a-2504dfdde6a7)\"]" pod="kube-system/svclb-traefik-e91c51d8-5vt7w" podUID=2a842b27-2c1f-42d7-b24a-2504dfdde6a7
    Jul 07 09:45:14 ArchVF2 k3s[505]: I0707 09:45:14.448587     505 handler.go:232] Adding GroupVersion traefik.containo.us v1alpha1 to ResourceManager
    Jul 07 09:45:14 ArchVF2 k3s[505]: I0707 09:45:14.448982     505 handler.go:232] Adding GroupVersion traefik.containo.us v1alpha1 to ResourceManager
    Jul 07 09:45:14 ArchVF2 k3s[505]: I0707 09:45:14.451023     505 handler.go:232] Adding GroupVersion k3s.cattle.io v1 to ResourceManager
    Jul 07 09:45:14 ArchVF2 k3s[505]: I0707 09:45:14.452731     505 handler.go:232] Adding GroupVersion traefik.containo.us v1alpha1 to ResourceManager
    Jul 07 09:45:14 ArchVF2 k3s[505]: I0707 09:45:14.454400     505 handler.go:232] Adding GroupVersion traefik.containo.us v1alpha1 to ResourceManager
    Jul 07 09:45:14 ArchVF2 k3s[505]: I0707 09:45:14.454759     505 handler.go:232] Adding GroupVersion traefik.containo.us v1alpha1 to ResourceManager
    Jul 07 09:45:14 ArchVF2 k3s[505]: I0707 09:45:14.454992     505 handler.go:232] Adding GroupVersion helm.cattle.io v1 to ResourceManager
    Jul 07 09:45:14 ArchVF2 k3s[505]: I0707 09:45:14.455554     505 handler.go:232] Adding GroupVersion helm.cattle.io v1 to ResourceManager
    Jul 07 09:45:14 ArchVF2 k3s[505]: I0707 09:45:14.455838     505 handler.go:232] Adding GroupVersion traefik.containo.us v1alpha1 to ResourceManager
    Jul 07 09:45:14 ArchVF2 k3s[505]: I0707 09:45:14.456597     505 handler.go:232] Adding GroupVersion traefik.containo.us v1alpha1 to ResourceManager
    Jul 07 09:45:22 ArchVF2 k3s[505]: W0707 09:45:22.768545     505 sysinfo.go:203] Nodes topology is not available, providing CPU topology
    Jul 07 09:45:22 ArchVF2 k3s[505]: W0707 09:45:22.770967     505 machine.go:65] Cannot read vendor id correctly, set empty.
    Jul 07 09:45:23 ArchVF2 k3s[505]: I0707 09:45:23.681533     505 scope.go:115] "RemoveContainer" containerID="3571d6d9336cdea67e4d6b4da173b5f519e5c1e48aa141d6cf40489eb8a6fc0e"
    Jul 07 09:45:23 ArchVF2 k3s[505]: I0707 09:45:23.681782     505 scope.go:115] "RemoveContainer" containerID="df5231ece32ced969d38c5687d3559384c6791c65a2f484e1e84863e6d15efa9"
    Jul 07 09:45:23 ArchVF2 k3s[505]: E0707 09:45:23.687267     505 pod_workers.go:1294] "Error syncing pod, skipping" err="[failed to \"StartContainer\" for \"lb-tcp-80\" with CrashLoopBackOff: \"back-off 5m0s restarting failed container=lb-tcp-80 pod=svclb-traefik-e91c51d8-5vt7w_kube-system(2a842b27-2c1f-42d7-b24a-2504dfdde6a7)\", failed to \"StartContainer\" for \"lb-tcp-443\" with CrashLoopBackOff: \"back-off 5m0s restarting failed container=lb-tcp-443 pod=svclb-traefik-e91c51d8-5vt7w_kube-system(2a842b27-2c1f-42d7-b24a-2504dfdde6a7)\"]" pod="kube-system/svclb-traefik-e91c51d8-5vt7w" podUID=2a842b27-2c1f-42d7-b24a-2504dfdde6a7
    

    补充,查找资料后提示似乎是宿主机iptablesiptables-nft内核模块问题,lsmod输出如下:

    Module                  Size  Used by
    veth                   45056  0
    nft_log                12288  5
    nft_limit              16384  5
    xt_limit               12288  0
    xt_NFLOG               12288  0
    nfnetlink_log          28672  5
    xt_physdev             12288  10
    xt_comment             12288  172
    ip_set                 61440  0
    vxlan                 167936  0
    nft_chain_nat          12288  6
    nf_conntrack_netlink    65536  0
    xt_addrtype            12288  13
    tun                    86016  4
    overlay               217088  9
    8188eu               1658880  0
    rtl8xxxu              270336  0
    mac80211             1032192  1 rtl8xxxu
    dwmac_starfive         12288  0
    cfg80211              638976  2 mac80211,rtl8xxxu
    stmmac_platform        28672  1 dwmac_starfive
    stmmac                421888  4 dwmac_starfive,stmmac_platform
    rfkill                 40960  3 cfg80211
    vfat                   28672  1
    pcs_xpcs               24576  1 stmmac
    evdev                  32768  1
    libarc4                12288  1 mac80211
    fat                   122880  1 vfat
    phylink                69632  2 stmmac,pcs_xpcs
    ptp                    36864  1 stmmac
    wave5                 147456  0
    pps_core               24576  1 ptp
    v4l2_mem2mem           36864  1 wave5
    axp20x_pek             16384  0
    imx708                 28672  0
    goodix_ts              40960  0
    designware_i2s         36864  2
    sch_fq_codel           24576  5
    br_netfilter           40960  0
    bridge                442368  1 br_netfilter
    stp                    12288  1 bridge
    llc                    16384  2 bridge,stp
    dm_mod                212992  0
    zram                   53248  2
    
    3 条回复    2024-07-07 16:40:08 +08:00
    julyclyde
        1
    julyclyde  
       145 天前
    不是缺命令吗?你咋会联想到模块去的?
    guanzhangzhang
        2
    guanzhangzhang  
       145 天前
    1. 手动 docker run 下 image 看下有没有 iptables 命令,还是 PATH env 问题
    2. 你自己做的镜像还是官方的,skopeo list-tags 看看新版本
    dxdydz
        3
    dxdydz  
    OP
       145 天前
    @guanzhangzhang 看到了:
    # cat /usr/bin/entry
    #!/bin/sh
    set -ex

    trap exit TERM INT

    BIN_DIR="/sbin"

    info()
    {
    echo '[INFO] ' "$@"
    }
    fatal()
    {
    echo '[ERROR] ' "$@" >&2
    exit 1
    }

    check_iptables_mode() {
    set +e
    lsmod | grep "nf_tables" 2> /dev/null
    if [ $? = 0 ]; then
    mode=nft
    else
    mode=legacy
    fi
    set -e
    }

    set_nft() {
    for i in iptables iptables-save iptables-restore ip6tables; do
    ln -sf /sbin/xtables-nft-multi "$BIN_DIR/$i";
    done
    }

    set_legacy() {
    for i in iptables iptables-save iptables-restore ip6tables; do
    ln -sf /sbin/xtables-legacy-multi "$BIN_DIR/$i";
    done
    }

    start_proxy() {
    for src_range in ${SRC_RANGES}; do
    if echo ${src_range} | grep -Eq ":"; then
    ip6tables -t filter -I FORWARD -s ${src_range} -p ${DEST_PROTO} --dport ${DEST_PORT} -j ACCEPT
    else
    iptables -t filter -I FORWARD -s ${src_range} -p ${DEST_PROTO} --dport ${DEST_PORT} -j ACCEPT
    fi
    done

    for dest_ip in ${DEST_IPS}; do
    if echo ${dest_ip} | grep -Eq ":"; then
    [ $(cat /proc/sys/net/ipv6/conf/all/forwarding) == 1 ] || exit 1
    ip6tables -t filter -A FORWARD -d ${dest_ip}/128 -p ${DEST_PROTO} --dport ${DEST_PORT} -j DROP
    ip6tables -t nat -I PREROUTING -p ${DEST_PROTO} --dport ${SRC_PORT} -j DNAT --to [${dest_ip}]:${DEST_PORT}
    ip6tables -t nat -I POSTROUTING -d ${dest_ip}/128 -p ${DEST_PROTO} -j MASQUERADE
    else
    [ $(cat /proc/sys/net/ipv4/ip_forward) == 1 ] || exit 1
    iptables -t filter -A FORWARD -d ${dest_ip}/32 -p ${DEST_PROTO} --dport ${DEST_PORT} -j DROP
    iptables -t nat -I PREROUTING -p ${DEST_PROTO} --dport ${SRC_PORT} -j DNAT --to ${dest_ip}:${DEST_PORT}
    iptables -t nat -I POSTROUTING -d ${dest_ip}/32 -p ${DEST_PROTO} -j MASQUERADE
    fi
    done
    }

    check_iptables_mode
    case $mode in
    nft)
    info "nft mode detected"
    set_nft
    ;;
    legacy)
    info "legacy mode detected"
    set_legacy
    ;;
    *)
    fatal "invalid iptables mode"
    ;;
    esac
    start_proxy

    if [ ! -e /pause ]; then
    mkfifo /pause
    fi
    </pause
    / # cat /usr/bin/entry
    #!/bin/sh
    set -ex

    trap exit TERM INT

    BIN_DIR="/sbin"

    info()
    {
    echo '[INFO] ' "$@"
    }
    fatal()
    {
    echo '[ERROR] ' "$@" >&2
    exit 1
    }

    check_iptables_mode() {
    set +e
    lsmod | grep "nf_tables" 2> /dev/null
    if [ $? = 0 ]; then
    mode=nft
    else
    mode=legacy
    fi
    set -e
    }

    set_nft() {
    for i in iptables iptables-save iptables-restore ip6tables; do
    ln -sf /sbin/xtables-nft-multi "$BIN_DIR/$i";
    done
    }

    set_legacy() {
    for i in iptables iptables-save iptables-restore ip6tables; do
    ln -sf /sbin/xtables-legacy-multi "$BIN_DIR/$i";
    done
    }

    start_proxy() {
    for src_range in ${SRC_RANGES}; do
    if echo ${src_range} | grep -Eq ":"; then
    ip6tables -t filter -I FORWARD -s ${src_range} -p ${DEST_PROTO} --dport ${DEST_PORT} -j ACCEPT
    else
    iptables -t filter -I FORWARD -s ${src_range} -p ${DEST_PROTO} --dport ${DEST_PORT} -j ACCEPT
    fi
    done

    for dest_ip in ${DEST_IPS}; do
    if echo ${dest_ip} | grep -Eq ":"; then
    [ $(cat /proc/sys/net/ipv6/conf/all/forwarding) == 1 ] || exit 1
    ip6tables -t filter -A FORWARD -d ${dest_ip}/128 -p ${DEST_PROTO} --dport ${DEST_PORT} -j DROP
    ip6tables -t nat -I PREROUTING -p ${DEST_PROTO} --dport ${SRC_PORT} -j DNAT --to [${dest_ip}]:${DEST_PORT}
    ip6tables -t nat -I POSTROUTING -d ${dest_ip}/128 -p ${DEST_PROTO} -j MASQUERADE
    else
    [ $(cat /proc/sys/net/ipv4/ip_forward) == 1 ] || exit 1
    iptables -t filter -A FORWARD -d ${dest_ip}/32 -p ${DEST_PROTO} --dport ${DEST_PORT} -j DROP
    iptables -t nat -I PREROUTING -p ${DEST_PROTO} --dport ${SRC_PORT} -j DNAT --to ${dest_ip}:${DEST_PORT}
    iptables -t nat -I POSTROUTING -d ${dest_ip}/32 -p ${DEST_PROTO} -j MASQUERADE
    fi
    done
    }

    check_iptables_mode
    case $mode in
    nft)
    info "nft mode detected"
    set_nft
    ;;
    legacy)
    info "legacy mode detected"
    set_legacy
    ;;
    *)
    fatal "invalid iptables mode"
    ;;
    esac
    start_proxy

    if [ ! -e /pause ]; then
    mkfifo /pause
    fi
    </pause

    / # ls /sbin/xtables-nft-multi
    /sbin/xtables-nft-multi
    / # ls /sbin/iptables
    /sbin/iptables
    / # ls /sbin/xtables-legacy-multi
    ls: /sbin/xtables-legacy-multi: No such file or directory
    我大概知道怎么改了,感谢你
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