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我正在尝试在运行 archlinux arm 的树莓派 2B 上使用 docker，但 docker 守护进程无法联系 docker 注册表。

docker pull hello-world导致 docker 守护进程输出：

DEBU[2020-07-02T16:47:21.391929909Z] Calling HEAD /_ping
DEBU[2020-07-02T16:47:21.394012289Z] Calling GET /v1.40/info
DEBU[2020-07-02T16:47:21.444644977Z] Calling POST /v1.40/images/create?fromImage=hello-world&tag=latest
DEBU[2020-07-02T16:47:21.445747989Z] Trying to pull hello-world from https://registry-1.docker.io v2
WARN[2020-07-02T16:47:36.446771393Z] Error getting v2 registry: Get "https://registry-1.docker.io/v2/": context deadline exceeded (Client.Timeout exceeded while awaiting headers)
INFO[2020-07-02T16:47:36.447023996Z] Attempting next endpoint for pull after error: Get "https://registry-1.docker.io/v2/": context deadline exceeded (Client.Timeout exceeded while awaiting headers)
ERRO[2020-07-02T16:47:36.447505346Z] Handler for POST /v1.40/images/create returned error: Get "https://registry-1.docker.io/v2/": context deadline exceeded (Client.Timeout exceeded while awaiting headers)

但是，我可以 curl 该地址，curl https://registry-1.docker.io/v2/给出：

{"errors":[{"code":"UNAUTHORIZED","message":"authentication required","detail":null}]}

我也可以挖dig registry-1.docker.io

; <<>> DiG 9.16.4 <<>> registry-1.docker.io
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 54200
;; flags: qr rd ra; QUERY: 1, ANSWER: 8, AUTHORITY: 0, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 512
;; QUESTION SECTION:
;registry-1.docker.io.          IN      A

;; ANSWER SECTION:
registry-1.docker.io.   53      IN      A       52.5.11.128
registry-1.docker.io.   53      IN      A       35.174.73.84
registry-1.docker.io.   53      IN      A       52.72.232.213
registry-1.docker.io.   53      IN      A       52.1.121.53
registry-1.docker.io.   53      IN      A       52.54.232.21
registry-1.docker.io.   53      IN      A       52.4.20.24
registry-1.docker.io.   53      IN      A       54.236.131.166
registry-1.docker.io.   53      IN      A       54.85.107.53

;; Query time: 0 msec
;; SERVER: 8.8.8.8#53(8.8.8.8)
;; WHEN: Thu Jul 02 16:54:59 UTC 2020
;; MSG SIZE  rcvd: 177

我的 daemon.json 是：

{
    "dns": ["8.8.8.8", "8.8.4.4"],
    "debug": true
}

/etc/resolv.conf

# Generated by resolvconf
nameserver 8.8.8.8
nameserver 8.8.4.4

ip链接的输出：

1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN mode DEFAULT group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP mode DEFAULT group default qlen 1000
    link/ether b8:27:eb:e1:df:6c brd ff:ff:ff:ff:ff:ff
3: wlan0: <BROADCAST,MULTICAST> mtu 1500 qdisc fq_codel state DOWN mode DEFAULT group default qlen 1000
    link/ether b8:27:eb:b4:8a:39 brd ff:ff:ff:ff:ff:ff
4: docker0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN mode DEFAULT group default
    link/ether 02:42:2b:be:08:ee brd ff:ff:ff:ff:ff:ff
5: br-35ff30d41af9: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN mode DEFAULT group default
    link/ether 02:42:01:4c:7e:30 brd ff:ff:ff:ff:ff:ff

有任何想法吗？

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