前言
k8s从1.24开始，删除了对 Docker（Dockershim）的容器运行时接口（CRI）的支持。作者在搭建1.28版本k8s集群时遇到同样的问题，无法从国外镜像源下载k8s核心依赖组件，故写这篇文章
Containerd版本和系统环境
系统环境
Ubuntu20.04 LTS + Containerd 1.6.24
root@master:/home/guanwu# cat /proc/version
Linux version 6.2.0-37-generic (buildd@bos03-amd64-055) (x86_64-linux-gnu-gcc-11 (Ubuntu 11.4.0-1ubuntu1~22.04) 11.4.0, GNU ld (GNU Binutils for Ubuntu) 2.38) #38~22.04.1-Ubuntu SMP PREEMPT_DYNAMIC Thu Nov 2 18:01:13 UTC 2
root@master:/home/guanwu# crictl version
Version: 0.1.0
RuntimeName: containerd
RuntimeVersion: 1.6.24
RuntimeApiVersion: v1
Containerd镜像配置方式
Containerd 默认配置文件路径是 /etc/containerd/config.toml
Containerd配置文件详情可以参考官方文档，请选择对应版本，这里坑比较多，不再细说，1.6.24版本点击我跳转
配置镜像加速可以修改如下配置，这是官方文档的一个说明:
# Config file is parsed as version 1 by default.
# To use the long form of plugin names set "version = 2"
# explicitly use v2 config format
version = 2
[plugins."io.containerd.grpc.v1.cri".registry.mirrors]
[plugins."io.containerd.grpc.v1.cri".registry.mirrors."docker.io"]
endpoint = ["https://registry-1.docker.io"]
[plugins."io.containerd.grpc.v1.cri".registry.mirrors."test.https-registry.io"]
endpoint = ["https://HostIP1:Port1"]
[plugins."io.containerd.grpc.v1.cri".registry.mirrors."test.http-registry.io"]
endpoint = ["http://HostIP2:Port2"]
# wildcard matching is supported but not required.
[plugins."io.containerd.grpc.v1.cri".registry.mirrors."*"]
endpoint = ["https://HostIP3:Port3"]
以下是我个人配置文件
[plugins."io.containerd.grpc.v1.cri".registry]
[plugins."io.containerd.grpc.v1.cri".registry.auths]
[plugins."io.containerd.grpc.v1.cri".registry.configs]
[plugins."io.containerd.grpc.v1.cri".registry.headers]
[plugins."io.containerd.grpc.v1.cri".registry.mirrors] #主要在这下面配置镜像加速服务
[plugins."io.containerd.grpc.v1.cri".registry.mirrors."docker.io"]
endpoint=["https://registry-1.docker.io", "https://xxx.mirror.aliyuncs.com"]
[plugins."io.containerd.grpc.v1.cri".registry.mirrors."registry.k8s.io"]
endpoint=["https://xxx.mirror.aliyuncs.com", "https://k8s.m.daocloud.io", "https://docker.mirrors.ustc.edu.cn","https://hub-mirror.c.163.com"]
镜像加速可以选择国内的多个加速源，比如我这里regitry.k8s.io仓库配置了多个加速源，这是因为如果某个加速源获取不到镜像会自动从下一个获取。
阿里云加速源xxx.mirror.aliyuncs.com
需要登录阿里云网站获取，具体可以参考这里获取help.aliyun.com/zh/acr/user…
具体看下图
验证
输入如下命令
root@master:/etc/containerd# crictl info
可以看到如下输出:
"registry": {
"configPath": "",
"mirrors": {
"docker.io": {
"endpoint": [
"https://registry-1.docker.io",
"https://45hrqeao.mirror.aliyuncs.com"
]
},
"registry.k8s.io": {
"endpoint": [
"https://45hrqeao.mirror.aliyuncs.com",
"https://k8s.m.daocloud.io",
"https://docker.mirrors.ustc.edu.cn",
"https://hub-mirror.c.163.com"
]
}
},
拉取镜像验证
root@master:/etc/containerd# crictl --debug=true pull nginx:1.9.3
DEBU[0000] get image connection
DEBU[0000] PullImageRequest: &PullImageRequest{Image:&ImageSpec{Image:nginx:1.9.3,Annotations:map[string]string{},},Auth:nil,SandboxConfig:nil,}
DEBU[0038] PullImageResponse: &PullImageResponse{ImageRef:sha256:f600a45bb5324a547c56459757824a60fc90b57da638228dd4d247b60ef2f201,}
Image is up to date for sha256:f600a45bb5324a547c56459757824a60fc90b57da638228dd4d247b60ef2f201
root@master:/etc/containerd# crictl image list
IMAGE TAG IMAGE ID SIZE
docker.io/library/nginx 1.9.3
root@master:/etc/containerd# crictl pull registry.k8s.io/coredns:1.6.7
Image is up to date for sha256:67da37a9a360e600e74464da48437257b00a754c77c40f60c65e4cb327c34bd5
root@master:/etc/containerd# crictl image list
IMAGE TAG IMAGE ID SIZE
registry.k8s.io/coredns 1.6.7 67da37a9a360e 13.6MB
root@master:/etc/containerd#
完整配置
disabled_plugins = []
imports = []
oom_score = 0
plugin_dir = ""
required_plugins = []
root = "/var/lib/containerd"
state = "/run/containerd"
temp = ""
version = 2
[cgroup]
path = ""
[debug]
address = ""
format = ""
gid = 0
level = ""
uid = 0
[grpc]
address = "/run/containerd/containerd.sock"
gid = 0
max_recv_message_size = 16777216
max_send_message_size = 16777216
tcp_address = ""
tcp_tls_ca = ""
tcp_tls_cert = ""
tcp_tls_key = ""
uid = 0
[metrics]
address = ""
grpc_histogram = false
[plugins]
[plugins."io.containerd.gc.v1.scheduler"]
deletion_threshold = 0
mutation_threshold = 100
pause_threshold = 0.02
schedule_delay = "0s"
startup_delay = "100ms"
[plugins."io.containerd.grpc.v1.cri"]
device_ownership_from_security_context = false
disable_apparmor = false
disable_cgroup = false
disable_hugetlb_controller = true
disable_proc_mount = false
disable_tcp_service = true
enable_selinux = false
enable_tls_streaming = false
enable_unprivileged_icmp = false
enable_unprivileged_ports = false
ignore_image_defined_volumes = false
max_concurrent_downloads = 3
max_container_log_line_size = 16384
netns_mounts_under_state_dir = false
restrict_oom_score_adj = false
sandbox_image = "registry.aliyuncs.com/google_containers/pause:3.9"
selinux_category_range = 1024
stats_collect_period = 10
stream_idle_timeout = "4h0m0s"
stream_server_address = "127.0.0.1"
stream_server_port = "0"
systemd_cgroup = false
tolerate_missing_hugetlb_controller = true
unset_seccomp_profile = ""
[plugins."io.containerd.grpc.v1.cri".cni]
bin_dir = "/opt/cni/bin"
conf_dir = "/etc/cni/net.d"
conf_template = ""
ip_pref = ""
max_conf_num = 1
[plugins."io.containerd.grpc.v1.cri".containerd]
default_runtime_name = "runc"
disable_snapshot_annotations = true
discard_unpacked_layers = false
ignore_rdt_not_enabled_errors = false
no_pivot = false
snapshotter = "overlayfs"
[plugins."io.containerd.grpc.v1.cri".containerd.default_runtime]
base_runtime_spec = ""
cni_conf_dir = ""
cni_max_conf_num = 0
container_annotations = []
pod_annotations = []
privileged_without_host_devices = false
runtime_engine = ""
runtime_path = ""
runtime_root = ""
runtime_type = ""
[plugins."io.containerd.grpc.v1.cri".containerd.default_runtime.options]
[plugins."io.containerd.grpc.v1.cri".containerd.runtimes]
[plugins."io.containerd.grpc.v1.cri".containerd.runtimes.runc]
base_runtime_spec = ""
cni_conf_dir = ""
cni_max_conf_num = 0
container_annotations = []
pod_annotations = []
privileged_without_host_devices = false
runtime_engine = ""
runtime_path = ""
runtime_root = ""
runtime_type = "io.containerd.runc.v2"
[plugins."io.containerd.grpc.v1.cri".containerd.runtimes.runc.options]
BinaryName = ""
CriuImagePath = ""
CriuPath = ""
CriuWorkPath = ""
IoGid = 0
IoUid = 0
NoNewKeyring = false
NoPivotRoot = false
Root = ""
ShimCgroup = ""
SystemdCgroup = true
[plugins."io.containerd.grpc.v1.cri".containerd.untrusted_workload_runtime]
base_runtime_spec = ""
cni_conf_dir = ""
cni_max_conf_num = 0
container_annotations = []
pod_annotations = []
privileged_without_host_devices = false
runtime_engine = ""
runtime_path = ""
runtime_root = ""
runtime_type = ""
[plugins."io.containerd.grpc.v1.cri".containerd.untrusted_workload_runtime.options]
[plugins."io.containerd.grpc.v1.cri".image_decryption]
key_model = "node"
[plugins."io.containerd.grpc.v1.cri".registry]
[plugins."io.containerd.grpc.v1.cri".registry.auths]
[plugins."io.containerd.grpc.v1.cri".registry.configs]
[plugins."io.containerd.grpc.v1.cri".registry.headers]
[plugins."io.containerd.grpc.v1.cri".registry.mirrors]
[plugins."io.containerd.grpc.v1.cri".registry.mirrors."docker.io"]
endpoint=["https://registry-1.docker.io", "https://45hrqeao.mirror.aliyuncs.com"]
[plugins."io.containerd.grpc.v1.cri".registry.mirrors."registry.k8s.io"]
endpoint=["https://45hrqeao.mirror.aliyuncs.com", "https://k8s.m.daocloud.io", "https://docker.mirrors.ustc.edu.cn","https://hub-mirror.c.163.com"]
[plugins."io.containerd.grpc.v1.cri".x509_key_pair_streaming]
tls_cert_file = ""
tls_key_file = ""
[plugins."io.containerd.internal.v1.opt"]
path = "/opt/containerd"
[plugins."io.containerd.internal.v1.restart"]
interval = "10s"
[plugins."io.containerd.internal.v1.tracing"]
sampling_ratio = 1.0
service_name = "containerd"
[plugins."io.containerd.metadata.v1.bolt"]
content_sharing_policy = "shared"
[plugins."io.containerd.monitor.v1.cgroups"]
no_prometheus = false
[plugins."io.containerd.runtime.v1.linux"]
no_shim = false
runtime = "runc"
runtime_root = ""
shim = "containerd-shim"
shim_debug = false
[plugins."io.containerd.runtime.v2.task"]
platforms = ["linux/amd64"]
sched_core = false
[plugins."io.containerd.service.v1.diff-service"]
default = ["walking"]
[plugins."io.containerd.service.v1.tasks-service"]
rdt_config_file = ""
[plugins."io.containerd.snapshotter.v1.aufs"]
root_path = ""
[plugins."io.containerd.snapshotter.v1.btrfs"]
root_path = ""
[plugins."io.containerd.snapshotter.v1.devmapper"]
async_remove = false
base_image_size = ""
discard_blocks = false
fs_options = ""
fs_type = ""
pool_name = ""
root_path = ""
[plugins."io.containerd.snapshotter.v1.native"]
root_path = ""
[plugins."io.containerd.snapshotter.v1.overlayfs"]
mount_options = []
root_path = ""
sync_remove = false
upperdir_label = false
[plugins."io.containerd.snapshotter.v1.zfs"]
root_path = ""
[plugins."io.containerd.tracing.processor.v1.otlp"]
endpoint = ""
insecure = false
protocol = ""
[proxy_plugins]
[stream_processors]
[stream_processors."io.containerd.ocicrypt.decoder.v1.tar"]
accepts = ["application/vnd.oci.image.layer.v1.tar+encrypted"]
args = ["--decryption-keys-path", "/etc/containerd/ocicrypt/keys"]
env = ["OCICRYPT_KEYPROVIDER_CONFIG=/etc/containerd/ocicrypt/ocicrypt_keyprovider.conf"]
path = "ctd-decoder"
returns = "application/vnd.oci.image.layer.v1.tar"
[stream_processors."io.containerd.ocicrypt.decoder.v1.tar.gzip"]
accepts = ["application/vnd.oci.image.layer.v1.tar+gzip+encrypted"]
args = ["--decryption-keys-path", "/etc/containerd/ocicrypt/keys"]
env = ["OCICRYPT_KEYPROVIDER_CONFIG=/etc/containerd/ocicrypt/ocicrypt_keyprovider.conf"]
path = "ctd-decoder"
returns = "application/vnd.oci.image.layer.v1.tar+gzip"
[timeouts]
"io.containerd.timeout.bolt.open" = "0s"
"io.containerd.timeout.shim.cleanup" = "5s"
"io.containerd.timeout.shim.load" = "5s"
"io.containerd.timeout.shim.shutdown" = "3s"
"io.containerd.timeout.task.state" = "2s"
[ttrpc]
address = ""
gid = 0
uid = 0
掘金
总结
配置镜像加速踩了不少坑，网上不少抄来抄去的，挺浪费时间的，总的来说，多去官方文档查阅
