本文主要是介绍K8S基于containerd做容器从harbor拉取镜，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！
实现创建pod时，通过指定harbor仓库里的镜像来运行pod
检查：K8S是不是用containerd做容器运行时，以及containerd的版本是不是小于1.6.22
kubectl get nodes -owide
1、如果containerd小于 1.6.22，需要先升级containerd
先卸载旧的，再下载1.6.22版本的containerd（每个节点都执行）
yum remove containerd.io -y
yum install containerd.io-1.6.22* -y
2、更换配置文件（每个节点都执行）
cd /etc/containerd/
rm -rf *
把config.toml文件传到 /etc/containerd/目录下
config.toml文件：
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 = 0level = ""uid = 0[grpc]address = "/run/containerd/containerd.sock"gid = 0max_recv_message_size = 16777216max_send_message_size = 16777216tcp_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 = 0mutation_threshold = 100pause_threshold = 0.02schedule_delay = "0s"startup_delay = "100ms"[plugins."io.containerd.grpc.v1.cri"]device_ownership_from_security_context = falsedisable_apparmor = falsedisable_cgroup = falsedisable_hugetlb_controller = truedisable_proc_mount = falsedisable_tcp_service = trueenable_selinux = falseenable_tls_streaming = falseenable_unprivileged_icmp = falseenable_unprivileged_ports = falseignore_image_defined_volumes = falsemax_concurrent_downloads = 3max_container_log_line_size = 16384netns_mounts_under_state_dir = falserestrict_oom_score_adj = falsesandbox_image = "registry.aliyuncs.com/google_containers/pause:3.7"selinux_category_range = 1024stats_collect_period = 10stream_idle_timeout = "4h0m0s"stream_server_address = "127.0.0.1"stream_server_port = "0"systemd_cgroup = falsetolerate_missing_hugetlb_controller = trueunset_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 = truediscard_unpacked_layers = falseignore_rdt_not_enabled_errors = falseno_pivot = falsesnapshotter = "overlayfs"[plugins."io.containerd.grpc.v1.cri".containerd.default_runtime]base_runtime_spec = ""cni_conf_dir = ""cni_max_conf_num = 0container_annotations = []pod_annotations = []privileged_without_host_devices = falseruntime_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 = 0container_annotations = []pod_annotations = []privileged_without_host_devices = falseruntime_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 = 0IoUid = 0NoNewKeyring = falseNoPivotRoot = falseRoot = ""ShimCgroup = ""SystemdCgroup = true[plugins."io.containerd.grpc.v1.cri".containerd.untrusted_workload_runtime]base_runtime_spec = ""cni_conf_dir = ""cni_max_conf_num = 0container_annotations = []pod_annotations = []privileged_without_host_devices = falseruntime_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]config_path = ""[plugins."io.containerd.grpc.v1.cri".registry.auths][plugins."io.containerd.grpc.v1.cri".registry.configs][plugins."io.containerd.grpc.v1.cri".registry.configs."192.168.40.184".tls]insecure_skip_verify = true[plugins."io.containerd.grpc.v1.cri".registry.configs."192.168.40.184".auth]username = "admin"password = "Harbor12345"[plugins."io.containerd.grpc.v1.cri".registry.headers][plugins."io.containerd.grpc.v1.cri".registry.mirrors][plugins."io.containerd.grpc.v1.cri".registry.mirrors."192.168.40.184"]endpoint = ["https://192.168.40.184:443"][plugins."io.containerd.grpc.v1.cri".registry.mirrors."docker.io"]endpoint = ["https://vh3bm52y.mirror.aliyuncs.com","https://registry.docker-cn.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 = 1.0service_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 = falseruntime = "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 = falsebase_image_size = ""discard_blocks = falsefs_options = ""fs_type = ""pool_name = ""root_path = ""[plugins."io.containerd.snapshotter.v1.native"]root_path = ""[plugins."io.containerd.snapshotter.v1.overlayfs"]root_path = ""upperdir_label = false[plugins."io.containerd.snapshotter.v1.zfs"]root_path = ""[plugins."io.containerd.tracing.processor.v1.otlp"]endpoint = ""insecure = falseprotocol = ""[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 = 0uid = 0修改config.toml配置文件里的信息：
1、harbor的ip地址，变成自己真实环境的harbor的ip
2、改为自己的harbor账号和密码
3、重启containerd（每个节点都执行）
systemctl restart containerd
4、查看重启后的状态（每个节点都执行）
systemctl status containerd
5、把docker也再重新安装一下（每个节点都执行）
PS. 用containerd跑容器，用docker做镜像
yum install docker-ce -y
systemctl start docker
6、将镜像上传到harbor（node节点执行）
先拉取一个docker仓库里的镜像到本地
docker pull nginx
重新打镜像标签，标签规范
- 192.168.40.184：harbor的IP地址
- library：harbor里的项目名称
docker tag docker.io/library/nginx:latest 192.168.40.184/library/nginx:v1.6
vim /etc/docker/daemon.json
{"registry-mirrors":["https://vh3bm52y.mirror.aliyuncs.com","https://registry.docker-cn.com","https://docker.mirrors.ustc.edu.cn","https://dockerhub.azk8s.cn","http://hub-mirror.c.163.com"],
"insecure-registries": ["192.168.40.184","harbor"]
}
改配置后，重启docker使配置生效
systemctl restart docker
在node节点配置harbor主机名
vim /etc/hosts
登录harbor
docker login 192.168.40.184
上传镜像到harbor
docker push 192.168.40.184/library/nginx:v1.6
7、创建pod，从harbor上拉取镜像（master节点执行）
vim pod.yaml
apiVersion: v1
kind: Pod
metadata:name: nginxnamespace: default
spec:containers:- name: nginximage: 192.168.40.184/library/nginx:v1.6 # 镜像指定刚刚上传到harbor上的imagePullPolicy: Always
创建资源
kubectl apply -f pod.yaml
查看pod
kubectl get pods | grep nginx
已成功运行
kubectl describe pod nginx
使用的是harbor里的镜像
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