containerd与kubernetes集成部署
部署环境
# 操作系统： CentOS Linux release 7.6.1810 (Core)
# kubelet 版本： v1.14.6
# containerd版本：1.3.0
# crictl 版本：v1.16.1
# cni版本：v0.8.2
#工作目录： /apps/k8s
# 二进制文件目录： /usr/local/bin/
# cni 目录：/apps/cni准备所需二进制文件
wget https://github.com/kubernetes-sigs/cri-tools/releases/download/v1.16.1/crictl-v1.16.1-linux-amd64.tar.gz
wget https://github.com/containerd/containerd/releases/download/v1.3.0/containerd-1.3.0.linux-amd64.tar.gz
wget https://github.com/containernetworking/plugins/releases/download/v0.8.2/cni-plugins-linux-amd64-v0.8.2.tgz解压下载文件到相应的目录
tar -xvf containerd-1.3.0.linux-amd64.tar.gz
mv bin/* /usr/local/bin/
tar -xvf crictl-v1.16.1-linux-amd64.tar.gz
mv crictl /usr/local/bin/
# cni 解压
mkdir -p /apps/cni/bin/
tar -xvf cni-plugins-linux-amd64-v0.8.2.tgz -C /apps/cni/bin/准备配置文件
# containerd 配置文件准备
mkdir -p /apps/k8s/etc/containerd
vi /apps/k8s/etc/containerd/config.toml
----------------------------------------------------------------------
[plugins.opt]
path = "/apps/k8s/containerd"
[plugins.cri]
stream_server_address = "127.0.0.1"
stream_server_port = "10010"
sandbox_image = "docker.io/juestnow/pause-amd64:3.1"
max_concurrent_downloads = 20
[plugins.cri.containerd]
snapshotter = "overlayfs"
[plugins.cri.containerd.default_runtime]
runtime_type = "io.containerd.runtime.v1.linux"
runtime_engine = ""
runtime_root = ""
[plugins.cri.containerd.untrusted_workload_runtime]
runtime_type = ""
runtime_engine = ""
runtime_root = ""
[plugins.cri.cni]
bin_dir = "/apps/cni/bin"
conf_dir = "/etc/cni/net.d"
[plugins."io.containerd.runtime.v1.linux"]
shim = "containerd-shim"
runtime = "runc"
runtime_root = ""
no_shim = false
shim_debug = false
[plugins."io.containerd.runtime.v2.task"]
platforms = ["linux/amd64"]
-------------------------------------------------------------------
# crictl 配置文件准备
vim /etc/crictl.yaml
------------------------------------------------------------------
runtime-endpoint: unix:///run/k8s/containerd/containerd.sock
image-endpoint: unix:///run/k8s/containerd/containerd.sock
timeout: 10
debug: false准备containerd 启动文件
由于先前已经安装了docker containerd.service 文件已经存在，为了保证docker 正常运行 新安装的修改为containerdk8s
vim /usr/lib/systemd/system/containerdk8s.service
-----------------------------------------------------------------------------
[Unit]
Description=Lightweight Kubernetes
Documentation=https://containerd.io
After=network-online.target
[Service]
ExecStartPre=-/sbin/modprobe br_netfilter
ExecStartPre=-/sbin/modprobe overlay
ExecStartPre=-/bin/mkdir -p /run/k8s/containerd
ExecStart=/usr/local/bin/containerd \
-c /apps/k8s/etc/containerd/config.toml \
-a /run/k8s/containerd/containerd.sock \
--state /apps/k8s/run/containerd \
--root /apps/k8s/containerd
KillMode=process
Delegate=yes
OOMScoreAdjust=-999
LimitNOFILE=1024000 # 决定容器里面文件打开数可以在这里设置
LimitNPROC=1024000
LimitCORE=infinity
TasksMax=infinity
TimeoutStartSec=0
Restart=always
RestartSec=5s
[Install]
WantedBy=multi-user.target启动containerd
systemctl start containerdk8s.service
设置开机启动
systemctl enable containerdk8s.service验证containerd 部署是否正常
crictl ps -a
crictl images
crictl pull busybox:1.25.0
[root@ingress-01 tmp]# crictl pull busybox:1.25.0
crictl pull busybox:1.25.0Image is up to date for busybox@sha256:a59906e33509d14c036c8678d687bd4eec81ed7c4b8ce907b888c607f6a1e0e6
# 成功拉取容器kubelet 配置文件以支持containerd
vim /apps/kubernetes/conf/kubelet
----------------------------------------------------------------------------------------------------------------------------
KUBELET_OPTS="--bootstrap-kubeconfig=/apps/kubernetes/conf/bootstrap.kubeconfig \
--fail-swap-on=false \
--network-plugin=cni --cni-conf-dir=/etc/cni/net.d --cni-bin-dir=/apps/cni/bin \
--kubeconfig=/apps/kubernetes/conf/kubelet.kubeconfig \
--address=192.168.30.36 \
--node-ip=192.168.30.36 \
--hostname-override=ingress-01 \
--cluster-DNS=10.64.0.2 \
--cluster-domain=cluster.local \
--authorization-mode=Webhook \
--authentication-token-webhook=true \
--client-ca-file=/apps/kubernetes/ssl/k8s/k8s-ca.pem \
--rotate-certificates=true \
--cgroup-driver=cgroupfs \
--allow-privileged=true \
--healthz-port=10248 \
--healthz-bind-address=192.168.30.36 \
--cert-dir=/apps/kubernetes/ssl \
--feature-gates=RotateKubeletClientCertificate=true,RotateKubeletServerCertificate=true \
--node-labels=node-role.kubernetes.io/k8s-ingress=true \
--serialize-image-pulls=false \
--enforce-node-allocatable=pods,kube-reserved,system-reserved \
--pod-manifest-path=/apps/work/kubernetes/manifests \
--runtime-cgroups=/systemd/system.slice/kubelet.service \
--kube-reserved-cgroup=/systemd/system.slice/kubelet.service \
--system-reserved-cgroup=/systemd/system.slice \
--root-dir=/apps/work/kubernetes/kubelet \
--log-dir=/apps/kubernetes/log \
--alsologtostderr=true \
--logtostderr=false \
--anonymous-auth=true \
--container-log-max-files=10 \
--container-log-max-size=100Mi \
--container-runtime=remote \
--container-runtime-endpoint=unix:///run/k8s/containerd/containerd.sock \
--containerd=unix:///run/k8s/containerd/containerd.sock \
--runtime-request-timeout=15m \
--image-gc-high-threshold=70 \
--image-gc-low-threshold=50 \
--kube-reserved=cpu=500m,memory=512Mi,ephemeral-storage=1Gi \
--system-reserved=cpu=1000m,memory=1024Mi,ephemeral-storage=1Gi \
--eviction-hard=memory.available<500Mi,nodefs.available<10% \
--serialize-image-pulls=false \
--sync-frequency=30s \
--resolv-conf=/etc/resolv.conf \
--pod-infra-container-image=docker.io/juestnow/pause-amd64:3.1 \
--image-pull-progress-deadline=30s \
--v=2 \
--event-burst=30 \
--event-qps=15 \
--kube-api-burst=30 \
--kube-api-qps=15 \
--max-pods=100 \
--pods-per-core=10 \
--read-only-port=0 \
--allowed-unsafe-sysctls 'kernel.msg*,kernel.shm*,kernel.sem,fs.mqueue.*,net.*' \
--volume-plugin-dir=/apps/kubernetes/kubelet-plugins/volume"
---------------------------------------------------------------------------------------------------------------------------------------------
# 修改启动文件kubelet.service
vim /usr/lib/systemd/system/kubelet.service
--------------------------------------------------------------------------------------------------------------------------------------------
[Unit]
Description=Kubernetes Kubelet
After=containerdk8s.service
Requires=containerdk8s.service
[Service]
ExecStartPre=-/bin/mkdir -p /sys/fs/cgroup/hugetlb/systemd/system.slice/kubelet.service
ExecStartPre=-/bin/mkdir -p /sys/fs/cgroup/blkio/systemd/system.slice/kubelet.service
ExecStartPre=-/bin/mkdir -p /sys/fs/cgroup/cpuset/systemd/system.slice/kubelet.service
ExecStartPre=-/bin/mkdir -p /sys/fs/cgroup/devices/systemd/system.slice/kubelet.service
ExecStartPre=-/bin/mkdir -p /sys/fs/cgroup/net_cls,net_prio/systemd/system.slice/kubelet.service
ExecStartPre=-/bin/mkdir -p /sys/fs/cgroup/perf_event/systemd/system.slice/kubelet.service
ExecStartPre=-/bin/mkdir -p /sys/fs/cgroup/cpu,cpuacct/systemd/system.slice/kubelet.service
ExecStartPre=-/bin/mkdir -p /sys/fs/cgroup/freezer/systemd/system.slice/kubelet.service
ExecStartPre=-/bin/mkdir -p /sys/fs/cgroup/memory/systemd/system.slice/kubelet.service
ExecStartPre=-/bin/mkdir -p /sys/fs/cgroup/pids/systemd/system.slice/kubelet.service
ExecStartPre=-/bin/mkdir -p /sys/fs/cgroup/systemd/systemd/system.slice/kubelet.service
EnvironmentFile=-/apps/kubernetes/conf/kubelet
ExecStart=/apps/kubernetes/bin/kubelet $KUBELET_OPTS
Restart=on-failure
KillMode=process
LimitNOFILE=1024000
LimitNPROC=1024000
LimitCORE=infinity
LimitMEMLOCK=infinity
[Install]
WantedBy=multi-user.target
# 说明在使用docker 时可以不需要创建kubelet.service 目录
# 使用containerd 必须手动创建目录重启kubelet
# 配置生效
systemctl daemon-reload
# 重启 kubelet
systemctl restart kubelet
# 查看 kubelet 是否启动成功
systemctl status kubelet验证kubelet 是否使用containerd
[root@ingress-01 ~]# crictl ps
CONTAINER IMAGE CREATED STATE NAME ATTEMPT POD ID
35df1da048da6 8f04a7056ad34 9 days ago Running kube-router 0 85c23c6b85ebc
48f0dc7df9639 cda2583339c95 9 days ago Running consul 4 9cebd1643a3df
76e5edca510c1 70a40025bbab5 9 days ago Running traefik 3 3f1f2a000a8fa
12f2ccf4702ce e5a616e4b9cf6 9 days ago Running node-exporter 2 13f2894af33a5
3b8881a826bed 8f81e24b54353 9 days ago Running process-exporter 5 935bfe1a9b028
[root@ingress-01 ~]# crictl images
IMAGE TAG IMAGE ID SIZE
docker.io/cloudnativelabs/kube-router latest 8f04a7056ad34 31.6MB
docker.io/istio/install-cni 1.3.0 0f31f2c08c2f3 58.4MB
docker.io/juestnow/pause-amd64 3.1 da86e6ba6ca19 326kB
docker.io/juestnow/process-exporter v0.5.0 8f81e24b54353 5.86MB
docker.io/library/alpine latest 961769676411f 2.79MB
docker.io/library/busybox latest 19485c79a9bbd 765kB
docker.io/library/consul 1.5.0 cda2583339c95 43.1MB
docker.io/library/nginx latest f949e7d76d63b 50.7MB
docker.io/library/traefik v1.7.17 70a40025bbab5 24MB
docker.io/prom/node-exporter v0.18.1 e5a616e4b9cf6 11.1MB
# 一切正常
# kubelet 使用containerd 不能监控容器 网络流量是很遗憾的一件事
# 关闭docker
service docker stop
# 取消docker 开机启动
chkconfig docker offcontainerd 单独运行容器
# 创建cni配置
vi /etc/cni/net.d/10-mynet.conf
------------------------------------------------------------------------
{
"cniVersion": "0.2.0",
"name": "mynet",
"type": "bridge",
"bridge": "cni0",
"isGateway": true,
"ipMasq": true,
"ipam": {
"type": "host-local",
"subnet": "10.22.0.0/16",
"routes": [
{ "dst": "0.0.0.0/0" }
]
}
}
-----------------------------------------------------------------------------创建启动容器的配置
vi pod-config.json
--------------------------------
{
"metadata": {
"name": "sandbox",
"namespace": "default",
"attempt": 1,
"uid": "hdishd83djaidwnduwk28bcsb"
},
"log_directory": "/tmp",
"linux": {
}
}
-------------------------------------
vi container-config.json
-------------------------------------
{
"metadata": {
"name": "busybox"
},
"image":{
"image": "busybox"
},
"command": [
"top"
],
"log_path":"busybox/0.log",
"linux": {
}
}
------------------------
# 创建runp
crictl runp pod-config.json
# 输出一段字符串
crictl create b89dcd8cefcad50d8ae7153e01b7205a1f8497e8de40aa3337e52c116a626c1e container-config.json pod-config.json
# 查看创建容器
crictl ps -a
# 启动容器
crictl start 768ffe572c595
# 进入容器
crictl exec -ti 768ffe572c595 /bin/sh
# 如果能正常进入容器的话证明一起正常咯
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