kubernetes学习笔记(helm)

  1. 1. 安装helm
  2. 2. helm 基本功能
  3. 3. helm基本构成
  4. 4. helm安装chart示例
  5. 5. 查看helm chart支持的参数
  6. 6. 修改可配置选项
  7. 7. 删除

安装helm

我们可以使用以下命令安装helm

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$ curl -fsSL -o get_helm.sh https://raw.githubusercontent.com/helm/helm/master/scripts/get-helm-3
$ chmod 700 get_helm.sh
$ ./get_helm.sh

直接执行:

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curl https://raw.githubusercontent.com/helm/helm/master/scripts/get-helm-3 | bash

备注: 虽然存在包管理器安装,但官方并不建议使用

helm 基本功能

1.创建新的 chart
2.chart 打包成 tgz 格式
3.上传 chart 到 chart 仓库或从仓库中下载 chart
4.在Kubernetes集群中安装或卸载 chart
5.管理用Helm安装的 chart 的发布周期

helm基本构成

helm三大概念:
Chart 代表着 Helm 包。它包含在 Kubernetes 集群内部运行应用程序,工具或服务所需的所有资源定义。你可以把它看作是 Homebrew formula,Apt dpkg,或 Yum RPM 在Kubernetes 中的等价物。

Repository(仓库)是用来存放和共享 charts 的地方。它就像 Perl 的CPAN 档案库网络或是 Fedora 的软件包仓库,只不过它是供 Kubernetes 包所使用的。

Release是运行在 Kubernetes集群中的 chart 的实例。一个chart通常可以在同一个集群中安装多次。每一次安装都会创建一个新的Release。以 MySQL chart为例,如果你想在你的集群中运行两个数据库,你可以安装该chart两次。每一个数据库都会拥有它自己的release和 release name。

在了解了上述这些概念以后,我们就可以这样来解释 Helm:

Helm 安装charts到 Kubernetes 集群中,每次安装都会创建一个新的release。你可以在Helm的 chart repositories中寻找新的 chart。

helm安装chart示例

以nginx为例:
直接执行helm install安装

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helm install nginx bitnami/nginx 
NAME: nginx
LAST DEPLOYED: Thu Jun 24 11:01:24 2021
NAMESPACE: default
STATUS: deployed
REVISION: 1
TEST SUITE: None
NOTES:
** Please be patient while the chart is being deployed **

NGINX can be accessed through the following DNS name from within your cluster:

nginx.default.svc.cluster.local (port 80)

To access NGINX from outside the cluster, follow the steps below:

1. Get the NGINX URL by running these commands:

NOTE: It may take a few minutes for the LoadBalancer IP to be available.
Watch the status with: 'kubectl get svc --namespace default -w nginx'

export SERVICE_PORT=$(kubectl get --namespace default -o jsonpath="{.spec.ports[0].port}" services nginx)
export SERVICE_IP=$(kubectl get svc --namespace default nginx -o jsonpath='{.status.loadBalancer.ingress[0].ip}')
echo "http://${SERVICE_IP}:${SERVICE_PORT}"

查看helm chart支持的参数

以下是完整内容
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helm inspect values bitnami/nginx
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## Global Docker image parameters
## Please, note that this will override the image parameters, including dependencies, configured to use the global value
## Current available global Docker image parameters: imageRegistry and imagePullSecrets
##
# global:
# imageRegistry: myRegistryName
# imagePullSecrets:
# - myRegistryKeySecretName

## Bitnami NGINX image version
## ref: https://hub.docker.com/r/bitnami/nginx/tags/
##
image:
registry: docker.io
repository: bitnami/nginx
tag: 1.21.0-debian-10-r0
## Specify a imagePullPolicy
## Defaults to 'Always' if image tag is 'latest', else set to 'IfNotPresent'
## ref: http://kubernetes.io/docs/user-guide/images/#pre-pulling-images
##
pullPolicy: IfNotPresent
## Optionally specify an array of imagePullSecrets.
## Secrets must be manually created in the namespace.
## ref: https://kubernetes.io/docs/tasks/configure-pod-container/pull-image-private-registry/
## E.g.:
## pullSecrets:
## - myRegistryKeySecretName
##
pullSecrets: []
## Set to true if you would like to see extra information on logs
##
debug: false

## String to partially override nginx.fullname template (will maintain the release name)
##
# nameOverride:

## String to fully override nginx.fullname template
##
# fullnameOverride:

## Force target Kubernetes version (using Helm capabilites if not set)
##
kubeVersion:

## Deployment pod host aliases
## https://kubernetes.io/docs/concepts/services-networking/add-entries-to-pod-etc-hosts-with-host-aliases/
##
hostAliases: []

## Kubernetes Cluster Domain
##
clusterDomain: cluster.local

## Extra objects to deploy (value evaluated as a template)
##
extraDeploy: []

## Add labels to all the deployed resources
##
commonLabels: {}

## Add annotations to all the deployed resources
##
commonAnnotations: {}

## Command and args for running the container (set to default if not set). Use array form
##
# command:
# args:

## Additional environment variables to set
## E.g:
## extraEnvVars:
## - name: FOO
## value: BAR
##
extraEnvVars: []

## ConfigMap with extra environment variables
##
# extraEnvVarsCM:

## Secret with extra environment variables
##
# extraEnvVarsSecret:

## Get the server static content from a git repository
## NOTE: This will override staticSiteConfigmap and staticSitePVC
##
cloneStaticSiteFromGit:
enabled: false
## Bitnami Git image version
## ref: https://hub.docker.com/r/bitnami/git/tags/
##
image:
registry: docker.io
repository: bitnami/git
tag: 2.31.1-debian-10-r63
## Specify a imagePullPolicy
## Defaults to 'Always' if image tag is 'latest', else set to 'IfNotPresent'
## ref: http://kubernetes.io/docs/user-guide/images/#pre-pulling-images
##
pullPolicy: IfNotPresent
## Optionally specify an array of imagePullSecrets.
## Secrets must be manually created in the namespace.
## ref: https://kubernetes.io/docs/tasks/configure-pod-container/pull-image-private-registry/
##
# pullSecrets:
# - myRegistryKeySecretName
## Repository to clone static content from
##
# repository:
## Branch inside the git repository
##
# branch:
## Interval for sidecar container pull from the repository
##
interval: 60
## Additional configuration for git-clone-repository initContainer
##
gitClone:
## Override container command
##
command: []
## Override container args
##
args:
## Additional configuration for the git-repo-syncer container
##
gitSync:
## Override container command
##
command: []
## Override container args
##
args: []

## Additional environment variables to set for the in the containers that clone static site from git
## E.g:
## extraEnvVars:
## - name: FOO
## value: BAR
##
extraEnvVars: []
## Add extra volume mounts for the GIT containers
## Useful to mount keys to connect through ssh. (normally used with extraVolumes)
## E.g:
## extraVolumeMounts:
## - name: ssh-dir
## mountPath: /root/.ssh/
##
extraVolumeMounts: []

## Custom server block to be added to NGINX configuration
## PHP-FPM example server block:
## serverBlock: |-
## server {
## listen 0.0.0.0:8080;
## root /app;
## location / {
## index index.html index.php;
## }
## location ~ \.php$ {
## fastcgi_pass phpfpm-server:9000;
## fastcgi_index index.php;
## include fastcgi.conf;
## }
## }
##
# serverBlock:

## ConfigMap with custom server block to be added to NGINX configuration
## NOTE: This will override serverBlock
##
# existingServerBlockConfigmap:

## Name of existing ConfigMap with the server static site content
##
# staticSiteConfigmap

## Name of existing PVC with the server static site content
## NOTE: This will override staticSiteConfigmap
##
# staticSitePVC

## Number of replicas to deploy
##
replicaCount: 1

## Pod extra labels
## ref: https://kubernetes.io/docs/concepts/overview/working-with-objects/labels/
##
podLabels: {}

## Pod annotations
## ref: https://kubernetes.io/docs/concepts/overview/working-with-objects/annotations/
##
podAnnotations: {}

## Pod affinity preset
## ref: https://kubernetes.io/docs/concepts/scheduling-eviction/assign-pod-node/#inter-pod-affinity-and-anti-affinity
## Allowed values: soft, hard
##
podAffinityPreset: ""

## Pod anti-affinity preset
## Ref: https://kubernetes.io/docs/concepts/scheduling-eviction/assign-pod-node/#inter-pod-affinity-and-anti-affinity
## Allowed values: soft, hard
##
podAntiAffinityPreset: soft

## Node affinity preset
## Ref: https://kubernetes.io/docs/concepts/scheduling-eviction/assign-pod-node/#node-affinity
## Allowed values: soft, hard
##
nodeAffinityPreset:
## Node affinity type
## Allowed values: soft, hard
##
type: ""
## Node label key to match
## E.g.
## key: "kubernetes.io/e2e-az-name"
##
key: ""
## Node label values to match
## E.g.
## values:
## - e2e-az1
## - e2e-az2
##
values: []

## Affinity for pod assignment
## ref: https://kubernetes.io/docs/concepts/configuration/assign-pod-node/#affinity-and-anti-affinity
## Note: podAffinityPreset, podAntiAffinityPreset, and nodeAffinityPreset will be ignored when it's set
##
affinity: {}

## Node labels for pod assignment. Evaluated as a template.
## Ref: https://kubernetes.io/docs/user-guide/node-selection/
##
nodeSelector: {}

## Tolerations for pod assignment. Evaluated as a template.
## Ref: https://kubernetes.io/docs/concepts/configuration/taint-and-toleration/
##
tolerations: {}

## Priority class name
## ref: https://kubernetes.io/docs/concepts/configuration/pod-priority-preemption/#priorityclass
##
priorityClassName: ""

## NGINX pods' Security Context.
## ref: https://kubernetes.io/docs/tasks/configure-pod-container/security-context/#set-the-security-context-for-a-pod
##
podSecurityContext:
enabled: false
fsGroup: 1001
## sysctl settings
## Example:
## sysctls:
## - name: net.core.somaxconn
## value: "10000"
##
sysctls: []

## NGINX Core containers' Security Context (only main container).
## ref: https://kubernetes.io/docs/tasks/configure-pod-container/security-context/#set-the-security-context-for-a-container
##
containerSecurityContext:
enabled: false
runAsUser: 1001
runAsNonRoot: true

## Configures the ports NGINX listens on
##
containerPorts:
http: 8080
# https: 8443

## NGINX containers' resource requests and limits
## ref: http://kubernetes.io/docs/user-guide/compute-resources/
##
resources:
# We usually recommend not to specify default resources and to leave this as a conscious
# choice for the user. This also increases chances charts run on environments with little
# resources, such as Minikube. If you do want to specify resources, uncomment the following
# lines, adjust them as necessary, and remove the curly braces after 'resources:'.
limits: {}
# cpu: 100m
# memory: 128Mi
requests: {}
# cpu: 100m
# memory: 128Mi

## NGINX containers' liveness and readiness probes.
## ref: https://kubernetes.io/docs/concepts/workloads/pods/pod-lifecycle/#container-probes
##
livenessProbe:
enabled: true
initialDelaySeconds: 30
timeoutSeconds: 5
periodSeconds: 10
failureThreshold: 6
successThreshold: 1
readinessProbe:
enabled: true
initialDelaySeconds: 5
timeoutSeconds: 3
periodSeconds: 5
failureThreshold: 3
successThreshold: 1

## Custom Liveness probe
##
customLivenessProbe: {}

## Custom Rediness probe
##
customReadinessProbe: {}

## Autoscaling parameters
##
autoscaling:
enabled: false
# minReplicas: 1
# maxReplicas: 10
# targetCPU: 50
# targetMemory: 50

## Array to add extra volumes (evaluated as a template)
##
extraVolumes: []

## Array to add extra mounts (normally used with extraVolumes, evaluated as a template)
##
extraVolumeMounts: []

## Pods Service Account
## ref: https://kubernetes.io/docs/tasks/configure-pod-container/configure-service-account/
##
serviceAccount:
## Specifies whether a ServiceAccount should be created
##
create: false
## The name of the ServiceAccount to use.
## If not set and create is true, a name is generated using the `common.names.fullname` template
# name:

## Annotations for service account. Evaluated as a template.
## Only used if `create` is `true`.
##
annotations: {}

## NGINX Service properties
##
service:
## Service type
##
type: LoadBalancer

## HTTP Port
##
port: 80

## HTTPS Port
##
httpsPort: 443

## Specify the nodePort(s) value(s) for the LoadBalancer and NodePort service types.
## ref: https://kubernetes.io/docs/concepts/services-networking/service/#type-nodeport
##
nodePorts:
http: ""
https: ""

## Target port reference value for the Loadbalancer service types can be specified explicitly.
## Listeners for the Loadbalancer can be custom mapped to the http or https service.
## Example: Mapping the https listener to targetPort http [http: https]
##
targetPort:
http: http
https: https

## Set the LoadBalancer service type to internal only.
## ref: https://kubernetes.io/docs/concepts/services-networking/service/#internal-load-balancer
##
# loadBalancerIP:

## Provide any additional annotations which may be required. This can be used to
## set the LoadBalancer service type to internal only.
## ref: https://kubernetes.io/docs/concepts/services-networking/service/#internal-load-balancer
##
annotations: {}

## Enable client source IP preservation
## ref http://kubernetes.io/docs/tasks/access-application-cluster/create-external-load-balancer/#preserving-the-client-source-ip
##
externalTrafficPolicy: Cluster

## LDAP Auth Daemon Properties
##
## Daemon that will proxy LDAP requests
## between NGINX and a given LDAP Server
##
ldapDaemon:

enabled: false

## Bitnami NGINX LDAP Auth Daemon image
## ref: https://hub.docker.com/r/bitnami/nginx-ldap-auth-daemon/tags/
##
image:
registry: docker.io
repository: bitnami/nginx-ldap-auth-daemon
tag: 0.20200116.0-debian-10-r359
pullPolicy: IfNotPresent

## LDAP Daemon port
##
port: 8888

## LDAP Auth Daemon Configuration
##
## These different properties define the form of requests performed
## against the given LDAP server
##
## BEWARE THAT THESE VALUES WILL BE IGNORED IF A CUSTOM LDAP SERVER BLOCK
## ALREADY SPECIFIES THEM.
##
##
ldapConfig:

## LDAP URI where to query the server
## Must follow the pattern -> ldap[s]:/<hostname>:<port>
##
uri: ""

## LDAP search base DN
##
baseDN: ""

## LDAP bind DN
##
bindDN: ""

## LDAP bind Password
##
bindPassword: ""

## LDAP search filter
##
filter: ""

## LDAP auth realm
##
httpRealm: ""

## LDAP cookie name
##
httpCookieName: ""

## NGINX Configuration File containing the directives (that define
## how LDAP requests are performed) and tells NGINX to use the LDAP Daemon
## as proxy. Besides, it defines the routes that will require of LDAP auth
## in order to be accessed.
##
## If LDAP directives are provided, they will take precedence over
## the ones specified in ldapConfig.
##
## This will be evaluated as a template.
##
##

nginxServerBlock: |-
server {
listen 0.0.0.0:{{ .Values.containerPorts.http }};

# You can provide a special subPath or the root
location = / {
auth_request /auth-proxy;
}

location = /auth-proxy {
internal;

proxy_pass http://127.0.0.1:{{ .Values.ldapDaemon.port }};

###############################################################
# YOU SHOULD CHANGE THE FOLLOWING TO YOUR LDAP CONFIGURATION #
###############################################################

# URL and port for connecting to the LDAP server
# proxy_set_header X-Ldap-URL "ldap://YOUR_LDAP_SERVER_IP:YOUR_LDAP_SERVER_PORT";

# Base DN
# proxy_set_header X-Ldap-BaseDN "dc=example,dc=org";

# Bind DN
# proxy_set_header X-Ldap-BindDN "cn=admin,dc=example,dc=org";

# Bind password
# proxy_set_header X-Ldap-BindPass "adminpassword";
}
}

## Use an existing Secret holding an NGINX Configuration file that
## configures LDAP requests. (will be evaluated as a template)
##
## If provided, both nginxServerBlock and ldapConfig properties are ignored.
##
existingNginxServerBlockSecret:

## LDAP Auth Daemon containers' liveness and readiness probes.
## ref: https://kubernetes.io/docs/concepts/workloads/pods/pod-lifecycle/#container-probes
##
livenessProbe:
enabled: true
initialDelaySeconds: 30
timeoutSeconds: 5
periodSeconds: 10
failureThreshold: 6
successThreshold: 1
readinessProbe:
enabled: true
initialDelaySeconds: 5
timeoutSeconds: 3
periodSeconds: 5
failureThreshold: 3
successThreshold: 1

## Custom Liveness probe
##
customLivenessProbe: {}

## Custom Rediness probe
##
customReadinessProbe: {}

## Sidecar parameters
##
# sidecars:
# - name: your-image-name
# image: your-image
# imagePullPolicy: Always
# ports:
# - name: portname
# containerPort: 1234
sidecars:

## Extra init containers
##
initContainers:

## Configure the ingress resource that allows you to access the
## Nginx installation. Set up the URL
## ref: http://kubernetes.io/docs/user-guide/ingress/
##
ingress:
## Set to true to enable ingress record generation
##
enabled: false

## Set this to true in order to add the corresponding annotations for cert-manager
##
certManager: false

## Ingress Path type
##
pathType: ImplementationSpecific

## Override API Version (automatically detected if not set)
##
apiVersion:

## When the ingress is enabled, a host pointing to this will be created
##
hostname: nginx.local

## The Path to Nginx. You may need to set this to '/*' in order to use this
## with ALB ingress controllers.
##
path: /

## Ingress annotations done as key:value pairs
## For a full list of possible ingress annotations, please see
## ref: https://github.com/kubernetes/ingress-nginx/blob/master/docs/user-guide/nginx-configuration/annotations.md
##
## If certManager is set to true, annotation kubernetes.io/tls-acme: "true" will automatically be set
##
annotations: {}

## Enable TLS configuration for the hostname defined at ingress.hostname parameter
## TLS certificates will be retrieved from a TLS secret with name: {{- printf "%s-tls" .Values.ingress.hostname }}
## You can use the ingress.secrets parameter to create this TLS secret or relay on cert-manager to create it
##
tls: false

## The list of additional hostnames to be covered with this ingress record.
## Most likely the hostname above will be enough, but in the event more hosts are needed, this is an array
## extraHosts:
## - name: nginx.local
## path: /
##

## Any additional arbitrary paths that may need to be added to the ingress under the main host.
## For example: The ALB ingress controller requires a special rule for handling SSL redirection.
## extraPaths:
## - path: /*
## backend:
## serviceName: ssl-redirect
## servicePort: use-annotation
##

## The tls configuration for additional hostnames to be covered with this ingress record.
## see: https://kubernetes.io/docs/concepts/services-networking/ingress/#tls
## extraTls:
## - hosts:
## - nginx.local
## secretName: nginx.local-tls
##

## If you're providing your own certificates, please use this to add the certificates as secrets
## key and certificate should start with -----BEGIN CERTIFICATE----- or
## -----BEGIN RSA PRIVATE KEY-----
##
## name should line up with a tlsSecret set further up
## If you're using cert-manager, this is unneeded, as it will create the secret for you if it is not set
##
## It is also possible to create and manage the certificates outside of this helm chart
## Please see README.md for more information
##
secrets: []
## - name: nginx.local-tls
## key:
## certificate:
##

## Health Ingress parameters
##
healthIngress:
## Set to true to enable health ingress record generation
##
enabled: false

## Set this to true in order to add the corresponding annotations for cert-manager
##
certManager: false

## Ingress Path type
##
pathType: ImplementationSpecific

## When the health ingress is enabled, a host pointing to this will be created
##
hostname: example.local

## Health Ingress annotations done as key:value pairs
## For a full list of possible ingress annotations, please see
## ref: https://github.com/kubernetes/ingress-nginx/blob/master/docs/user-guide/nginx-configuration/annotations.md
##
## If certManager is set to true, annotation kubernetes.io/tls-acme: "true" will automatically be set
##
annotations: {}

## Enable TLS configuration for the hostname defined at healthIngress.hostname parameter
## TLS certificates will be retrieved from a TLS secret with name: {{- printf "%s-tls" .Values.healthIngress.hostname }}
## You can use the healthIngress.secrets parameter to create this TLS secret, relay on cert-manager to create it, or
## let the chart create self-signed certificates for you
##
tls: false

## The list of additional hostnames to be covered with this health ingress record.
## Most likely the hostname above will be enough, but in the event more hosts are needed, this is an array
## E.g.
## extraHosts:
## - name: example.local
## path: /
##
extraHosts: []

## The tls configuration for additional hostnames to be covered with this health ingress record.
## see: https://kubernetes.io/docs/concepts/services-networking/ingress/#tls
## E.g.
## extraTls:
## - hosts:
## - example.local
## secretName: example.local-tls
##
extraTls: []

## If you're providing your own certificates, please use this to add the certificates as secrets
## key and certificate should start with -----BEGIN CERTIFICATE----- or -----BEGIN RSA PRIVATE KEY-----
## name should line up with a secretName set further up
## If it is not set and you're using cert-manager, this is unneeded, as it will create the secret for you
## If it is not set and you're NOT using cert-manager either, self-signed certificates will be created
## It is also possible to create and manage the certificates outside of this helm chart
## Please see README.md for more information
##
## E.g.
## secrets:
## - name: example.local-tls
## key:
## certificate:
##
secrets: []

## Prometheus Exporter / Metrics
##
metrics:
enabled: false

## Specify which port is used by the exporter to retrieve the NGINX status.
## Defaults to specified http port
port:

## Bitnami NGINX Prometheus Exporter image
## ref: https://hub.docker.com/r/bitnami/nginx-exporter/tags/
##
image:
registry: docker.io
repository: bitnami/nginx-exporter
tag: 0.9.0-debian-10-r66
pullPolicy: IfNotPresent
## Optionally specify an array of imagePullSecrets.
## Secrets must be manually created in the namespace.
## ref: https://kubernetes.io/docs/tasks/configure-pod-container/pull-image-private-registry/
##
# pullSecrets:
# - myRegistryKeySecretName

## Prometheus exporter pods' annotation and labels
## ref: https://kubernetes.io/docs/concepts/overview/working-with-objects/annotations/
##
podAnnotations: {}

## Container Security Context
## ref: https://kubernetes.io/docs/tasks/configure-pod-container/security-context/
##
securityContext:
enabled: false
runAsUser: 1001

## Prometheus exporter service parameters
##
service:
## NGINX Prometheus exporter port
##
port: 9113
## Annotations for the Prometheus exporter service
##
annotations:
prometheus.io/scrape: "true"
prometheus.io/port: "{{ .Values.metrics.service.port }}"

## NGINX Prometheus exporter resource requests and limits
## ref: http://kubernetes.io/docs/user-guide/compute-resources/
##
resources:
# We usually recommend not to specify default resources and to leave this as a conscious
# choice for the user. This also increases chances charts run on environments with little
# resources, such as Minikube. If you do want to specify resources, uncomment the following
# lines, adjust them as necessary, and remove the curly braces after 'resources:'.
limits: {}
# cpu: 100m
# memory: 128Mi
requests: {}
# cpu: 100m
# memory: 128Mi

## Prometheus Operator ServiceMonitor configuration
##
serviceMonitor:
enabled: false
## Namespace in which Prometheus is running
##
# namespace: monitoring

## Interval at which metrics should be scraped.
## ref: https://github.com/coreos/prometheus-operator/blob/master/Documentation/api.md#endpoint
##
# interval: 10s

## Timeout after which the scrape is ended
## ref: https://github.com/coreos/prometheus-operator/blob/master/Documentation/api.md#endpoint
##
# scrapeTimeout: 10s

## ServiceMonitor selector labels
## ref: https://github.com/bitnami/charts/tree/master/bitnami/prometheus-operator#prometheus-configuration
##
# selector:
# prometheus: my-prometheus

## Pod Disruption Budget configuration
## ref: https://kubernetes.io/docs/tasks/run-application/configure-pdb/
##
pdb:
create: false
## Min number of pods that must still be available after the eviction
##
minAvailable: 1
## Max number of pods that can be unavailable after the eviction
##
# maxUnavailable: 1

修改可配置选项

在config.yaml 中自定义所需的选项

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tag: latest
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helm upgrade -f config.yaml  nginx bitnami/nginx
Release "nginx" has been upgraded. Happy Helming!
NAME: nginx
LAST DEPLOYED: Thu Jun 24 11:08:00 2021
NAMESPACE: default
STATUS: deployed
REVISION: 2
TEST SUITE: None
NOTES:
** Please be patient while the chart is being deployed **

NGINX can be accessed through the following DNS name from within your cluster:

nginx.default.svc.cluster.local (port 80)

To access NGINX from outside the cluster, follow the steps below:

1. Get the NGINX URL by running these commands:

NOTE: It may take a few minutes for the LoadBalancer IP to be available.
Watch the status with: 'kubectl get svc --namespace default -w nginx'

export SERVICE_PORT=$(kubectl get --namespace default -o jsonpath="{.spec.ports[0].port}" services nginx)
export SERVICE_IP=$(kubectl get svc --namespace default nginx -o jsonpath='{.status.loadBalancer.ingress[0].ip}')
echo "http://${SERVICE_IP}:${SERVICE_PORT}"
WARNING: Rolling tag detected (bitnami/nginx:latest), please note that it is strongly recommended to avoid using rolling tags in a production environment.
+info https://docs.bitnami.com/containers/how-to/understand-rolling-tags-containers/



kubectl get pods
NAME READY STATUS RESTARTS AGE
nginx-84f6956df4-8pg9k 1/1 Running 0 37s

删除

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helm delete nginx 
release "nginx" uninstalled