</a>

---

Istio is an open source service mesh that layers transparently onto existing distributed applications. Istio’s powerful features provide a uniform and more efficient way to secure, connect, and monitor services. Istio is the path to load balancing, service-to-service authentication, and monitoring – with few or no service code changes.

OkHttp perseveres when the network is troublesome: it will silently recover from common connection
problems. If your service has multiple IP addresses, OkHttp will attempt alternate addresses if the
first connect fails. This is necessary for IPv4+IPv6 and services hosted in redundant data
centers. OkHttp supports modern TLS features (TLS 1.3, ALPN, certificate pinning). It can be
configured to fall back for broad connectivity.

Each process, or "runtime", applies different constraints to the code that runs in that process.
For example, each process has different supported JVMs and a different set of services available for dependency injection.
While a lot of Gradle source code runs only in the Gradle daemon, not all of it does and so, when working on some source code it is important to be aware of the runtimes in which it will run.

- `svcaccts[].accessKey` - accessKey of service account
- `svcaccts[].secretKey` - secretKey of svcacctsecretRef
- `svcaccts[].existingSecret` - secret name that contains the secretKey of service account
- `svcaccts[].existingSecretKey` - data key in existingSecret secret containing the secretKey
- `svcaccts[].user` - name of the parent user to assign to service account

## Uninstalling the Chart

    - `istio-cni-config` configmap with CNI plugin config to add to CNI plugin chained config
    - creates service-account `istio-cni` with `ClusterRoleBinding` to allow gets on pods' info and delete/modifications for recovery.

- `install-cni` container
    - copies `istio-cni` and `istio-iptables` to `/opt/cni/bin`
    - creates kubeconfig for the service account the pod runs under

### 4. Update `scrape_configs` section in prometheus.yml

To authorize every scrape request, copy and paste the generated `scrape_configs` section in the prometheus.yml and restart the Prometheus service.

### 5. Start Prometheus

Start (or) Restart Prometheus service by running

```sh
./prometheus --config.file=prometheus.yml
```

- For installations using Systemd MinIO service, upgrade via RPM/DEB packages **parallelly** on all servers or replace the binary lets say `/opt/bin/minio` on all nodes, apply executable permissions `chmod +x /opt/bin/minio` and process to perform `mc admin service restart alias/`.

### Upgrade Checklist

### Examples

#### Egress Gateway

Deploying a Gateway to be used as an [Egress Gateway](https://istio.io/latest/docs/tasks/traffic-management/egress/egress-gateway/):

```yaml
service:
  # Egress gateways do not need an external LoadBalancer IP
  type: ClusterIP
```

#### Multi-network/VM Gateway

`<Address for MinIO Service>/minio/v2/metrics/cluster`.

The additional node specific metrics which include additional go metrics or process metrics are exposed at
`<Address for MinIO Node>/minio/v2/metrics/node`.

feature, and can be performed by different people/teams at different times.

It is strongly recommended that different namespaces are used, with different service accounts.
In particular access to the security-critical production components (root CA, policy, control)
should be locked down and restricted.  The new installer allows multiple instances of